import {IGameContext} from "@/core/game";
import {RegicideState} from "@/samples/regicide/state";
import {buildEnemyDeck, buildTavernDeck, createAllCards, getPlayerHandRegionId} from "@/samples/regicide/utils";
import {INITIAL_HAND_SIZE} from "@/samples/regicide/constants";
import {Enemy, PlayerType, RegicideCard} from "@/samples/regicide/types";

export type RegicideGame = IGameContext<RegicideState>;

/**
 * 初始化游戏设置
 * @param game 游戏上下文
 * @param playerCount 玩家数量（1-4）
 * @param seed 随机种子（可选）
 */
export async function setupGame(game: RegicideGame, playerCount: number, seed?: number) {
    if (playerCount < 1 || playerCount > 4) {
        throw new Error('玩家数量必须为 1-4 人');
    }

    if (seed) {
        // RNG seeding handled by game context
    }

    // 创建所有卡牌
    const allCards = createAllCards();

    // 构建敌人牌堆（J/Q/K）
    const enemyDeck = buildEnemyDeck(game._rng);

    // 构建酒馆牌堆（A-10）
    const tavernDeck = buildTavernDeck(game._rng);

    // 初始化游戏状态
    await game.produceAsync(state => {
        state.cards = allCards;
        state.playerCount = playerCount;
        state.currentPlayerIndex = 0;
        state.enemyDeck = enemyDeck;

        // 设置酒馆牌堆区域
        for (const card of tavernDeck) {
            card.regionId = 'tavernDeck';
            state.regions.tavernDeck.childIds.push(card.id);
        }

        // 设置敌人牌堆区域（只存储ID，敌人是独立对象）
        state.regions.enemyDeck.childIds = enemyDeck.map(e => e.id);

        // 给每个玩家发牌
        const players: PlayerType[] = ['player1', 'player2', 'player3', 'player4'];
        for (let i = 0; i < playerCount; i++) {
            const player = players[i];
            const regionId = getPlayerHandRegionId(player);

            for (let j = 0; j < INITIAL_HAND_SIZE; j++) {
                if (tavernDeck.length === 0) break;
                const card = tavernDeck.shift()!;
                card.regionId = regionId;
                state.playerHands[player].push(card.id);
                const region = state.regions[regionId as keyof typeof state.regions];
                region.childIds.push(card.id);
            }
        }

        // 翻开第一个敌人
        if (enemyDeck.length > 0) {
            const firstEnemy = enemyDeck.shift()!;
            state.currentEnemy = firstEnemy;
        }
    });
}

/**
 * 启动游戏主循环
 */
export async function start(game: RegicideGame) {
    const state = game.value;

    // 检查游戏是否已设置
    if (!state.currentEnemy) {
        throw new Error('请先调用 setupGame 初始化游戏');
    }

    const players: PlayerType[] = ['player1', 'player2', 'player3', 'player4'];

    // 主游戏循环
    while (state.phase === 'playing') {
        const currentPlayerIndex = state.currentPlayerIndex;
        const currentPlayer = players[currentPlayerIndex];

        // 检查当前玩家是否有手牌
        const currentHand = state.playerHands[currentPlayer];
        if (currentHand.length === 0) {
            // 玩家没有手牌，跳过回合
            await game.produceAsync(state => {
                state.currentPlayerIndex = (state.currentPlayerIndex + 1) % state.playerCount;
            });
            continue;
        }

        // 等待玩家输入（出牌或让过）
        // 这里需要外部通过 prompt 系统获取输入
        // 实际使用时由 UI 或测试代码提供输入

        // 循环会在外部调用 play/pass 命令后继续
        // 当 phase 变为 'victory' 或 'defeat' 时退出
        break;
    }

    return game.value;
}

/**
 * 处理完整的玩家回合
 */
export async function playTurn(game: RegicideGame, player: PlayerType, action: 'play' | 'pass', cardId?: string, secondCardId?: string) {
    const state = game.value;

    if (state.phase !== 'playing') {
        return {success: false, error: '游戏已结束'};
    }

    if (!state.currentEnemy) {
        return {success: false, error: '没有活跃的敌人'};
    }

    let playResult: any;

    // 执行玩家动作
    if (action === 'play' && cardId) {
        // 检查是否是A配合另一张牌
        const card = state.cards[cardId];
        if (card.rank === 'A' && secondCardId) {
            playResult = await game.run(`play-with-a ${player} ${cardId} ${secondCardId}`);
        } else {
            playResult = await game.run(`play ${player} ${cardId}`);
        }
    } else {
        // 让过
        playResult = await game.run(`pass ${player}`);
    }

    if (!playResult.success) {
        return playResult;
    }

    // 检查敌人是否被击败
    const checkResult = await game.run<{defeated: boolean; currentEnemy?: any; nextEnemy?: any; defeatedEnemy?: any; enemiesRemaining?: number}>('check-enemy');
    if (!checkResult.success) {
        return checkResult;
    }

    // 如果敌人未被击败，处理反击
    if (!checkResult.result.defeated) {
        // 反击逻辑需要玩家选择弃牌，这里返回状态让外部处理
        return {
            success: true,
            result: {
                playResult: playResult.result,
                enemyDefeated: false,
                needsDiscard: true,
                enemyAttack: state.currentEnemy.value,
                playerHand: state.playerHands[player]
            }
        };
    }

    // 敌人被击败，检查是否还有更多敌人
    if (state.enemyDeck.length === 0 && state.currentEnemy && state.currentEnemy.hp <= 0) {
        await game.produceAsync(state => {
            state.phase = 'victory';
            state.winner = true;
        });
        return {
            success: true,
            result: {
                playResult: playResult.result,
                enemyDefeated: true,
                gameWon: true
            }
        };
    }

    // 切换到下一个玩家
    await game.run('next-turn');

    return {
        success: true,
        result: {
            playResult: playResult.result,
            enemyDefeated: true,
            nextEnemy: state.currentEnemy
        }
    };
}

/**
 * 处理反击阶段的弃牌
 */
export async function handleCounterattack(game: RegicideGame, player: PlayerType, discardCardIds: string[]) {
    const result = await game.run(`counterattack ${player} ${JSON.stringify(discardCardIds)}`);

    if (!result.success) {
        // 弃牌失败（点数和不足），游戏失败
        await game.produceAsync(state => {
            state.phase = 'defeat';
            state.winner = false;
        });
        return result;
    }

    // 弃牌成功，切换到下一个玩家
    await game.run('next-turn');

    return result;
}

/**
 * 获取当前游戏状态摘要
 */
export function getGameStatus(game: RegicideGame) {
    const state = game.value;

    return {
        phase: state.phase,
        currentPlayer: ['player1', 'player2', 'player3', 'player4'][state.currentPlayerIndex],
        currentEnemy: state.currentEnemy ? {
            ...state.currentEnemy,
            hpPercent: Math.round((state.currentEnemy.hp / state.currentEnemy.maxHp) * 100)
        } : null,
        enemiesRemaining: state.enemyDeck.length,
        tavernDeckCount: state.regions.tavernDeck.childIds.length,
        discardPileCount: state.regions.discardPile.childIds.length,
        playerHands: Object.fromEntries(
            Object.entries(state.playerHands).map(([player, hand]) => [player, hand.length])
        ),
        winner: state.winner
    };
}