// API基础路径
const API_BASE = '';

// 页面加载完成后执行
document.addEventListener('DOMContentLoaded', () => {
    loadOverviewStats();
    loadUpcomingMatches();
    loadFinishedMatches();
    loadAlgorithms();
    initTabs();
});

// 初始化标签切换
function initTabs() {
    document.querySelectorAll('.tab-btn').forEach(btn => {
        btn.addEventListener('click', () => {
            // 移除所有活动状态
            document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
            document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
            
            // 添加当前活动状态
            btn.classList.add('active');
            const tabId = btn.dataset.tab + '-tab';
            document.getElementById(tabId).classList.add('active');
        });
    });
}

// 加载总体统计
async function loadOverviewStats() {
    try {
        const response = await fetch(`${API_BASE}/api/stats/overview`);
        const result = await response.json();
        
        if (result.success) {
            document.getElementById('total-matches').textContent = result.data.total_matches;
            document.getElementById('upcoming-matches').textContent = result.data.upcoming_matches;
            document.getElementById('active-algorithms').textContent = result.data.active_algorithms;
            document.getElementById('overall-accuracy').textContent = result.data.overall_accuracy.toFixed(1) + '%';
        }
    } catch (error) {
        console.error('加载统计数据失败:', error);
    }
}

// 加载即将进行的比赛
async function loadUpcomingMatches() {
    try {
        const response = await fetch(`${API_BASE}/api/matches?status=upcoming`);
        const result = await response.json();
        
        if (result.success) {
            const container = document.getElementById('upcoming-matches-list');
            
            if (result.data.length === 0) {
                container.innerHTML = '<p style="text-align: center; color: #a0a0a0;">暂无即将进行的比赛</p>';
                return;
            }
            
            // 获取每场比赛的预测
            for (const match of result.data) {
                const predictions = await getMatchPredictions(match.id);
                match.predictions = predictions;
            }
            
            container.innerHTML = result.data.map(match => renderMatchCard(match, false)).join('');
        }
    } catch (error) {
        console.error('加载比赛失败:', error);
    }
}

// 加载已完成的比赛
async function loadFinishedMatches() {
    try {
        const response = await fetch(`${API_BASE}/api/matches?status=finished`);
        const result = await response.json();
        
        if (result.success) {
            const container = document.getElementById('finished-matches-list');
            
            if (result.data.length === 0) {
                container.innerHTML = '<p style="text-align: center; color: #a0a0a0;">暂无已完成的比赛</p>';
                return;
            }
            
            // 获取每场比赛的预测
            for (const match of result.data) {
                const predictions = await getMatchPredictions(match.id);
                match.predictions = predictions;
            }
            
            container.innerHTML = result.data.map(match => renderMatchCard(match, true)).join('');
        }
    } catch (error) {
        console.error('加载比赛失败:', error);
    }
}

// 获取比赛预测
async function getMatchPredictions(matchId) {
    try {
        const response = await fetch(`${API_BASE}/api/matches/${matchId}`);
        const result = await response.json();
        return result.success ? result.data.predictions : [];
    } catch (error) {
        console.error('获取预测失败:', error);
        return [];
    }
}

// 渲染比赛卡片
function renderMatchCard(match, isFinished) {
    const matchTime = match.match_time ? new Date(match.match_time).toLocaleString('zh-CN') : '待定';
    
    let predictionsHtml = '';
    if (match.predictions && match.predictions.length > 0) {
        predictionsHtml = `
            <div class="match-predictions">
                <h4 style="margin-bottom: 10px; color: #a0a0a0; font-size: 13px;">预测结果</h4>
                ${match.predictions.map(pred => {
                    let resultText = '';
                    let resultClass = '';
                    if (isFinished && pred.is_correct !== null) {
                        resultText = pred.is_correct ? '✓ 正确' : '✗ 错误';
                        resultClass = pred.is_correct ? 'correct' : 'wrong';
                    }
                    
                    return `
                        <div class="prediction-item">
                            <span class="prediction-algorithm">${pred.algorithm_name}</span>
                            <span>
                                ${pred.predicted_home_score !== null ? `${pred.predicted_home_score} : ${pred.predicted_away_score}` : ''}
                                ${pred.predicted_winner ? `(${getWinnerText(pred.predicted_winner, match.home_team, match.away_team)})` : ''}
                            </span>
                            ${resultText ? `<span class="prediction-result ${resultClass}">${resultText}</span>` : ''}
                        </div>
                    `;
                }).join('')}
            </div>
        `;
    }
    
