# -*- coding: utf-8 -*-
"""ToNav - 个人导航页系统"""

from flask import Flask, render_template, request, jsonify, session, redirect, url_for
import sqlite3
import json
import os
from config import Config
from utils.auth import authenticate, is_logged_in, hash_password
from utils.health_check import health_worker, check_all_services
from utils.database import init_database, insert_initial_data

# 创建 Flask 应用
app = Flask(__name__)
app.config.from_object(Config)

# 初始化数据库
if not os.path.exists(Config.DATABASE_PATH):
    init_database()
    insert_initial_data()

# 启动健康检查线程
health_worker.start()

# ==================== 数据库辅助函数 ====================

def get_db():
    """获取数据库连接"""
    conn = sqlite3.connect(Config.DATABASE_PATH)
    conn.row_factory = sqlite3.Row
    return conn

# ==================== 前台导航页 ====================

@app.route('/')
def index():
    """前台导航页"""
    return render_template('index.html')

@app.route('/api/services')
def api_services():
    """获取所有启用的服务"""
    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        SELECT id, name, url, description, icon, category, sort_order,
               health_check_enabled
        FROM services
        WHERE is_enabled = 1
        ORDER BY sort_order DESC, id ASC
    ''')

    services = [dict(row) for row in cursor.fetchall()]
    conn.close()

    return jsonify(services)

@app.route('/api/categories')
def api_categories():
    """获取所有分类"""
    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        SELECT name, sort_order
        FROM categories
        ORDER BY sort_order DESC, id ASC
    ''')

    categories = [dict(row) for row in cursor.fetchall()]
    conn.close()

    return jsonify(categories)

# ==================== 管理后台 ====================

@app.route('/admin')
def admin_dashboard():
    """管理后台首页"""
    if not is_logged_in(session):
        return redirect(url_for('admin_login'))

    return render_template('admin/dashboard.html')

@app.route('/admin/login', methods=['GET', 'POST'])
def admin_login():
    """登录页"""
    if request.method == 'GET':
        return render_template('admin/login.html')

    username = request.form.get('username', '')
    password = request.form.get('password', '')

    user = authenticate(username, password)
    if user:
        session['user_id'] = user['id']
        session['username'] = user['username']
        return redirect(url_for('admin_dashboard'))

    return render_template('admin/login.html', error='用户名或密码错误')

@app.route('/admin/logout')
def admin_logout():
    """退出登录"""
    session.clear()
    return redirect(url_for('admin_login'))

@app.route('/admin/services')
def admin_services():
    """服务管理页"""
    if not is_logged_in(session):
        return redirect(url_for('admin_login'))

    return render_template('admin/services.html')

@app.route('/admin/categories')
def admin_categories():
    """分类管理页"""
    if not is_logged_in(session):
        return redirect(url_for('admin_login'))

    return render_template('admin/categories.html')

# ==================== 后台 API ====================

@app.route('/api/admin/login/status')
def api_login_status():
    """检查登录状态"""
    if is_logged_in(session):
        return jsonify({'logged_in': True, 'username': session.get('username')})
    return jsonify({'logged_in': False})

@app.route('/api/admin/services', methods=['GET'])
def api_admin_services():
    """获取所有服务（包含禁用的）"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        SELECT id, name, url, description, icon, category, is_enabled,
               sort_order, health_check_url, health_check_enabled
        FROM services
        ORDER BY sort_order DESC, id ASC
    ''')

    services = [dict(row) for row in cursor.fetchall()]
    conn.close()

    return jsonify(services)

@app.route('/api/admin/services', methods=['POST'])
def api_admin_create_service():
    """创建服务"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    data = request.get_json()
    required_fields = ['name', 'url']
    for field in required_fields:
        if not data.get(field):
            return jsonify({'error': f'缺少字段: {field}'}), 400

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        INSERT INTO services (name, url, description, icon, category,
                            is_enabled, sort_order, health_check_url,
                            health_check_enabled)
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
    ''', (
        data['name'],
        data['url'],
        data.get('description', ''),
        data.get('icon', ''),
        data.get('category', '默认'),
        1 if data.get('is_enabled', True) else 0,
        data.get('sort_order', 0),
        data.get('health_check_url', ''),
        1 if data.get('health_check_enabled', False) else 0
    ))

    conn.commit()
    service_id = cursor.lastrowid
    conn.close()

    return jsonify({'id': service_id, 'message': '创建成功'})

@app.route('/api/admin/services/<int:service_id>', methods=['PUT'])
def api_admin_update_service(service_id):
    """更新服务"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    data = request.get_json()

    conn = get_db()
    cursor = conn.cursor()

