from datetime import datetime
from flask import Blueprint, render_template, request, jsonify, redirect, url_for, session

# 导入数据库工具
from db_utils import get_db_connection, close_db_connection

# 创建用户相关的蓝图
bp = Blueprint('user', __name__)

# 初始化数据库（用户相关部分）
def init_user_db():
    conn = get_db_connection()
    cursor = conn.cursor()
    
    # 创建用户表
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS users (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            username TEXT NOT NULL UNIQUE,
            password TEXT NOT NULL,
            name TEXT NOT NULL,
            phone TEXT NOT NULL,
            department TEXT NOT NULL,
            status TEXT DEFAULT 'active'
        )
    ''')
    
    # 检查是否存在admin用户，如果不存在则创建
    cursor.execute("SELECT * FROM users WHERE username = 'admin'")
    if not cursor.fetchone():
        # 创建admin用户，默认密码为'admin123'
        cursor.execute(
            "INSERT INTO users (username, password, name, phone, department) VALUES (?, ?, ?, ?, ?)",
            ('admin', 'admin123', '管理员', '13800138000', '管理部')
        )
    
    # 插入一些测试数据
    cursor.execute("SELECT COUNT(*) FROM users")
    if cursor.fetchone()[0] <= 1:  # 只有admin用户时
        # 插入几个测试用户
        test_users = [
            ('user1', 'password1', '张三', '13800138001', '技术部'),
            ('user2', 'password2', '李四', '13800138002', '销售部'),
            ('user3', 'password3', '王五', '13800138003', '财务部')
        ]
        
        for user in test_users:
            cursor.execute(
                "INSERT INTO users (username, password, name, phone, department) VALUES (?, ?, ?, ?, ?)",
                user
            )
    
    try:
        conn.commit()
    except Exception as e:
        print(f"初始化用户数据库时出错: {e}")
    finally:
        close_db_connection(conn)

# 登录路由
@bp.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        
        # 连接数据库
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 验证用户名和密码
        cursor.execute("SELECT * FROM users WHERE username = ? AND password = ?", (username, password))
        user = cursor.fetchone()
        
        if user:
            # 检查用户状态
            if user[6] != 'active':
                close_db_connection(conn)
                return render_template('login.html', error='用户已被禁用')
            
            # 设置会话信息
            session['username'] = user[1]  # 用户名
            session['name'] = user[3]      # 姓名
            session['department'] = user[5]  # 部门
            session['login_time'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
            
            close_db_connection(conn)
            
            # 登录成功，跳转到查询页面
            return redirect(url_for('query'))
        else:
            close_db_connection(conn)
            return render_template('login.html', error='用户名或密码错误')
    
    return render_template('login.html')

# 注册路由
@bp.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        confirm_password = request.form.get('confirm_password')
        name = request.form.get('name')
        phone = request.form.get('phone')
        department = request.form.get('department')
        
        # 验证参数
        if not username or not password or not confirm_password or not name or not phone or not department:
            return render_template('register.html', error='请填写所有必填字段')
        
        # 验证密码是否一致
        if password != confirm_password:
            return render_template('register.html', error='两次输入的密码不一致')
        
        # 验证密码复杂度
        if len(password) < 8 or not any(c.isalpha() for c in password) or not any(c.isdigit() for c in password):
            return render_template('register.html', error='密码长度至少8位，且必须包含字母和数字')
        
        # 连接数据库，检查用户名是否已存在
        conn = get_db_connection()
        cursor = conn.cursor()
        
        cursor.execute("SELECT * FROM users WHERE username = ?", (username,))
        if cursor.fetchone():
            close_db_connection(conn)
            return render_template('register.html', error='用户名已存在')
        
        try:
            # 插入新用户
            cursor.execute(
                "INSERT INTO users (username, password, name, phone, department) VALUES (?, ?, ?, ?, ?)",
                (username, password, name, phone, department)
            )
            conn.commit()
            close_db_connection(conn)
            
            # 注册成功，跳转到登录页面
            return redirect(url_for('user.login', success='注册成功，请登录'))
        except Exception as e:
            close_db_connection(conn)
            return render_template('register.html', error=f'注册失败：{str(e)}')
    
    return render_template('register.html')

# 获取个人信息路由
@bp.route('/get_user_profile', methods=['GET'])
def get_user_profile():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 连接数据库，获取用户信息
    conn = get_db_connection()
    cursor = conn.cursor()
    
    cursor.execute("SELECT username, name, phone, department FROM users WHERE username = ?", (session['username'],))
    user = cursor.fetchone()
    close_db_connection(conn)
    
    if not user:
        return jsonify({'success': False, 'error': '用户不存在'})
    
