import { Router } from "express";
import { storage } from "../storage";
import { authenticateToken, requirePermission, type AuthenticatedRequest } from "../middleware/auth.middleware";
import { tenantIsolation } from "../middleware/tenant.middleware";
import { isValidFieldType } from "@shared/field-types";
import { canManageUser } from "../utils/user-access";

export function registerUserProfileRoutes(router: Router): void {
  // === USER PROFILE TABS ===
  router.get('/api/user-profile/tabs',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const tabs = await storage.getUserProfileTabs(req.organizationId!);
        res.json({ success: true, tabs });
      } catch (error) {
        console.error('Get user profile tabs error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении вкладок профиля' });
      }
    }
  );

  router.post('/api/user-profile/tabs',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const { tabs } = req.body;
        if (!Array.isArray(tabs)) {
          return res.status(400).json({ success: false, error: 'Вкладки должны быть массивом' });
        }
        const savedTabs = await storage.bulkSaveUserProfileTabs(req.organizationId!, tabs);
        res.json({ success: true, tabs: savedTabs, message: 'Вкладки сохранены' });
      } catch (error) {
        console.error('Save user profile tabs error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при сохранении вкладок профиля' });
      }
    }
  );

  // === USER PROFILE FIELDS ===
  router.get('/api/user-profile/fields',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const fields = await storage.getUserProfileFields(req.organizationId!);
        res.json({ success: true, fields });
      } catch (error) {
        console.error('Get user profile fields error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении полей профиля' });
      }
    }
  );

  router.post('/api/user-profile/fields',
    authenticateToken,
    tenantIsolation,
    requirePermission('users.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const { fields } = req.body;
        if (!Array.isArray(fields)) {
          return res.status(400).json({ success: false, error: 'Поля должны быть массивом' });
        }

        const existingFields = await storage.getUserProfileFields(req.organizationId!);
        const incomingIds = fields.filter((f: Record<string, unknown>) => f.id).map((f: Record<string, unknown>) => f.id as number);
        const fieldsToDelete = existingFields.filter(existing => !incomingIds.includes(existing.id));

        // Check if fields to delete are in use
        if (fieldsToDelete.length > 0) {
          const allUsers = await storage.getUsersByOrganization(req.organizationId!);
          const usedFieldIds = new Set<number>();
          for (const user of allUsers) {
            const values = await storage.getUserProfileFieldValues(user.id);
            for (const value of values) {
              usedFieldIds.add(value.fieldId);
            }
          }
          for (const field of fieldsToDelete) {
            if (usedFieldIds.has(field.id)) {
              return res.status(400).json({
                success: false,
                error: `Невозможно удалить поле "${field.name}" - оно используется в профилях пользователей. Сначала удалите значения этого поля во всех профилях.`
              });
            }
          }
        }

        const fieldIdsToDelete = fieldsToDelete.map(f => f.id);
        const normalizedFields = fields.map((f: Record<string, unknown>) => ({
          ...f,
          maxFileCount: f.maxFileCount != null && parseInt(String(f.maxFileCount)) > 0 ? parseInt(String(f.maxFileCount)) : null,
          maxFileSizeMB: f.maxFileSizeMB != null && parseInt(String(f.maxFileSizeMB)) > 0 ? parseInt(String(f.maxFileSizeMB)) : null,
        }));

        // Validate field types for new fields
        for (const field of fields as Array<Record<string, unknown>>) {
          const fieldId = field.id as number | undefined;
          const isNew = !fieldId || (typeof fieldId === 'number' && fieldId < 0);
          const fieldType = field.type as string;
          if (isNew && fieldType && !isValidFieldType(fieldType, 'user')) {
            return res.status(400).json({
              success: false,
              error: `Тип поля "${fieldType}" нельзя использовать в профиле пользователя.`,
            });
          }
        }

        const resultFields = await storage.bulkSaveUserProfileFields(
          req.organizationId!,
          fieldIdsToDelete,
          normalizedFields as Parameters<typeof storage.bulkSaveUserProfileFields>[2]
        );

        res.status(201).json({ success: true, message: 'Поля сохранены', fields: resultFields });
      } catch (error) {
        console.error('Save user profile fields error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при сохранении полей профиля' });
      }
    }
  );

  // === USER PROFILE DETAIL ===
  router.get('/api/users/:id/profile',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        if (isNaN(userId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        }
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const detail = await storage.getUserProfileDetail(userId, req.organizationId!);
        const canEdit = await canManageUser(req.user, userId, req.organizationId!) || req.user?.id === userId;
        res.json({ success: true, ...detail, canEdit });
      } catch (error) {
        console.error('Get user profile detail error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении профиля пользователя' });
      }
    }
  );

  // === USER PROFILE AUDIT LOG ===
  router.get('/api/users/:id/profile/audit-log',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        if (isNaN(userId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        }
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const canView = await canManageUser(req.user, userId, req.organizationId!) || req.user?.id === userId;
        if (!canView) {
          return res.status(403).json({ success: false, error: 'Недостаточно прав' });
        }
        const auditLog = await storage.getUserProfileAuditLog(userId, req.organizationId!);
        res.json({ success: true, auditLog });
      } catch (error) {
        console.error('Get user profile audit log error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении истории изменений' });
      }
    }
  );

