import { Router } from "express";
import { z } from 'zod';
import { storage } from "../storage";
import { authService } from "../services/auth.service";
import { authenticateToken, requirePermission, type AuthenticatedRequest } from "../middleware/auth.middleware";
import { tenantIsolation } from "../middleware/tenant.middleware";
import { validateRequest } from "../middleware/validation.middleware";
import {
  createUserCustomFieldSchema, updateUserCustomFieldSchema,
  setUserCustomValueSchema,
} from "@shared/schema";

export function registerUserManagementRoutes(router: Router): void {
  // === User Custom Fields routes ===

  router.get('/api/user-custom-fields',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const fields = await storage.getUserCustomFields(req.organizationId!);
        res.json({ success: true, fields });
      } catch (error) {
        console.error('Get user custom fields error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  router.post('/api/user-custom-fields',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    validateRequest(createUserCustomFieldSchema),
    async (req: AuthenticatedRequest, res) => {
      try {
        const existingFields = await storage.getUserCustomFields(req.organizationId!);
        if (existingFields.some(f => f.code === req.body.code)) {
          return res.status(400).json({ success: false, error: 'Поле с таким кодом уже существует' });
        }
        const field = await storage.createUserCustomField(req.organizationId!, req.body);
        res.status(201).json({ success: true, field });
      } catch (error) {
        console.error('Create user custom field error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  router.patch('/api/user-custom-fields/:id',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    validateRequest(updateUserCustomFieldSchema),
    async (req: AuthenticatedRequest, res) => {
      try {
        const id = parseInt(req.params.id);
        const existing = await storage.getUserCustomField(id, req.organizationId!);
        if (!existing) {
          return res.status(404).json({ success: false, error: 'Поле не найдено' });
        }
        if (req.body.code && req.body.code !== existing.code) {
          const allFields = await storage.getUserCustomFields(req.organizationId!);
          if (allFields.some(f => f.code === req.body.code && f.id !== id)) {
            return res.status(400).json({ success: false, error: 'Поле с таким кодом уже существует' });
          }
        }
        const field = await storage.updateUserCustomField(id, req.organizationId!, req.body);
        res.json({ success: true, field });
      } catch (error) {
        console.error('Update user custom field error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  router.delete('/api/user-custom-fields/:id',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const id = parseInt(req.params.id);
        await storage.deleteUserCustomField(id, req.organizationId!);
        res.json({ success: true, message: 'Поле удалено' });
      } catch (error) {
        console.error('Delete user custom field error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  router.post('/api/user-custom-fields/reorder',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const { fieldIds } = req.body;
        if (!Array.isArray(fieldIds)) {
          return res.status(400).json({ success: false, error: 'fieldIds должен быть массивом' });
        }
        await storage.reorderUserCustomFields(req.organizationId!, fieldIds);
        res.json({ success: true });
      } catch (error) {
        console.error('Reorder user custom fields error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  // Get custom values for a user
  router.get('/api/users/:userId/custom-values',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.userId);
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const appRole = req.user?.appRole;
        if (appRole !== 'admin' && req.user?.id !== userId) {
          return res.status(403).json({ success: false, error: 'Недостаточно прав' });
        }
        const values = await storage.getUserCustomValues(userId, req.organizationId!);
        res.json({ success: true, values });
      } catch (error) {
        console.error('Get user custom values error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  // Set custom values for a user (admin only, or self)
  router.put('/api/users/:userId/custom-values',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.userId);
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const appRole = req.user?.appRole;
        if (appRole !== 'admin' && req.user?.id !== userId) {
          return res.status(403).json({ success: false, error: 'Недостаточно прав' });
        }
        const { values } = req.body;
        if (!Array.isArray(values)) {
          return res.status(400).json({ success: false, error: 'values должен быть массивом' });
        }
        await storage.setUserCustomValues(userId, values, req.organizationId!);
        const updatedValues = await storage.getUserCustomValues(userId, req.organizationId!);
        res.json({ success: true, values: updatedValues });
      } catch (error) {
        console.error('Set user custom values error:', error);
        res.status(500).json({ success: false, error: 'Внутренняя ошибка сервера' });
      }
    }
  );