    # 构造返回数据
    user_data = {
        'username': user[0],
        'name': user[1],
        'phone': user[2],
        'department': user[3]
    }
    
    return jsonify({'success': True, 'user': user_data})

# 获取所有用户列表的API
@bp.route('/api/users', methods=['GET'])
def get_users():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 只有admin用户才能获取用户列表
    if session['username'] != 'admin':
        return jsonify({'success': False, 'error': '无权限访问'}), 403
    
    # 获取URL参数中的页码、每页数量、排序字段和排序方式
    page = request.args.get('page', 1, type=int)
    page_size = request.args.get('pageSize', 10, type=int)
    sort_field = request.args.get('sortField', 'id')
    sort_order = request.args.get('sortOrder', 'asc')
    department = request.args.get('department', '')
    search = request.args.get('search', '')
    
    # 验证排序字段是否有效
    valid_sort_fields = ['id', 'username', 'name', 'phone', 'department', 'status']
    if sort_field not in valid_sort_fields:
        sort_field = 'id'
    
    # 验证排序方式是否有效
    if sort_order not in ['asc', 'desc']:
        sort_order = 'asc'
    
    # 计算偏移量
    offset = (page - 1) * page_size
    
    try:
        # 连接数据库
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 构建查询条件
        conditions = []
        params = []
        
        if department:
            conditions.append("department = ?")
            params.append(department)
        
        if search:
            conditions.append("(username LIKE ? OR name LIKE ? OR phone LIKE ?)")
            params.extend([f'%{search}%', f'%{search}%', f'%{search}%'])
        
        # 构建SQL查询语句
        where_clause = " AND ".join(conditions) if conditions else ""
        if where_clause:
            where_clause = "WHERE " + where_clause
        
        # 查询用户列表
        cursor.execute(
            f"SELECT id, username, name, phone, department, status FROM users {where_clause} ORDER BY {sort_field} {sort_order} LIMIT ? OFFSET ?",
            params + [page_size, offset]
        )
        users = cursor.fetchall()
        
        # 查询总记录数
        cursor.execute(f"SELECT COUNT(*) FROM users {where_clause}", params)
        total = cursor.fetchone()[0]
        
        # 关闭数据库连接
        close_db_connection(conn)
        
        # 格式化用户数据
        formatted_users = []
        for user in users:
            formatted_users.append({
                'id': user[0],
                'username': user[1],
                'name': user[2],
                'phone': user[3],
                'department': user[4],
                'status': user[5]
            })
        
        # 返回分页结果
        return jsonify({
            'success': True,
            'data': formatted_users,
            'total': total,
            'page': page,
            'pageSize': page_size
        })
    except Exception as e:
        # 确保在异常情况下也关闭连接
        close_db_connection(conn)
        return jsonify({'success': False, 'error': str(e)}), 500

# 更新用户状态路由
@bp.route('/update_user_status', methods=['POST'])
def update_user_status():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 只有admin用户才能更新用户状态
    if session['username'] != 'admin':
        return jsonify({'success': False, 'error': '无权限访问'}), 403
    
    data = request.get_json()
    user_id = data.get('user_id')
    status = data.get('status')
    
    # 验证输入
    if not user_id or not status:
        return jsonify({'success': False, 'error': '缺少必要参数'})
    
    # 不能禁用admin用户
    if user_id == 1:
        return jsonify({'success': False, 'error': '不能修改管理员用户的状态'})
    
    # 更新用户状态
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        cursor.execute("UPDATE users SET status = ? WHERE id = ?", (status, user_id))
        conn.commit()
        close_db_connection(conn)
        
        return jsonify({'success': True, 'message': '用户状态更新成功'})
    except Exception as e:
        close_db_connection(conn)
        return jsonify({'success': False, 'error': f'更新失败：{str(e)}'})

# 更新用户部门路由
@bp.route('/update_user_department', methods=['POST'])
def update_user_department():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 只有admin用户才能更新用户部门
    if session['username'] != 'admin':
        return jsonify({'success': False, 'error': '无权限访问'}), 403
    
    data = request.get_json()
    user_id = data.get('user_id')
    department = data.get('department')
    
    # 验证输入
    if not user_id or not department:
        return jsonify({'success': False, 'error': '缺少必要参数'})
    
    # 更新用户部门
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        cursor.execute("UPDATE users SET department = ? WHERE id = ?", (department, user_id))
        conn.commit()
        close_db_connection(conn)
        
        return jsonify({'success': True, 'message': '部门信息更新成功'})
    except Exception as e:
        close_db_connection(conn)
        return jsonify({'success': False, 'error': f'更新失败：{str(e)}'})