  // === USER FIELD HISTORY (history-number) ===
  const FIELD_HISTORY_PERIODS: Record<string, { days: number; bucket: 'day' | 'week' | 'month' }> = {
    week: { days: 7, bucket: 'day' },
    month: { days: 30, bucket: 'day' },
    quarter: { days: 90, bucket: 'week' },
    year: { days: 365, bucket: 'month' },
  };

  router.get('/api/users/:id/field-history/:fieldId',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        const fieldId = parseInt(req.params.fieldId);
        if (isNaN(userId) || isNaN(fieldId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID' });
        }
        // Права — как у просмотра профиля: любой сотрудник той же организации
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const field = await storage.getUserProfileFieldById(fieldId, req.organizationId!);
        if (!field || field.type !== 'history-number') {
          return res.status(404).json({ success: false, error: 'Поле не найдено' });
        }
        const periodParam = String(req.query.period || 'month');
        const period = FIELD_HISTORY_PERIODS[periodParam];
        if (!period) {
          return res.status(400).json({ success: false, error: 'Неверный период. Допустимо: week, month, quarter, year' });
        }
        const { points, overallAvg, totalCount } = await storage.getUserFieldHistoryPoints(
          userId,
          fieldId,
          req.organizationId!,
          period.days,
          period.bucket
        );
        res.json({
          success: true,
          field: { id: field.id, name: field.name },
          period: periodParam,
          points,
          overallAvg,
          totalCount,
        });
      } catch (error) {
        console.error('Get user field history error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении истории поля' });
      }
    }
  );

  // === USER PROFILE FIELD VALUES ===
  router.get('/api/users/:id/field-values',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        if (isNaN(userId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        }
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const values = await storage.getUserProfileFieldValues(userId);
        res.json({ success: true, fieldValues: values });
      } catch (error) {
        console.error('Get user profile field values error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении значений полей' });
      }
    }
  );

  router.post('/api/users/:id/field-values',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        if (isNaN(userId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID пользователя' });
        }
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const canEdit = await canManageUser(req.user, userId, req.organizationId!) || req.user?.id === userId;
        if (!canEdit) {
          return res.status(403).json({ success: false, error: 'Недостаточно прав' });
        }

        const { fieldValues } = req.body;
        if (!Array.isArray(fieldValues)) {
          return res.status(400).json({ success: false, error: 'Значения полей должны быть массивом' });
        }

        const changedBy = req.user!.id;
        const createdValues = [];
        for (const fv of fieldValues) {
          const existing = await storage.getUserProfileFieldValue(userId, fv.fieldId);
          if (fv.value === null || fv.value === undefined) {
            if (existing) {
              await storage.deleteUserProfileFieldValueWithAudit(userId, fv.fieldId, req.organizationId!, changedBy);
            }
          } else {
            if (existing) {
              const updated = await storage.updateUserProfileFieldValueWithAudit(userId, fv.fieldId, { value: fv.value }, req.organizationId!, changedBy);
              createdValues.push(updated);
            } else {
              const created = await storage.createUserProfileFieldValueWithAudit({
                userId,
                fieldId: fv.fieldId,
                value: fv.value,
              }, req.organizationId!, changedBy);
              createdValues.push(created);
            }
          }
        }

        res.json({ success: true, fieldValues: createdValues });
      } catch (error) {
        console.error('Save user profile field values error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при сохранении значений полей' });
      }
    }
  );

  router.patch('/api/users/:id/field-values/:fieldId',
    authenticateToken,
    tenantIsolation,
    async (req: AuthenticatedRequest, res) => {
      try {
        const userId = parseInt(req.params.id);
        const fieldId = parseInt(req.params.fieldId);
        if (isNaN(userId) || isNaN(fieldId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID' });
        }
        const targetUser = await storage.getUser(userId);
        if (!targetUser || targetUser.organizationId !== req.organizationId) {
          return res.status(404).json({ success: false, error: 'Пользователь не найден' });
        }
        const canEdit = await canManageUser(req.user, userId, req.organizationId!) || req.user?.id === userId;
        if (!canEdit) {
          return res.status(403).json({ success: false, error: 'Недостаточно прав' });
        }

        const changedBy = req.user!.id;
        const { value } = req.body;
        const existing = await storage.getUserProfileFieldValue(userId, fieldId);
        if (value === null || value === undefined) {
          if (existing) {
            await storage.deleteUserProfileFieldValueWithAudit(userId, fieldId, req.organizationId!, changedBy);
          }
          res.json({ success: true, fieldValue: null });
        } else {
          if (existing) {
            const updated = await storage.updateUserProfileFieldValueWithAudit(userId, fieldId, { value }, req.organizationId!, changedBy);
            res.json({ success: true, fieldValue: updated });
          } else {
            const created = await storage.createUserProfileFieldValueWithAudit({ userId, fieldId, value }, req.organizationId!, changedBy);
            res.json({ success: true, fieldValue: created });
          }
        }
      } catch (error) {
        console.error('Patch user profile field value error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при обновлении значения поля' });
      }
    }
  );
}