/**
 * /database/api/groups/* 成员组管理端点(ADR-0038)。
 * 约定:绝对路径;actorOrNull 前置 fail closed;业务全走 memberGroupService;
 * 错误统一 sendRouteError。
 *
 * 管理端点(CRUD + 成员)由 service 层门禁到网站管理员;搜索端点不限管理员
 * (授权选择器是 Manage 持有者的能力,决策2)。
 */

import type { FastifyInstance } from "fastify";
import {
  addMember,
  createMemberGroup,
  deleteMemberGroup,
  listMemberGroups,
  listMembers,
  removeMember,
  restoreMemberGroup,
  searchMemberGroups,
  searchUsers,
  updateMemberGroup,
} from "../filelib/memberGroupService.js";
import { FileLibError } from "../filelib/model.js";
import {
  actorOrNull,
  bodyObject,
  optionalString,
  requireString,
  sendRouteError,
  type FileLibRouteDeps,
} from "../filelib/routeShared.js";

export async function registerMemberGroupRoutes(
  app: FastifyInstance,
  deps: FileLibRouteDeps,
): Promise<void> {
  const svc = { prisma: deps.prisma, organizationId: deps.organizationId };

  /* ------------------------------------------------------------ 搜索(授权选择器) */

  // 契约 C2 /groups/search:活跃组 + breadcrumb。**非管理员可调**(决策2)。
  // 注:必须先于 "/database/api/groups" 之类的段前缀之外单独成路径,Fastify
  // 静态路由不会 shadow,顺序无关;此处与其它端点平级注册。
  app.get("/database/api/groups/search", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const q = (request.query as { q?: string }).q ?? "";
      return { groups: await searchMemberGroups(svc, q) };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  // 成员选择器:搜全局用户。仅管理员(service 层门禁)。
  // excludeGroupId 过滤掉该组已有活跃成员。
  app.get("/database/api/users/search", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const query = request.query as { q?: string; excludeGroupId?: string };
      return { users: await searchUsers(svc, actor, query.q ?? "", query.excludeGroupId) };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  /* ------------------------------------------------------------ 组 CRUD */

  // includeArchived=1 时连已归档组一并返回(带 archivedAt),供后台展示/恢复。
  app.get("/database/api/groups", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const raw = (request.query as { includeArchived?: string }).includeArchived;
      const includeArchived = raw === "1" || raw === "true";
      return { groups: await listMemberGroups(svc, actor, includeArchived) };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  app.post("/database/api/groups", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const body = bodyObject(request.body);
      const parentIdRaw = body["parentId"];
      if (parentIdRaw !== undefined && parentIdRaw !== null && typeof parentIdRaw !== "string") {
        throw new FileLibError(400, "invalid_request", "parentId must be a string or null");
      }
      const group = await createMemberGroup(svc, actor, {
        name: requireString(body, "name"),
        description: optionalString(body, "description"),
        parentId: parentIdRaw === undefined ? null : parentIdRaw,
      });
      return reply.status(201).send({ group });
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  // 改名 / 改描述(决策6)。不接受 parentId —— reparent 仍不在 v1(决策5)。
  app.patch("/database/api/groups/:id", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id } = request.params as { id: string };
      const body = bodyObject(request.body);
      if (body["parentId"] !== undefined) {
        throw new FileLibError(400, "invalid_request", "reparent is not supported (ADR-0038)");
      }
      // description 需区分"未传"(不动)与 ""(清空),故不用 optionalString
      // (它把 "" 也归为 undefined)。
      const descRaw = body["description"];
      if (descRaw !== undefined && descRaw !== null && typeof descRaw !== "string") {
        throw new FileLibError(400, "invalid_request", "description must be a string");
      }
      const group = await updateMemberGroup(svc, actor, id, {
        name: optionalString(body, "name"),
        description: descRaw === undefined || descRaw === null ? undefined : descRaw,
      });
      return { group };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  app.delete("/database/api/groups/:id", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id } = request.params as { id: string };
      const result = await deleteMemberGroup(svc, actor, id);
      return { archivedCount: result.archivedCount };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  // 恢复(取消归档)。与删除不对称:只恢复该组 + 已归档祖先链,不动子树(决策7)。
  app.post("/database/api/groups/:id/restore", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id } = request.params as { id: string };
      const result = await restoreMemberGroup(svc, actor, id);
      return { restoredCount: result.restoredCount };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  /* ------------------------------------------------------------ 成员 */

  app.get("/database/api/groups/:id/members", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id } = request.params as { id: string };
      return { members: await listMembers(svc, actor, id) };
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  app.post("/database/api/groups/:id/members", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id } = request.params as { id: string };
      const body = bodyObject(request.body);
      const userId = optionalString(body, "userId");
      const feishuOpenId = optionalString(body, "feishuOpenId");
      if (userId === undefined && feishuOpenId === undefined) {
        throw new FileLibError(400, "invalid_request", "userId or feishuOpenId is required");
      }
      const member = await addMember(svc, actor, id, { userId, feishuOpenId });
      return reply.status(201).send({ member });
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });

  app.delete("/database/api/groups/:id/members/:userId", async (request, reply) => {
    const actor = await actorOrNull(request, reply, deps);
    if (actor === null) return reply;
    try {
      const { id, userId } = request.params as { id: string; userId: string };
      await removeMember(svc, actor, id, userId);
      return reply.status(204).send();
    } catch (error) {
      return sendRouteError(reply, error);
    }
  });
}