import {
  BlueprintTarget,
  CreateResourceSchema,
  PermissionKey,
  ResourceRoleSchema,
  UpdateResourceSchema,
  inferStateFromPostalCode,
} from "@capakraken/shared";
import { TRPCError } from "@trpc/server";
import { z } from "zod";
import { findUniqueOrThrow } from "../db/helpers.js";
import { ROLE_BRIEF_SELECT } from "../db/selects.js";
import { adminProcedure, managerProcedure, requirePermission } from "../trpc.js";
import {
  assertBlueprintDynamicFields,
  getAllowedDynamicFieldKeys,
} from "./blueprint-validation.js";

export const resourceMutationProcedures = {
  create: managerProcedure
    .input(CreateResourceSchema.extend({ roles: z.array(ResourceRoleSchema).optional() }))
    .mutation(async ({ ctx, input }) => {
      requirePermission(ctx, PermissionKey.MANAGE_RESOURCES);
      const existing = await ctx.db.resource.findFirst({
        where: { OR: [{ eid: input.eid }, { email: input.email }] },
      });

      if (existing) {
        throw new TRPCError({
          code: "CONFLICT",
          message: `Resource with EID "${input.eid}" or email "${input.email}" already exists`,
        });
      }

      await assertBlueprintDynamicFields({
        db: ctx.db,
        blueprintId: input.blueprintId,
        dynamicFields: input.dynamicFields,
        target: BlueprintTarget.RESOURCE,
      });

      const primaryCount = (input.roles ?? []).filter((role) => role.isPrimary).length;
      if (primaryCount > 1) {
        throw new TRPCError({
          code: "BAD_REQUEST",
          message: "A resource can have at most one primary role",
        });
      }

      const resource = await ctx.db.$transaction(async (tx) => {
        const created = await tx.resource.create({
          data: {
            eid: input.eid,
            displayName: input.displayName,
            email: input.email,
            chapter: input.chapter,
            lcrCents: input.lcrCents,
            ucrCents: input.ucrCents,
            currency: input.currency,
            chargeabilityTarget: input.chargeabilityTarget,
            availability: input.availability,
            skills: input.skills as unknown as import("@capakraken/db").Prisma.InputJsonValue,
            dynamicFields:
              input.dynamicFields as unknown as import("@capakraken/db").Prisma.InputJsonValue,
            blueprintId: input.blueprintId,
            portfolioUrl: input.portfolioUrl || undefined,
            roleId: input.roleId || undefined,
            ...(input.postalCode !== undefined ? { postalCode: input.postalCode } : {}),
            ...(input.postalCode && !input.federalState
              ? { federalState: inferStateFromPostalCode(input.postalCode) }
              : input.federalState !== undefined
                ? { federalState: input.federalState }
                : {}),
            ...(input.countryId !== undefined ? { countryId: input.countryId || null } : {}),
            ...(input.metroCityId !== undefined ? { metroCityId: input.metroCityId || null } : {}),
            ...(input.orgUnitId !== undefined ? { orgUnitId: input.orgUnitId || null } : {}),
            ...(input.managementLevelGroupId !== undefined
              ? { managementLevelGroupId: input.managementLevelGroupId || null }
              : {}),
            ...(input.managementLevelId !== undefined
              ? { managementLevelId: input.managementLevelId || null }
              : {}),
            ...(input.resourceType !== undefined ? { resourceType: input.resourceType } : {}),
            ...(input.chgResponsibility !== undefined
              ? { chgResponsibility: input.chgResponsibility }
              : {}),
            ...(input.rolledOff !== undefined ? { rolledOff: input.rolledOff } : {}),
            ...(input.departed !== undefined ? { departed: input.departed } : {}),
            ...(input.enterpriseId !== undefined
              ? { enterpriseId: input.enterpriseId || null }
              : {}),
            ...(input.clientUnitId !== undefined
              ? { clientUnitId: input.clientUnitId || null }
              : {}),
            ...(input.fte !== undefined ? { fte: input.fte } : {}),
            resourceRoles: input.roles?.length
              ? {
                  create: input.roles.map((role) => ({
                    roleId: role.roleId,
                    isPrimary: role.isPrimary,
                  })),
                }
              : undefined,
          } as unknown as Parameters<typeof tx.resource.create>[0]["data"],
          include: {
            resourceRoles: { include: { role: { select: ROLE_BRIEF_SELECT } } },
          },
        });

