from flask import Blueprint, request, jsonify, render_template
from flask_login import login_required, current_user
from models import db, UserApiKey, ApiKeyDailyStat
from datetime import datetime, date
import secrets

apikey_bp = Blueprint('apikey', __name__, url_prefix='/user/apikey')


def generate_api_key():
    """生成 API Key"""
    return f"sk_{secrets.token_hex(24)}"


@apikey_bp.route('/')
@login_required
def manage_page():
    """API Key 管理页面"""
    return render_template('apikey/manage.html')


@apikey_bp.route('/list', methods=['GET'])
@login_required
def list_keys():
    """获取用户的 API Key 列表"""
    keys = UserApiKey.query.filter_by(user_id=current_user.id).order_by(UserApiKey.created_at.desc()).all()

    result = []
    for key in keys:
        # 获取今日调用次数
        today_stat = ApiKeyDailyStat.query.filter_by(
            api_key_id=key.id,
            date=date.today()
        ).first()

        result.append({
            'id': key.id,
            'name': key.name,
            'api_key': key.api_key[:12] + '...' + key.api_key[-4:],  # 隐藏中间部分
            'is_active': key.is_active,
            'daily_limit': key.daily_limit,
            'total_calls': key.total_calls,
            'today_calls': today_stat.call_count if today_stat else 0,
            'last_used_at': key.last_used_at.strftime('%Y-%m-%d %H:%M:%S') if key.last_used_at else None,
            'created_at': key.created_at.strftime('%Y-%m-%d %H:%M:%S')
        })

    return jsonify({
        'success': True,
        'data': result
    })


@apikey_bp.route('/create', methods=['POST'])
@login_required
def create_key():
    """创建新的 API Key"""
    data = request.get_json()
    name = data.get('name', '').strip()

    if not name:
        return jsonify({'success': False, 'message': '请输入 Key 名称'}), 400

    if len(name) > 100:
        return jsonify({'success': False, 'message': 'Key 名称不能超过100个字符'}), 400

    # 检查用户已有的 Key 数量（限制每个用户最多5个）
    key_count = UserApiKey.query.filter_by(user_id=current_user.id).count()
    if key_count >= 5:
        return jsonify({'success': False, 'message': '每个用户最多创建5个 API Key'}), 400

    # 生成新的 API Key
    api_key = generate_api_key()

    # 根据用户等级设置每日限制
    daily_limit = 100  # 默认
    if current_user.group:
        if current_user.group.id == 3:  # VIP
            daily_limit = 500
        elif current_user.group.id == 4:  # SVIP
            daily_limit = 2000

    new_key = UserApiKey(
        user_id=current_user.id,
        name=name,
        api_key=api_key,
        daily_limit=daily_limit
    )

    db.session.add(new_key)
    db.session.commit()

    return jsonify({
        'success': True,
        'message': 'API Key 创建成功',
        'data': {
            'id': new_key.id,
            'name': new_key.name,
            'api_key': api_key,  # 只在创建时返回完整的 Key
            'daily_limit': new_key.daily_limit
        }
    })


@apikey_bp.route('/delete/<int:key_id>', methods=['DELETE'])
@login_required
def delete_key(key_id):
    """删除 API Key"""
    key = UserApiKey.query.filter_by(id=key_id, user_id=current_user.id).first()

    if not key:
        return jsonify({'success': False, 'message': 'API Key 不存在'}), 404

    db.session.delete(key)
    db.session.commit()

    return jsonify({
        'success': True,
        'message': 'API Key 已删除'
    })


@apikey_bp.route('/toggle/<int:key_id>', methods=['POST'])
@login_required
def toggle_key(key_id):
    """启用/禁用 API Key"""
    key = UserApiKey.query.filter_by(id=key_id, user_id=current_user.id).first()

    if not key:
        return jsonify({'success': False, 'message': 'API Key 不存在'}), 404

    key.is_active = not key.is_active
    db.session.commit()

    return jsonify({
        'success': True,
        'message': f"API Key 已{'启用' if key.is_active else '禁用'}",
        'is_active': key.is_active
    })


@apikey_bp.route('/stats/<int:key_id>', methods=['GET'])
@login_required
def get_stats(key_id):
    """获取 API Key 统计数据"""
    key = UserApiKey.query.filter_by(id=key_id, user_id=current_user.id).first()

    if not key:
        return jsonify({'success': False, 'message': 'API Key 不存在'}), 404

    # 获取最近7天的统计
    from datetime import timedelta
    stats = ApiKeyDailyStat.query.filter(
        ApiKeyDailyStat.api_key_id == key_id,
        ApiKeyDailyStat.date >= date.today() - timedelta(days=6)
    ).order_by(ApiKeyDailyStat.date.asc()).all()

    result = []
    for stat in stats:
        result.append({
            'date': stat.date.strftime('%Y-%m-%d'),
            'call_count': stat.call_count,
            'success_count': stat.success_count,
            'fail_count': stat.fail_count
        })

    return jsonify({
        'success': True,
        'data': {
            'key_name': key.name,
            'total_calls': key.total_calls,
            'daily_stats': result
        }
    })