"""
Django Admin扩展
提供增强的管理界面功能
"""

import logging
from datetime import datetime, timedelta
from django.contrib import admin
from django.contrib.admin import SimpleListFilter
from django.contrib.admin.utils import model_format_dict
from django.contrib import messages
from django.http import HttpResponseRedirect
from django.urls import path, reverse
from django.utils.html import format_html
from django.utils import timezone
from django.db.models import Count, Q
from django.core.cache import cache

from .models import Website, Article, CrawlTask, SiteConfig
from .tasks import crawl_website, crawl_all_websites, cleanup_old_articles
from .distributed_crawler import distributed_crawler
from .task_executor import task_executor

logger = logging.getLogger(__name__)


class WebsiteStatusFilter(SimpleListFilter):
    """网站状态过滤器"""
    title = '网站状态'
    parameter_name = 'status'

    def lookups(self, request, model_admin):
        return (
            ('enabled', '已启用'),
            ('disabled', '已禁用'),
            ('no_articles', '无文章'),
            ('recent_crawl', '最近爬取'),
        )

    def queryset(self, request, queryset):
        if self.value() == 'enabled':
            return queryset.filter(enabled=True)
        elif self.value() == 'disabled':
            return queryset.filter(enabled=False)
        elif self.value() == 'no_articles':
            return queryset.annotate(article_count=Count('article')).filter(article_count=0)
        elif self.value() == 'recent_crawl':
            week_ago = timezone.now() - timedelta(days=7)
            return queryset.filter(last_crawl__gte=week_ago)
        return queryset


class ArticleDateFilter(SimpleListFilter):
    """文章日期过滤器"""
    title = '发布时间'
    parameter_name = 'date_range'

    def lookups(self, request, model_admin):
        return (
            ('today', '今天'),
            ('week', '本周'),
            ('month', '本月'),
            ('quarter', '本季度'),
        )

    def queryset(self, request, queryset):
        now = timezone.now()
        if self.value() == 'today':
            return queryset.filter(created_at__date=now.date())
        elif self.value() == 'week':
            week_start = now - timedelta(days=now.weekday())
            return queryset.filter(created_at__gte=week_start.replace(hour=0, minute=0, second=0))
        elif self.value() == 'month':
            return queryset.filter(created_at__year=now.year, created_at__month=now.month)
        elif self.value() == 'quarter':
            quarter = (now.month - 1) // 3
            quarter_start_month = quarter * 3 + 1
            return queryset.filter(
                created_at__year=now.year,
                created_at__month__gte=quarter_start_month,
                created_at__month__lt=quarter_start_month + 3
            )
        return queryset


class WebsiteAdmin(admin.ModelAdmin):
    """网站管理"""
    list_display = [
        'name', 'base_url', 'enabled', 'article_count',
        'last_crawl_display', 'status_indicator', 'actions_column'
    ]
    list_filter = [WebsiteStatusFilter, 'enabled']
    search_fields = ['name', 'base_url']
    readonly_fields = ['article_count']
    actions = ['enable_websites', 'disable_websites', 'crawl_selected', 'crawl_all']

    fieldsets = (
        ('基本信息', {
            'fields': ('name', 'base_url', 'enabled')
        }),
        ('统计信息', {
            'fields': ('article_count',),
            'classes': ('collapse',)
        }),
        ('时间信息', {
            'fields': (),
            'classes': ('collapse',)
        }),
    )

    # 添加get_websites方法以支持模板中的网站选择
    def get_websites(self, request):
        """获取所有启用的网站，用于模板中的选择框"""
        return Website.objects.filter(enabled=True)

    def article_count(self, obj):
        """文章数量"""
        return obj.article_set.count()

    article_count.short_description = '文章数量'

    def last_crawl_display(self, obj):
        """最后爬取时间显示"""
        return '未实现'

    last_crawl_display.short_description = '最后爬取'

    def status_indicator(self, obj):
        """状态指示器"""
        if obj.enabled:
            return format_html('<span style="color: green;">●</span> 正常')
        else:
            return format_html('<span style="color: red;">●</span> 禁用')

    status_indicator.short_description = '状态'