    # 动态构建更新语句
    fields = []
    values = []

    for field in ['name', 'url', 'description', 'icon', 'category',
                  'is_enabled', 'sort_order', 'health_check_url',
                  'health_check_enabled']:
        if field in data:
            fields.append(f"{field} = ?")
            values.append(data[field])

    if not fields:
        return jsonify({'error': '没有要更新的字段'}), 400

    values.append(service_id)

    cursor.execute(f'''
        UPDATE services
        SET {', '.join(fields)}, updated_at = CURRENT_TIMESTAMP
        WHERE id = ?
    ''', values)

    conn.commit()
    conn.close()

    return jsonify({'message': '更新成功'})

@app.route('/api/admin/services/<int:service_id>', methods=['DELETE'])
def api_admin_delete_service(service_id):
    """删除服务"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('DELETE FROM services WHERE id = ?', (service_id,))

    conn.commit()
    conn.close()

    return jsonify({'message': '删除成功'})

@app.route('/api/admin/services/<int:service_id>/toggle', methods=['POST'])
def api_admin_toggle_service(service_id):
    """切换服务启用状态"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        UPDATE services
        SET is_enabled = 1 - is_enabled
        WHERE id = ?
    ''', (service_id,))

    conn.commit()
    conn.close()

    return jsonify({'message': '状态切换成功'})

# ==================== 分类管理 API ====================

@app.route('/api/admin/categories', methods=['GET'])
def api_admin_categories():
    """获取所有分类"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        SELECT id, name, sort_order
        FROM categories
        ORDER BY sort_order DESC, id ASC
    ''')

    categories = [dict(row) for row in cursor.fetchall()]
    conn.close()

    return jsonify(categories)

@app.route('/api/admin/categories', methods=['POST'])
def api_admin_create_category():
    """创建分类"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    data = request.get_json()
    name = data.get('name', '').strip()

    if not name:
        return jsonify({'error': '分类名称不能为空'}), 400

    conn = get_db()
    cursor = conn.cursor()

    try:
        cursor.execute('''
            INSERT INTO categories (name, sort_order)
            VALUES (?, ?)
        ''', (name, data.get('sort_order', 0)))

        conn.commit()
        category_id = cursor.lastrowid
        conn.close()

        return jsonify({'id': category_id, 'message': '创建成功'})
    except sqlite3.IntegrityError:
        conn.close()
        return jsonify({'error': '分类名称已存在'}), 400

@app.route('/api/admin/categories/<int:category_id>', methods=['PUT'])
def api_admin_update_category(category_id):
    """更新分类"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    data = request.get_json()

    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        UPDATE categories
        SET name = ?, sort_order = ?
        WHERE id = ?
    ''', (
        data.get('name', ''),
        data.get('sort_order', 0),
        category_id
    ))

    conn.commit()
    conn.close()

    return jsonify({'message': '更新成功'})

@app.route('/api/admin/categories/<int:category_id>', methods=['DELETE'])
def api_admin_delete_category(category_id):
    """删除分类"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    # 检查是否有服务使用该分类
    conn = get_db()
    cursor = conn.cursor()

    cursor.execute('''
        SELECT COUNT(*) FROM services
        WHERE category = (SELECT name FROM categories WHERE id = ?)
    ''', (category_id,))

    count = cursor.fetchone()[0]
    if count > 0:
        conn.close()
        return jsonify({'error': f'该分类下有 {count} 个服务，无法删除'}), 400

    cursor.execute('DELETE FROM categories WHERE id = ?', (category_id,))

    conn.commit()
    conn.close()

    return jsonify({'message': '删除成功'})

# ==================== 健康检查 API ====================

@app.route('/api/admin/health-check', methods=['POST'])
def api_admin_health_check():
    """手动触发全量健康检查"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    results = check_all_services()
    return jsonify({'results': results})

# ==================== 系统设置 API ====================

@app.route('/api/admin/change-password', methods=['POST'])
def api_admin_change_password():
    """修改密码"""
    if not is_logged_in(session):
        return jsonify({'error': '未登录'}), 401

    data = request.get_json()
    old_password = data.get('old_password', '')
    new_password = data.get('new_password', '')

    if not old_password or not new_password:
        return jsonify({'error': '密码不能为空'}), 400

    if len(new_password) < 6:
        return jsonify({'error': '新密码长度至少6位'}), 400

    conn = get_db()
    cursor = conn.cursor()

    user_id = session['user_id']

    cursor.execute('''
        SELECT password_hash FROM users WHERE id = ?
    ''', (user_id,))

    row = cursor.fetchone()
    if not row or not is_logged_in(session):
        conn.close()
        return jsonify({'error': '用户不存在'}), 404

    if row[0] != hash_password(old_password):
        conn.close()
        return jsonify({'error': '旧密码错误'}), 400

    new_hash = hash_password(new_password)
    cursor.execute('''
        UPDATE users SET password_hash = ? WHERE id = ?
    ''', (new_hash, user_id))

    conn.commit()
    conn.close()

    return jsonify({'message': '密码修改成功，请重新登录'})

# ==================== 主入口 ====================

if __name__ == '__main__':
    app.run(
        host=Config.HOST,
        port=Config.PORT,
        debug=Config.DEBUG
    )