"use client";

import { useRef, useState } from "react";
import { useFocusTrap } from "~/hooks/useFocusTrap.js";
import type { Resource, SkillEntry } from "@capakraken/shared";
import { GERMAN_FEDERAL_STATES, inferStateFromPostalCode, ResourceType } from "@capakraken/shared";
import { trpc } from "~/lib/trpc/client.js";
import { InfoTooltip } from "~/components/ui/InfoTooltip.js";
import { usePermissions } from "~/hooks/usePermissions.js";

interface RoleAssignment {
  roleId: string;
  isPrimary: boolean;
}

type RoleOption = { id: string; name: string; color?: string | null };
type CountryOption = { id: string; name: string; metroCities: { id: string; name: string }[] };
type OrgUnitOption = { id: string; name: string; level: number; isActive: boolean };
type ClientOption = { id: string; name: string };
type ManagementGroupOption = { id: string; name: string; levels: { id: string; name: string }[] };

interface SkillRow {
  skill: string;
  proficiency: 1 | 2 | 3 | 4 | 5;
  yearsExperience: string;
  category: string;
  certified: boolean;
  isMainSkill: boolean;
}

interface FormState {
  eid: string;
  displayName: string;
  email: string;
  chapter: string;
  lcrEuros: string;
  ucrEuros: string;
  currency: string;
  chargeabilityTarget: string;
  monday: string;
  tuesday: string;
  wednesday: string;
  thursday: string;
  friday: string;
  skills: SkillRow[];
  roles: RoleAssignment[];
  portfolioUrl: string;
  roleId: string;
  postalCode: string;
  federalState: string;
  countryId: string;
  metroCityId: string;
  orgUnitId: string;
  managementLevelGroupId: string;
  managementLevelId: string;
  resourceType: string;
  chgResponsibility: boolean;
  rolledOff: boolean;
  departed: boolean;
  enterpriseId: string;
  clientUnitId: string;
  fte: string;
}

function resourceToFormState(resource: Resource): FormState {
  const skills = (resource.skills as SkillEntry[]).map((s) => ({
    skill: s.skill,
    proficiency: s.proficiency,
    yearsExperience: s.yearsExperience != null ? String(s.yearsExperience) : "",
    category: s.category ?? "",
    certified: s.certified ?? false,
    isMainSkill: s.isMainSkill ?? false,
  }));

  const roles: RoleAssignment[] = (resource.roles ?? []).map((r) => ({
    roleId: r.roleId,
    isPrimary: r.isPrimary,
  }));

  const resourceWithMeta = resource as unknown as {
    portfolioUrl?: string | null;
    roleId?: string | null;
  };

  return {
    eid: resource.eid,
    displayName: resource.displayName,
    email: resource.email,
    chapter: resource.chapter ?? "",
    lcrEuros: String(resource.lcrCents / 100),
    ucrEuros: String(resource.ucrCents / 100),
    currency: resource.currency,
    chargeabilityTarget: String(resource.chargeabilityTarget),
    monday: String(resource.availability.monday),
    tuesday: String(resource.availability.tuesday),
    wednesday: String(resource.availability.wednesday),
    thursday: String(resource.availability.thursday),
    friday: String(resource.availability.friday),
    skills,
    roles,
    portfolioUrl: resourceWithMeta.portfolioUrl ?? "",
    roleId: resourceWithMeta.roleId ?? "",
    postalCode: (resource as unknown as { postalCode?: string | null }).postalCode ?? "",
    federalState: (resource as unknown as { federalState?: string | null }).federalState ?? "",
    countryId: (resource as unknown as { countryId?: string | null }).countryId ?? "",
    metroCityId: (resource as unknown as { metroCityId?: string | null }).metroCityId ?? "",
    orgUnitId: (resource as unknown as { orgUnitId?: string | null }).orgUnitId ?? "",
    managementLevelGroupId: (resource as unknown as { managementLevelGroupId?: string | null }).managementLevelGroupId ?? "",
    managementLevelId: (resource as unknown as { managementLevelId?: string | null }).managementLevelId ?? "",
    resourceType: (resource as unknown as { resourceType?: string }).resourceType ?? "EMPLOYEE",
    chgResponsibility: (resource as unknown as { chgResponsibility?: boolean }).chgResponsibility ?? true,
    rolledOff: (resource as unknown as { rolledOff?: boolean }).rolledOff ?? false,
    departed: (resource as unknown as { departed?: boolean }).departed ?? false,
    enterpriseId: (resource as unknown as { enterpriseId?: string | null }).enterpriseId ?? "",
    clientUnitId: (resource as unknown as { clientUnitId?: string | null }).clientUnitId ?? "",
    fte: String((resource as unknown as { fte?: number }).fte ?? 1),
  };
}

