import { Router } from "express";
import { storage } from "../storage";
import { requireFormAdminOrPermission, type AuthenticatedRequest } from "../middleware/auth.middleware";
import { formsCache } from "../utils/cache";
import { indexFormWithSummaryAsync } from "./task-helpers";
import { type Task } from "@shared/schema";

export function registerFormStatusRoutes(router: ReturnType<typeof import("express").Router>): void {
  // === FORM STATUSES ENDPOINTS ===

  /**
   * @swagger
   * /api/forms/{id}/statuses:
   *   get:
   *     tags: [Forms]
   *     summary: Статусы формы
   *   post:
   *     tags: [Forms]
   *     summary: Создать статус
   */
  router.get('/api/forms/:id/statuses', async (req: AuthenticatedRequest, res) => {
    try {
      const formId = parseInt(req.params.id);
      if (isNaN(formId)) {
        return res.status(400).json({ success: false, error: 'Неверный ID формы' });
      }
      const existingForm = await storage.getForm(formId, req.organizationId!);
      if (!existingForm) {
        return res.status(404).json({ success: false, error: 'Форма не найдена' });
      }

      const hasManageForms = await storage.hasAppRolePermission(req.user!.appRole, ['forms.manage']);
      if (!hasManageForms) {
        const canAccess = await storage.canUserAccessForm(req.user!.id, formId, req.organizationId!, 'participate');
        if (!canAccess) {
          return res.status(403).json({ success: false, error: 'Нет доступа к этой форме' });
        }
      }
      const statuses = await storage.getFormStatuses(formId, req.organizationId!);
      res.json({ success: true, statuses });
    } catch (error) {
      console.error('Get form statuses error:', error);
      res.status(500).json({ success: false, error: 'Ошибка при получении статусов формы' });
    }
  });

  router.post('/api/forms/:id/statuses',
    requireFormAdminOrPermission('forms.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const formId = parseInt(req.params.id);
        if (isNaN(formId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID формы' });
        }
        const existingForm = await storage.getForm(formId, req.organizationId!);
        if (!existingForm) {
          return res.status(404).json({ success: false, error: 'Форма не найдена' });
        }

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

        const existingStatuses = await storage.getFormStatuses(formId, req.organizationId!);
        const incomingIds = statuses.filter((s: Record<string, unknown>) => s.id).map((s: Record<string, unknown>) => s.id as number);
        const statusesToDelete = existingStatuses.filter(existing => !incomingIds.includes(existing.id));

        if (statusesToDelete.length > 0) {
          const tasks = await storage.getTasksByForm(formId, req.organizationId!);
          const usedStatusIds = new Set(tasks.map((t: Task) => t.currentStatusId));
          for (const status of statusesToDelete) {
            if (usedStatusIds.has(status.id)) {
              return res.status(400).json({
                success: false,
                error: `Невозможно удалить статус "${status.name}" - он используется в существующих задачах. Сначала измените статус всех задач, использующих этот статус.`
              });
            }
          }
        }

        const statusIdsToDelete = statusesToDelete.map(s => s.id);
        const resultStatuses = await storage.bulkSaveFormStatuses(formId, req.organizationId!, statusIdsToDelete, statuses);
        formsCache.invalidatePrefix(`forms:${req.organizationId}`);
        indexFormWithSummaryAsync(formId, req.organizationId!).catch(() => {});

        res.status(201).json({ success: true, message: 'Статусы сохранены', statuses: resultStatuses });
      } catch (error) {
        console.error('Save form statuses error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при сохранении статусов' });
      }
    }
  );

