from flask import Flask, request, jsonify
from flask_cors import CORS
import uuid
import random

app = Flask(__name__)
CORS(app)

# 模拟数据存储
alert_rules = [
    {
        "id": str(uuid.uuid4()),
        "ruleName": "库存告警规则1",
        "metric": "stock",
        "threshold": 100,
        "recipients": "admin@example.com,manager@example.com",
        "status": "enabled"
    },
    {
        "id": str(uuid.uuid4()),
        "ruleName": "价格告警规则1",
        "metric": "price",
        "threshold": 1000,
        "recipients": "finance@example.com",
        "status": "disabled"
    },
    {
        "id": str(uuid.uuid4()),
        "ruleName": "库存告警规则2",
        "metric": "stock",
        "threshold": 50,
        "recipients": "warehouse@example.com",
        "status": "enabled"
    }
]

def filter_rules(keyword="", status=""):
    """根据关键词和状态过滤规则"""
    filtered = alert_rules
    
    if keyword:
        filtered = [rule for rule in filtered if keyword.lower() in rule["ruleName"].lower()]
    
    if status:
        filtered = [rule for rule in filtered if rule["status"] == status]
    
    return filtered

@app.route('/api/v1/alert-rules', methods=['GET'])
def get_alert_rules():
    """获取告警规则列表"""
    page_size = int(request.args.get('pageSize', 10))
    page_num = int(request.args.get('pageNum', 1))
    keyword = request.args.get('keyword', '')
    status = request.args.get('status', '')
    
    # 过滤数据
    filtered_rules = filter_rules(keyword, status)
    
    # 分页
    start = (page_num - 1) * page_size
    end = start + page_size
    page_rules = filtered_rules[start:end]
    
    return jsonify({
        "code": 200,
        "message": "success",
        "data": {
            "list": page_rules,
            "total": len(filtered_rules)
        }
    })

@app.route('/api/v1/alert-rules', methods=['POST'])
def create_alert_rule():
    """创建告警规则"""
    data = request.json
    
    new_rule = {
        "id": str(uuid.uuid4()),
        "ruleName": data.get("ruleName"),
        "metric": data.get("metric"),
        "threshold": data.get("threshold"),
        "recipients": data.get("recipients"),
        "status": "enabled"
    }
    
    alert_rules.append(new_rule)
    
    return jsonify({
        "code": 200,
        "message": "success",
        "data": {
            "id": new_rule["id"],
            "ruleName": new_rule["ruleName"]
        }
    })

@app.route('/api/v1/alert-rules/<rule_id>', methods=['PUT'])
def update_alert_rule(rule_id):
    """更新告警规则"""
    data = request.json
    
    for rule in alert_rules:
        if rule["id"] == rule_id:
            rule["ruleName"] = data.get("ruleName", rule["ruleName"])
            rule["metric"] = data.get("metric", rule["metric"])
            rule["threshold"] = data.get("threshold", rule["threshold"])
            rule["recipients"] = data.get("recipients", rule["recipients"])
            
            return jsonify({
                "code": 200,
                "message": "success",
                "data": {
                    "id": rule["id"],
                    "ruleName": rule["ruleName"]
                }
            })
    
    return jsonify({
        "code": 404,
        "message": "Rule not found"
    }), 404

@app.route('/api/v1/alert-rules/<rule_id>/status', methods=['PUT'])
def update_rule_status(rule_id):
    """更新告警规则状态"""
    data = request.json
    status = data.get("status")
    
    for rule in alert_rules:
        if rule["id"] == rule_id:
            rule["status"] = status
            
            return jsonify({
                "code": 200,
                "message": "success",
                "data": {
                    "id": rule["id"],
                    "status": rule["status"]
                }
            })
    
    return jsonify({
        "code": 404,
        "message": "Rule not found"
    }), 404

@app.route('/api/v1/alert-rules/<rule_id>', methods=['DELETE'])
def delete_alert_rule(rule_id):
    """删除告警规则"""
    global alert_rules
    
    for i, rule in enumerate(alert_rules):
        if rule["id"] == rule_id:
            del alert_rules[i]
            
            return jsonify({
                "code": 200,
                "message": "删除成功",
                "data": {
                    "message": "删除成功"
                }
            })
    
    return jsonify({
        "code": 404,
        "message": "Rule not found"
    }), 404

if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0', port=5000)