from django.contrib import admin
from django.utils.translation import gettext_lazy as _
from django.urls import reverse
from django.utils.html import format_html
from django.db import models
from ajaxdatatable.admin import AjaxDatatable
from unfold.admin import ModelAdmin, StackedInline, TabularInline
from django.contrib.admin import SimpleListFilter
from unfold.widgets import UnfoldAdminSelectWidget
from django.shortcuts import get_object_or_404, redirect, render

from unfold.decorators import display, action
from django import forms
from django.urls import path, reverse_lazy

from utils.admin import project_admin_site
from unfold.sections import TableSection

from apps.article.models import (
    ArticleCategory, 
    ArticleCollection, 
    PinnedArticleCollection, 
    MiddleArticleCollection, 
    Article, 
    ArticleInCollection,
    ArticleContent,
    ContentPart
)


class ArticleInCollectionInline(TabularInline):
    model = ArticleInCollection
    extra = 1
    autocomplete_fields = ('article',)
    fields = ('article', 'order')
    ordering = ('order',)
    verbose_name = _('Article')
    verbose_name_plural = _('Articles')
    tab = True


class ContentPartInline(StackedInline):
    model = ContentPart
    extra = 1
    fields = ('arabic_text', 'translation', 'order')
    ordering = ('order',)
    verbose_name = _('Content Part')
    verbose_name_plural = _('Content Parts')


class ArticleContentInline(StackedInline):
    model = ArticleContent
    extra = 1
    fields = ('title', 'content', 'priority', 'status')
    ordering = ('priority',)
    verbose_name = _('Article Content')
    verbose_name_plural = _('Article Contents')
    tab = True


class ArticleCollectionAdminBase(ModelAdmin):
    list_display = ('get_title', 'get_display_position', 'status', 'order', 'count_articles')
    list_filter = ('status', 'order')
    search_fields = ('title',)
    ordering = ('order',)
    list_filter_submit = True
    warn_unsaved_form = True
    change_form_show_cancel_button = True
    inlines = [ArticleInCollectionInline]
    

    fieldsets = (
        (None, {
            'fields': ('title', 'summary', 'thumbnail', 'status', 'pin_top', 'order')
        }),
    )

    exclude = ('display_position',)

    @display(description=_('Title'))
    def get_title(self, obj):
        return str(obj.title)

    @display(description=_('Display Position'))
    def get_display_position(self, obj):
        if obj.display_position == ArticleCollection.DisplayPosition.PINNED:
            return format_html('<span style="color: #0066cc; font-weight: bold;">📌 Pinned (Top)</span>')
        else:
            return format_html('<span style="color: #666;">📋 Regular (Middle)</span>')

    @display(description=_('Number of Articles'))
    def count_articles(self, obj):
        count = obj.related_articles.count()
        if count > 0:
            url = reverse('admin:article_article_changelist') + f'?collections__id__exact={obj.id}'
            return format_html('<a href="{}">{}</a>', url, count)
        return count


class PinnedArticleCollectionForm(forms.ModelForm):
    class Meta:
        model = PinnedArticleCollection
        exclude = ('slug',)

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['thumbnail'].required = True
        

class PinnedArticleCollectionAdmin(ArticleCollectionAdminBase):
    form = PinnedArticleCollectionForm
    
    def get_queryset(self, request):
        return super().get_queryset(request).filter(display_position=ArticleCollection.DisplayPosition.PINNED)

    def save_model(self, request, obj, form, change):
        obj.display_position = ArticleCollection.DisplayPosition.PINNED
        super().save_model(request, obj, form, change)


    @display(description=_('Title'))
    def get_title(self, obj):
        from django.templatetags.static import static
        thumbnail_path = obj.thumbnail.url if obj.thumbnail else None
        return obj.title
        # Uncomment below to show thumbnail in the title column
        # return [
        #     obj.title,
        #     None,
        #     None,
        #     {
        #     "path": thumbnail_path,
        #     "height": 30,
        #     "width": 50,
        #     "borderless": True,
        #     # "squared": True,
        #     },
        # ]
        

class MiddleArticleCollectionAdmin(ArticleCollectionAdminBase):
    
    fieldsets = (
        (None, {
            'fields': ('title', 'status', 'pin_top', 'order')
        }),
    )

    def get_queryset(self, request):
        return super().get_queryset(request).filter(display_position=ArticleCollection.DisplayPosition.MIDDLE)

    def save_model(self, request, obj, form, change):
        obj.display_position = ArticleCollection.DisplayPosition.MIDDLE
        super().save_model(request, obj, form, change)


class ArticleCategoryAdmin(ModelAdmin):
    list_display = ('display_header', 'slug', 'status', 'order', 'count_articles', 'created_at')
    list_filter = ('status', 'created_at', 'updated_at')
    search_fields = ('title', 'slug')