  // === User management routes ===

  // Public list endpoint — accessible to all org members (needed for chats, assignments, etc.)
  router.get('/api/users/list',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const users = await storage.getUsersByOrganization(req.organizationId!);
        const orgRoles = await storage.getRoles(req.organizationId!);

        let filtersObj: Record<string, string> = {};
        try { filtersObj = req.query.filters ? JSON.parse(req.query.filters as string) : {}; } catch {}
        const sortColumn = (req.query.sortColumn as string) || '';
        const sortDirection = (req.query.sortDirection as string) === 'desc' ? 'desc' : 'asc';

        // Build role membership map for all users
        const roleMembersMap = new Map<number, Array<{ id: number; name: string }>>();
        for (const r of orgRoles) {
          for (const m of r.members) {
            if (!roleMembersMap.has(m.userId)) roleMembersMap.set(m.userId, []);
            roleMembersMap.get(m.userId)!.push({ id: r.id, name: r.name });
          }
        }

        const getUserColVal = (u: any, col: string): string => {
          if (col === 'name') return `${u.firstName} ${u.middleName || ''} ${u.lastName}`.trim();
          if (col === 'email') return u.email || '';
          if (col === 'role') return u.appRole || '';
          if (col === 'status') return u.isActive ? 'Активен' : 'Неактивен';
          if (col === 'position') return u.position || '';
          return '';
        };

        let safeUsers = users.map(user => ({
          id: user.id,
          email: user.email,
          firstName: user.firstName,
          lastName: user.lastName,
          middleName: user.middleName,
          position: user.position,
          appRole: user.appRole,
          isActive: user.isActive,
          emailVerified: user.emailVerified,
          lastLogin: user.lastLogin,
          lastActivityAt: user.lastActivityAt,
          createdAt: user.createdAt,
          organizationalRoles: roleMembersMap.get(user.id) || [],
        }));

        Object.entries(filtersObj).forEach(([col, val]) => {
          if (!val) return;
          const valLower = (val as string).toLowerCase();
          safeUsers = safeUsers.filter(u => getUserColVal(u, col).toLowerCase().includes(valLower));
        });

        if (sortColumn) {
          safeUsers = safeUsers.sort((a, b) => {
            const av = getUserColVal(a, sortColumn).toLowerCase();
            const bv = getUserColVal(b, sortColumn).toLowerCase();
            const cmp = av.localeCompare(bv, 'ru');
            return sortDirection === 'asc' ? cmp : -cmp;
          });
        }

        res.json({ success: true, users: safeUsers });
      } catch (error) {
        console.error('Get users list error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении пользователей' });
      }
    }
  );

  // Admin-only user list (kept for backward compatibility with admin integrations)
  router.get('/api/users',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
    try {
      const users = await storage.getUsersByOrganization(req.organizationId!);
      const orgRoles = await storage.getRoles(req.organizationId!);

      let filtersObj: Record<string, string> = {};
      try { filtersObj = req.query.filters ? JSON.parse(req.query.filters as string) : {}; } catch {}
      const sortColumn = (req.query.sortColumn as string) || '';
      const sortDirection = (req.query.sortDirection as string) === 'desc' ? 'desc' : 'asc';

      // Build role membership map for all users
      const roleMembersMap = new Map<number, Array<{ id: number; name: string }>>();
      for (const r of orgRoles) {
        for (const m of r.members) {
          if (!roleMembersMap.has(m.userId)) roleMembersMap.set(m.userId, []);
          roleMembersMap.get(m.userId)!.push({ id: r.id, name: r.name });
        }
      }

      const getUserColVal = (u: any, col: string): string => {
        if (col === 'name') return `${u.firstName} ${u.middleName || ''} ${u.lastName}`.trim();
        if (col === 'email') return u.email || '';
        if (col === 'role') return u.appRole || '';
        if (col === 'status') return u.isActive ? 'Активен' : 'Неактивен';
        if (col === 'position') return u.position || '';
        return '';
      };

      let safeUsers = users.map(user => ({
        id: user.id,
        email: user.email,
        firstName: user.firstName,
        lastName: user.lastName,
        middleName: user.middleName,
        position: user.position,
        appRole: user.appRole,
        isActive: user.isActive,
        emailVerified: user.emailVerified,
        lastLogin: user.lastLogin,
        lastActivityAt: user.lastActivityAt,
        createdAt: user.createdAt,
        gpsAccess: user.gpsAccess,
        financeAccess: user.financeAccess,
        organizationalRoles: roleMembersMap.get(user.id) || [],
      }));

