require('dotenv').config();
const express = require('express');
const cors = require('cors');
const path = require('path');
const TelegramBot = require('node-telegram-bot-api');
const fs = require('fs');
const moment = require('moment');
const { pool, testConnection } = require('./config/database');
const initDatabase = require('./config/initDb');
const Group = require('./models/Group');
const Transaction = require('./models/Transaction');

const app = express();

// 初始化数据存储
let data = {
    deposits: [], // 入款记录
    withdrawals: [], // 下发记录
    lastUpdate: null,
    allowedGroups: ['4754375683'] // 允许使用的群组ID
};

// 创建机器人实例
const bot = new TelegramBot(process.env.BOT_TOKEN, { polling: true });

// 中间件
app.use(cors());
app.use(express.json());
app.use(express.static('views'));

// 路由
app.get('/', (req, res) => {
    res.sendFile(path.join(__dirname, 'views', 'login.html'));
});

app.use('/api/users', require('./routes/userRoutes'));
app.use('/api/groups', require('./routes/groupRoutes'));
app.use('/api/transactions', require('./routes/transactionRoutes'));

// 检查群组权限
function isGroupAllowed(chatId) {
    const chatIdStr = chatId.toString();
    return data.allowedGroups.includes(chatIdStr) || 
           data.allowedGroups.includes(chatIdStr.replace('-', ''));
}

// 检查是否是管理员
function isAdmin(userId) {
    return process.env.ADMIN_IDS.split(',').includes(userId.toString());
}

// 处理消息发送
async function sendMessage(chatId, text, options = {}) {
    try {
        // 如果包含内联键盘，验证URL
        if (options.reply_markup && options.reply_markup.inline_keyboard) {
            const keyboard = generateInlineKeyboard(chatId);
            if (!keyboard) {
                // 如果键盘无效，发送不带键盘的消息
                return await bot.sendMessage(chatId, text, { parse_mode: 'HTML' });
            }
            options.reply_markup = keyboard;
        }
        return await bot.sendMessage(chatId, text, { ...options, parse_mode: 'HTML' });
    } catch (error) {
        console.error('发送消息失败:', error);
        if (error.message.includes('bot was kicked from the group chat')) {
            const index = data.allowedGroups.indexOf(chatId.toString());
            if (index > -1) {
                data.allowedGroups.splice(index, 1);
                saveData();
                console.log(`群组 ${chatId} 已被移除出允许列表`);
            }
        }
        return null;
    }
}

// 处理快捷命令
bot.on('message', async (msg) => {
    if (!isGroupAllowed(msg.chat.id)) return;

    const text = msg.text?.trim();
    if (!text) return;

    if (text.startsWith('+')) {
        const amount = parseFloat(text.substring(1));
        if (!isNaN(amount)) {
            const transactionData = {
                groupId: msg.chat.id.toString(),
                groupName: msg.chat.title || '未命名群组',
                amount: amount
            };

            try {
                const result = await Transaction.deposit(transactionData);
                if (result.success) {
                    const billMessage = await generateBillMessage(msg.chat.id);
                    if (billMessage) {
                        await sendMessage(msg.chat.id, billMessage, {
                            reply_markup: generateInlineKeyboard(msg.chat.id)
                        });
                        console.log(`入款成功 - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
                    } else {
                        await sendMessage(msg.chat.id, '入款成功，但获取账单信息失败');
                        console.log(`入款成功(无账单) - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
                    }
                } else {
                    await sendMessage(msg.chat.id, result.message || '入款失败');
                    console.log(`入款失败 - 群组: ${msg.chat.title}, 金额: ${amount}, 原因: ${result.message}, 时间: ${new Date().toLocaleString()}`);
                }
            } catch (error) {
                console.error('快捷入款失败:', error);
                await sendMessage(msg.chat.id, '记录入款失败，请稍后重试');
            }
        }
    } else if (text.startsWith('-')) {
        const amount = parseFloat(text.substring(1));
        if (!isNaN(amount)) {
            const transactionData = {
                groupId: msg.chat.id.toString(),
                groupName: msg.chat.title || '未命名群组',
                amount: amount
            };