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: created.id,
            action: "CREATE",
            userId: ctx.dbUser?.id,
            changes: { after: created },
          } as unknown as Parameters<typeof tx.auditLog.create>[0]["data"],
        });

        return created;
      });

      return resource;
    }),

  update: managerProcedure
    .input(
      z.object({
        id: z.string(),
        data: UpdateResourceSchema.extend({ roles: z.array(ResourceRoleSchema).optional() }),
      }),
    )
    .mutation(async ({ ctx, input }) => {
      requirePermission(ctx, PermissionKey.MANAGE_RESOURCES);
      const existing = await findUniqueOrThrow(
        ctx.db.resource.findUnique({ where: { id: input.id } }),
        "Resource",
      );

      const nextBlueprintId = input.data.blueprintId ?? existing.blueprintId ?? undefined;
      const nextDynamicFields = (input.data.dynamicFields ??
        existing.dynamicFields ??
        {}) as Record<string, unknown>;

      await assertBlueprintDynamicFields({
        db: ctx.db,
        blueprintId: nextBlueprintId,
        dynamicFields: nextDynamicFields,
        target: BlueprintTarget.RESOURCE,
      });

      if (input.data.roles !== undefined) {
        const primaryCount = input.data.roles.filter((role) => role.isPrimary).length;
        if (primaryCount > 1) {
          throw new TRPCError({
            code: "BAD_REQUEST",
            message: "A resource can have at most one primary role",
          });
        }
      }

      const updated = await ctx.db.$transaction(async (tx) => {
        const result = await tx.resource.update({
          where: { id: input.id },
          data: {
            ...(input.data.displayName !== undefined
              ? { displayName: input.data.displayName }
              : {}),
            ...(input.data.email !== undefined ? { email: input.data.email } : {}),
            ...(input.data.chapter !== undefined ? { chapter: input.data.chapter } : {}),
            ...(input.data.lcrCents !== undefined ? { lcrCents: input.data.lcrCents } : {}),
            ...(input.data.ucrCents !== undefined ? { ucrCents: input.data.ucrCents } : {}),
            ...(input.data.currency !== undefined ? { currency: input.data.currency } : {}),
            ...(input.data.chargeabilityTarget !== undefined
              ? { chargeabilityTarget: input.data.chargeabilityTarget }
              : {}),
            ...(input.data.availability !== undefined
              ? {
                  availability: input.data
                    .availability as unknown as import("@capakraken/db").Prisma.InputJsonValue,
                }
              : {}),
            ...(input.data.skills !== undefined
              ? {
                  skills: input.data
                    .skills as unknown as import("@capakraken/db").Prisma.InputJsonValue,
                }
              : {}),
            ...(input.data.dynamicFields !== undefined
              ? {
                  dynamicFields: input.data
                    .dynamicFields as unknown as import("@capakraken/db").Prisma.InputJsonValue,
                }
              : {}),
            ...(input.data.blueprintId !== undefined
              ? { blueprintId: input.data.blueprintId }
              : {}),
            ...(input.data.isActive !== undefined ? { isActive: input.data.isActive } : {}),
            ...(input.data.portfolioUrl !== undefined
              ? { portfolioUrl: input.data.portfolioUrl || null }
              : {}),
            ...(input.data.roleId !== undefined ? { roleId: input.data.roleId || null } : {}),
            ...(input.data.postalCode !== undefined ? { postalCode: input.data.postalCode } : {}),
            ...(input.data.postalCode && !input.data.federalState
              ? { federalState: inferStateFromPostalCode(input.data.postalCode) }
              : input.data.federalState !== undefined
                ? { federalState: input.data.federalState }
                : {}),
            ...(input.data.countryId !== undefined
              ? { countryId: input.data.countryId || null }
              : {}),
            ...(input.data.metroCityId !== undefined
              ? { metroCityId: input.data.metroCityId || null }
              : {}),
            ...(input.data.orgUnitId !== undefined
              ? { orgUnitId: input.data.orgUnitId || null }
              : {}),
            ...(input.data.managementLevelGroupId !== undefined
              ? { managementLevelGroupId: input.data.managementLevelGroupId || null }
              : {}),
            ...(input.data.managementLevelId !== undefined
              ? { managementLevelId: input.data.managementLevelId || null }
              : {}),
            ...(input.data.resourceType !== undefined
              ? { resourceType: input.data.resourceType }
              : {}),
            ...(input.data.chgResponsibility !== undefined
              ? { chgResponsibility: input.data.chgResponsibility }
              : {}),
            ...(input.data.rolledOff !== undefined ? { rolledOff: input.data.rolledOff } : {}),
            ...(input.data.departed !== undefined ? { departed: input.data.departed } : {}),
            ...(input.data.enterpriseId !== undefined
              ? { enterpriseId: input.data.enterpriseId || null }
              : {}),
            ...(input.data.clientUnitId !== undefined
              ? { clientUnitId: input.data.clientUnitId || null }
              : {}),
            ...(input.data.fte !== undefined ? { fte: input.data.fte } : {}),
          } as unknown as Parameters<typeof tx.resource.update>[0]["data"],
          include: {
            resourceRoles: { include: { role: { select: ROLE_BRIEF_SELECT } } },
          },
        });

