import json
import urllib.parse

from django import template
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.shortcuts import render, get_object_or_404
from .models import Company

from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from django.shortcuts import render, get_object_or_404
from .models import Company
from django.db.models import Q


def home(request):
    # 这里不再执行任何数据库查询，直接渲染主页模板
    return render(request, 'business_information/home.html')


def about_us(request):
    # 这里不再执行任何数据库查询，直接渲染主页模板
    return render(request, 'business_information/about_us.html')


def company_list(request):
    # 尝试打开并加载JSON文件
    json_file_path = 'static/file/city.json'
    try:
        with open(json_file_path, 'r', encoding='utf-8') as file:
            city_data = json.load(file)
    except FileNotFoundError:
        return render(request, 'business_information/error.html', {'error': 'JSON文件未找到'})

    # 尝试打开并加载JSON文件
    file_path = 'static/file/industry.json'
    with open(file_path, 'r', encoding='utf-8') as file:
        industry_data = json.load(file)
    # 初始化一个新的字典来存储省份和城市信息
    provinces_cities = {
        "直辖市": ['北京市', '天津市', '重庆市', '上海市']
    }

    # 获取省份数据
    province = city_data.get('00')
    for num, name in province.items():
        if name in provinces_cities.get('直辖市'):
            continue
        else:
            provinces_cities[name] = []
            for k, v in city_data[num].items():
                provinces_cities[name].append(v)

    # 返回解析后的省份和城市信息
    return render(request, 'business_information/company_list.html',
                  {'provinces_cities': provinces_cities, 'industry_data': industry_data})


def list_detail(request):
    # 获取查询参数
    query_name = request.GET.get('name', '')
    query_province = request.GET.get('province', '')
    query_city = request.GET.get('city', '')
    query_district = request.GET.get('district', '')
    query_industry = request.GET.get('industry', '')

    # 构建查询条件（Q 对象用于执行复杂查询）
    query_conditions = Q()
    if query_name:
        query_conditions &= Q(name__icontains=query_name)
    if query_province:
        query_conditions &= Q(province__icontains=query_province)
    if query_city:
        query_conditions &= Q(city__icontains=query_city)
    if query_district:
        query_conditions &= Q(district__icontains=query_district)
    if query_industry:
        query_conditions &= Q(industry__icontains=query_industry)

    # 过滤查询集
    companies = Company.objects.filter(query_conditions)
    count = len(companies)

    # 分页
    paginator = Paginator(companies, 10)  # 每页显示10条记录
    page = request.GET.get('page', 1)

    try:
        companies = paginator.page(page)
    except PageNotAnInteger:
        companies = paginator.page(1)
    except EmptyPage:
        companies = paginator.page(paginator.num_pages)

    # 查询条件
    json_file_path = 'static/file/city.json'
    try:
        with open(json_file_path, 'r', encoding='utf-8') as file:
            city_data = json.load(file)
    except FileNotFoundError:
        return render(request, 'business_information/error.html', {'error': 'JSON文件未找到'})

    # 尝试打开并加载JSON文件
    file_path = 'static/file/industry.json'
    with open(file_path, 'r', encoding='utf-8') as file:
        industry_data = json.load(file)
    industries_data = []
    # 处理行业
    for k in industry_data.keys():
        industries_data.append(k)

    # 初始化一个新的字典来存储省份和城市信息
    provinces_cities = []
    # 获取省份数据
    province = city_data.get('00')
    for num, name in province.items():
        provinces_cities.append(name)

    # 处理查询字符串
    get_data = request.GET.copy()
    if 'page' in get_data:
        del get_data['page']
    query_string = urllib.parse.urlencode(get_data)

    # 这里不再执行任何数据库查询，直接渲染主页模板
    return render(request, 'business_information/company_list_detail.html',
                  context={'provinces_cities': provinces_cities, 'industries_data': industries_data,
                           'companies': companies,
                           'query_string': query_string,
                           'query_name': query_name,
                           'query_province': query_province,
                           'query_city': query_city,
                           'query_district': query_district,
                           'query_industry': query_industry,
                           'count': count})


def company_detail(request, enterprise_id):
    company = get_object_or_404(Company, enterprise_id=enterprise_id)
    return render(request, 'business_information/company_detail.html', {'company': company})