/**
 * Slot Engine Backend Router - tRPC procedures for slot game operations
 */

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

export const slotEngineRouter = router({
  /**
   * Create a new game configuration
   */
  createGame: protectedProcedure
    .input(
      z.object({
        name: z.string(),
        slug: z.string(),
        reels: z.number().min(1).max(10),
        rows: z.number().min(1).max(10),
        minBet: z.number().positive(),
        maxBet: z.number().positive(),
        rtp: z.number().min(80).max(99),
        volatility: z.enum(['low', 'medium', 'high']),
        symbols: z.array(
          z.object({
            id: z.string(),
            name: z.string(),
            type: z.enum(['regular', 'wild', 'scatter', 'bonus', 'jackpot']),
            weight: z.number().positive(),
            payouts: z.record(z.number(), z.number()),
          })
        ),
        paylines: z.array(
          z.object({
            id: z.string(),
            positions: z.array(z.number()),
          })
        ),
        features: z.array(
          z.object({
            id: z.string(),
            name: z.string(),
            type: z.enum(['wild', 'scatter', 'free_spins', 'bonus_round', 'respin', 'collect_and_win', 'multiplier']),
            triggerSymbol: z.string().optional(),
            triggerCount: z.number().optional(),
            config: z.record(z.any()),
          })
        ),
        theme: z.object({
          name: z.string(),
          backgroundColor: z.string().optional(),
          accentColor: z.string().optional(),
        }).optional(),
      })
    )
    .mutation(async ({ input, ctx }) => {
      // Store game configuration in database
      const gameConfig = {
        ...input,
        userId: ctx.user.id,
        createdAt: new Date(),
        updatedAt: new Date(),
      };

      // In real implementation, save to database
      // await db.games.create(gameConfig);

      return {
        success: true,
        gameId: `game_${Date.now()}`,
        config: gameConfig,
      };
    }),

  /**
   * Get game configuration
   */
  getGame: publicProcedure
    .input(z.object({ gameId: z.string() }))
    .query(async ({ input }) => {
      // Fetch game configuration from database
      // const game = await db.games.findById(input.gameId);

      return {
        id: input.gameId,
        name: 'Sample Game',
        reels: 3,
        rows: 3,
        // ... full game config
      };
    }),

  /**
   * Record a spin
   */
  recordSpin: protectedProcedure
    .input(
      z.object({
        gameId: z.string(),
        betAmount: z.number().positive(),
        currency: z.enum(['gc', 'sc']),
        spinData: z.object({
          reels: z.array(z.array(z.string())),
          wins: z.array(
            z.object({
              paylineId: z.string(),
              symbols: z.array(z.string()),
              count: z.number(),
              payout: z.number(),
              positions: z.array(z.number()),
            })
          ),
          totalWin: z.number(),
          featuresTriggered: z.array(z.any()),
          rngSeed: z.string().optional(),
        }),
      })
    )
    .mutation(async ({ input, ctx }) => {
      const { gameId, betAmount, currency, spinData } = input;

      // Calculate final payout
      const payout = spinData.totalWin * betAmount;

      // Update user balance
      if (currency === 'gc') {
        // await db.users.updateBalance(ctx.user.id, -betAmount, 'gc');
        // if (payout > 0) {
        //   await db.users.updateBalance(ctx.user.id, payout, 'gc');
        // }
      } else {
        // await db.users.updateBalance(ctx.user.id, -betAmount, 'sc');
        // if (payout > 0) {
        //   await db.users.updateBalance(ctx.user.id, payout, 'sc');
        // }
      }

      // Record spin in game history
      const spinRecord = {
        userId: ctx.user.id,
        gameId,
        betAmount,
        currency,
        payout,
        spinData: JSON.stringify(spinData),
        createdAt: new Date(),
      };

      // await db.gameHistory.create(spinRecord);

      return {
        success: true,
        spinId: `spin_${Date.now()}`,
        newBalance: {
          gc: 1000, // Placeholder
          sc: 500, // Placeholder
        },
        payout,
      };
    }),

  /**
   * Get spin history
   */
  getSpinHistory: protectedProcedure
    .input(
      z.object({
        gameId: z.string().optional(),
        limit: z.number().min(1).max(100).default(50),
        offset: z.number().min(0).default(0),
      })
    )
    .query(async ({ input, ctx }) => {
      // Fetch spin history from database
      // const history = await db.gameHistory.find({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      //   limit: input.limit,
      //   offset: input.offset,
      // });

      return {
        spins: [], // Placeholder
        total: 0,
        limit: input.limit,
        offset: input.offset,
      };
    }),