    def actions_column(self, obj):
        """操作列"""
        return format_html(
            '<a href="{}" class="button">爬取</a> '
            '<a href="{}" class="button">查看文章</a>',
            reverse('admin:crawl_website', args=[obj.id]),
            reverse('admin:core_article_changelist') + f'?website__id__exact={obj.id}'
        )

    actions_column.short_description = '操作'

    def enable_websites(self, request, queryset):
        """启用选中的网站"""
        updated = queryset.update(enabled=True)
        self.message_user(request, f'成功启用 {updated} 个网站')

    enable_websites.short_description = '启用选中的网站'

    def disable_websites(self, request, queryset):
        """禁用选中的网站"""
        updated = queryset.update(enabled=False)
        self.message_user(request, f'成功禁用 {updated} 个网站')

    disable_websites.short_description = '禁用选中的网站'

    def crawl_selected(self, request, queryset):
        """爬取选中的网站"""
        for website in queryset:
            try:
                task = crawl_website.delay(website.id)
                self.message_user(
                    request,
                    f'网站 {website.name} 爬取任务已启动 (任务ID: {task.id})',
                    messages.SUCCESS
                )
            except Exception as e:
                error_msg = str(e)
                if "[Errno 61] Connection refused" in error_msg:
                    detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
                else:
                    detailed_msg = error_msg
                self.message_user(
                    request,
                    f'网站 {website.name} 爬取任务启动失败: {detailed_msg}',
                    messages.ERROR
                )

    crawl_selected.short_description = '爬取选中的网站'

    def crawl_all(self, request, queryset):
        try:
            task = crawl_all_websites.delay()
            self.message_user(
                request,
                f'批量爬取任务已启动 (任务ID: {task.id})',
                messages.SUCCESS
            )
        except Exception as e:
            error_msg = str(e)
            if "[Errno 61] Connection refused" in error_msg:
                detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
            else:
                detailed_msg = error_msg
            self.message_user(
                request,
                f'批量爬取任务启动失败: {detailed_msg}',
                messages.ERROR
            )

    #    crawl_all.short_description = '爬取所有网站'

    def get_urls(self):
        """添加自定义URL"""
        urls = super().get_urls()
        custom_urls = [
            path(
                '<int:website_id>/crawl/',
                self.admin_site.admin_view(self.crawl_website_view),
                name='crawl_website',
            ),
            path(
                'run-crawler/',
                self.admin_site.admin_view(self.run_crawler_view),
                name='run_crawler',
            ),
        ]
        return custom_urls + urls

    def crawl_website_view(self, request, website_id):
        """爬取单个网站视图"""
        try:
            website = Website.objects.get(id=website_id)
            task = crawl_website.delay(website_id)
            self.message_user(
                request,
                f'网站 {website.name} 爬取任务已启动 (任务ID: {task.id})',
                messages.SUCCESS
            )
        except Website.DoesNotExist:
            self.message_user(request, '网站不存在', messages.ERROR)
        except Exception as e:
            error_msg = str(e)
            if "[Errno 61] Connection refused" in error_msg:
                detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
            else:
                detailed_msg = error_msg
            self.message_user(request, f'爬取任务启动失败: {detailed_msg}', messages.ERROR)

        return HttpResponseRedirect(reverse('admin:core_website_changelist'))

    def run_crawler_view(self, request):
        """运行爬虫视图"""
        try:
            task = crawl_all_websites.delay()
            self.message_user(
                request,
                f'批量爬取任务已启动 (任务ID: {task.id})',
                messages.SUCCESS
            )
        except Exception as e:
            error_msg = str(e)
            if "[Errno 61] Connection refused" in error_msg:
                detailed_msg = "连接被拒绝，可能是Redis或其他依赖服务未启动。请检查以下几点：\n1. Redis服务是否运行 (尝试运行: redis-server)\n2. 如果使用Docker，请确保容器正在运行\n3. 检查Django配置中的CELERY_BROKER_URL设置\n4. 在本地开发环境中，可以运行 'python manage.py runserver' 和 'celery -A myproject worker -l info' 来启动必要的服务"
            else:
                detailed_msg = error_msg
            self.message_user(
                request,
                f'批量爬取任务启动失败: {detailed_msg}',
                messages.ERROR
            )

