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

app = Flask(__name__)
CORS(app)

# Mock data generators
def generate_statistics():
    return {
        "totalCount": random.randint(50, 200),
        "participantsCount": random.randint(1000, 5000),
        "favoritesCount": random.randint(100, 800),
        "sharesCount": random.randint(50, 300)
    }

def generate_region_distribution():
    regions = ["北京", "上海", "广州", "深圳", "杭州", "成都"]
    return [
        {
            "region": region,
            "count": random.randint(10, 100)
        }
        for region in regions
    ]

def generate_trend_data(days):
    data = []
    for i in range(days):
        date = (datetime.now() - timedelta(days=days-i-1)).strftime("%Y-%m-%d")
        data.append({
            "date": date,
            "newActivities": random.randint(1, 10),
            "participants": random.randint(50, 200)
        })
    return data

def generate_activity_list(page, size):
    activity_types = ["技术分享会", "产品发布会", "用户交流会", "培训workshop", "行业峰会"]
    locations = ["北京国际会议中心", "上海展览馆", "广州大剧院", "深圳会展中心", "杭州国际博览中心"]
    
    total = random.randint(50, 100)
    start_idx = (page - 1) * size
    
    items = []
    for i in range(min(size, total - start_idx)):
        activity_id = f"act_{start_idx + i + 1}"
        items.append({
            "id": activity_id,
            "name": f"{random.choice(activity_types)} {start_idx + i + 1}",
            "time": (datetime.now() + timedelta(days=random.randint(1, 30))).strftime("%Y-%m-%d %H:%M"),
            "location": random.choice(locations),
            "participants": random.randint(20, 500)
        })
    
    return {
        "total": total,
        "items": items
    }

def generate_activity_detail(activity_id):
    activity_types = ["技术分享会", "产品发布会", "用户交流会", "培训workshop", "行业峰会"]
    locations = ["北京国际会议中心", "上海展览馆", "广州大剧院", "深圳会展中心", "杭州国际博览中心"]
    
    return {
        "id": activity_id,
        "name": f"{random.choice(activity_types)} - 详情",
        "description": "这是一个精彩的活动，将为参与者带来丰富的知识和体验。活动内容包括主题演讲、互动讨论、网络交流等环节。",
        "time": (datetime.now() + timedelta(days=random.randint(1, 30))).strftime("%Y-%m-%d %H:%M"),
        "location": random.choice(locations),
        "participants": random.randint(20, 500),
        "reviews": [
            {"user": "用户A", "comment": "活动很棒！"},
            {"user": "用户B", "comment": "学到了很多东西"}
        ]
    }

@app.route('/api/v1/activities/statistics', methods=['GET'])
def get_statistics():
    # Get query parameters
    date_range = request.args.get('dateRange', '').split(',') if request.args.get('dateRange') else []
    activity_type = request.args.get('activityType')
    region = request.args.get('region')
    
    return jsonify(generate_statistics())

@app.route('/api/v1/activities/region-distribution', methods=['GET'])
def get_region_distribution():
    date_range = request.args.get('dateRange', '').split(',') if request.args.get('dateRange') else []
    activity_type = request.args.get('activityType')
    
    return jsonify(generate_region_distribution())

@app.route('/api/v1/activities/trend', methods=['GET'])
def get_trend():
    days = int(request.args.get('days', 7))
    activity_type = request.args.get('activityType')
    region = request.args.get('region')
    
    return jsonify(generate_trend_data(days))

@app.route('/api/v1/activities/list', methods=['GET'])
def get_activity_list():
    page = int(request.args.get('page', 1))
    size = int(request.args.get('size', 10))
    date_range = request.args.get('dateRange', '').split(',') if request.args.get('dateRange') else []
    activity_type = request.args.get('activityType')
    region = request.args.get('region')
    
    return jsonify(generate_activity_list(page, size))

@app.route('/api/v1/activities/detail/<activity_id>', methods=['GET'])
def get_activity_detail(activity_id):
    return jsonify(generate_activity_detail(activity_id))

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