        if (input.data.roles !== undefined) {
          await tx.resourceRole.deleteMany({ where: { resourceId: input.id } });
          if (input.data.roles.length > 0) {
            await tx.resourceRole.createMany({
              data: input.data.roles.map((role) => ({
                resourceId: input.id,
                roleId: role.roleId,
                isPrimary: role.isPrimary,
              })),
            });
          }
        }

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: input.id,
            action: "UPDATE",
            changes: { before: existing, after: result },
          },
        });

        return result;
      });

      return updated;
    }),

  deactivate: managerProcedure
    .input(z.object({ id: z.string() }))
    .mutation(async ({ ctx, input }) => {
      requirePermission(ctx, PermissionKey.MANAGE_RESOURCES);
      const resource = await ctx.db.$transaction(async (tx) => {
        const result = await tx.resource.update({
          where: { id: input.id },
          data: { isActive: false, deletedAt: new Date() },
        });

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: input.id,
            action: "UPDATE",
            changes: { after: { isActive: false } },
          },
        });

        return result;
      });

      return resource;
    }),

  batchDeactivate: managerProcedure
    .input(z.object({ ids: z.array(z.string()).min(1).max(100) }))
    .mutation(async ({ ctx, input }) => {
      requirePermission(ctx, PermissionKey.MANAGE_RESOURCES);
      const updated = await ctx.db.$transaction(async (tx) => {
        const results = await Promise.all(
          input.ids.map((id) =>
            tx.resource.update({ where: { id }, data: { isActive: false, deletedAt: new Date() } }),
          ),
        );

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: input.ids.join(","),
            action: "UPDATE",
            changes: { after: { isActive: false, ids: input.ids } },
          },
        });

        return results;
      });

      return { count: updated.length };
    }),

  batchUpdateCustomFields: managerProcedure
    .input(
      z.object({
        ids: z.array(z.string()).min(1).max(100),
        fields: z
          .record(
            z.string().min(1).max(128),
            z.union([z.string().max(8_000), z.number(), z.boolean(), z.null()]),
          )
          .refine((r) => Object.keys(r).length <= 100, {
            message: "Too many custom-field keys in one batch (max 100)",
          }),
      }),
    )
    .mutation(async ({ ctx, input }) => {
      requirePermission(ctx, PermissionKey.MANAGE_RESOURCES);