            try {
                const result = await Transaction.withdrawal(transactionData);
                if (result.success) {
                    const billMessage = await generateBillMessage(msg.chat.id);
                    if (billMessage) {
                        await sendMessage(msg.chat.id, billMessage, {
                            reply_markup: generateInlineKeyboard(msg.chat.id)
                        });
                        console.log(`出款成功 - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
                    } else {
                        await sendMessage(msg.chat.id, '出款成功，但获取账单信息失败');
                        console.log(`出款成功(无账单) - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
                    }
                } else {
                    await sendMessage(msg.chat.id, result.message || '出款失败');
                    console.log(`出款失败 - 群组: ${msg.chat.title}, 金额: ${amount}, 原因: ${result.message}, 时间: ${new Date().toLocaleString()}`);
                }
            } catch (error) {
                console.error('快捷出款失败:', error);
                await sendMessage(msg.chat.id, '记录出款失败，请稍后重试');
            }
        }
    }
});

// 处理新成员加入
bot.on('new_chat_members', async (msg) => {
    const chatId = msg.chat.id;
    const newMembers = msg.new_chat_members;
    
    for (const member of newMembers) {
        if (member.id === (await bot.getMe()).id) {
            // 机器人被添加到群组
            console.log(`机器人被添加到群组: ${chatId}`);
            
            // 检查群组是否在允许列表中
            const chatIdStr = chatId.toString();
            try {
                // 先检查数据库中是否存在该群组
                const existingGroup = await Group.findByGroupId(chatIdStr);
                
                if (existingGroup) {
                    // 如果群组存在，更新群组状态为活跃，同时更新群组名称和加入时间
                    await pool.query(`
                        UPDATE groups 
                        SET is_active = true,
                            group_name = ?,
                            last_join_time = CURRENT_TIMESTAMP
                        WHERE group_id = ?
                    `, [msg.chat.title || existingGroup.group_name, chatIdStr]);

                    // 更新内存中的群组列表
                    if (!data.allowedGroups.includes(chatIdStr)) {
                        data.allowedGroups.push(chatIdStr);
                        saveData();
                    }
                    // 发送欢迎消息并显示当前账单
                    await sendMessage(chatId, '感谢重新添加我为群组成员！');
                    const billMessage = await generateBillMessage(chatId);
                    if (billMessage) {
                        await sendMessage(chatId, billMessage, {
                            reply_markup: generateInlineKeyboard(chatId)
                        });
                    }
                } else {
                    // 如果群组不存在，创建新群组
                    const groupData = {
                        groupId: chatIdStr,
                        groupName: msg.chat.title || '未命名群组',
                        groupType: msg.chat.type === 'private' ? 'personal' : 'public',
                        creatorId: msg.from.id.toString()
                    };
                    
                    const id = await Group.create({ 
                        groupId: groupData.groupId, 
                        groupName: groupData.groupName,
                        creatorId: groupData.creatorId
                    });  
                    const group = await Group.findById(id);

                    if (group) {
                        // 更新内存中的群组列表
                        data.allowedGroups.push(chatIdStr);
                        saveData();
                        await sendMessage(chatId, '感谢添加我为群组成员！使用 /help 查看可用命令。');
                    } else {
                        await sendMessage(chatId, '添加群组失败，请联系管理员。');
                    }
                }
            } catch (error) {
                console.error('处理群组加入失败:', error);
                await sendMessage(chatId, '添加群组失败，请联系管理员。');
            }
        } else {
            // 其他新成员
            console.log(`新成员加入群组: ${member.username || member.first_name} (${member.id})`);
            await sendMessage(chatId, `欢迎 ${member.username || member.first_name} 加入群组！`);
        }
    }
});