  // === STATUS TRANSITIONS ENDPOINTS ===

  /**
   * @swagger
   * /api/forms/{id}/transitions:
   *   get:
   *     tags: [Forms]
   *     summary: Переходы между статусами
   *   post:
   *     tags: [Forms]
   *     summary: Создать переход
   */
  router.get('/api/forms/:id/transitions',
    async (req: AuthenticatedRequest, res) => {
      try {
        const formId = parseInt(req.params.id);
        if (isNaN(formId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID формы' });
        }
        const existingForm = await storage.getForm(formId, req.organizationId!);
        if (!existingForm) {
          return res.status(404).json({ success: false, error: 'Форма не найдена' });
        }

      const hasManageForms = await storage.hasAppRolePermission(req.user!.appRole, ['forms.manage']);
      if (!hasManageForms) {
        const canAccess = await storage.canUserAccessForm(req.user!.id, formId, req.organizationId!, 'participate');
        if (!canAccess) {
          return res.status(403).json({ success: false, error: 'Нет доступа к этой форме' });
        }
      }
        const transitions = await storage.getStatusTransitions(formId, req.organizationId!);
        res.json({ success: true, transitions });
      } catch (error) {
        console.error('Get transitions error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при получении переходов' });
      }
    }
  );

  router.post('/api/forms/:id/transitions',
    requireFormAdminOrPermission('forms.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const formId = parseInt(req.params.id);
        if (isNaN(formId)) {
          return res.status(400).json({ success: false, error: 'Неверный ID формы' });
        }
        const existingForm = await storage.getForm(formId, req.organizationId!);
        if (!existingForm) {
          return res.status(404).json({ success: false, error: 'Форма не найдена' });
        }

        const {
          fromStatusId, toStatusId, rejectToStatusId, actionType, actionName,
          conditions, requiredRole, assigneeUserId, assigneeConditions,
          approveButtonText, approveButtonColor, rejectButtonText, rejectButtonColor
        } = req.body;

        if (!fromStatusId || !toStatusId || !actionType) {
          return res.status(400).json({ success: false, error: 'Необходимо указать fromStatusId, toStatusId и actionType' });
        }

        const transitionData = {
          formId, fromStatusId, toStatusId,
          rejectToStatusId: rejectToStatusId || null,
          actionType, actionName, conditions, requiredRole, assigneeUserId, assigneeConditions,
          approveButtonText: approveButtonText || 'Одобрить',
          approveButtonColor: approveButtonColor || '#22c55e',
          rejectButtonText: rejectButtonText || 'Отклонить',
          rejectButtonColor: rejectButtonColor || '#ef4444'
        };

        const transition = await storage.createStatusTransition(transitionData);
        res.status(201).json({ success: true, message: 'Переход создан', transition });
      } catch (error) {
        console.error('Create transition error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при создании перехода' });
      }
    }
  );

  router.put('/api/forms/:id/transitions/:transitionId',
    requireFormAdminOrPermission('forms.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const formId = parseInt(req.params.id);
        const transitionId = parseInt(req.params.transitionId);
        if (isNaN(formId) || isNaN(transitionId)) {
          return res.status(400).json({ success: false, error: 'Неверные параметры' });
        }
        const existingForm = await storage.getForm(formId, req.organizationId!);
        if (!existingForm) {
          return res.status(404).json({ success: false, error: 'Форма не найдена' });
        }

        const transition = await storage.updateStatusTransition(transitionId, formId, req.organizationId!, req.body);
        if (!transition) {
          return res.status(404).json({ success: false, error: 'Переход не найден' });
        }
        res.json({ success: true, message: 'Переход обновлен', transition });
      } catch (error) {
        console.error('Update transition error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при обновлении перехода' });
      }
    }
  );

  router.delete('/api/forms/:id/transitions/:transitionId',
    requireFormAdminOrPermission('forms.manage'),
    async (req: AuthenticatedRequest, res) => {
      try {
        const formId = parseInt(req.params.id);
        const transitionId = parseInt(req.params.transitionId);
        if (isNaN(formId) || isNaN(transitionId)) {
          return res.status(400).json({ success: false, error: 'Неверные параметры' });
        }
        const existingForm = await storage.getForm(formId, req.organizationId!);
        if (!existingForm) {
          return res.status(404).json({ success: false, error: 'Форма не найдена' });
        }

        await storage.deleteStatusTransition(transitionId, formId, req.organizationId!);
        res.json({ success: true, message: 'Переход удален' });
      } catch (error) {
        console.error('Delete transition error:', error);
        res.status(500).json({ success: false, error: 'Ошибка при удалении перехода' });
      }
    }
  );
}