import { router, protectedProcedure } from "../_core/trpc.ts";
import { z } from 'zod';
import { db } from "../db.ts";
import { SendMessageSchema } from "../../shared/messaging.ts";

export const messagingRouter = router({
  // Get all conversations for a user
  getConversations: protectedProcedure
    .input(z.object({ userId: z.string() }))
    .query(async ({ input, ctx }) => {
      // Mock data - replace with actual database query
      return [
        {
          id: 'conv-1',
          participantName: 'John Smith',
          participantAvatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=John',
          lastMessage: 'Thanks for the coaching session!',
          lastMessageTime: new Date(Date.now() - 2 * 60 * 60 * 1000).toLocaleString(),
          unreadCount: 0,
          isPinned: true,
          isArchived: false,
        },
        {
          id: 'conv-2',
          participantName: 'Sarah Johnson',
          participantAvatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=Sarah',
          lastMessage: 'Can we schedule a meeting?',
          lastMessageTime: new Date(Date.now() - 5 * 60 * 60 * 1000).toLocaleString(),
          unreadCount: 2,
          isPinned: false,
          isArchived: false,
        },
        {
          id: 'conv-3',
          participantName: 'Mike Chen',
          participantAvatar: 'https://api.dicebear.com/7.x/avataaars/svg?seed=Mike',
          lastMessage: 'I completed the certification!',
          lastMessageTime: new Date(Date.now() - 1 * 24 * 60 * 60 * 1000).toLocaleString(),
          unreadCount: 0,
          isPinned: false,
          isArchived: false,
        },
      ];
    }),

  // Get messages for a conversation
  getMessages: protectedProcedure
    .input(z.object({ conversationId: z.string() }))
    .query(async ({ input }) => {
      // Mock data - replace with actual database query
      const messages = [
        {
          id: 'msg-1',
          senderId: 'user-1',
          recipientId: 'user-2',
          content: 'Hi! How are you doing with the fraud detection training?',
          type: 'coaching',
          status: 'read',
          createdAt: new Date(Date.now() - 3 * 60 * 60 * 1000),
          readAt: new Date(Date.now() - 2.5 * 60 * 60 * 1000),
        },
        {
          id: 'msg-2',
          senderId: 'user-2',
          recipientId: 'user-1',
          content: 'Going well! I completed 3 modules so far.',
          type: 'text',
          status: 'read',
          createdAt: new Date(Date.now() - 2.5 * 60 * 60 * 1000),
          readAt: new Date(Date.now() - 2 * 60 * 60 * 1000),
        },
        {
          id: 'msg-3',
          senderId: 'user-1',
          recipientId: 'user-2',
          content: 'Great! Keep up the momentum. Let\'s schedule a check-in call.',
          type: 'text',
          status: 'read',
          createdAt: new Date(Date.now() - 2 * 60 * 60 * 1000),
          readAt: new Date(Date.now() - 1.5 * 60 * 60 * 1000),
        },
      ];

      return messages;
    }),

  // Get conversation details
  getConversationDetails: protectedProcedure
    .input(z.object({ conversationId: z.string() }))
    .query(async ({ input }) => {
      // Mock data - replace with actual database query
      return {
        participantName: 'John Smith',
        participantRole: 'Admin - Fraud Detection',
        status: 'online',
        messageCount: 24,
        createdAt: new Date(Date.now() - 30 * 24 * 60 * 60 * 1000),
        lastActive: new Date(),
      };
    }),

  // Send a message
  sendMessage: protectedProcedure
    .input(SendMessageSchema)
    .mutation(async ({ input, ctx }) => {
      // Mock implementation - replace with actual database insert
      const message = {
        id: `msg-${Date.now()}`,
        senderId: ctx.user.id,
        recipientId: input.recipientId,
        content: input.content,
        type: input.type || 'text',
        status: 'sent' as const,
        createdAt: new Date(),
        attachments: input.attachments,
        metadata: input.metadata,
      };

      // TODO: Save to database
      // TODO: Emit WebSocket event to recipient
      // TODO: Create notification for recipient

      return message;
    }),

  // Mark conversation as read
  markConversationAsRead: protectedProcedure
    .input(z.object({ conversationId: z.string() }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Update database to mark all messages as read
      // TODO: Emit WebSocket event to other participant

      return { success: true };
    }),

  // Search messages
  searchMessages: protectedProcedure
    .input(z.object({
      query: z.string(),
      conversationId: z.string().optional(),
    }))
    .query(async ({ input }) => {
      // Mock data - replace with actual database search
      return [
        {
          id: 'msg-1',
          conversationId: 'conv-1',
          participantName: 'John Smith',
          content: 'Thanks for the coaching session!',
          createdAt: new Date(),
          type: 'text',
        },
      ];
    }),

  // Delete message
  deleteMessage: protectedProcedure
    .input(z.object({ messageId: z.string() }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Delete from database
      // TODO: Emit WebSocket event to other participant

      return { success: true };
    }),

  // Edit message
  editMessage: protectedProcedure
    .input(z.object({
      messageId: z.string(),
      content: z.string(),
    }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Update database
      // TODO: Emit WebSocket event to other participant

      return { success: true };
    }),

  // Pin/unpin conversation
  togglePinConversation: protectedProcedure
    .input(z.object({ conversationId: z.string() }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Update database

      return { success: true };
    }),

  // Archive conversation
  archiveConversation: protectedProcedure
    .input(z.object({ conversationId: z.string() }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Update database

      return { success: true };
    }),

  // Get unread message count
  getUnreadCount: protectedProcedure
    .query(async ({ ctx }) => {
      // Mock data - replace with actual database query
      return {
        total: 3,
        byConversation: {
          'conv-1': 0,
          'conv-2': 2,
          'conv-3': 1,
        },
      };
    }),

  // Send bulk message
  sendBulkMessage: protectedProcedure
    .input(z.object({
      recipientIds: z.array(z.string()),
      content: z.string(),
      type: z.enum(['text', 'coaching', 'feedback', 'announcement']).default('text'),
    }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Send message to multiple recipients
      // TODO: Create notifications for all recipients

      return {
        success: true,
        messagesSent: input.recipientIds.length,
      };
    }),

  // Get message reactions
  getMessageReactions: protectedProcedure
    .input(z.object({ messageId: z.string() }))
    .query(async ({ input }) => {
      // Mock data
      return [
        { emoji: '👍', count: 2, userReacted: true },
        { emoji: '❤️', count: 1, userReacted: false },
      ];
    }),

  // Add message reaction
  addMessageReaction: protectedProcedure
    .input(z.object({
      messageId: z.string(),
      emoji: z.string(),
    }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Save reaction to database
      // TODO: Emit WebSocket event

      return { success: true };
    }),

  // Get typing status
  setTypingStatus: protectedProcedure
    .input(z.object({
      conversationId: z.string(),
      isTyping: z.boolean(),
    }))
    .mutation(async ({ input, ctx }) => {
      // TODO: Emit WebSocket event to other participant

      return { success: true };
    }),
});