// 处理管理员命令
bot.onText(/\/addgroup (.+)/, async (msg, match) => {
    if (!isAdmin(msg.from.id)) {
        sendMessage(msg.chat.id, '您没有权限执行此命令。');
        return;
    }

    const groupId = match[1].trim();
    if (!data.allowedGroups.includes(groupId)) {
        try {
            // 使用 createGroup 创建新群组
            const groupData = {
                groupId: groupId,
                groupName: '手动添加的群组',
                groupType: 'public',
                creatorId: msg.from.id.toString()
            };
            
            const result = await createGroup({ body: groupData });
            if (result) {
                data.allowedGroups.push(groupId);
                saveData();
                sendMessage(msg.chat.id, `群组 ${groupId} 已添加到允许列表。`);
            } else {
                sendMessage(msg.chat.id, '添加群组失败，请检查群组ID是否正确。');
            }
        } catch (error) {
            console.error('创建群组失败:', error);
            sendMessage(msg.chat.id, '添加群组失败，请稍后重试。');
        }
    } else {
        sendMessage(msg.chat.id, '该群组已在允许列表中。');
    }
});

bot.onText(/\/removegroup (.+)/, async (msg, match) => {
    if (!isAdmin(msg.from.id)) {
        sendMessage(msg.chat.id, '您没有权限执行此命令。');
        return;
    }

    const groupId = match[1].trim();
    try {
        // 使用 updateGroup 更新群组状态
        const result = await updateGroup({ 
            params: { id: groupId },
            body: { isActive: false }
        });
        
        if (result) {
            const index = data.allowedGroups.indexOf(groupId);
            if (index > -1) {
                data.allowedGroups.splice(index, 1);
                saveData();
                sendMessage(msg.chat.id, `群组 ${groupId} 已从允许列表中移除。`);
            } else {
                sendMessage(msg.chat.id, '该群组不在允许列表中。');
            }
        } else {
            sendMessage(msg.chat.id, '移除群组失败，请稍后重试。');
        }
    } catch (error) {
        console.error('更新群组状态失败:', error);
        sendMessage(msg.chat.id, '移除群组失败，请稍后重试。');
    }
});

bot.onText(/\/listgroups/, async (msg) => {
    if (!isAdmin(msg.from.id)) {
        sendMessage(msg.chat.id, '您没有权限执行此命令。');
        return;
    }

    try {
        const groups = await pool.query('SELECT group_id, group_name, group_type, is_active FROM groups WHERE is_active = 1');
        if (groups.length === 0) {
            sendMessage(msg.chat.id, '当前没有允许的群组。');
            return;
        }

        const groupsList = groups.map(group => 
            `ID: ${group.group_id}\n名称: ${group.group_name}\n类型: ${group.group_type}\n状态: ${group.is_active ? '启用' : '禁用'}`
        ).join('\n\n');
        
        sendMessage(msg.chat.id, `允许的群组列表：\n\n${groupsList}`);
    } catch (error) {
        console.error('获取群组列表失败:', error);
        sendMessage(msg.chat.id, '获取群组列表失败，请稍后重试。');
    }
});

// 处理入款命令
bot.onText(/\/deposit (.+)/, async (msg, match) => {
    if (!isGroupAllowed(msg.chat.id)) {
        sendMessage(msg.chat.id, '该群组未授权使用此功能');
        return;
    }

    const amount = parseFloat(match[1]);
    if (isNaN(amount)) {
        sendMessage(msg.chat.id, '请输入有效的金额');
        return;
    }

    const transactionData = {
        groupId: msg.chat.id.toString(),
        groupName: msg.chat.title || '未命名群组',
        amount: amount
    };

    try {
        const result = await Transaction.deposit(transactionData);
        if (result.success) {
            const billMessage = await generateBillMessage(msg.chat.id);
            if (billMessage) {
                await sendMessage(msg.chat.id, billMessage, {
                    reply_markup: generateInlineKeyboard(msg.chat.id)
                });
                console.log(`入款成功 - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
            } else {
                await sendMessage(msg.chat.id, '入款成功，但获取账单信息失败');
                console.log(`入款成功(无账单) - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
            }
        } else {
            await sendMessage(msg.chat.id, result.message || '入款失败');
            console.log(`入款失败 - 群组: ${msg.chat.title}, 金额: ${amount}, 原因: ${result.message}, 时间: ${new Date().toLocaleString()}`);
        }
    } catch (error) {
        console.error('记录入款失败:', error);
        await sendMessage(msg.chat.id, '记录入款失败，请稍后重试');
    }
});

