"use client";

import { useMemo } from "react";
import Link from "next/link";
import { trpc } from "~/lib/trpc/client.js";
import type { WidgetProps } from "~/components/dashboard/widget-registry.js";
import { InfoTooltip } from "~/components/ui/InfoTooltip.js";
import { ShoringBadge } from "~/components/projects/ShoringIndicator.js";
import { WidgetFilterBar, type WidgetFilter } from "~/components/dashboard/WidgetFilterBar.js";
import { useWidgetFilterOptions } from "~/hooks/useWidgetFilterOptions.js";

function healthDot(value: number): string {
  if (value >= 70) return "bg-green-500";
  if (value >= 40) return "bg-amber-400";
  return "bg-red-500";
}

function scoreBadge(score: number): string {
  if (score >= 70) return "bg-green-100 text-green-700 dark:bg-green-900/40 dark:text-green-300";
  if (score >= 40) return "bg-amber-100 text-amber-700 dark:bg-amber-900/40 dark:text-amber-300";
  return "bg-red-100 text-red-700 dark:bg-red-900/40 dark:text-red-300";
}

export function ProjectHealthWidget({ config, onConfigChange }: WidgetProps) {
  const { clients } = useWidgetFilterOptions();

  const filters = useMemo<WidgetFilter[]>(
    () => [
      { type: "search", key: "search", placeholder: "Search project..." },
      { type: "select", key: "clientId", label: "Client", options: clients },
    ],
    [clients],
  );

  const { data, isLoading } = trpc.dashboard.getProjectHealth.useQuery(
    undefined,
    { staleTime: 60_000, placeholderData: (prev) => prev },
  );

  const search = ((config.search as string) ?? "").toLowerCase();
  const clientId = (config.clientId as string) ?? "";

  const rows = useMemo(() => {
    const all = data ?? [];
    return all.filter((r) => {
      if (search && !r.projectName.toLowerCase().includes(search) && !r.shortCode.toLowerCase().includes(search)) return false;
      if (clientId && r.clientId !== clientId) return false;
      return true;
    });
  }, [data, search, clientId]);

  if (isLoading && !data) {
    return (
      <div className="flex flex-col gap-1 pt-1">
        {[...Array(5)].map((_, i) => (
          <div key={i} className="flex items-center gap-3 px-3 py-2">
            <div className="h-3 w-16 shimmer-skeleton rounded" />
            <div className="h-3 flex-1 shimmer-skeleton rounded" />
            <div className="flex gap-1">
              <div className="h-4 w-4 shimmer-skeleton rounded-full" />
              <div className="h-4 w-4 shimmer-skeleton rounded-full" />
              <div className="h-4 w-4 shimmer-skeleton rounded-full" />
            </div>
            <div className="h-5 w-10 shimmer-skeleton rounded-full" />
          </div>
        ))}
      </div>
    );
  }

  if (rows.length === 0) {
    return (
      <div className="flex flex-col h-full">
        <WidgetFilterBar filters={filters} values={config} onChange={onConfigChange ?? (() => {})} />
        <div className="flex items-center justify-center flex-1 text-sm text-gray-400">
          No active projects found.
        </div>
      </div>
    );
  }

  return (
    <div className="flex flex-col h-full overflow-hidden">
      <WidgetFilterBar filters={filters} values={config} onChange={onConfigChange ?? (() => {})} />
      <div className="overflow-auto flex-1">
        <table className="w-full text-xs">
          <thead className="bg-gray-50 dark:bg-gray-800/50 sticky top-0">
            <tr>
              <th className="px-3 py-2 text-left font-medium text-gray-500 dark:text-gray-400">
                Project <InfoTooltip content="Active projects scored across three health dimensions" />
              </th>
              <th className="px-3 py-2 text-center font-medium text-gray-500 dark:text-gray-400">
                B / S / T <InfoTooltip content="Budget health (spent vs budget), Staffing health (filled vs total demands), Timeline health (within end date)" />
              </th>
              <th className="px-3 py-2 text-center font-medium text-gray-500 dark:text-gray-400">
                Shoring <InfoTooltip content="Offshore staffing ratio: percentage of hours from non-onshore resources. Color indicates threshold status." />
              </th>
              <th className="px-3 py-2 text-right font-medium text-gray-500 dark:text-gray-400">
                Score <InfoTooltip content="Composite score: average of Budget, Staffing, and Timeline health (0-100)" />
              </th>
            </tr>
          </thead>
          <tbody className="divide-y divide-gray-100 dark:divide-gray-800">
            {rows.map((row) => (
              <tr key={row.shortCode} className="hover:bg-gray-50 dark:hover:bg-gray-800/30">
                <td className="px-3 py-2 font-medium text-gray-900 dark:text-gray-100 max-w-[160px] truncate">
                  <Link href={`/projects/${(row as any).id}`} className="hover:text-brand-600 dark:hover:text-brand-400 transition-colors">
                    <span className="font-mono text-gray-500 dark:text-gray-400 mr-1">{row.shortCode}</span>
                    {row.projectName}
                  </Link>
                </td>
                <td className="px-3 py-2">
                  <div className="flex items-center justify-center gap-2">
                    <span
                      className={`inline-block w-3 h-3 rounded-full ${healthDot(row.budgetHealth)}`}
                      title={`Budget: ${row.budgetHealth}%`}
                    />
                    <span
                      className={`inline-block w-3 h-3 rounded-full ${healthDot(row.staffingHealth)}`}
                      title={`Staffing: ${row.staffingHealth}%`}
                    />
                    <span
                      className={`inline-block w-3 h-3 rounded-full ${healthDot(row.timelineHealth)}`}
                      title={`Timeline: ${row.timelineHealth}%`}
                    />
                  </div>
                </td>
                <td className="px-3 py-2 text-center">
                  <ShoringBadge projectId={(row as any).id} />
                </td>
                <td className="px-3 py-2 text-right">
                  <span
                    className={`inline-block px-2 py-0.5 rounded-full font-semibold tabular-nums ${scoreBadge(row.compositeScore)}`}
                  >
                    {row.compositeScore}
                  </span>
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  );
}