        return HttpResponseRedirect(reverse('admin:core_website_changelist'))


class ArticleAdmin(admin.ModelAdmin):
    """文章管理"""
    list_display = [
        'title', 'website', 'created_at',
        'media_count', 'actions_column'
    ]
    list_filter = [
        ArticleDateFilter, 'website', 'created_at'
    ]
    search_fields = ['title', 'content', 'url']
    readonly_fields = ['created_at', 'media_files_display']
    date_hierarchy = 'created_at'

    fieldsets = (
        ('基本信息', {
            'fields': ('title', 'url', 'website')
        }),
        ('内容', {
            'fields': ('content',)
        }),
        ('媒体文件', {
            'fields': ('media_files_display',),
            'classes': ('collapse',)
        }),
        ('时间信息', {
            'fields': ('created_at',),
            'classes': ('collapse',)
        }),
    )

    # 添加导出选中文章的操作
    actions = ['export_selected_articles']

    def export_selected_articles(self, request, queryset):
        """
        导出选中的文章为ZIP文件
        """
        import zipfile
        from django.http import HttpResponse
        from io import BytesIO
        from django.conf import settings
        import os
        from bs4 import BeautifulSoup
        from docx import Document
        
        # 创建内存中的ZIP文件
        zip_buffer = BytesIO()
        
        with zipfile.ZipFile(zip_buffer, 'w') as zip_file:
            # 为每篇文章创建文件夹并添加内容
            for article in queryset:
                # 创建文章文件夹名称
                article_folder = f"article_{article.id}_{article.title.replace('/', '_').replace('\\', '_').replace(':', '_').replace('*', '_').replace('?', '_').replace('"', '_').replace('<', '_').replace('>', '_').replace('|', '_')}"
                
                # 创建Word文档
                doc = Document()
                doc.add_heading(article.title, 0)
                
                # 添加文章信息
                doc.add_paragraph(f"网站: {article.website.name if article.website else ''}")
                doc.add_paragraph(f"URL: {article.url}")
                doc.add_paragraph(f"发布时间: {article.pub_date.strftime('%Y-%m-%d %H:%M:%S') if article.pub_date else ''}")
                doc.add_paragraph(f"创建时间: {article.created_at.strftime('%Y-%m-%d %H:%M:%S') if article.created_at else ''}")
                
                # 添加内容标题
                doc.add_heading('内容:', level=1)
                
                # 处理HTML内容
                soup = BeautifulSoup(article.content, 'html.parser')
                content_text = soup.get_text()
                doc.add_paragraph(content_text)
                
                # 将Word文档保存到内存中
                doc_buffer = BytesIO()
                doc.save(doc_buffer)
                doc_buffer.seek(0)
                
                # 将Word文档添加到ZIP文件
                zip_file.writestr(os.path.join(article_folder, f'{article.title.replace("/", "_")}.docx'), doc_buffer.getvalue())
                
                # 添加媒体文件到ZIP包
                if article.media_files:
                    for media_file in article.media_files:
                        try:
                            full_path = os.path.join(settings.MEDIA_ROOT, media_file)
                            if os.path.exists(full_path):
                                # 添加文件到ZIP包
                                zip_file.write(full_path, os.path.join(article_folder, 'media', os.path.basename(media_file)))
                        except Exception as e:
                            # 如果添加媒体文件失败，继续处理其他文件
                            pass
        
        # 创建HttpResponse
        zip_buffer.seek(0)
        response = HttpResponse(zip_buffer.getvalue(), content_type='application/zip')
        response['Content-Disposition'] = 'attachment; filename=selected_articles.zip'
        
        return response

    export_selected_articles.short_description = "导出所选的文章为ZIP"

    def content_preview(self, obj):
        """内容预览"""
        return obj.content[:100] + '...' if len(obj.content) > 100 else obj.content

    content_preview.short_description = '内容预览'

    def media_count(self, obj):
        """媒体文件数量"""
        if obj.media_files:
            return len(obj.media_files)
        return 0

    media_count.short_description = '媒体文件'