# 重置用户密码路由
@bp.route('/reset_user_password', methods=['POST'])
def reset_user_password():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 只有admin用户才能重置用户密码
    if session['username'] != 'admin':
        return jsonify({'success': False, 'error': '无权限访问'}), 403
    
    data = request.get_json()
    user_id = data.get('user_id')
    username = data.get('username')
    
    # 验证输入
    if not user_id or not username:
        return jsonify({'success': False, 'error': '缺少必要参数'})
    
    # 重置密码为默认值
    default_password = 'default123'
    
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 检查用户ID和用户名是否匹配
        cursor.execute("SELECT id FROM users WHERE username = ?", (username,))
        db_user_id = cursor.fetchone()
        
        if not db_user_id or db_user_id[0] != user_id:
            close_db_connection(conn)
            return jsonify({'success': False, 'error': '用户信息不匹配'})
        
        # 更新users表中的密码
        cursor.execute("UPDATE users SET password = ? WHERE id = ?", (default_password, user_id))
        
        conn.commit()
        close_db_connection(conn)
        
        return jsonify({'success': True, 'message': '密码已初始化为：' + default_password})
    except Exception as e:
        close_db_connection(conn)
        return jsonify({'success': False, 'error': f'密码重置失败：{str(e)}'})

# 登出路由
@bp.route('/logout')
def logout():
    session.clear()
    return redirect(url_for('user.login'))

# 用户管理页面路由
@bp.route('/users_management')
def users_management():
    if 'username' not in session:
        return redirect(url_for('user.login'))
    
    # 只有admin用户才能访问用户管理页面
    if session['username'] != 'admin':
        return redirect(url_for('query'))
    
    # 获取所有部门列表（用于筛选和修改）
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute("SELECT DISTINCT department FROM users")
    departments = [dept[0] for dept in cursor.fetchall()]
    close_db_connection(conn)
    
    return render_template('users_management.html', departments=departments)

# 创建参数配置表（如果不存在）
def create_parameter_config_table():
    conn = get_db_connection()
    cursor = conn.cursor()
    
    # 创建参数配置表
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS parameter_config (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            param1 TEXT,
            param2 TEXT,
            param3 TEXT,
            param4 TEXT,
            param5 TEXT,
            update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        )
    ''')
    
    # 检查是否存在参数配置记录，如果不存在则插入第一条记录
    cursor.execute("SELECT COUNT(*) FROM parameter_config")
    count = cursor.fetchone()[0]
    
    if count == 0:
        cursor.execute(
            "INSERT INTO parameter_config (param1, param2, param3, param4, param5, update_time) VALUES (?, ?, ?, ?, ?, ?)",
            ('默认参数1', '默认参数2', '默认参数3', '默认参数4', '默认参数5', datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
        )
        try:
            conn.commit()
        except Exception as e:
            print(f"插入参数配置数据时出错: {e}")
    
    close_db_connection(conn)

# 获取参数配置路由
@bp.route('/get_parameter_config', methods=['GET'])
def get_parameter_config():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 确保参数配置表存在
    create_parameter_config_table()
    
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 获取最新的参数配置
        cursor.execute("SELECT param1, param2, param3, param4, param5 FROM parameter_config ORDER BY update_time DESC LIMIT 1")
        config = cursor.fetchone()
        close_db_connection(conn)
        
        if not config:
            return jsonify({'success': False, 'error': '未找到参数配置'})
        
        # 构建符合前端期望格式的响应
        parameters = {
            'param1': config[0],
            'param2': config[1],
            'param3': config[2],
            'param4': config[3],
            'param5': config[4],
            'update_time': datetime.now().strftime('%Y-%m-%d %H:%M:%S')
        }
        
        return jsonify({
            'success': True,
            'parameters': parameters
        })
    except Exception as e:
        close_db_connection(conn)
        return jsonify({'success': False, 'error': str(e)})

# 保存参数配置路由
@bp.route('/save_parameter_config', methods=['POST'])
def save_parameter_config():
    if 'username' not in session:
        return jsonify({'success': False, 'error': '未登录'}), 401
    
    # 确保参数配置表存在
    create_parameter_config_table()
    
    data = request.get_json()
    param1 = data.get('param1')
    param2 = data.get('param2')
    param3 = data.get('param3')
    param4 = data.get('param4')
    param5 = data.get('param5')
    
    try:
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 插入新的参数配置记录（不更新旧记录，而是插入新记录）
        cursor.execute(
            "INSERT INTO parameter_config (param1, param2, param3, param4, param5, update_time) VALUES (?, ?, ?, ?, ?, ?)",
            (param1, param2, param3, param4, param5, datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
        )
        conn.commit()
        close_db_connection(conn)
        
        return jsonify({'success': True, 'message': '参数配置保存成功'})
    except Exception as e:
        close_db_connection(conn)
        return jsonify({'success': False, 'error': str(e)})