    @admin.display(description=_('Number of Articles'))
    def count_articles(self, obj):
        count = obj.articles.count()
        if count > 0:
            url = reverse('admin:article_article_changelist') + f'?categories__id__exact={obj.id}'
            return format_html('<a href="{}">{}</a>', url, count)
        return count
    
    def get_form(self, request, obj=None, change=False, **kwargs):
        form = super().get_form(request, obj, change, **kwargs)
        if form.base_fields.get('slug'):
            form.base_fields['slug'].required = False
        return form
        
    @display(description=_("Category"), header=True)
    def display_header(self, obj):
        return obj.title


class ArticleAdmin(ModelAdmin):
    
    # change_form_before_template = 'article/change_form_before_template.html'
    list_display = ('display_header', 'slug', 'status', 'view_count', 'created_at')
    list_filter = ('status', 'created_at', 'updated_at')
    search_fields = ('title', 'slug', 'description', 'content')
    autocomplete_fields = ('categories',)
    save_as = True
    search_help_text = _("Search by title, slug, description or content")
    search_fields_placeholder = _("Search articles")
    # inlines = [ArticleContentInline]
    actions_row = [
        "action_contents",
    ]

    fieldsets = (
        (None, {
            'fields': ('title', 'slug', 'description', 'thumbnail', 'categories')
        }),
        (_('File'), {
            'fields': ('article_file',)
        }),
        (_('Status'), {
            'fields': ('status',)
        }),
        (_('Statistics'), {
            'fields': ('view_count',)
        }),
    )
    
    def get_form(self, request, obj=None, change=False, **kwargs):
        form = super().get_form(request, obj, change, **kwargs)
        if form.base_fields.get('slug'):
            form.base_fields['slug'].required = False
        if form.base_fields.get('thumbnail'):
            form.base_fields['thumbnail'].required = True
        return form
        

    @action(
        description=_("Contents"),
        url_path="actions-row-custom-url",
    )
    def action_contents(self, request, object_id):
        article = get_object_or_404(Article, pk=object_id)
        url = reverse('admin:article_articlecontent_changelist') + f'?article__id__exact={article.id}'
        return redirect(url)

    @display(description=_("Article"), header=True)
    def display_header(self, obj):
        from django.templatetags.static import static
        
        # Get thumbnail image path - use article's thumbnail if available, otherwise use default
        thumbnail_path = obj.thumbnail.url if obj.thumbnail else None
        
        return [
            obj.title,
            None,
            None,
            {
                "path": thumbnail_path,
                "height": 30,
                "width": 50,
                "borderless": True,
                # "squared": True,
            },
        ]


class ArticleContentAdmin(ModelAdmin):
    list_display = ('title', 'article', 'priority', 'status', 'created_at')
    list_filter = ('status', 'priority', 'created_at')
    search_fields = ('title', 'content')
    autocomplete_fields = ('article',)
    inlines = [ContentPartInline]
    
    fieldsets = (
        (None, {
            'fields': ('article', 'title', 'content', 'priority', 'status')
        }),
    )
    
    def get_changeform_initial_data(self, request):
        initial = super().get_changeform_initial_data(request)
        if 'article__id__exact' in request.GET:
            initial['article'] = request.GET.get('article__id__exact')
        return initial

    # @display(description=_("Content Title"), header=True)
    # def display_header(self, obj):
    #     return str(obj.title)


# Register models with admin site
project_admin_site.register(ArticleCategory, ArticleCategoryAdmin)
project_admin_site.register(PinnedArticleCollection, PinnedArticleCollectionAdmin)
project_admin_site.register(MiddleArticleCollection, MiddleArticleCollectionAdmin)
project_admin_site.register(Article, ArticleAdmin)
project_admin_site.register(ArticleContent, ArticleContentAdmin)