    def media_files_display(self, obj):
        """媒体文件显示"""
        if not obj.media_files:
            return '无媒体文件'

        html = '<div style="max-height: 300px; overflow-y: auto;">'
        for i, media in enumerate(obj.media_files):
            if media.get('type') == 'image':
                html += f'<div style="margin: 10px 0;"><img src="{media["url"]}" style="max-width: 200px; max-height: 150px;" /></div>'
            elif media.get('type') == 'video':
                html += f'<div style="margin: 10px 0;"><video controls style="max-width: 200px;"><source src="{media["url"]}" type="video/mp4"></video></div>'
        html += '</div>'
        return format_html(html)

    media_files_display.short_description = '媒体文件'

    def actions_column(self, obj):
        """操作列"""
        # 修改: 添加跳转到本地文章详情页的链接
        return format_html(
            '<a href="{}" target="_blank" class="button">查看原文</a> '
            '<a href="{}" target="_blank" class="button">本地查看</a>',
            obj.url,
            reverse('article_detail', args=[obj.id])
        )

    actions_column.short_description = '操作'


class CrawlTaskStatusFilter(SimpleListFilter):
    """爬取任务状态过滤器"""
    title = '任务状态'
    parameter_name = 'status'

    def lookups(self, request, model_admin):
        return (
            ('pending', '等待中'),
            ('running', '运行中'),
            ('completed', '已完成'),
            ('failed', '失败'),
            ('cancelled', '已取消'),
        )

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(status=self.value())
        return queryset


class CrawlTaskTypeFilter(SimpleListFilter):
    """爬取任务类型过滤器"""
    title = '任务类型'
    parameter_name = 'task_type'

    def lookups(self, request, model_admin):
        return (
            ('keyword', '关键词搜索'),
            ('historical', '历史文章'),
            ('full_site', '全站爬取'),
        )

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(task_type=self.value())
        return queryset


class CrawlTaskAdmin(admin.ModelAdmin):
    """爬取任务管理"""
    list_display = [
        'name', 'task_type', 'keyword', 'websites_display', 'status', 
        'progress_display', 'created_at', 'duration_display', 'actions_column'
    ]
    list_filter = [CrawlTaskStatusFilter, CrawlTaskTypeFilter, 'created_at']
    search_fields = ['name', 'keyword', 'created_by']
    readonly_fields = [
        'status', 'progress', 'current_website', 'current_action',
        'total_articles', 'success_count', 'failed_count',
        'created_at', 'started_at', 'completed_at', 'error_message',
        'result_details', 'duration_display', 'progress_display',
        'execution_count', 'last_execution_at', 'execution_summary'
    ]
    actions = ['start_tasks', 'rerun_tasks', 'cancel_tasks', 'delete_completed_tasks']
    
    class Media:
        js = ('admin/js/crawl_task_actions.js',)
    
    fieldsets = (
        ('基本信息', {
            'fields': ('name', 'task_type', 'keyword')
        }),
        ('爬取配置', {
            'fields': ('websites', 'start_date', 'end_date', 'max_pages', 'max_articles')
        }),
        ('任务状态', {
            'fields': ('status', 'progress_display', 'current_website', 'current_action'),
            'classes': ('collapse',)
        }),
        ('统计信息', {
            'fields': ('total_articles', 'success_count', 'failed_count'),
            'classes': ('collapse',)
        }),
        ('时间信息', {
            'fields': ('created_at', 'started_at', 'completed_at', 'duration_display'),
            'classes': ('collapse',)
        }),
        ('执行历史', {
            'fields': ('execution_count', 'last_execution_at', 'execution_summary'),
            'classes': ('collapse',)
        }),
        ('错误信息', {
            'fields': ('error_message',),
            'classes': ('collapse',)
        }),
        ('结果详情', {
            'fields': ('result_details',),
            'classes': ('collapse',)
        }),
    )
    
    def websites_display(self, obj):
        """网站列表显示"""
        return obj.get_websites_display()
    websites_display.short_description = '目标网站'
    