# 参数配置页面路由
@bp.route('/parameter_config_page')
def parameter_config_page():
    if 'username' not in session:
        return redirect(url_for('user.login'))
    
    return render_template('parameter_config.html')

# 修改密码页面路由
@bp.route('/change_password_page', methods=['GET', 'POST'])
def change_password_page():
    if 'username' not in session:
        return redirect(url_for('user.login'))
    
    if request.method == 'POST':
        old_password = request.form.get('old_password')
        new_password = request.form.get('new_password')
        confirm_password = request.form.get('confirm_password')
        
        # 验证参数
        if not old_password or not new_password or not confirm_password:
            return render_template('change_password.html', error='请填写所有必填字段')
        
        # 验证新密码和确认密码是否一致
        if new_password != confirm_password:
            return render_template('change_password.html', error='两次输入的新密码不一致')
        
        # 验证新密码复杂度
        if len(new_password) < 8 or not any(c.isalpha() for c in new_password) or not any(c.isdigit() for c in new_password):
            return render_template('change_password.html', error='新密码长度至少8位，且必须包含字母和数字')
        
        # 连接数据库，验证旧密码并更新新密码
        conn = get_db_connection()
        cursor = conn.cursor()
        
        # 验证旧密码是否正确
        cursor.execute("SELECT password FROM users WHERE username = ?", (session['username'],))
        result = cursor.fetchone()
        
        if not result or result[0] != old_password:
            close_db_connection(conn)
            return render_template('change_password.html', error='旧密码不正确')
        
        # 更新密码
        try:
            cursor.execute(
                "UPDATE users SET password = ? WHERE username = ?",
                (new_password, session['username'])
            )
            conn.commit()
            close_db_connection(conn)
            
            # 密码修改成功，跳转到登录页面
            return redirect(url_for('user.login', success='密码修改成功，请重新登录'))
        except Exception as e:
            close_db_connection(conn)
            return render_template('change_password.html', error=f'密码修改失败：{str(e)}')
    
    return render_template('change_password.html')

# 个人信息页面路由
@bp.route('/user_profile_page', methods=['GET', 'POST'])
def user_profile_page():
    if 'username' not in session:
        return redirect(url_for('user.login'))
    
    # 连接数据库，获取用户信息
    conn = get_db_connection()
    cursor = conn.cursor()
    cursor.execute("SELECT username, name, phone, department FROM users WHERE username = ?", (session['username'],))
    user_tuple = cursor.fetchone()
    close_db_connection(conn)
    
    if not user_tuple:
        return redirect(url_for('user.login', error='用户不存在'))
    
    # 将元组转换为字典，以便在模板中使用属性访问
    user = {
        'username': user_tuple[0],
        'name': user_tuple[1],
        'phone': user_tuple[2],
        'department': user_tuple[3]
    }
    
    if request.method == 'POST':
        name = request.form.get('name', '').strip()
        phone = request.form.get('phone', '').strip()
        department = request.form.get('department', '').strip()
        
        # 验证参数
        if not name or not phone or not department:
            return render_template('user_profile.html', user=user, error='请填写所有必填字段', current_year=datetime.now().year)
        
        # 连接数据库，更新用户信息
        conn = get_db_connection()
        cursor = conn.cursor()
        
        try:
            cursor.execute(
                "UPDATE users SET name = ?, phone = ?, department = ? WHERE username = ?",
                (name, phone, department, session['username'])
            )
            conn.commit()
            
            # 更新会话中的部门信息
            session['department'] = department
            session['name'] = name
            
            close_db_connection(conn)
            
            # 重新获取用户信息
            conn = get_db_connection()
            cursor = conn.cursor()
            cursor.execute("SELECT username, name, phone, department FROM users WHERE username = ?", (session['username'],))
            updated_user_tuple = cursor.fetchone()
            close_db_connection(conn)
            
            # 将元组转换为字典
            updated_user = {
                'username': updated_user_tuple[0],
                'name': updated_user_tuple[1],
                'phone': updated_user_tuple[2],
                'department': updated_user_tuple[3]
            }
            
            return render_template('user_profile.html', user=updated_user, success='个人信息更新成功', current_year=datetime.now().year)
        except Exception as e:
            close_db_connection(conn)
            return render_template('user_profile.html', user=user, error=f'更新失败，请重试。错误：{str(e)}', current_year=datetime.now().year)
    
    # GET请求，渲染个人信息页面
    return render_template('user_profile.html', user=user, current_year=datetime.now().year)