      Object.entries(filtersObj).forEach(([col, val]) => {
        if (!val) return;
        const valLower = (val as string).toLowerCase();
        safeUsers = safeUsers.filter(u => getUserColVal(u, col).toLowerCase().includes(valLower));
      });

      if (sortColumn) {
        safeUsers = safeUsers.sort((a, b) => {
          const av = getUserColVal(a, sortColumn).toLowerCase();
          const bv = getUserColVal(b, sortColumn).toLowerCase();
          const cmp = av.localeCompare(bv, 'ru');
          return sortDirection === 'asc' ? cmp : -cmp;
        });
      }

      res.json({ success: true, users: safeUsers });
    } catch (error) {
      console.error('Get users error:', error);
      res.status(500).json({ success: false, error: 'Ошибка при получении пользователей' });
    }
  });

  // PATCH /api/users/:id/module-access — флаги доступа к модулям GPS/Финансы (только admin)
  router.patch('/api/users/:id/module-access',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        if (req.user!.appRole !== 'admin') {
          return res.status(403).json({ success: false, error: 'Требуются права администратора' });
        }
        const userId = parseInt(req.params.id);
        if (isNaN(userId)) {
          return res.status(400).json({ success: false, error: 'Некорректный ID пользователя' });
        }

        const { gpsAccess, financeAccess } = req.body ?? {};
        const updates: { gpsAccess?: boolean; financeAccess?: boolean } = {};
        if (gpsAccess !== undefined) {
          if (typeof gpsAccess !== 'boolean') {
            return res.status(400).json({ success: false, error: 'gpsAccess: boolean' });
          }
          updates.gpsAccess = gpsAccess;
        }
        if (financeAccess !== undefined) {
          if (typeof financeAccess !== 'boolean') {
            return res.status(400).json({ success: false, error: 'financeAccess: boolean' });
          }
          updates.financeAccess = financeAccess;
        }
        if (Object.keys(updates).length === 0) {
          return res.status(400).json({ success: false, error: 'Передайте gpsAccess и/или financeAccess' });
        }

        // Tenant isolation: редактируем только пользователя своей организации
        const target = await storage.getUser(userId);
        if (!target || target.organizationId !== req.organizationId!) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }

        const updated = await storage.updateUser(userId, updates);
        res.json({
          success: true,
          user: { id: updated.id, gpsAccess: updated.gpsAccess, financeAccess: updated.financeAccess },
        });
      } catch (error) {
        console.error('Update user module access error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при обновлении доступа к модулям' });
      }
    });


  // Column values for users (autocomplete for filters)
  router.get('/api/users/column-values',
    async (req: AuthenticatedRequest, res) => {
      try {
        const column = (req.query.column as string) || '';
        const search = ((req.query.search as string) || '').toLowerCase();
        let context: Record<string, string> = {};
        try { context = req.query.context ? JSON.parse(req.query.context as string) : {}; } catch {}

        let users = await storage.getUsersByOrganization(req.organizationId!);

        const getUserColVal = (u: any, col: string): string => {
          if (col === 'name') return `${u.firstName} ${u.middleName || ''} ${u.lastName}`.trim();
          if (col === 'email') return u.email || '';
          if (col === 'role') return u.appRole || '';
          if (col === 'status') return u.isActive ? 'Активен' : 'Неактивен';
          if (col === 'position') return u.position || '';
          return '';
        };