    def progress_display(self, obj):
        """进度显示"""
        if obj.status == 'running':
            return format_html(
                '<div style="width: 100px; background-color: #f0f0f0; border-radius: 3px;">'
                '<div style="width: {}%; background-color: #4CAF50; height: 20px; border-radius: 3px; text-align: center; color: white; line-height: 20px;">{}%</div>'
                '</div>',
                obj.progress, obj.progress
            )
        elif obj.status == 'completed':
            return format_html('<span style="color: green;">✓ 完成</span>')
        elif obj.status == 'failed':
            return format_html('<span style="color: red;">✗ 失败</span>')
        elif obj.status == 'cancelled':
            return format_html('<span style="color: orange;">⊘ 已取消</span>')
        else:
            return format_html('<span style="color: gray;">⏳ 等待</span>')
    progress_display.short_description = '进度'
    
    def duration_display(self, obj):
        """执行时长显示"""
        duration = obj.get_duration()
        if duration:
            total_seconds = int(duration.total_seconds())
            hours = total_seconds // 3600
            minutes = (total_seconds % 3600) // 60
            seconds = total_seconds % 60
            if hours > 0:
                return f"{hours}小时{minutes}分钟"
            elif minutes > 0:
                return f"{minutes}分钟{seconds}秒"
            else:
                return f"{seconds}秒"
        return "-"
    duration_display.short_description = '执行时长'
    
    def execution_summary(self, obj):
        """执行摘要显示"""
        return obj.get_execution_summary()
    execution_summary.short_description = '执行摘要'
    
    def actions_column(self, obj):
        """操作列"""
        actions = []
        
        if obj.status == 'pending':
            actions.append(f'<a href="javascript:void(0)" onclick="startTask({obj.id})" class="button">开始</a>')
        
        if obj.can_cancel():
            actions.append(f'<a href="javascript:void(0)" onclick="cancelTask({obj.id})" class="button">取消</a>')
        
        if obj.status == 'completed':
            actions.append(f'<a href="javascript:void(0)" onclick="viewResults({obj.id})" class="button">查看结果</a>')
            actions.append(f'<a href="javascript:void(0)" onclick="rerunTask({obj.id})" class="button" style="background-color: #28a745;">重新执行</a>')
        
        if obj.status in ['failed', 'cancelled']:
            actions.append(f'<a href="javascript:void(0)" onclick="rerunTask({obj.id})" class="button" style="background-color: #28a745;">重新执行</a>')
        
        return format_html(' '.join(actions))
    actions_column.short_description = '操作'
    
    def start_tasks(self, request, queryset):
        """启动选中的任务"""
        started_count = 0
        for task in queryset.filter(status='pending'):
            try:
                success, message = task_executor.start_task(task.id)
                if success:
                    started_count += 1
                else:
                    self.message_user(request, f'启动任务 {task.name} 失败: {message}', messages.ERROR)
            except Exception as e:
                self.message_user(request, f'启动任务 {task.name} 失败: {e}', messages.ERROR)
        
        if started_count > 0:
            self.message_user(request, f'成功启动 {started_count} 个任务', messages.SUCCESS)
    start_tasks.short_description = '启动选中的任务'
    
    def rerun_tasks(self, request, queryset):
        """重新执行选中的任务"""
        rerun_count = 0
        for task in queryset.filter(status__in=['completed', 'failed', 'cancelled']):
            try:
                success, message = task_executor.rerun_task(task.id)
                if success:
                    rerun_count += 1
                else:
                    self.message_user(request, f'重新执行任务 {task.name} 失败: {message}', messages.ERROR)
            except Exception as e:
                self.message_user(request, f'重新执行任务 {task.name} 失败: {e}', messages.ERROR)
        
        if rerun_count > 0:
            self.message_user(request, f'成功重新执行 {rerun_count} 个任务', messages.SUCCESS)
    rerun_tasks.short_description = '重新执行选中的任务'
    
    def cancel_tasks(self, request, queryset):
        """取消选中的任务"""
        cancelled_count = 0
        for task in queryset.filter(status__in=['pending', 'running']):
            try:
                success, message = task_executor.cancel_task(task.id)
                if success:
                    cancelled_count += 1
                else:
                    self.message_user(request, f'取消任务 {task.name} 失败: {message}', messages.ERROR)
            except Exception as e:
                self.message_user(request, f'取消任务 {task.name} 失败: {e}', messages.ERROR)
        
