from django.contrib import admin
from django.utils.html import format_html
from django.utils.translation import gettext_lazy as _
from unfold.admin import ModelAdmin, TabularInline
from unfold.decorators import display

from apps.support.models import SupportMessage, SupportRoom
from utils.admin import dovoodi_admin_site, project_admin_site


class SupportMessageInline(TabularInline):
    model = SupportMessage
    extra = 1
    fields = ('sender_type', 'sender', 'content', 'is_read', 'created_at')
    readonly_fields = ('created_at',)


class SupportRoomAdmin(ModelAdmin):
    list_display = (
        'id',
        'display_user',
        'display_status',
        'unread_by_admin',
        'unread_by_user',
        'last_message_at',
        'created_at',
    )
    list_filter = ('status', 'created_at', 'last_message_at')
    search_fields = ('user__email', 'user__fullname', 'user__device_id')
    readonly_fields = ('created_at', 'updated_at', 'last_message_at')
    inlines = [SupportMessageInline]
    list_per_page = 25

    @display(description=_('User / Guest'))
    def display_user(self, obj: SupportRoom):
        if obj.user.email:
            return f"{obj.user.fullname or ''} ({obj.user.email})".strip()
        return f"Guest ({str(obj.user.device_id or obj.user_id)[:12]})"

    @display(description=_('Status'))
    def display_status(self, obj: SupportRoom):
        colors = {
            'open': '#3B82F6',
            'pending': '#F59E0B',
            'answered': '#10B981',
            'closed': '#6B7280',
        }
        color = colors.get(obj.status, '#6B7280')
        return format_html(
            '<span style="color: {}; font-weight: 600;">{}</span>',
            color,
            obj.get_status_display(),
        )

    def save_formset(self, request, form, formset, change):
        instances = formset.save(commit=False)
        for instance in instances:
            if isinstance(instance, SupportMessage) and not instance.pk:
                if not instance.sender_id:
                    instance.sender = request.user
                    instance.sender_type = SupportMessage.SenderType.SUPPORT
            instance.save()
        formset.save_m2m()


dovoodi_admin_site.register(SupportRoom, SupportRoomAdmin)
project_admin_site.register(SupportRoom, SupportRoomAdmin)