        Object.entries(context).forEach(([col, val]) => {
          if (!val) return;
          const vl = (val as string).toLowerCase();
          users = users.filter(u => getUserColVal(u, col).toLowerCase().includes(vl));
        });

        const seen = new Set<string>();
        const values: string[] = [];
        for (const u of users) {
          const val = getUserColVal(u, column);
          if (!val || seen.has(val)) continue;
          if (search && !val.toLowerCase().includes(search)) continue;
          seen.add(val);
          values.push(val);
          if (values.length >= 20) break;
        }

        res.json({ values });
      } catch (error) {
        res.status(500).json({ error: 'Ошибка получения значений' });
      }
    }
  );

  router.post('/api/users',
    requirePermission('users.manage'),
    validateRequest(z.object({
      email: z.string().email('Неверный формат email'),
      firstName: z.string().min(1, 'Имя обязательно'),
      lastName: z.string().min(1, 'Фамилия обязательна'),
      middleName: z.string().optional(),
      position: z.string().optional(),
      appRole: z.string().min(1, 'Выберите роль доступа'),
      organizationalRoleIds: z.array(z.number()).optional(),
      sendInvite: z.boolean().default(true),
      statusId: z.union([z.number(), z.null()]).optional(),
      // Необязательный явный пароль; состав дополнительно проверяет hashPassword (400 с текстом правила)
      password: z.string().min(8, 'Пароль должен содержать минимум 8 символов').optional()
    })),
    async (req: AuthenticatedRequest, res) => {
      try {
        const result = await authService.createUser(req.organizationId!, {
          email: req.body.email,
          firstName: req.body.firstName,
          lastName: req.body.lastName,
          middleName: req.body.middleName,
          position: req.body.position,
          appRole: req.body.appRole,
          organizationalRoleIds: req.body.organizationalRoleIds,
          sendInvite: req.body.sendInvite,
          statusId: req.body.statusId ?? undefined,
          password: req.body.password
        });

        if (result.success && result.user) {
          res.status(201).json({
            success: true,
            message: result.message,
            user: {
              id: result.user.id,
              email: result.user.email,
              firstName: result.user.firstName,
              lastName: result.user.lastName,
              middleName: result.user.middleName,
              position: result.user.position,
              appRole: result.user.appRole,
              isActive: result.user.isActive,
              emailVerified: result.user.emailVerified,
              createdAt: result.user.createdAt
            }
          });
        } else {
          res.status(400).json({ success: false, error: result.error });
        }
      } catch (error) {
        console.error('Create user error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при создании пользователя' });
      }
    }
  );

  // Search users for @mentions (must be declared before /:id route)
  router.get('/api/users/search',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const { q: query, limit = '10' } = req.query;

        if (!query || typeof query !== 'string' || query.trim().length === 0) {
          return res.status(400).json({ success: false, error: 'Поисковый запрос обязателен' });
        }

        if (!req.organizationId || typeof req.organizationId !== 'number' || isNaN(req.organizationId)) {
          console.error('Invalid organizationId in search users:', req.organizationId);
          return res.status(400).json({ success: false, error: 'Ошибка идентификации организации' });
        }

        const searchLimit = Math.min(parseInt(limit as string) || 10, 20);
        const users = await storage.searchUsers(query.trim(), req.organizationId, searchLimit);

        res.json({
          success: true,
          users: users.map(user => ({
            id: user.id,
            firstName: user.firstName,
            lastName: user.lastName,
            email: user.email,
            position: user.position
          }))
        });
      } catch (error) {
        console.error('Search users error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при поиске пользователей' });
      }
    }
  );

  // Unified search for @mentions - returns both users and bots
  router.get('/api/mentions/search',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const { q: query, limit = '10' } = req.query;

        if (!query || typeof query !== 'string' || query.trim().length === 0) {
          return res.status(400).json({ success: false, error: 'Поисковый запрос обязателен' });
        }

        if (!req.organizationId || typeof req.organizationId !== 'number') {
          return res.status(400).json({ success: false, error: 'Ошибка идентификации организации' });
        }

        const searchLimit = Math.min(parseInt(limit as string) || 10, 20);
        const [users, allBots] = await Promise.all([
          storage.searchUsers(query.trim(), req.organizationId, searchLimit),
          storage.searchBots(query.trim(), req.organizationId, searchLimit)
        ]);