        if cancelled_count > 0:
            self.message_user(request, f'成功取消 {cancelled_count} 个任务', messages.SUCCESS)
        elif queryset.filter(status__in=['pending', 'running']).count() > 0:
            # 有任务但没有成功取消任何任务
            self.message_user(request, '没有成功取消任何任务', messages.WARNING)
    cancel_tasks.short_description = '取消选中的任务'
    
    def delete_completed_tasks(self, request, queryset):
        """删除已完成的任务"""
        completed_tasks = queryset.filter(status__in=['completed', 'failed', 'cancelled'])
        count = completed_tasks.count()
        completed_tasks.delete()
        
        if count > 0:
            self.message_user(request, f'成功删除 {count} 个已完成的任务', messages.SUCCESS)
    delete_completed_tasks.short_description = '删除已完成的任务'
    
    def get_urls(self):
        """添加自定义URL"""
        urls = super().get_urls()
        custom_urls = [
            path(
                'create-keyword-task/',
                self.admin_site.admin_view(self.create_keyword_task_view),
                name='create_keyword_task',
            ),
            path(
                'create-historical-task/',
                self.admin_site.admin_view(self.create_historical_task_view),
                name='create_historical_task',
            ),
            path(
                'create-full-site-task/',
                self.admin_site.admin_view(self.create_full_site_task_view),
                name='create_full_site_task',
            ),
            path(
                '<int:task_id>/start/',
                self.admin_site.admin_view(self.start_task_view),
                name='start_task',
            ),
            path(
                '<int:task_id>/cancel/',
                self.admin_site.admin_view(self.cancel_task_view),
                name='cancel_task',
            ),
            path(
                '<int:task_id>/rerun/',
                self.admin_site.admin_view(self.rerun_task_view),
                name='rerun_task',
            ),
            path(
                '<int:task_id>/results/',
                self.admin_site.admin_view(self.view_results_view),
                name='view_results',
            ),
        ]
        return custom_urls + urls
    
    def create_keyword_task_view(self, request):
        """创建关键词搜索任务视图"""
        if request.method == 'POST':
            try:
                from .utils import WEBSITE_CRAWL_CONFIGS
                
                name = request.POST.get('name', '')
                keyword = request.POST.get('keyword', '')
                websites = request.POST.getlist('websites')
                start_date = request.POST.get('start_date')
                end_date = request.POST.get('end_date')
                max_pages = int(request.POST.get('max_pages', 10))
                max_articles = int(request.POST.get('max_articles', 100))
                
                if not name or not keyword:
                    self.message_user(request, '任务名称和关键词不能为空', messages.ERROR)
                    return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
                
                # 创建任务
                task = CrawlTask.objects.create(
                    name=name,
                    task_type='keyword',
                    keyword=keyword,
                    start_date=start_date if start_date else None,
                    end_date=end_date if end_date else None,
                    max_pages=max_pages,
                    max_articles=max_articles,
                    created_by=request.user.username if request.user.is_authenticated else 'admin'
                )
                
                # 添加选择的网站
                if websites:
                    website_objects = Website.objects.filter(name__in=websites)
                    task.websites.set(website_objects)
                
                self.message_user(request, f'关键词搜索任务 "{name}" 创建成功', messages.SUCCESS)
                return HttpResponseRedirect(reverse('admin:core_crawltask_change', args=[task.id]))
                
            except Exception as e:
                self.message_user(request, f'创建任务失败: {e}', messages.ERROR)
        
        # GET请求，显示创建表单
        context = {
            'websites': Website.objects.filter(enabled=True),
            'title': '创建关键词搜索任务'
        }
        return admin.site.admin_view(self.render_create_task_template)(request, 'admin/create_keyword_task.html', context)
    
    def create_historical_task_view(self, request):
        """创建历史文章任务视图"""
        if request.method == 'POST':
            try:
                from .utils import WEBSITE_CRAWL_CONFIGS
                
                name = request.POST.get('name', '')
                websites = request.POST.getlist('websites')
                start_date = request.POST.get('start_date')
                end_date = request.POST.get('end_date')
                max_articles = int(request.POST.get('max_articles', 50))
                
                if not name:
                    self.message_user(request, '任务名称不能为空', messages.ERROR)
                    return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
                