// 处理下发命令
bot.onText(/\/withdraw (.+)/, async (msg, match) => {
    if (!isGroupAllowed(msg.chat.id)) {
        sendMessage(msg.chat.id, '该群组未授权使用此功能');
        return;
    }

    const amount = parseFloat(match[1]);
    if (isNaN(amount)) {
        sendMessage(msg.chat.id, '请输入有效的金额');
        return;
    }

    const transactionData = {
        groupId: msg.chat.id.toString(),
        groupName: msg.chat.title || '未命名群组',
        amount: amount
    };

    try {
        const result = await Transaction.withdrawal(transactionData);
        if (result.success) {
            const billMessage = await generateBillMessage(msg.chat.id);
            if (billMessage) {
                await sendMessage(msg.chat.id, billMessage, {
                    reply_markup: generateInlineKeyboard(msg.chat.id)
                });
                console.log(`出款成功 - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
            } else {
                await sendMessage(msg.chat.id, '出款成功，但获取账单信息失败');
                console.log(`出款成功(无账单) - 群组: ${msg.chat.title}, 金额: ${amount}, 时间: ${new Date().toLocaleString()}`);
            }
        } else {
            await sendMessage(msg.chat.id, result.message || '出款失败');
            console.log(`出款失败 - 群组: ${msg.chat.title}, 金额: ${amount}, 原因: ${result.message}, 时间: ${new Date().toLocaleString()}`);
        }
    } catch (error) {
        console.error('记录出款失败:', error);
        await sendMessage(msg.chat.id, '记录出款失败，请稍后重试');
    }
});

// 处理查看账单命令
bot.onText(/\/bill/, async (msg) => {
    const billMessage = await generateBillMessage(msg.chat.id);
    sendMessage(msg.chat.id, billMessage, {
        reply_markup: generateInlineKeyboard(msg.chat.id)
    });
});

// 更新帮助命令
bot.onText(/\/help/, (msg) => {
    const helpMessage = `
🤖 *机器人使用指南*

📝 *基础命令*
• /deposit <金额> - 记录入款
• /withdraw <金额> - 记录下发
• /bill - 查看当前账单
• /help - 显示此帮助信息

⚡️ *快捷命令*
• +<金额> - 快速记录入款（例如：+2000）
• -<金额> - 快速记录下发（例如：-2000）

👨‍💼 *管理员命令*
• /addgroup <群组ID> - 添加允许的群组
• /removegroup <群组ID> - 移除允许的群组
• /listgroups - 列出所有允许的群组

💡 *使用提示*
• 所有金额输入请使用数字
• 账单信息实时更新
• 如需帮助请联系管理员
    `;
    sendMessage(msg.chat.id, helpMessage, { parse_mode: 'Markdown' });
});

// 生成账单消息
async function generateBillMessage(chatId) {
    try {
        // 获取群组的最后加入时间
        const [groupInfo] = await pool.query(
            'SELECT last_join_time FROM groups WHERE group_id = ?',
            [chatId.toString()]
        );

        if (!groupInfo || groupInfo.length === 0) {
            return '暂无交易记录';
        }

        const lastJoinTime = groupInfo[0].last_join_time;

        // 获取机器人加入后的交易记录
        const [records] = await pool.query(`
            SELECT * FROM transactions 
            WHERE group_id = ? 
            AND time >= ?
            ORDER BY time DESC
            LIMIT 10
        `, [chatId.toString(), lastJoinTime]);

        if (!records || records.length === 0) {
            return '暂无交易记录';
        }

        const deposits = records.filter(r => r.type === 'deposit');
        const withdrawals = records.filter(r => r.type === 'withdrawal');
        
        const totalDeposit = deposits.reduce((sum, d) => sum + parseFloat(d.amount), 0);
        const totalWithdrawal = withdrawals.reduce((sum, w) => sum + parseFloat(w.amount), 0);
        const depositFee = totalDeposit * (process.env.DEPOSIT_FEE_RATE || 0);
        const withdrawalFee = totalWithdrawal * (process.env.WITHDRAWAL_FEE_RATE || 0);
        const remaining = totalDeposit - depositFee - totalWithdrawal - withdrawalFee;

        let message = `📊 *账单明细*\n\n`;