    return `
        <div class="match-card" onclick="showMatchDetail(${match.id})">
            <div class="match-header">
                <span class="match-round">${match.round_name || '小组赛'}</span>
                <span class="match-time">${matchTime}</span>
            </div>
            <div class="match-teams">
                <div class="team">
                    <div class="team-name">${match.home_team}</div>
                </div>
                <div class="vs">VS</div>
                <div class="team">
                    <div class="team-name">${match.away_team}</div>
                </div>
            </div>
            ${isFinished && match.home_score !== null ? `
                <div class="match-score">
                    <span class="score-box">${match.home_score}</span>
                    <span>:</span>
                    <span class="score-box">${match.away_score}</span>
                </div>
            ` : ''}
            ${predictionsHtml}
        </div>
    `;
}

// 获取胜负文本
function getWinnerText(winner, homeTeam, awayTeam) {
    if (winner === 'home') return homeTeam + '胜';
    if (winner === 'away') return awayTeam + '胜';
    if (winner === 'draw') return '平局';
    return winner;
}

// 加载算法排行
async function loadAlgorithms() {
    try {
        const response = await fetch(`${API_BASE}/api/algorithms`);
        const result = await response.json();
        
        if (result.success) {
            const container = document.getElementById('algorithms-list');
            
            if (result.data.length === 0) {
                container.innerHTML = '<p style="text-align: center; color: #a0a0a0;">暂无算法数据</p>';
                return;
            }
            
            container.innerHTML = result.data.map(algo => `
                <div class="algorithm-card" onclick="showAlgorithmDetail(${algo.id})">
                    <div class="algorithm-name">${algo.name}</div>
                    <div class="algorithm-desc">${algo.description || '暂无描述'}</div>
                    <div class="algorithm-stats">
                        <div class="algo-stat">
                            <div class="algo-stat-value">${(algo.accuracy || 0).toFixed(1)}%</div>
                            <div class="algo-stat-label">准确率</div>
                        </div>
                        <div class="algo-stat">
                            <div class="algo-stat-value">${algo.total_predictions || 0}</div>
                            <div class="algo-stat-label">预测数</div>
                        </div>
                        <div class="algo-stat">
                            <div class="algo-stat-value">${algo.correct_predictions || 0}</div>
                            <div class="algo-stat-label">正确数</div>
                        </div>
                    </div>
                </div>
            `).join('');
        }
    } catch (error) {
        console.error('加载算法失败:', error);
    }
}

// 显示比赛详情
async function showMatchDetail(matchId) {
    try {
        const response = await fetch(`${API_BASE}/api/matches/${matchId}`);
        const result = await response.json();
        
        if (result.success) {
            const match = result.data.match;
            const predictions = result.data.predictions;
            
            const matchTime = match.match_time ? new Date(match.match_time).toLocaleString('zh-CN') : '待定';
            
            let predictionsHtml = '';
            if (predictions.length > 0) {
                predictionsHtml = `
                    <h3 style="margin-top: 20px; color: #00cec9;">预测详情</h3>
                    <div style="margin-top: 15px;">
                        ${predictions.map(pred => `
                            <div style="background: rgba(0,0,0,0.2); padding: 15px; border-radius: 8px; margin-bottom: 10px;">
                                <div style="display: flex; justify-content: space-between; align-items: center;">
                                    <span style="color: #00cec9; font-weight: bold;">${pred.algorithm_name}</span>
                                    <span style="color: #a0a0a0;">准确率: ${(pred.algorithm_accuracy || 0).toFixed(1)}%</span>
                                </div>
                                <div style="margin-top: 10px; color: #e0e0e0;">
                                    ${pred.predicted_home_score !== null ? 
                                        `预测比分: ${pred.predicted_home_score} : ${pred.predicted_away_score}` : 
                                        ''}
                                    ${pred.predicted_winner ? 
                                        `<br>预测胜负: ${getWinnerText(pred.predicted_winner, match.home_team, match.away_team)}` : 
                                        ''}
                                    ${pred.confidence ? 
                                        `<br>置信度: ${(pred.confidence * 100).toFixed(0)}%` : 
                                        ''}
                                </div>
                                ${match.status === 'finished' && pred.is_correct !== null ? `
                                    <div style="margin-top: 10px; padding: 5px 10px; border-radius: 5px; display: inline-block;
                                        background: ${pred.is_correct ? 'rgba(46, 213, 115, 0.2)' : 'rgba(255, 71, 87, 0.2)'};
                                        color: ${pred.is_correct ? '#2ed573' : '#ff4757'};">
                                        ${pred.is_correct ? '✓ 预测正确' : '✗ 预测错误'}
                                    </div>
                                ` : ''}
                            </div>
                        `).join('')}
                    </div>
                `;
            }
            