function defaultFormState(): FormState {
  return {
    eid: "",
    displayName: "",
    email: "",
    chapter: "",
    lcrEuros: "",
    ucrEuros: "",
    currency: "EUR",
    chargeabilityTarget: "80",
    monday: "8",
    tuesday: "8",
    wednesday: "8",
    thursday: "8",
    friday: "8",
    skills: [],
    roles: [],
    portfolioUrl: "",
    roleId: "",
    postalCode: "",
    federalState: "",
    countryId: "",
    metroCityId: "",
    orgUnitId: "",
    managementLevelGroupId: "",
    managementLevelId: "",
    resourceType: "EMPLOYEE",
    chgResponsibility: true,
    rolledOff: false,
    departed: false,
    enterpriseId: "",
    clientUnitId: "",
    fte: "1",
  };
}

function defaultSkillRow(): SkillRow {
  return { skill: "", proficiency: 3, yearsExperience: "", category: "", certified: false, isMainSkill: false };
}

interface ResourceModalProps {
  mode: "create" | "edit";
  resource?: Resource;
  onClose: () => void;
}

const INPUT_CLASS =
  "w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-lg focus:outline-none focus:ring-2 focus:ring-brand-500 text-sm bg-white dark:bg-gray-900 dark:text-gray-100";
const LABEL_CLASS = "block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1";
const SECTION_HEADER_CLASS = "text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase tracking-wider mb-3 mt-4";
const PRIMARY_BTN =
  "px-4 py-2 bg-brand-600 text-white rounded-lg hover:bg-brand-700 text-sm font-medium disabled:opacity-50";

function Spinner() {
  return (
    <svg
      className="animate-spin h-4 w-4 text-white inline-block mr-2"
      xmlns="http://www.w3.org/2000/svg"
      fill="none"
      viewBox="0 0 24 24"
      aria-hidden="true"
    >
      <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
      <path
        className="opacity-75"
        fill="currentColor"
        d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
      />
    </svg>
  );
}

export function ResourceModal({ mode, resource, onClose }: ResourceModalProps) {
  const [form, setForm] = useState<FormState>(() =>
    resource ? resourceToFormState(resource) : defaultFormState(),
  );
  const [errorMsg, setErrorMsg] = useState<string | null>(null);
  const [confirmDelete, setConfirmDelete] = useState(false);

  const panelRef = useRef<HTMLDivElement>(null);
  useFocusTrap(panelRef, true);

  const { canManageUsers } = usePermissions();
  const utils = trpc.useUtils();

  const { data: availableRoles } = trpc.role.list.useQuery(
    { isActive: true },
    { staleTime: 60_000 },
  );

  const { data: countries } = trpc.country.list.useQuery(undefined, { staleTime: 60_000 });
  const { data: orgUnits } = trpc.orgUnit.list.useQuery(undefined, { staleTime: 60_000 });
  const { data: mgmtGroups } = trpc.managementLevel.listGroups.useQuery(undefined, { staleTime: 60_000 });
  const { data: clients } = trpc.clientEntity.list.useQuery(undefined, { staleTime: 60_000 });

  const roleOptions = (availableRoles ?? []) as unknown as RoleOption[];
  const countryOptions = (countries ?? []) as unknown as CountryOption[];
  const orgUnitOptions = (orgUnits ?? []) as unknown as OrgUnitOption[];
  const managementGroupOptions = (mgmtGroups ?? []) as unknown as ManagementGroupOption[];
  const clientOptions = (clients ?? []) as unknown as ClientOption[];

  // Derive metro cities from selected country
  const selectedCountry = countryOptions.find((c) => c.id === form.countryId);
  const metroCities = selectedCountry?.metroCities ?? [];

