"""
产品参数爬取系统 - 后台管理
"""

from flask import Flask, render_template, jsonify, request
from flask_cors import CORS
import json
from datetime import datetime
from pathlib import Path
import asyncio

app = Flask(__name__)
CORS(app)

BASE_DIR = Path(__file__).parent.parent
DATA_DIR = BASE_DIR / 'data'
PRODUCTS_FILE = DATA_DIR / 'products.json'
TASKS_FILE = DATA_DIR / 'tasks.json'


def load_products():
    if PRODUCTS_FILE.exists():
        return json.loads(PRODUCTS_FILE.read_text(encoding='utf-8'))
    return {"products": [], "last_update": None}


def load_tasks():
    if TASKS_FILE.exists():
        return json.loads(TASKS_FILE.read_text(encoding='utf-8'))
    return {"tasks": []}


# ============ 页面路由 ============

@app.route('/')
def index():
    return render_template('index.html')


@app.route('/products')
def products_page():
    return render_template('products.html')


@app.route('/spiders')
def spiders_page():
    return render_template('spiders.html')


@app.route('/tasks')
def tasks_page():
    return render_template('tasks.html')


@app.route('/config')
def config_page():
    return render_template('config.html')


# ============ API代理 ============

@app.route('/api/stats')
def api_stats():
    """获取统计信息"""
    data = load_products()
    tasks = load_tasks().get("tasks", [])
    
    return jsonify({
        "total_products": len(data.get("products", [])),
        "last_update": data.get("last_update"),
        "total_tasks": len(tasks),
        "running_tasks": len([t for t in tasks if t.get("status") == "running"])
    })


@app.route('/api/products')
def api_products():
    """获取产品列表"""
    data = load_products()
    return jsonify(data)


@app.route('/api/spiders')
def api_spiders():
    """获取爬虫列表"""
    tasks = load_tasks().get("tasks", [])
    
    spiders = [
        {
            "name": "byd",
            "display_name": "比亚迪汽车",
            "description": "爬取比亚迪官网车型参数",
            "url": "https://www.byd.com/cn/",
            "status": "available"
        }
    ]
    
    # 更新最后运行时间
    for spider in spiders:
        for task in reversed(tasks):
            if task.get("spider") == spider["name"]:
                spider["last_run"] = task.get("end_time")
                spider["last_status"] = task.get("status")
                break
    
    return jsonify(spiders)


@app.route('/api/tasks')
def api_tasks():
    """获取任务列表"""
    tasks = load_tasks().get("tasks", [])
    tasks.sort(key=lambda x: x.get("start_time", ""), reverse=True)
    return jsonify(tasks[:50])


@app.route('/api/run/<spider_name>', methods=['POST'])
def api_run_spider(spider_name):
    """运行爬虫"""
    import sys
    sys.path.insert(0, str(BASE_DIR))
    
    data = load_products()
    
    async def run_spider():
        try:
            if spider_name == "byd":
                from spiders.byd import BYDSpider
                
                spider = BYDSpider({"headless": True})
                results = await spider.run()
                
                for item in results:
                    existing = False
                    for i, p in enumerate(data["products"]):
                        if p.get("name") == item.get("name"):
                            data["products"][i].update(item)
                            data["products"][i]["updated_at"] = datetime.now().isoformat()
                            existing = True
                            break
                    
                    if not existing:
                        item["id"] = f"byd-{datetime.now().strftime('%Y%m%d%H%M%S')}-{len(data['products'])}"
                        item["brand"] = "比亚迪"
                        item["source"] = "byd.com"
                        item["created_at"] = datetime.now().isoformat()
                        data["products"].append(item)
                
                PRODUCTS_FILE.write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding='utf-8')
                return {"success": True, "count": len(results)}
            
            return {"success": False, "error": f"Unknown spider: {spider_name}"}
        
        except Exception as e:
            return {"success": False, "error": str(e)}
    
    # 记录任务
    tasks = load_tasks()
    task = {
        "id": f"task-{datetime.now().strftime('%Y%m%d%H%M%S')}",
        "spider": spider_name,
        "status": "running",
        "start_time": datetime.now().isoformat()
    }
    tasks["tasks"].append(task)
    TASKS_FILE.write_text(json.dumps(tasks, ensure_ascii=False, indent=2), encoding='utf-8')
    
    result = asyncio.run(run_spider())
    
    task["status"] = "completed" if result.get("success") else "failed"
    task["end_time"] = datetime.now().isoformat()
    task["result"] = result
    TASKS_FILE.write_text(json.dumps(tasks, ensure_ascii=False, indent=2), encoding='utf-8')
    
    return jsonify(result)


if __name__ == '__main__':
    print("=" * 50)
    print("产品参数爬取系统 - 后台管理")
    print("=" * 50)
    print(f"访问地址: http://localhost:19012")
    print("=" * 50)
    
    app.run(host='0.0.0.0', port=19012, debug=True)