  /**
   * Get game statistics
   */
  getGameStats: protectedProcedure
    .input(z.object({ gameId: z.string() }))
    .query(async ({ input, ctx }) => {
      // Calculate statistics from spin history
      // const stats = await db.gameHistory.getStats({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      // });

      return {
        totalSpins: 0,
        totalBet: 0,
        totalWin: 0,
        rtp: 0,
        averageWin: 0,
        biggestWin: 0,
        lastPlayedAt: new Date(),
      };
    }),

  /**
   * Get leaderboard
   */
  getLeaderboard: publicProcedure
    .input(
      z.object({
        gameId: z.string(),
        timeframe: z.enum(['day', 'week', 'month', 'all']).default('week'),
        limit: z.number().min(1).max(100).default(10),
      })
    )
    .query(async ({ input }) => {
      // Fetch leaderboard from database
      // const leaderboard = await db.gameHistory.getLeaderboard({
      //   gameId: input.gameId,
      //   timeframe: input.timeframe,
      //   limit: input.limit,
      // });

      return {
        entries: [], // Placeholder
        timeframe: input.timeframe,
        updatedAt: new Date(),
      };
    }),

  /**
   * Get player statistics
   */
  getPlayerStats: protectedProcedure
    .input(z.object({ gameId: z.string().optional() }))
    .query(async ({ input, ctx }) => {
      // Calculate player statistics
      // const stats = await db.gameHistory.getPlayerStats({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      // });

      return {
        totalGamesPlayed: 0,
        totalSpent: 0,
        totalWon: 0,
        netProfit: 0,
        favoriteGame: null,
        playTime: 0, // in minutes
      };
    }),

  /**
   * Save game progress
   */
  saveProgress: protectedProcedure
    .input(
      z.object({
        gameId: z.string(),
        progress: z.object({
          currentBalance: z.number(),
          currentBet: z.number(),
          autoSpinCount: z.number(),
          bonusRoundActive: z.boolean(),
          bonusRoundData: z.any().optional(),
        }),
      })
    )
    .mutation(async ({ input, ctx }) => {
      // Save game progress to database
      // await db.gameProgress.save({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      //   progress: input.progress,
      // });

      return { success: true };
    }),

  /**
   * Load game progress
   */
  loadProgress: protectedProcedure
    .input(z.object({ gameId: z.string() }))
    .query(async ({ input, ctx }) => {
      // Load game progress from database
      // const progress = await db.gameProgress.load({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      // });

      return {
        currentBalance: 1000,
        currentBet: 10,
        autoSpinCount: 0,
        bonusRoundActive: false,
      };
    }),

  /**
   * Record big win
   */
  recordBigWin: protectedProcedure
    .input(
      z.object({
        gameId: z.string(),
        winAmount: z.number().positive(),
        currency: z.enum(['gc', 'sc']),
        multiplier: z.number().default(1),
      })
    )
    .mutation(async ({ input, ctx }) => {
      // Record big win in achievements/notifications
      // await db.achievements.recordBigWin({
      //   userId: ctx.user.id,
      //   gameId: input.gameId,
      //   winAmount: input.winAmount,
      //   currency: input.currency,
      //   multiplier: input.multiplier,
      // });

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

  /**
   * Get game list
   */
  listGames: publicProcedure
    .input(
      z.object({
        limit: z.number().min(1).max(100).default(20),
        offset: z.number().min(0).default(0),
        volatility: z.enum(['low', 'medium', 'high']).optional(),
        minRtp: z.number().optional(),
      })
    )
    .query(async ({ input }) => {
      // Fetch games from database
      // const games = await db.games.list({
      //   limit: input.limit,
      //   offset: input.offset,
      //   volatility: input.volatility,
      //   minRtp: input.minRtp,
      // });

      return {
        games: [], // Placeholder
        total: 0,
        limit: input.limit,
        offset: input.offset,
      };
    }),

  /**
   * Get game categories
   */
  getCategories: publicProcedure.query(async () => {
    return {
      categories: [
        { id: 'classic', name: 'Classic Slots', count: 0 },
        { id: 'video', name: 'Video Slots', count: 0 },
        { id: 'progressive', name: 'Progressive Jackpot', count: 0 },
        { id: 'themed', name: 'Themed Slots', count: 0 },
      ],
    };
  }),
});