'use client';

import { useState, useEffect } from 'react';

export interface GameState {
    date: string;
    guesses: string[]; // Array of song titles or IDs guessed
    isSolved: boolean;
    isFailed: boolean;
    lastPlayed: number; // Timestamp
}

const STORAGE_KEY = 'hoerdle_game_state';

export function useGameState() {
    const [gameState, setGameState] = useState<GameState | null>(null);

    useEffect(() => {
        const stored = localStorage.getItem(STORAGE_KEY);
        const today = new Date().toISOString().split('T')[0];

        if (stored) {
            const parsed: GameState = JSON.parse(stored);
            if (parsed.date === today) {
                setGameState(parsed);
                return;
            }
        }

        // New day or no state
        const newState: GameState = {
            date: today,
            guesses: [],
            isSolved: false,
            isFailed: false,
            lastPlayed: Date.now(),
        };
        setGameState(newState);
        localStorage.setItem(STORAGE_KEY, JSON.stringify(newState));
    }, []);

    const saveState = (newState: GameState) => {
        setGameState(newState);
        localStorage.setItem(STORAGE_KEY, JSON.stringify(newState));
    };

    const addGuess = (guess: string, correct: boolean) => {
        if (!gameState) return;

        const newGuesses = [...gameState.guesses, guess];
        const isSolved = correct;
        const isFailed = !correct && newGuesses.length >= 6;

        const newState = {
            ...gameState,
            guesses: newGuesses,
            isSolved,
            isFailed,
            lastPlayed: Date.now(),
        };

        saveState(newState);
    };

    return { gameState, addGuess };
}