  // Derive levels from selected group
  const selectedGroup = managementGroupOptions.find((g) => g.id === form.managementLevelGroupId);
  const mgmtLevels = selectedGroup?.levels ?? [];

  const createMutation = trpc.resource.create.useMutation();
  const updateMutation = trpc.resource.update.useMutation();
  const hardDeleteMutation = trpc.resource.hardDelete.useMutation({
    onSuccess: () => {
      void utils.resource.invalidate();
      onClose();
    },
    onError: (err) => {
      setErrorMsg(err.message);
    },
  });

  const isMutating = createMutation.isPending || updateMutation.isPending || hardDeleteMutation.isPending;

  function setField<K extends keyof FormState>(key: K, value: FormState[K]) {
    setForm((prev) => ({ ...prev, [key]: value }));
    setErrorMsg(null);
  }

  function setSkillField(index: number, key: keyof SkillRow, value: string | number | boolean) {
    setForm((prev) => {
      const skills = prev.skills.map((s, i) => (i === index ? { ...s, [key]: value } : s));
      return { ...prev, skills };
    });
  }

  function addSkill() {
    setForm((prev) => ({ ...prev, skills: [...prev.skills, defaultSkillRow()] }));
  }

  function removeSkill(index: number) {
    setForm((prev) => ({ ...prev, skills: prev.skills.filter((_, i) => i !== index) }));
  }

  function buildPayload() {
    const lcrCents = Math.round(parseFloat(form.lcrEuros || "0") * 100);
    const ucrCents = Math.round(parseFloat(form.ucrEuros || "0") * 100);
    const chargeabilityTarget = parseFloat(form.chargeabilityTarget || "80");

    const mainSkillCount = form.skills.filter((s) => s.isMainSkill).length;
    const skills = form.skills
      .filter((s) => s.skill.trim() !== "")
      .map((s) => ({
        skill: s.skill.trim(),
        proficiency: s.proficiency,
        ...(s.yearsExperience !== "" ? { yearsExperience: parseFloat(s.yearsExperience) } : {}),
        ...(s.category.trim() !== "" ? { category: s.category.trim() } : {}),
        ...(s.certified ? { certified: s.certified } : {}),
        ...(s.isMainSkill ? { isMainSkill: true } : {}),
      }));

    void mainSkillCount; // used for UI validation only

    return {
      eid: form.eid.trim(),
      displayName: form.displayName.trim(),
      email: form.email.trim(),
      ...(form.chapter.trim() !== "" ? { chapter: form.chapter.trim() } : {}),
      lcrCents,
      ucrCents,
      currency: form.currency,
      chargeabilityTarget,
      availability: {
        monday: parseFloat(form.monday || "8"),
        tuesday: parseFloat(form.tuesday || "8"),
        wednesday: parseFloat(form.wednesday || "8"),
        thursday: parseFloat(form.thursday || "8"),
        friday: parseFloat(form.friday || "8"),
      },
      skills,
      roles: form.roles,
      ...(form.portfolioUrl.trim() !== "" ? { portfolioUrl: form.portfolioUrl.trim() } : {}),
      ...(form.roleId.trim() !== "" ? { roleId: form.roleId.trim() } : {}),
      ...(form.postalCode.trim() !== "" ? { postalCode: form.postalCode.trim() } : {}),
      ...(form.federalState.trim() !== "" ? { federalState: form.federalState.trim() } : {}),
      ...(form.countryId ? { countryId: form.countryId } : {}),
      ...(form.metroCityId ? { metroCityId: form.metroCityId } : {}),
      ...(form.orgUnitId ? { orgUnitId: form.orgUnitId } : {}),
      ...(form.managementLevelGroupId ? { managementLevelGroupId: form.managementLevelGroupId } : {}),
      ...(form.managementLevelId ? { managementLevelId: form.managementLevelId } : {}),
      resourceType: form.resourceType as ResourceType,
      chgResponsibility: form.chgResponsibility,
      rolledOff: form.rolledOff,
      departed: form.departed,
      ...(form.enterpriseId.trim() !== "" ? { enterpriseId: form.enterpriseId.trim() } : {}),
      ...(form.clientUnitId ? { clientUnitId: form.clientUnitId } : {}),
      fte: parseFloat(form.fte) || 1,
    };
  }

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setErrorMsg(null);

    const payload = buildPayload();

    try {
      if (mode === "create") {
        await createMutation.mutateAsync(payload);
      } else if (resource) {
        await updateMutation.mutateAsync({ id: resource.id, data: payload });
      }

      void utils.resource.directory.invalidate();
      void utils.resource.listStaff.invalidate();
      onClose();
    } catch (err) {
      const message = err instanceof Error ? err.message : "An error occurred while saving.";
      setErrorMsg(message);
    }
  }

  const proficiencyLabels: Record<number, string> = {
    1: "1 – Beginner",
    2: "2 – Elementary",
    3: "3 – Intermediate",
    4: "4 – Advanced",
    5: "5 – Expert",
  };