        // 添加入款记录
        if (deposits.length > 0) {
            message += `💰 *入款记录* (${deposits.length}笔)\n`;
            deposits.forEach(deposit => {
                message += `• <code>${moment(deposit.time).format('HH:mm:ss')}</code> | ${parseFloat(deposit.amount).toFixed(2)}\n`;
            });
            message += '\n';
        }

        // 添加下发记录
        if (withdrawals.length > 0) {
            message += `💸 *下发记录* (${withdrawals.length}笔)\n`;
            withdrawals.forEach(withdrawal => {
                message += `• <code>${moment(withdrawal.time).format('HH:mm:ss')}</code> | ${parseFloat(withdrawal.amount).toFixed(2)}\n`;
            });
            message += '\n';
        }

        // 添加统计信息
        message += `📈 *统计信息*\n`;
        message += `• 总入款：${totalDeposit.toFixed(2)}\n`;
        message += `• 入款费率：${((process.env.DEPOSIT_FEE_RATE || 0) * 100).toFixed(1)}%\n`;
        message += `• 下发费率：${((process.env.WITHDRAWAL_FEE_RATE || 0) * 100).toFixed(1)}%\n`;
        message += `• 应下发：${(totalDeposit - depositFee).toFixed(2)}\n`;
        message += `• 总下发：${totalWithdrawal.toFixed(2)}\n`;
        message += `• 下发单笔附加费：0.0\n`;
        message += `• 单笔附费加总计：0.0\n\n`;
        message += `💵 *余额：${remaining.toFixed(2)}*`;

        return message;
    } catch (error) {
        console.error('生成账单消息失败:', error);
        return '获取账单信息失败，请稍后重试';
    }
}

// 生成内联键盘
function generateInlineKeyboard(chatId) {
    const keyboard = {
        inline_keyboard: [
            [
                {
                    text: '点击跳转完整账单',
                    callback_data: `bill_page_${chatId}`
                }
            ],
            [
                {
                    text: '24小时商务对接',
                    callback_data: 'business_contact'
                }
            ]
        ]
    };
    return keyboard;
}

// 处理内联按钮回调
bot.on('callback_query', async (callbackQuery) => {
    const chatId = callbackQuery.message.chat.id;
    const data = callbackQuery.data;

    try {
        if (data.startsWith('bill_page_')) {
            const groupId = data.split('_')[2];
            await bot.answerCallbackQuery(callbackQuery.id, {
                url: `${process.env.BILL_PAGE_BASE_URL}?groupId=${groupId}`
            });
        } else if (data === 'business_contact') {
            await bot.answerCallbackQuery(callbackQuery.id, {
                url: 'https://t.me/your_business_account'
            });
        }
    } catch (error) {
        console.error('处理内联按钮回调失败:', error);
        await bot.answerCallbackQuery(callbackQuery.id, {
            text: '操作失败，请稍后重试',
            show_alert: true
        });
    }
});

// 保存数据
function saveData() {
    try {
        fs.writeFileSync(process.env.DB_FILE, JSON.stringify(data, null, 2));
    } catch (error) {
        console.error('Error saving data:', error);
    }
}

// 加载数据
function loadData() {
    try {
        if (fs.existsSync(process.env.DB_FILE)) {
            const savedData = JSON.parse(fs.readFileSync(process.env.DB_FILE));
            data = { ...data, ...savedData };
        }
    } catch (error) {
        console.error('Error loading data:', error);
    }
}

// 测试数据库连接并初始化
testConnection().then(() => {
    return initDatabase();
}).then(() => {
    // 加载数据
    loadData();
    
    // 启动服务器
    const PORT = process.env.PORT || 3000;
    app.listen(PORT, () => {
        console.log(`服务器运行在端口 ${PORT}`);
        console.log('机器人已准备就绪！');
    });
}).catch(error => {
    console.error('启动失败:', error);
    process.exit(1);
});