// 玩家資料
let playerData = [];

// 載入CSV檔案
async function loadPlayerData() {
    try {
        const response = await fetch('ID.csv');
        const data = await response.text();
        
        // 解析CSV資料
        const rows = data.split('\n');
        const headers = rows[0].split(',');     
        // 跳過標題行，處理每一行資料
        for (let i = 1; i < rows.length; i++) {
            if (rows[i].trim() === '') continue;
            
            const values = rows[i].split(',');
            const player = {
                id: values[0].trim(),
                name: values[1].trim(),
                profession: values[2].trim()
            };
            playerData.push(player);
        }
        
        console.log('玩家資料載入成功:', playerData);
    } catch (error) {
        console.error('載入玩家資料失敗:', error);
    }
}

// 支援跨裝置存檔的功能
function generateSaveCode(playerId) {
    const progress = localStorage.getItem(`gameProgress_${playerId}`);
    if (progress) {
        // 將遊戲進度轉為Base64編碼
        return btoa(JSON.stringify({
            id: playerId,
            progress: JSON.parse(progress)
        }));
    }
    return null;
}

function loadFromSaveCode(saveCode) {
    try {
        // 解碼並解析存檔數據
        const data = JSON.parse(atob(saveCode));
        const playerId = data.id;
        const progress = data.progress;
        
        // 將進度存入localStorage
        localStorage.setItem(`gameProgress_${playerId}`, JSON.stringify(progress));
        localStorage.setItem('currentPlayerId', playerId);
        
        return { success: true, playerId: playerId };
    } catch (error) {
        console.error('載入存檔失敗:', error);
        return { success: false, error: '存檔格式錯誤' };
    }
}

// 頁面載入完成後的初始化
document.addEventListener('DOMContentLoaded', async function() {
    console.log('DOM 載入完成，開始初始化...');
    
    // 載入玩家資料
    await loadPlayerData();
    
    // 獲取所有按鈕元素
    const startGameBtn = document.getElementById('start-btn');
    const loadGameBtn = document.getElementById('load-btn');
    const achievementsBtn = document.getElementById('achievements-btn');
    const exitGameBtn = document.getElementById('exit-btn');
    const toggleBgmBtn = document.getElementById('toggle-bgm');
    
    // 調試：檢查按鈕是否正確獲取
    console.log('開始遊戲按鈕:', startGameBtn);
    console.log('讀取進度按鈕:', loadGameBtn);
    console.log('成就圖鑑按鈕:', achievementsBtn);
    console.log('結束遊戲按鈕:', exitGameBtn);
    console.log('音樂開關按鈕:', toggleBgmBtn);
    
    // 獲取模態框元素
    const playerModal = document.getElementById('id-modal');
    const loadModal = document.getElementById('welcome-modal');
    const closeModalBtns = document.querySelectorAll('.close-btn, .close-welcome-btn');
    
    // 調試：檢查模態框是否正確獲取
    console.log('玩家選擇模態框:', playerModal);
    console.log('讀取進度模態框:', loadModal);
    console.log('關閉按鈕:', closeModalBtns);
    
    // 開始遊戲按鈕
    if (startGameBtn) {
        startGameBtn.addEventListener('click', function() {
            console.log('點擊開始遊戲按鈕');
            if (playerModal) {
                playerModal.style.display = 'block';
                // 直接顯示 ID 輸入框，而不是玩家列表
            } else {
                console.error('找不到玩家選擇模態框');
            }
        });
    } else {
        console.error('找不到開始遊戲按鈕');
    }
    
    // 讀取進度按鈕
    if (loadGameBtn) {
        loadGameBtn.addEventListener('click', function() {
            console.log('點擊讀取進度按鈕');
            
            // 檢查是否有當前玩家ID
            const currentPlayerId = localStorage.getItem('currentPlayerId');
            if (currentPlayerId) {
                // 檢查是否有該玩家的存檔
                const existingProgress = localStorage.getItem(`gameProgress_${currentPlayerId}`);
                if (existingProgress) {
                    if (confirm(`發現玩家 ${currentPlayerId} 的存檔，是否載入進度？`)) {
                        window.location.href = 'kingdom_map.html';
                    }
                } else {
                    alert(`玩家 ${currentPlayerId} 沒有存檔記錄`);
                }
            } else {
                alert('請先開始遊戲或輸入玩家ID');
            }
        });
    } else {
        console.error('找不到讀取進度按鈕');
    }
    
    // 成就圖鑑按鈕
    if (achievementsBtn) {
        achievementsBtn.addEventListener('click', function() {
            console.log('點擊成就圖鑑按鈕');
            window.location.href = 'achievements.html';
        });
    } else {
        console.error('找不到成就圖鑑按鈕');
    }
    
    // 結束遊戲按鈕
    if (exitGameBtn) {
        exitGameBtn.addEventListener('click', function() {
            console.log('點擊結束遊戲按鈕');
            if (confirm('確定要結束遊戲嗎？')) {
                window.close();
            }
        });
    } else {
        console.error('找不到結束遊戲按鈕');
    }
    
    // 關閉模態框
    closeModalBtns.forEach(function(btn) {
        btn.addEventListener('click', function() {
            console.log('點擊關閉模態框按鈕');
            const modal = btn.closest('.modal');
            if (modal) {
                modal.style.display = 'none';
            }
        });
    });
    
    // 點擊模態框外部關閉
    window.addEventListener('click', function(event) {
        if (event.target.classList.contains('modal')) {
            event.target.style.display = 'none';
        }
    });
    
    // 處理 ID 輸入確認
    const confirmIdBtn = document.getElementById('confirm-id');
    const playerIdInput = document.getElementById('player-id');
    const idError = document.getElementById('id-error');
    
    if (confirmIdBtn && playerIdInput) {
        confirmIdBtn.addEventListener('click', function() {
            const playerId = playerIdInput.value.trim();
            if (!playerId) {
                if (idError) idError.textContent = '請輸入ID';
                return;
            }
            
            // 設置玩家資料
            localStorage.setItem('currentPlayerId', playerId);
            localStorage.setItem('currentPlayerName', playerId); // 暫時使用 ID 作為名稱
            
            // 檢查是否有存檔
            const existingProgress = localStorage.getItem(`gameProgress_${playerId}`);
            if (existingProgress) {
                if (confirm(`發現 ${playerId} 的存檔，是否繼續之前的進度？`)) {
                    window.location.href = 'kingdom_map.html';
                } else {
                    // 重新開始遊戲
                    localStorage.removeItem(`gameProgress_${playerId}`);
                    window.location.href = 'prologue.html';
                }
            } else {
                // 新遊戲
                window.location.href = 'prologue.html';
            }
        });
    }
});