  return (
    <div
      className="fixed inset-0 bg-black/50 z-50 flex items-start justify-center overflow-y-auto py-8"
      onClick={(e) => {
        if (e.target === e.currentTarget) onClose();
      }}
    >
      <div
        ref={panelRef}
        className="bg-white dark:bg-gray-800 rounded-xl shadow-2xl w-full max-w-2xl mx-4"
        onKeyDown={(e) => { if (e.key === "Escape") onClose(); }}
      >
        {/* Header */}
        <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200 dark:border-gray-700">
          <h2 className="text-lg font-semibold text-gray-900 dark:text-gray-100">
            {mode === "create" ? "New Resource" : "Edit Resource"}
          </h2>
          <button
            type="button"
            onClick={onClose}
            className="text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 transition-colors"
            aria-label="Close modal"
          >
            <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
              <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
            </svg>
          </button>
        </div>

        {/* Form */}
        <form onSubmit={handleSubmit} noValidate>
          <div className="px-6 pb-4">
            {/* Section 1: Basic Info */}
            <p className={SECTION_HEADER_CLASS}>Basic Info</p>

            <div className="grid grid-cols-2 gap-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-eid">
                  Employee ID <span className="text-red-500">*</span><InfoTooltip content="Unique employee identifier (e.g. EMP-042). Used for imports and cross-referencing." />
                </label>
                <input
                  id="rm-eid"
                  type="text"
                  className={INPUT_CLASS}
                  placeholder="EMP-042"
                  value={form.eid}
                  onChange={(e) => setField("eid", e.target.value)}
                  required
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-displayName">
                  Display Name <span className="text-red-500">*</span><InfoTooltip content="Full name shown in the timeline, reports, and staffing views." />
                </label>
                <input
                  id="rm-displayName"
                  type="text"
                  className={INPUT_CLASS}
                  placeholder="Jane Smith"
                  value={form.displayName}
                  onChange={(e) => setField("displayName", e.target.value)}
                  required
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-email">
                  Email <span className="text-red-500">*</span>
                </label>
                <input
                  id="rm-email"
                  type="email"
                  className={INPUT_CLASS}
                  placeholder="jane@example.com"
                  value={form.email}
                  onChange={(e) => setField("email", e.target.value)}
                  required
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-chapter">
                  Chapter <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span>
                </label>
                <input
                  id="rm-chapter"
                  type="text"
                  className={INPUT_CLASS}
                  placeholder="Engineering"
                  value={form.chapter}
                  onChange={(e) => setField("chapter", e.target.value)}
                />
              </div>
            </div>

            {/* Portfolio & Role */}
            <div className="grid grid-cols-2 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-portfolioUrl">
                  Portfolio URL <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span>
                </label>
                <input
                  id="rm-portfolioUrl"
                  type="url"
                  className={INPUT_CLASS}
                  placeholder="https://artstation.com/…"
                  value={form.portfolioUrl}
                  onChange={(e) => setField("portfolioUrl", e.target.value)}
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-roleId">
                  Area of Expertise <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span><InfoTooltip content="The resource's primary area role. Used for skill matrix grouping and AI summary generation." />
                </label>
                <select
                  id="rm-roleId"
                  className={INPUT_CLASS}
                  value={form.roleId}
                  onChange={(e) => setField("roleId", e.target.value)}
                >
                  <option value="">— Not specified —</option>
                  {roleOptions.map((r) => (
                    <option key={r.id} value={r.id}>{r.name}</option>
                  ))}
                </select>
              </div>
            </div>

            {/* Postal Code & Federal State */}
            <div className="grid grid-cols-2 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-postalCode">
                  Postal Code (PLZ) <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span><InfoTooltip content="German postal code. Used to auto-derive the federal state for public holiday calculations." />
                </label>
                <input
                  id="rm-postalCode"
                  type="text"
                  className={INPUT_CLASS}
                  placeholder="80331"
                  maxLength={5}
                  value={form.postalCode}
                  onChange={(e) => {
                    const plz = e.target.value;
                    setField("postalCode", plz);
                    if (/^\d{5}$/.test(plz)) {
                      const inferred = inferStateFromPostalCode(plz);
                      if (inferred && !form.federalState) {
                        setField("federalState", inferred);
                      }
                    }
                  }}
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-federalState">
                  Federal State <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span><InfoTooltip content="Determines which public holidays apply (e.g. Bavaria has extra holidays). Auto-derived from postal code." />
                </label>
                <select
                  id="rm-federalState"
                  className={INPUT_CLASS}
                  value={form.federalState}
                  onChange={(e) => setField("federalState", e.target.value)}
                >
                  <option value="">— Not specified —</option>
                  {Object.entries(GERMAN_FEDERAL_STATES).map(([abbr, name]) => (
                    <option key={abbr} value={abbr}>{name} ({abbr})</option>
                  ))}
                </select>
              </div>
            </div>