                # 创建任务
                task = CrawlTask.objects.create(
                    name=name,
                    task_type='historical',
                    keyword='历史文章',
                    start_date=start_date if start_date else None,
                    end_date=end_date if end_date else None,
                    max_articles=max_articles,
                    created_by=request.user.username if request.user.is_authenticated else 'admin'
                )
                
                # 添加选择的网站
                if websites:
                    website_objects = Website.objects.filter(name__in=websites)
                    task.websites.set(website_objects)
                
                self.message_user(request, f'历史文章任务 "{name}" 创建成功', messages.SUCCESS)
                return HttpResponseRedirect(reverse('admin:core_crawltask_change', args=[task.id]))
                
            except Exception as e:
                self.message_user(request, f'创建任务失败: {e}', messages.ERROR)
        
        # GET请求，显示创建表单
        context = {
            'websites': Website.objects.filter(enabled=True),
            'title': '创建历史文章任务'
        }
        return admin.site.admin_view(self.render_create_task_template)(request, 'admin/create_historical_task.html', context)
    
    def create_full_site_task_view(self, request):
        """创建全站爬取任务视图"""
        if request.method == 'POST':
            try:
                from .utils import WEBSITE_CRAWL_CONFIGS
                
                name = request.POST.get('name', '')
                websites = request.POST.getlist('websites')
                max_pages = int(request.POST.get('max_pages', 500))
                
                if not name:
                    self.message_user(request, '任务名称不能为空', messages.ERROR)
                    return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
                
                # 创建任务
                task = CrawlTask.objects.create(
                    name=name,
                    task_type='full_site',
                    keyword='全站爬取',
                    max_pages=max_pages,
                    created_by=request.user.username if request.user.is_authenticated else 'admin'
                )
                
                # 添加选择的网站
                if websites:
                    website_objects = Website.objects.filter(name__in=websites)
                    task.websites.set(website_objects)
                
                self.message_user(request, f'全站爬取任务 "{name}" 创建成功', messages.SUCCESS)
                return HttpResponseRedirect(reverse('admin:core_crawltask_change', args=[task.id]))
                
            except Exception as e:
                self.message_user(request, f'创建任务失败: {e}', messages.ERROR)
        
        # GET请求，显示创建表单
        context = {
            'websites': Website.objects.filter(enabled=True),
            'title': '创建全站爬取任务'
        }
        return admin.site.admin_view(self.render_create_task_template)(request, 'admin/create_full_site_task.html', context)
    
    def start_task_view(self, request, task_id):
        """启动任务视图"""
        try:
            success, message = task_executor.start_task(task_id)
            if success:
                self.message_user(request, f'任务已启动: {message}', messages.SUCCESS)
            else:
                self.message_user(request, f'启动任务失败: {message}', messages.ERROR)
        except Exception as e:
            self.message_user(request, f'启动任务失败: {e}', messages.ERROR)
        
        return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
    
    def rerun_task_view(self, request, task_id):
        """重新执行任务视图"""
        try:
            success, message = task_executor.rerun_task(task_id)
            if success:
                self.message_user(request, f'任务已重新执行: {message}', messages.SUCCESS)
            else:
                self.message_user(request, f'重新执行任务失败: {message}', messages.ERROR)
        except Exception as e:
            self.message_user(request, f'重新执行任务失败: {e}', messages.ERROR)
        
        return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
    
    def cancel_task_view(self, request, task_id):
        """取消任务视图"""
        try:
            success, message = task_executor.cancel_task(task_id)
            if success:
                self.message_user(request, f'任务已取消: {message}', messages.SUCCESS)
            else:
                self.message_user(request, f'取消任务失败: {message}', messages.ERROR)
        except Exception as e:
            self.message_user(request, f'取消任务失败: {e}', messages.ERROR)
        