      // Whitelist input keys against the union of (each resource's blueprint
      // field defs) ∪ (all active global RESOURCE blueprints). Rejects any key
      // that is not explicitly defined for every target resource — blocks
      // namespace pollution and privilege escalation via admin-tool
      // interpretation of attacker-placed JSONB keys.
      const resources = await ctx.db.resource.findMany({
        where: { id: { in: input.ids } },
        select: { id: true, blueprintId: true },
      });
      if (resources.length !== input.ids.length) {
        throw new TRPCError({ code: "NOT_FOUND", message: "One or more resources not found" });
      }

      const inputKeys = Object.keys(input.fields);
      for (const resource of resources) {
        const allowed = await getAllowedDynamicFieldKeys({
          db: ctx.db,
          blueprintId: resource.blueprintId ?? undefined,
          target: BlueprintTarget.RESOURCE,
        });
        // If no blueprint at all is registered for this resource, `allowed` is
        // empty — we still enforce the whitelist to refuse any key rather than
        // silently accepting arbitrary JSONB. This is stricter than the legacy
        // create/update paths but correct for a bulk endpoint.
        const unknownKey = inputKeys.find((k) => !allowed.has(k));
        if (unknownKey !== undefined) {
          throw new TRPCError({
            code: "UNPROCESSABLE_CONTENT",
            message: `Unknown dynamic-field key "${unknownKey}" for resource ${resource.id}`,
          });
        }
        // Still validate values via the existing per-key typed validator.
        await assertBlueprintDynamicFields({
          db: ctx.db,
          blueprintId: resource.blueprintId ?? undefined,
          dynamicFields: input.fields,
          target: BlueprintTarget.RESOURCE,
        });
      }

      await ctx.db.$transaction(async (tx) => {
        await Promise.all(
          input.ids.map(
            (id) =>
              tx.$executeRaw`
              UPDATE "Resource"
              SET "dynamicFields" = "dynamicFields" || ${JSON.stringify(input.fields)}::jsonb
              WHERE id = ${id}
            `,
          ),
        );

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: input.ids.join(","),
            action: "UPDATE",
            changes: {
              after: { dynamicFields: input.fields, ids: input.ids },
            } as unknown as import("@capakraken/db").Prisma.InputJsonValue,
          },
        });
      });

      return { updated: input.ids.length };
    }),

  hardDelete: adminProcedure
    .input(z.object({ id: z.string() }))
    .mutation(async ({ ctx, input }) => {
      const resource = await ctx.db.resource.findUnique({
        where: { id: input.id },
        select: { id: true, displayName: true, eid: true },
      });
      if (!resource) {
        throw new TRPCError({ code: "NOT_FOUND", message: "Resource not found" });
      }

      await ctx.db.$transaction(async (tx) => {
        await tx.assignment.deleteMany({ where: { resourceId: input.id } });
        await tx.vacation.deleteMany({ where: { resourceId: input.id } });
        await tx.resource.delete({ where: { id: input.id } });

        await tx.auditLog.create({
          data: {
            entityType: "Resource",
            entityId: input.id,
            action: "DELETE",
            userId: ctx.dbUser?.id,
            changes: {
              before: resource,
            } as unknown as import("@capakraken/db").Prisma.InputJsonValue,
          },
        });
      });

      return { deleted: true };
    }),

  batchHardDelete: adminProcedure
    .input(z.object({ ids: z.array(z.string().max(64)).min(1).max(500) }))
    .mutation(async ({ ctx, input }) => {
      const resources = await ctx.db.resource.findMany({
        where: { id: { in: input.ids } },
        select: { id: true, displayName: true, eid: true },
      });

      await ctx.db.$transaction(async (tx) => {
        await tx.assignment.deleteMany({ where: { resourceId: { in: input.ids } } });
        await tx.vacation.deleteMany({ where: { resourceId: { in: input.ids } } });
        await tx.resource.deleteMany({ where: { id: { in: input.ids } } });

        await tx.auditLog.createMany({
          data: resources.map((r) => ({
            entityType: "Resource",
            entityId: r.id,
            action: "DELETE",
            userId: ctx.dbUser?.id,
            changes: { before: r } as unknown as import("@capakraken/db").Prisma.InputJsonValue,
          })),
        });
      });

      return { deleted: resources.length };
    }),
};