            {/* Section: Organization & Classification */}
            <p className={SECTION_HEADER_CLASS}>Organization &amp; Classification</p>

            <div className="grid grid-cols-2 gap-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-enterpriseId">
                  Enterprise ID <span className="text-gray-400 dark:text-gray-500 font-normal">(optional)</span><InfoTooltip content="Corporate directory ID for cross-system integration (e.g. a.kasperovich)." />
                </label>
                <input
                  id="rm-enterpriseId"
                  type="text"
                  className={INPUT_CLASS}
                  placeholder="a.kasperovich"
                  value={form.enterpriseId}
                  onChange={(e) => setField("enterpriseId", e.target.value)}
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-fte">
                  FTE<InfoTooltip content="Full-Time Equivalent (0.01-1.0). A value of 0.5 means the resource works 50% of standard hours." />
                </label>
                <input
                  id="rm-fte"
                  type="number"
                  min="0.01"
                  max="1"
                  step="0.01"
                  className={INPUT_CLASS}
                  placeholder="1.0"
                  value={form.fte}
                  onChange={(e) => setField("fte", e.target.value)}
                />
              </div>
            </div>

            <div className="grid grid-cols-2 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-countryId">Country</label>
                <select
                  id="rm-countryId"
                  className={INPUT_CLASS}
                  value={form.countryId}
                  onChange={(e) => {
                    setField("countryId", e.target.value);
                    setField("metroCityId", ""); // reset city when country changes
                  }}
                >
                  <option value="">— Not specified —</option>
                  {countryOptions.map((c) => (
                    <option key={c.id} value={c.id}>{c.name}</option>
                  ))}
                </select>
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-metroCityId">Metro City</label>
                <select
                  id="rm-metroCityId"
                  className={INPUT_CLASS}
                  value={form.metroCityId}
                  onChange={(e) => setField("metroCityId", e.target.value)}
                  disabled={!form.countryId}
                >
                  <option value="">— Not specified —</option>
                  {metroCities.map((c) => (
                    <option key={c.id} value={c.id}>{c.name}</option>
                  ))}
                </select>
              </div>
            </div>

            <div className="grid grid-cols-2 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-orgUnitId">Org Unit (L7 Team)</label>
                <select
                  id="rm-orgUnitId"
                  className={INPUT_CLASS}
                  value={form.orgUnitId}
                  onChange={(e) => setField("orgUnitId", e.target.value)}
                >
                  <option value="">— Not specified —</option>
                  {orgUnitOptions
                    .filter((u) => u.level === 7 && u.isActive)
                    .map((u) => (
                      <option key={u.id} value={u.id}>{u.name}</option>
                    ))}
                </select>
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-clientUnitId">Client Unit</label>
                <select
                  id="rm-clientUnitId"
                  className={INPUT_CLASS}
                  value={form.clientUnitId}
                  onChange={(e) => setField("clientUnitId", e.target.value)}
                >
                  <option value="">— Not specified —</option>
                  {clientOptions.map((c) => (
                    <option key={c.id} value={c.id}>{c.name}</option>
                  ))}
                </select>
              </div>
            </div>

            <div className="grid grid-cols-2 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-mgmtGroupId">Management Level Group<InfoTooltip content="Seniority grouping (e.g. Associate, Manager, Director). Determines the available management levels." /></label>
                <select
                  id="rm-mgmtGroupId"
                  className={INPUT_CLASS}
                  value={form.managementLevelGroupId}
                  onChange={(e) => {
                    setField("managementLevelGroupId", e.target.value);
                    setField("managementLevelId", ""); // reset level when group changes
                  }}
                >
                  <option value="">— Not specified —</option>
                  {managementGroupOptions.map((g) => (
                    <option key={g.id} value={g.id}>{g.name}</option>
                  ))}
                </select>
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-mgmtLevelId">Management Level<InfoTooltip content="Specific seniority level within the group. Used in chargeability reports and cost analysis." /></label>
                <select
                  id="rm-mgmtLevelId"
                  className={INPUT_CLASS}
                  value={form.managementLevelId}
                  onChange={(e) => setField("managementLevelId", e.target.value)}
                  disabled={!form.managementLevelGroupId}
                >
                  <option value="">— Not specified —</option>
                  {mgmtLevels.map((l) => (
                    <option key={l.id} value={l.id}>{l.name}</option>
                  ))}
                </select>
              </div>
            </div>

