import { router, adminProcedure, publicProcedure } from "../_core/trpc.ts";
import { z } from 'zod';
import { TRPCError } from '@trpc/server';

export const adminTrainingRouter = router({
  // Video Management
  videos: router({
    list: publicProcedure
      .input(z.object({ moduleId: z.string().optional() }).optional())
      .query(async ({ input }) => {
        // TODO: Fetch from database
        return [];
      }),

    getById: publicProcedure
      .input(z.object({ id: z.string() }))
      .query(async ({ input }) => {
        // TODO: Fetch from database
        return null;
      }),

    create: adminProcedure
      .input(
        z.object({
          title: z.string().min(1),
          description: z.string(),
          duration: z.number().positive(),
          url: z.string().url(),
          thumbnail: z.string().url(),
          moduleId: z.string(),
          difficulty: z.enum(['beginner', 'intermediate', 'advanced']),
          tags: z.array(z.string()),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Save to database
        // Log audit event
        return { id: 'video-' + Date.now(), ...input };
      }),

    update: adminProcedure
      .input(
        z.object({
          id: z.string(),
          title: z.string().optional(),
          description: z.string().optional(),
          duration: z.number().optional(),
          url: z.string().url().optional(),
          thumbnail: z.string().url().optional(),
          difficulty: z.enum(['beginner', 'intermediate', 'advanced']).optional(),
          tags: z.array(z.string()).optional(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Update in database
        return { success: true };
      }),

    delete: adminProcedure
      .input(z.object({ id: z.string() }))
      .mutation(async ({ input, ctx }) => {
        // TODO: Delete from database
        return { success: true };
      }),
  }),

  // Quiz Management
  quizzes: router({
    list: publicProcedure
      .input(z.object({ moduleId: z.string().optional() }).optional())
      .query(async ({ input }) => {
        // TODO: Fetch from database
        return [];
      }),

    getById: publicProcedure
      .input(z.object({ id: z.string() }))
      .query(async ({ input }) => {
        // TODO: Fetch from database
        return null;
      }),

    createQuestion: adminProcedure
      .input(
        z.object({
          moduleId: z.string(),
          question: z.string().min(1),
          description: z.string().optional(),
          type: z.enum(['multiple-choice', 'true-false', 'short-answer']),
          options: z.array(z.string()).optional(),
          correctAnswer: z.union([z.string(), z.number(), z.boolean()]),
          explanation: z.string(),
          points: z.number().positive(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Save to database
        return { id: 'question-' + Date.now(), ...input };
      }),

    updateQuestion: adminProcedure
      .input(
        z.object({
          id: z.string(),
          question: z.string().optional(),
          description: z.string().optional(),
          type: z.enum(['multiple-choice', 'true-false', 'short-answer']).optional(),
          options: z.array(z.string()).optional(),
          correctAnswer: z.union([z.string(), z.number(), z.boolean()]).optional(),
          explanation: z.string().optional(),
          points: z.number().optional(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Update in database
        return { success: true };
      }),

    deleteQuestion: adminProcedure
      .input(z.object({ id: z.string() }))
      .mutation(async ({ input, ctx }) => {
        // TODO: Delete from database
        return { success: true };
      }),

    submitQuiz: publicProcedure
      .input(
        z.object({
          moduleId: z.string(),
          answers: z.record(z.union([z.string(), z.number(), z.boolean()])),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Score quiz and save attempt
        // TODO: Check if user passed and issue certificate if applicable
        return {
          score: 0,
          percentage: 0,
          passed: false,
          certificateIssued: false,
        };
      }),
  }),

  // Certification Management
  certifications: router({
    list: publicProcedure.query(async () => {
      // TODO: Fetch from database
      return [];
    }),

    getById: publicProcedure
      .input(z.object({ id: z.string() }))
      .query(async ({ input }) => {
        // TODO: Fetch from database
        return null;
      }),

    create: adminProcedure
      .input(
        z.object({
          name: z.string().min(1),
          description: z.string(),
          requiredModules: z.array(z.string()),
          requiredQuizScore: z.number().min(0).max(100),
          badgeIcon: z.string().url(),
          badgeColor: z.string(),
          expiresAt: z.number().optional(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Save to database
        return { id: 'cert-' + Date.now(), ...input };
      }),