        const currentUser = req.user!;
        const bots = allBots.filter(bot => {
          const policy = bot.accessPolicy;
          if (!policy || policy.mode === 'all') return true;
          if (policy.mode === 'roles') {
            const roles = policy.roles ?? [];
            if (roles.length === 0) return false;
            return roles.includes(currentUser.appRole ?? '');
          }
          if (policy.mode === 'users') {
            const userIds = policy.userIds ?? [];
            if (userIds.length === 0) return false;
            return userIds.includes(currentUser.id);
          }
          return false;
        });

        const suggestions = [
          ...users.map(user => ({
            id: user.id,
            type: 'user' as const,
            name: `${user.firstName} ${user.middleName || ''} ${user.lastName}`.trim(),
            firstName: user.firstName,
            lastName: user.lastName,
            email: user.email,
            position: user.position
          })),
          ...bots.map(bot => ({
            id: bot.id,
            type: 'bot' as const,
            name: bot.name,
            firstName: bot.name,
            lastName: '',
            avatarUrl: bot.avatarUrl
          }))
        ].slice(0, searchLimit);

        res.json({ success: true, suggestions });
      } catch (error) {
        console.error('Search mentions error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при поиске' });
      }
    }
  );

  // === User offline subscriptions ===

  const subscriptionSchema = z.object({
    formId: z.number().int().positive(),
    isActive: z.boolean().optional(),
    includeRelatedTasks: z.boolean().optional(),
    includeFiles: z.boolean().optional(),
  });

  async function canManageUserSubscriptions(req: AuthenticatedRequest, targetUserId: number): Promise<boolean> {
    if (req.user!.id === targetUserId) return true;
    return storage.hasAppRolePermission(req.user!.appRole, ['users.manage']);
  }

  router.get('/api/users/:userId/offline-subscriptions',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.userId);
        if (isNaN(userId)) return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        if (!(await canManageUserSubscriptions(req, userId))) {
          return res.status(403).json({ success: false, error: 'Нет прав на просмотр подписок' });
        }
        const subscriptions = await storage.getUserOfflineSubscriptions(userId, req.organizationId!);
        res.json({ success: true, subscriptions });
      } catch (error: any) {
        console.error('Get offline subscriptions error:', error);
        res.status(500).json({ success: false, error: 'Ошибка загрузки подписок' });
      }
    }
  );

  router.post('/api/users/:userId/offline-subscriptions',
    authenticateToken,
    tenantIsolation,
    validateRequest(subscriptionSchema),
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.userId);
        if (isNaN(userId)) return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        if (!(await canManageUserSubscriptions(req, userId))) {
          return res.status(403).json({ success: false, error: 'Нет прав на управление подписками' });
        }

        const { formId, isActive, includeRelatedTasks, includeFiles } = req.body;
        const existing = await storage.getUserOfflineSubscription(userId, formId);
        const subscription = await storage.upsertUserOfflineSubscription({
          organizationId: req.organizationId!,
          userId,
          formId,
          isActive: isActive ?? existing?.isActive ?? true,
          includeRelatedTasks: includeRelatedTasks ?? existing?.includeRelatedTasks ?? true,
          includeFiles: includeFiles ?? existing?.includeFiles ?? false,
        });
        res.json({ success: true, subscription });
      } catch (error: any) {
        console.error('Upsert offline subscription error:', error);
        res.status(500).json({ success: false, error: 'Ошибка сохранения подписки' });
      }
    }
  );

  router.delete('/api/users/:userId/offline-subscriptions/:formId',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.userId);
        const formId = parseInt(req.params.formId);
        if (isNaN(userId) || isNaN(formId)) {
          return res.status(400).json({ success: false, error: 'Неверные параметры' });
        }
        if (!(await canManageUserSubscriptions(req, userId))) {
          return res.status(403).json({ success: false, error: 'Нет прав на управление подписками' });
        }
        await storage.deleteUserOfflineSubscription(userId, formId);
        res.json({ success: true });
      } catch (error: any) {
        console.error('Delete offline subscription error:', error);
        res.status(500).json({ success: false, error: 'Ошибка удаления подписки' });
      }
    }
  );
}