            <div className="grid grid-cols-4 gap-4 mt-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-resourceType">Resource Type<InfoTooltip content="Employee, contractor, or freelancer. Affects cost attribution rules." /></label>
                <select
                  id="rm-resourceType"
                  className={INPUT_CLASS}
                  value={form.resourceType}
                  onChange={(e) => setField("resourceType", e.target.value)}
                >
                  {Object.values(ResourceType).map((t) => (
                    <option key={t} value={t}>{t.charAt(0) + t.slice(1).toLowerCase()}</option>
                  ))}
                </select>
              </div>
              <div className="flex items-end pb-2">
                <label className="flex items-center gap-2 text-sm text-gray-700 dark:text-gray-300 cursor-pointer">
                  <input
                    type="checkbox"
                    checked={form.chgResponsibility}
                    onChange={(e) => setField("chgResponsibility", e.target.checked)}
                    className="rounded border-gray-300 text-brand-600 focus:ring-brand-500"
                  />
                  Chg Responsibility
                </label>
              </div>
              <div className="flex items-end pb-2">
                <label className="flex items-center gap-2 text-sm text-gray-700 dark:text-gray-300 cursor-pointer">
                  <input
                    type="checkbox"
                    checked={form.rolledOff}
                    onChange={(e) => setField("rolledOff", e.target.checked)}
                    className="rounded border-gray-300 text-brand-600 focus:ring-brand-500"
                  />
                  Rolled Off
                </label>
              </div>
              <div className="flex items-end pb-2">
                <label className="flex items-center gap-2 text-sm text-gray-700 dark:text-gray-300 cursor-pointer">
                  <input
                    type="checkbox"
                    checked={form.departed}
                    onChange={(e) => setField("departed", e.target.checked)}
                    className="rounded border-gray-300 text-brand-600 focus:ring-brand-500"
                  />
                  Departed
                </label>
              </div>
            </div>

            {/* Section 2: Cost & Chargeability */}
            <p className={SECTION_HEADER_CLASS}>Cost &amp; Chargeability</p>

            <div className="grid grid-cols-2 gap-4">
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-lcr">
                  LCR &euro;/h <span className="text-red-500">*</span><InfoTooltip content="Loaded Cost Rate in EUR per hour. E.g. 85 = 85.00 EUR/h. Stored internally as integer cents (8500)." />
                </label>
                <input
                  id="rm-lcr"
                  type="number"
                  min="0"
                  step="0.01"
                  className={INPUT_CLASS}
                  placeholder="80"
                  value={form.lcrEuros}
                  onChange={(e) => setField("lcrEuros", e.target.value)}
                  required
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-ucr">
                  UCR &euro;/h <span className="text-red-500">*</span><InfoTooltip content="Unit Cost Rate in EUR per hour. The rate billed to the project or client." />
                </label>
                <input
                  id="rm-ucr"
                  type="number"
                  min="0"
                  step="0.01"
                  className={INPUT_CLASS}
                  placeholder="120"
                  value={form.ucrEuros}
                  onChange={(e) => setField("ucrEuros", e.target.value)}
                  required
                />
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-currency">
                  Currency
                </label>
                <select
                  id="rm-currency"
                  className={INPUT_CLASS}
                  value={form.currency}
                  onChange={(e) => setField("currency", e.target.value)}
                >
                  <option value="EUR">EUR</option>
                  <option value="USD">USD</option>
                  <option value="GBP">GBP</option>
                </select>
              </div>
              <div>
                <label className={LABEL_CLASS} htmlFor="rm-chargeability">
                  Chargeability Target %<InfoTooltip content="Target % of working time on chargeable projects. E.g. 80 means 80% of hours should be billable." />
                </label>
                <input
                  id="rm-chargeability"
                  type="number"
                  min="0"
                  max="100"
                  className={INPUT_CLASS}
                  placeholder="80"
                  value={form.chargeabilityTarget}
                  onChange={(e) => setField("chargeabilityTarget", e.target.value)}
                />
              </div>
            </div>

            {/* Section 3: Weekly Availability */}
            <p className={SECTION_HEADER_CLASS}>Weekly Availability (hours/day)</p>