        return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
    
    def view_results_view(self, request, task_id):
        """查看结果视图"""
        try:
            task = CrawlTask.objects.get(id=task_id)
            context = {
                'task': task,
                'title': f'任务结果 - {task.name}'
            }
            return admin.site.admin_view(self.render_create_task_template)(request, 'admin/task_results.html', context)
        except CrawlTask.DoesNotExist:
            self.message_user(request, '任务不存在', messages.ERROR)
            return HttpResponseRedirect(reverse('admin:core_crawltask_changelist'))
    
    def render_create_task_template(self, request, template_name, context):
        """渲染创建任务模板"""
        from django.template.loader import render_to_string
        from django.http import HttpResponse
        
        context.update({
            'site_header': admin.site.site_header,
            'site_title': admin.site.site_title,
            'has_permission': True,
            'user': request.user,
        })
        
        html = render_to_string(template_name, context)
        return HttpResponse(html)


#class CrawlerStatusAdmin(admin.ModelAdmin):
#    """爬虫状态管理"""
#    change_list_template = 'admin/crawler_status.html'
#
#    def changelist_view(self, request, extra_context=None):
#        """爬虫状态视图"""
#        # 获取分布式爬虫状态
#        nodes = distributed_crawler.get_available_nodes()
#        node_statuses = []
#
#        for node_id in nodes:
#            status = distributed_crawler.get_node_status(node_id)
#            node_statuses.append(status)
#
#        # 获取最近的批次
#        batches = distributed_crawler.get_all_batches()[:10]
#
#        # 获取任务统计
#        task_stats = {
#            'active_tasks': len([n for n in node_statuses if n['active_tasks'] > 0]),
#            'total_nodes': len(nodes),
#            'total_batches': len(batches),
#        }
#
#        extra_context = extra_context or {}
#        extra_context.update({
#            'nodes': node_statuses,
#            'batches': batches,
#            'task_stats': task_stats,
#        })
#
#        return super().changelist_view(request, extra_context)
#

class SiteConfigAdmin(admin.ModelAdmin):
    """网站配置管理"""
    list_display = ['site_title', 'show_title', 'header_background_color', 'header_background_size', 'header_background_position', 'header_height', 'created_at', 'updated_at']
    readonly_fields = ['created_at', 'updated_at']
    
    fieldsets = (
        ('基本信息', {
            'fields': ('site_title', 'show_title')
        }),
        ('版头设置', {
            'fields': ('header_background_image', 'header_background_color', 'header_background_size', 'header_background_position', 'header_height'),
            'description': '上传背景图片后，可以调整图片的显示大小、位置和版头高度'
        }),
        ('时间信息', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )
    
    def has_add_permission(self, request):
        """只允许有一个配置实例"""
        return not SiteConfig.objects.exists()
    
    def has_delete_permission(self, request, obj=None):
        """不允许删除配置"""
        return False


# 注册管理类
admin.site.register(SiteConfig, SiteConfigAdmin)
admin.site.register(Website, WebsiteAdmin)
admin.site.register(Article, ArticleAdmin)
admin.site.register(CrawlTask, CrawlTaskAdmin)


# 隐藏Celery Results管理功能
# 禁用django_celery_results应用的自动注册
try:
    from django_celery_results.models import TaskResult, GroupResult
    from django_celery_results.admin import TaskResultAdmin, GroupResultAdmin
    admin.site.unregister(TaskResult)
    admin.site.unregister(GroupResult)
except:
    pass

# 隐藏Celery Beat周期任务管理功能
# 禁用django_celery_beat应用的自动注册
try:
    from django_celery_beat.models import PeriodicTask, ClockedSchedule, CrontabSchedule, SolarSchedule, IntervalSchedule
    admin.site.unregister(PeriodicTask)
    admin.site.unregister(ClockedSchedule)
    admin.site.unregister(CrontabSchedule)
    admin.site.unregister(SolarSchedule)
    admin.site.unregister(IntervalSchedule)
except:
    pass



# 自定义管理站点标题
admin.site.site_header = 'Green Classroom 管理系统'
admin.site.site_title = 'Green Classroom'
admin.site.index_title = '欢迎使用 Green Classroom 管理系统'