    update: adminProcedure
      .input(
        z.object({
          id: z.string(),
          name: z.string().optional(),
          description: z.string().optional(),
          requiredModules: z.array(z.string()).optional(),
          requiredQuizScore: z.number().optional(),
          badgeIcon: z.string().url().optional(),
          badgeColor: z.string().optional(),
          expiresAt: z.number().optional(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Update in database
        return { success: true };
      }),

    delete: adminProcedure
      .input(z.object({ id: z.string() }))
      .mutation(async ({ input, ctx }) => {
        // TODO: Delete from database
        return { success: true };
      }),

    getUserCertifications: publicProcedure
      .input(z.object({ userId: z.string() }).optional())
      .query(async ({ input, ctx }) => {
        // TODO: Fetch user's issued certificates from database
        return [];
      }),

    issueCertificate: adminProcedure
      .input(
        z.object({
          userId: z.string(),
          certificationId: z.string(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Issue certificate and save to database
        return {
          id: 'issue-' + Date.now(),
          certificateNumber: 'COINKRAZY-' + Date.now(),
          verificationUrl: `${process.env.VITE_FRONTEND_URL}/verify-certificate/COINKRAZY-${Date.now()}`,
        };
      }),
  }),

  // Progress Tracking
  progress: router({
    getProgress: publicProcedure
      .input(z.object({ userId: z.string().optional() }).optional())
      .query(async ({ input, ctx }) => {
        // TODO: Fetch user's training progress from database
        return {
          totalModulesCompleted: 0,
          totalVideosWatched: 0,
          totalQuizzesPassed: 0,
          totalCertificationsEarned: 0,
          totalBadgesEarned: 0,
          averageQuizScore: 0,
          totalTrainingHours: 0,
          lastActivityAt: new Date(),
        };
      }),

    recordVideoWatch: publicProcedure
      .input(
        z.object({
          videoId: z.string(),
          watchedDuration: z.number(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Save video watch record to database
        return { success: true };
      }),

    recordModuleCompletion: publicProcedure
      .input(z.object({ moduleId: z.string() }))
      .mutation(async ({ input, ctx }) => {
        // TODO: Mark module as complete in database
        // TODO: Award milestone badges if applicable
        return { success: true, badgesEarned: [] };
      }),

    recordTourCompletion: publicProcedure
      .input(z.object({ tourId: z.string() }))
      .mutation(async ({ input, ctx }) => {
        // TODO: Mark tour as complete in database
        return { success: true };
      }),
  }),

  // Badges
  badges: router({
    list: publicProcedure.query(async () => {
      // TODO: Fetch all badges from database
      return [];
    }),

    getUserBadges: publicProcedure
      .input(z.object({ userId: z.string().optional() }).optional())
      .query(async ({ input, ctx }) => {
        // TODO: Fetch user's earned badges from database
        return [];
      }),

    awardBadge: adminProcedure
      .input(
        z.object({
          userId: z.string(),
          badgeId: z.string(),
        })
      )
      .mutation(async ({ input, ctx }) => {
        // TODO: Award badge to user and save to database
        return { success: true };
      }),
  }),

  // Analytics
  analytics: router({
    getTrainingStats: adminProcedure.query(async ({ ctx }) => {
      // TODO: Fetch training analytics from database
      return {
        totalAdminsInTraining: 0,
        totalModulesCompleted: 0,
        totalCertificationsIssued: 0,
        averageCompletionRate: 0,
        mostPopularModule: '',
        averageQuizScore: 0,
      };
    }),

    getModuleStats: adminProcedure
      .input(z.object({ moduleId: z.string() }))
      .query(async ({ input }) => {
        // TODO: Fetch module-specific analytics from database
        return {
          totalStarts: 0,
          totalCompletions: 0,
          completionRate: 0,
          averageTimeSpent: 0,
          averageQuizScore: 0,
        };
      }),

    getUserTrainingHistory: adminProcedure
      .input(z.object({ userId: z.string() }))
      .query(async ({ input }) => {
        // TODO: Fetch user's complete training history from database
        return {
          modulesCompleted: [],
          certificationsEarned: [],
          badgesEarned: [],
          totalHoursSpent: 0,
          lastActivityAt: new Date(),
        };
      }),
  }),
});