            <div className="grid grid-cols-5 gap-3">
              {(
                [
                  ["monday", "Mon"],
                  ["tuesday", "Tue"],
                  ["wednesday", "Wed"],
                  ["thursday", "Thu"],
                  ["friday", "Fri"],
                ] as const
              ).map(([day, label]) => (
                <div key={day}>
                  <label className={LABEL_CLASS} htmlFor={`rm-${day}`}>
                    {label}
                  </label>
                  <input
                    id={`rm-${day}`}
                    type="number"
                    min="0"
                    max="24"
                    step="0.5"
                    className={INPUT_CLASS}
                    value={form[day]}
                    onChange={(e) => setField(day, e.target.value)}
                  />
                </div>
              ))}
            </div>

            {/* Section 4: Skills */}
            <p className={SECTION_HEADER_CLASS}>Skills</p>

            <div className="space-y-3">
              {form.skills.map((skillRow, idx) => {
                const mainSkillCount = form.skills.filter((s) => s.isMainSkill).length;
                const canToggleMain = skillRow.isMainSkill || mainSkillCount < 2;
                return (
                  <div
                    key={idx}
                    className={`grid gap-2 items-end border rounded-lg p-3 ${skillRow.isMainSkill ? "border-amber-200 dark:border-amber-700 bg-amber-50 dark:bg-amber-900/20" : "border-gray-100 dark:border-gray-700 bg-gray-50 dark:bg-gray-900"}`}
                  >
                    <div className="grid grid-cols-[1fr_1fr_auto_auto_auto] gap-2 items-end">
                      <div>
                        <label className={LABEL_CLASS} htmlFor={`rm-skill-name-${idx}`}>
                          Skill
                        </label>
                        <input
                          id={`rm-skill-name-${idx}`}
                          type="text"
                          className={INPUT_CLASS}
                          placeholder="e.g. 3ds Max"
                          value={skillRow.skill}
                          onChange={(e) => setSkillField(idx, "skill", e.target.value)}
                        />
                      </div>
                      <div>
                        <label className={LABEL_CLASS} htmlFor={`rm-skill-prof-${idx}`}>
                          Proficiency
                        </label>
                        <select
                          id={`rm-skill-prof-${idx}`}
                          className={INPUT_CLASS}
                          value={skillRow.proficiency}
                          onChange={(e) =>
                            setSkillField(idx, "proficiency", parseInt(e.target.value, 10) as 1 | 2 | 3 | 4 | 5)
                          }
                        >
                          {[1, 2, 3, 4, 5].map((p) => (
                            <option key={p} value={p}>
                              {proficiencyLabels[p]}
                            </option>
                          ))}
                        </select>
                      </div>
                      <div>
                        <label className={LABEL_CLASS} htmlFor={`rm-skill-years-${idx}`}>
                          Years
                        </label>
                        <input
                          id={`rm-skill-years-${idx}`}
                          type="number"
                          min="0"
                          max="50"
                          step="1"
                          className={INPUT_CLASS}
                          placeholder="—"
                          value={skillRow.yearsExperience}
                          onChange={(e) => setSkillField(idx, "yearsExperience", e.target.value)}
                        />
                      </div>
                      <div className="flex flex-col items-center gap-1 pb-0.5">
                        <span className="text-[10px] text-gray-500 dark:text-gray-400 leading-none">★ Main</span>
                        <input
                          type="checkbox"
                          checked={skillRow.isMainSkill}
                          disabled={!canToggleMain}
                          title={!canToggleMain ? "Max 2 main skills" : "Mark as main skill"}
                          onChange={(e) => setSkillField(idx, "isMainSkill", e.target.checked)}
                          className="rounded border-gray-300 disabled:opacity-40"
                        />
                      </div>
                      <div className="flex items-end pb-0.5">
                        <button
                          type="button"
                          onClick={() => removeSkill(idx)}
                          className="px-2 py-2 text-red-400 hover:text-red-600 transition-colors"
                          aria-label={`Remove skill ${idx + 1}`}
                        >
                          <svg className="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
                            <path strokeLinecap="round" strokeLinejoin="round" d="M6 18L18 6M6 6l12 12" />
                          </svg>
                        </button>
                      </div>
                    </div>
                  </div>
                );
              })}

              <button
                type="button"
                onClick={addSkill}
                className="flex items-center gap-1.5 text-sm text-brand-600 hover:text-brand-800 font-medium transition-colors"
              >
                <svg className="w-4 h-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
                  <path strokeLinecap="round" strokeLinejoin="round" d="M12 4v16m8-8H4" />
                </svg>
                Add skill
              </button>
            </div>

