from django.contrib import admin
from django.utils.html import format_html
from .models import Platform, ContentDeliverable, Strategy


@admin.register(Platform)
class PlatformAdmin(admin.ModelAdmin):
    list_display = (
        'name', 'platform_type', 'status', 'primary_content_type', 
        'total_deliverables', 'completion_rate_display', 'created_at'
    )
    list_filter = ('platform_type', 'status', 'created_at')
    search_fields = ('name', 'description', 'primary_content_type')
    readonly_fields = ('created_at', 'updated_at')
    
    fieldsets = (
        ('Basic Information', {
            'fields': ('name', 'platform_type', 'status', 'primary_content_type')
        }),
        ('Details', {
            'fields': ('description', 'target_audience', 'posting_frequency')
        }),
        ('Timestamps', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        })
    )
    
    def completion_rate_display(self, obj):
        rate = obj.completion_rate
        color = 'green' if rate >= 70 else 'orange' if rate >= 40 else 'red'
        return format_html(
            '<span style="color: {};">{:.1f}%</span>',
            color, rate
        )
    completion_rate_display.short_description = 'Completion Rate'
    
    def total_deliverables(self, obj):
        return obj.total_deliverables
    total_deliverables.short_description = 'Total Content'


class ContentDeliverableInline(admin.TabularInline):
    model = ContentDeliverable
    extra = 0
    fields = ('title', 'content_type', 'status', 'completion_percentage', 'target_date')
    readonly_fields = ()


class StrategyInline(admin.TabularInline):
    model = Strategy
    extra = 0
    fields = ('title', 'priority', 'is_active', 'start_date', 'end_date')


@admin.register(ContentDeliverable)
class ContentDeliverableAdmin(admin.ModelAdmin):
    list_display = (
        'title', 'platform', 'content_type', 'status_display', 
        'completion_percentage_display', 'target_date', 'is_overdue_display'
    )
    list_filter = ('status', 'content_type', 'platform', 'target_date', 'created_at')
    search_fields = ('title', 'description', 'tags', 'platform__name')
    readonly_fields = ('created_at', 'updated_at', 'days_until_due')
    date_hierarchy = 'target_date'
    
    fieldsets = (
        ('Basic Information', {
            'fields': ('platform', 'title', 'content_type', 'status')
        }),
        ('Content Details', {
            'fields': ('description', 'completion_percentage', 'tags')
        }),
        ('Dates', {
            'fields': ('target_date', 'actual_date', 'days_until_due')
        }),
        ('Additional Info', {
            'fields': ('url', 'notes')
        }),
        ('Timestamps', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        })
    )
    
    def status_display(self, obj):
        status_colors = {
            'committed': 'blue',
            'drafted': 'orange',
            'published': 'green',
            'cancelled': 'red'
        }
        color = status_colors.get(obj.status, 'black')
        return format_html(
            '<span style="color: {}; font-weight: bold;">{}</span>',
            color, obj.get_status_display()
        )
    status_display.short_description = 'Status'
    
    def completion_percentage_display(self, obj):
        percentage = obj.completion_percentage
        if percentage == 100:
            color = 'green'
        elif percentage >= 50:
            color = 'orange'
        else:
            color = 'red'
        return format_html(
            '<div style="width: 100px; background-color: #f0f0f0; border-radius: 3px; padding: 2px;">' +
            '<div style="width: {}%; background-color: {}; height: 20px; border-radius: 2px; text-align: center; color: white; line-height: 20px; font-size: 12px;">' +
            '{}%</div></div>',
            percentage, color, percentage
        )
    completion_percentage_display.short_description = 'Progress'
    
    def is_overdue_display(self, obj):
        if obj.is_overdue:
            return format_html('<span style="color: red; font-weight: bold;">⚠ OVERDUE</span>')
        elif obj.days_until_due is not None and obj.days_until_due <= 3 and obj.status != 'published':
            return format_html('<span style="color: orange;">⏰ Due Soon</span>')
        return '✓'
    is_overdue_display.short_description = 'Due Status'
    
    actions = ['mark_as_drafted', 'mark_as_published', 'mark_as_committed']
    
    def mark_as_drafted(self, request, queryset):
        updated = queryset.update(status='drafted')
        self.message_user(request, f'{updated} deliverables marked as drafted.')
    mark_as_drafted.short_description = 'Mark selected items as drafted'
    
    def mark_as_published(self, request, queryset):
        updated = queryset.update(status='published', completion_percentage=100)
        self.message_user(request, f'{updated} deliverables marked as published.')
    mark_as_published.short_description = 'Mark selected items as published'
    
    def mark_as_committed(self, request, queryset):
        updated = queryset.update(status='committed')
        self.message_user(request, f'{updated} deliverables marked as committed.')
    mark_as_committed.short_description = 'Mark selected items as committed'


@admin.register(Strategy)
class StrategyAdmin(admin.ModelAdmin):
    list_display = ('title', 'platform', 'priority', 'is_active', 'start_date', 'end_date')
    list_filter = ('platform', 'priority', 'is_active', 'start_date')
    search_fields = ('title', 'objective', 'tactics', 'actions')
    readonly_fields = ('created_at', 'updated_at')
    
    fieldsets = (
        ('Basic Information', {
            'fields': ('platform', 'title', 'priority', 'is_active')
        }),
        ('Strategy Details', {
            'fields': ('objective', 'tactics', 'actions', 'control')
        }),
        ('Timeline', {
            'fields': ('start_date', 'end_date')
        }),
        ('Timestamps', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        })
    )
    
    actions = ['activate_strategies', 'deactivate_strategies']
    
    def activate_strategies(self, request, queryset):
        updated = queryset.update(is_active=True)
        self.message_user(request, f'{updated} strategies activated.')
    activate_strategies.short_description = 'Activate selected strategies'
    
    def deactivate_strategies(self, request, queryset):
        updated = queryset.update(is_active=False)
        self.message_user(request, f'{updated} strategies deactivated.')
    deactivate_strategies.short_description = 'Deactivate selected strategies'


# Customize admin site headers
admin.site.site_header = "Digital Branding Management System"
admin.site.site_title = "Branding Admin"
admin.site.index_title = "Welcome to Digital Branding Management"