from flask import Flask, request, jsonify
from flask_cors import CORS
import random
import string
from datetime import datetime, timedelta
import uuid

app = Flask(__name__)
CORS(app)

# 模拟数据
devices_data = []
farms_data = [
    {"id": "farm1", "name": "农场1"},
    {"id": "farm2", "name": "农场2"}
]

# 生成模拟设备数据
def generate_mock_devices():
    global devices_data
    devices_data = []
    
    for i in range(50):
        device_id = str(uuid.uuid4())
        device_code = f"DEV{str(i+1).zfill(4)}"
        device_name = f"设备{i+1}"
        device_type = random.choice(["typeA", "typeB"])
        status = random.choice(["online", "offline"])
        farm = random.choice(farms_data)
        
        # 生成最后活跃时间
        if status == "online":
            last_active = datetime.now() - timedelta(minutes=random.randint(1, 60))
        else:
            last_active = datetime.now() - timedelta(hours=random.randint(1, 48))
        
        device = {
            "id": device_id,
            "deviceCode": device_code,
            "deviceName": device_name,
            "type": device_type,
            "status": status,
            "lastActiveTime": last_active.strftime("%Y-%m-%d %H:%M:%S"),
            "farmId": farm["id"],
            "farmName": farm["name"]
        }
        devices_data.append(device)

# 初始化数据
generate_mock_devices()

@app.route('/api/v1/devices', methods=['GET'])
def get_devices():
    # 获取查询参数
    farm_id = request.args.get('farmId', '')
    device_type = request.args.get('type', '')
    status = request.args.get('status', '')
    page = int(request.args.get('page', 1))
    size = int(request.args.get('size', 20))
    sort_field = request.args.get('sortField', '')
    sort_order = request.args.get('sortOrder', '')
    
    # 过滤数据
    filtered_devices = devices_data.copy()
    
    if farm_id:
        filtered_devices = [d for d in filtered_devices if d['farmId'] == farm_id]
    
    if device_type:
        filtered_devices = [d for d in filtered_devices if d['type'] == device_type]
    
    if status:
        filtered_devices = [d for d in filtered_devices if d['status'] == status]
    
    # 排序
    if sort_field and sort_field in ['deviceCode', 'deviceName']:
        reverse = sort_order == 'desc'
        filtered_devices.sort(key=lambda x: x[sort_field], reverse=reverse)
    
    # 分页
    total = len(filtered_devices)
    start = (page - 1) * size
    end = start + size
    page_devices = filtered_devices[start:end]
    
    return jsonify({
        "list": page_devices,
        "total": total
    })

@app.route('/api/v1/devices', methods=['POST'])
def add_device():
    data = request.get_json()
    
    device_id = str(uuid.uuid4())
    farm = next((f for f in farms_data if f['id'] == data['farmId']), farms_data[0])
    
    new_device = {
        "id": device_id,
        "deviceCode": data['deviceCode'],
        "deviceName": data['deviceName'],
        "type": data['type'],
        "status": "offline",
        "lastActiveTime": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
        "farmId": data['farmId'],
        "farmName": farm['name']
    }
    
    devices_data.append(new_device)
    
    return jsonify({
        "id": device_id
    })

@app.route('/api/v1/devices', methods=['PUT'])
def update_device():
    data = request.get_json()
    device_id = data['id']
    
    # 查找设备
    device = next((d for d in devices_data if d['id'] == device_id), None)
    if not device:
        return jsonify({"success": False}), 404
    
    # 更新设备信息
    farm = next((f for f in farms_data if f['id'] == data['farmId']), farms_data[0])
    
    device.update({
        "deviceCode": data['deviceCode'],
        "deviceName": data['deviceName'],
        "type": data['type'],
        "farmId": data['farmId'],
        "farmName": farm['name']
    })
    
    return jsonify({
        "success": True
    })

@app.route('/api/v1/devices/<device_id>', methods=['DELETE'])
def delete_device(device_id):
    global devices_data
    
    # 查找并删除设备
    devices_data = [d for d in devices_data if d['id'] != device_id]
    
    return jsonify({
        "success": True
    })

if __name__ == '__main__':
    print("服务器启动在 http://localhost:5000")
    print("设备管理页面: http://localhost:5000 (需要单独打开 index.html)")
    app.run(debug=True, host='0.0.0.0', port=5000)