            {/* Section 5: Roles */}
            <p className={SECTION_HEADER_CLASS}>Roles</p>

            <div className="space-y-2">
              {roleOptions.map((role) => {
                const assignment = form.roles.find((r) => r.roleId === role.id);
                const isChecked = Boolean(assignment);

                return (
                  <div key={role.id} className="flex items-center gap-3 py-1">
                    <input
                      type="checkbox"
                      id={`role-${role.id}`}
                      checked={isChecked}
                      onChange={(e) => {
                        if (e.target.checked) {
                          setField("roles", [...form.roles, { roleId: role.id, isPrimary: false }]);
                        } else {
                          setField("roles", form.roles.filter((r) => r.roleId !== role.id));
                        }
                      }}
                      className="rounded border-gray-300"
                    />
                    <div
                      className="w-3 h-3 rounded-full flex-shrink-0"
                      style={{ backgroundColor: role.color ?? "#6366f1" }}
                    />
                    <label htmlFor={`role-${role.id}`} className="text-sm text-gray-700 dark:text-gray-300 cursor-pointer flex-1">
                      {role.name}
                    </label>
                    {isChecked && (
                      <label className="flex items-center gap-1.5 text-xs text-gray-500 dark:text-gray-400 cursor-pointer">
                        <input
                          type="radio"
                          name="primary-role"
                          checked={assignment?.isPrimary ?? false}
                          onChange={() => {
                            setField("roles", form.roles.map((r) =>
                              r.roleId === role.id
                                ? { ...r, isPrimary: true }
                                : { ...r, isPrimary: false },
                            ));
                          }}
                          className="border-gray-300"
                        />
                        Primary
                      </label>
                    )}
                  </div>
                );
              })}
              {roleOptions.length === 0 && (
                <p className="text-sm text-gray-400 italic">No roles defined yet. Create roles on the Roles page.</p>
              )}
            </div>

            {/* Error message */}
            {errorMsg && (
              <div className="mt-4 rounded-lg bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-700 px-4 py-3 text-sm text-red-700 dark:text-red-400">
                {errorMsg}
              </div>
            )}
          </div>

          {/* Footer */}
          <div className="flex items-center justify-between gap-3 px-6 py-4 border-t border-gray-200 dark:border-gray-700 bg-gray-50 dark:bg-gray-900 rounded-b-xl">
            <div>
              {mode === "edit" && canManageUsers && resource && (
                confirmDelete ? (
                  <div className="flex items-center gap-2">
                    <span className="text-xs text-red-600 dark:text-red-400 font-medium">Permanently delete this resource?</span>
                    <button
                      type="button"
                      onClick={() => void hardDeleteMutation.mutateAsync({ id: resource.id })}
                      disabled={isMutating}
                      className="px-3 py-1.5 text-xs font-medium text-white bg-red-600 hover:bg-red-700 rounded-lg disabled:opacity-50 transition-colors"
                    >
                      {hardDeleteMutation.isPending ? "Deleting…" : "Yes, delete"}
                    </button>
                    <button
                      type="button"
                      onClick={() => setConfirmDelete(false)}
                      disabled={isMutating}
                      className="px-3 py-1.5 text-xs font-medium text-gray-600 dark:text-gray-400 hover:text-gray-800 dark:hover:text-gray-200 disabled:opacity-50"
                    >
                      Cancel
                    </button>
                  </div>
                ) : (
                  <button
                    type="button"
                    onClick={() => setConfirmDelete(true)}
                    disabled={isMutating}
                    className="px-3 py-1.5 text-xs font-medium text-red-600 dark:text-red-400 hover:text-red-800 dark:hover:text-red-200 border border-red-300 dark:border-red-700 rounded-lg disabled:opacity-50 transition-colors"
                  >
                    Delete Resource
                  </button>
                )
              )}
            </div>
            <div className="flex items-center gap-3">
              <button
                type="button"
                onClick={onClose}
                disabled={isMutating}
                className="px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded-lg hover:bg-gray-50 dark:hover:bg-gray-700 disabled:opacity-50 transition-colors"
              >
                Cancel
              </button>
              <button type="submit" disabled={isMutating} className={PRIMARY_BTN}>
                {isMutating && <Spinner />}
                {isMutating ? "Saving…" : "Save"}
              </button>
            </div>
          </div>
        </form>
      </div>
    </div>
  );
}