            document.getElementById('modal-title').textContent = 
                `${match.home_team} vs ${match.away_team}`;
            
            document.getElementById('modal-body').innerHTML = `
                <div style="text-align: center; margin: 20px 0;">
                    <span class="status-badge ${match.status === 'finished' ? 'status-finished' : 'status-upcoming'}">
                        ${match.status === 'finished' ? '已完成' : '即将进行'}
                    </span>
                </div>
                <div style="text-align: center; color: #a0a0a0; margin-bottom: 15px;">
                    ${match.round_name || '小组赛'} | ${matchTime}
                </div>
                ${match.status === 'finished' && match.home_score !== null ? `
                    <div style="text-align: center; font-size: 36px; margin: 20px 0;">
                        <span style="color: #00cec9;">${match.home_score}</span>
                        <span style="color: #a0a0a0;"> : </span>
                        <span style="color: #00cec9;">${match.away_score}</span>
                    </div>
                ` : ''}
                ${predictionsHtml}
            `;
            
            document.getElementById('match-modal').style.display = 'block';
        }
    } catch (error) {
        console.error('加载比赛详情失败:', error);
    }
}

// 显示算法详情
async function showAlgorithmDetail(algoId) {
    try {
        const response = await fetch(`${API_BASE}/api/algorithms/${algoId}`);
        const result = await response.json();
        
        if (result.success) {
            const algo = result.data.algorithm;
            const history = result.data.history;
            
            let historyHtml = '';
            if (history.length > 0) {
                historyHtml = `
                    <h3 style="margin-top: 25px; color: #00cec9;">预测历史</h3>
                    <div style="max-height: 300px; overflow-y: auto; margin-top: 15px;">
                        ${history.map(h => `
                            <div style="background: rgba(0,0,0,0.2); padding: 12px; border-radius: 8px; margin-bottom: 10px;">
                                <div style="display: flex; justify-content: space-between;">
                                    <span>${h.home_team} vs ${h.away_team}</span>
                                    <span style="color: #a0a0a0; font-size: 12px;">
                                        ${h.match_time ? new Date(h.match_time).toLocaleDateString('zh-CN') : '待定'}
                                    </span>
                                </div>
                                <div style="margin-top: 8px; color: #e0e0e0; font-size: 13px;">
                                    预测: ${h.predicted_home_score} : ${h.predicted_away_score}
                                    ${h.home_score !== null ? ` | 实际: ${h.home_score} : ${h.away_score}` : ''}
                                </div>
                                ${h.is_correct !== null ? `
                                    <span style="margin-top: 5px; padding: 2px 8px; border-radius: 3px; font-size: 12px;
                                        background: ${h.is_correct ? 'rgba(46, 213, 115, 0.2)' : 'rgba(255, 71, 87, 0.2)'};
                                        color: ${h.is_correct ? '#2ed573' : '#ff4757'};">
                                        ${h.is_correct ? '正确' : '错误'}
                                    </span>
                                ` : ''}
                            </div>
                        `).join('')}
                    </div>
                `;
            }
            
            document.getElementById('modal-title').textContent = algo.name;
            document.getElementById('modal-body').innerHTML = `
                <p style="color: #a0a0a0; margin-bottom: 20px;">${algo.description || '暂无描述'}</p>
                <div class="algorithm-stats" style="background: rgba(0,0,0,0.2); padding: 20px; border-radius: 10px;">
                    <div class="algo-stat">
                        <div class="algo-stat-value">${(algo.accuracy || 0).toFixed(1)}%</div>
                        <div class="algo-stat-label">准确率</div>
                    </div>
                    <div class="algo-stat">
                        <div class="algo-stat-value">${algo.total_predictions || 0}</div>
                        <div class="algo-stat-label">总预测数</div>
                    </div>
                    <div class="algo-stat">
                        <div class="algo-stat-value">${algo.correct_predictions || 0}</div>
                        <div class="algo-stat-label">正确预测</div>
                    </div>
                </div>
                ${historyHtml}
            `;
            
            document.getElementById('match-modal').style.display = 'block';
        }
    } catch (error) {
        console.error('加载算法详情失败:', error);
    }
}

// 关闭弹窗
document.querySelectorAll('.close').forEach(btn => {
    btn.addEventListener('click', () => {
        btn.parentElement.parentElement.style.display = 'none';
    });
});

// 点击弹窗外部关闭
window.addEventListener('click', (e) => {
    if (e.target.classList.contains('modal')) {
        e.target.style.display = 'none';
    }
});