from django.contrib import admin
from django import forms
from django.utils.translation import gettext_lazy as _

from unfold.admin import ModelAdmin, StackedInline
from unfold.contrib.filters.admin import (
    ChoicesDropdownFilter,
    MultipleRelatedDropdownFilter,
    RangeDateFilter,
)

from utils.admin import project_admin_site
from apps.course.models import (
    CourseLiveSession,
    LiveSessionRecording,
    LiveSessionUser,
    USER_ROLE_CHOICES,
    RECORDING_TYPE_CHOICES,
)
from django.contrib.auth import get_user_model

User = get_user_model()


# 🔔 CUSTOM FILTER: Only show active, non-guest users in the right sidebar filter
class ActiveUserDropdownFilter(MultipleRelatedDropdownFilter):
    def field_choices(self, field, request, model_admin):
        return field.get_choices(
            include_blank=False,
            limit_choices_to={'is_active': True, 'email__isnull': False}
        )


# --- WIDTH ENFORCEMENT & PLACEHOLDER TEXT FOR DROPDOWNS ---
class MinWidthInlineForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # Target the dropdown fields to ensure they don't collapse
        target_dropdown_fields = ['user', 'role', 'recording_type']
        
        for field_name, field in self.fields.items():
            if field_name in target_dropdown_fields:
                if hasattr(field.widget, 'attrs'):
                    existing_class = field.widget.attrs.get('class', '')
                    field.widget.attrs['class'] = f"{existing_class} min-w-[250px] w-full"
                    
                    existing_style = field.widget.attrs.get('style', '')
                    field.widget.attrs['style'] = f"{existing_style} min-width: 250px; width: 250px;"
                
                # 🔔 Add the custom placeholder text
                if hasattr(field, 'empty_label'):
                    field.empty_label = _("Select a value")


class LiveSessionUserInline(StackedInline):
    model = LiveSessionUser
    form = MinWidthInlineForm
    extra = 1  
    tab = True
    
    fieldsets = (
        (None, {
            'fields': (('user', 'role', 'is_online'),) # Grouped horizontally
        }),
        (_("Timing"), {
            'fields': (('entered_at', 'exited_at'),) # Grouped horizontally
        }),
    )
    
    show_change_link = True
    verbose_name = _("Session User")
    verbose_name_plural = _("Session Users")

    # 🔔 FILTER THE USER DROPDOWN IN THE FORM ITSELF
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "user":
            kwargs["queryset"] = User.objects.filter(is_active=True, email__isnull=False)
        return super().formfield_for_foreignkey(db_field, request, **kwargs)


class LiveSessionRecordingInline(StackedInline):
    model = LiveSessionRecording
    form = MinWidthInlineForm
    extra = 1  
    tab = True
    
    fieldsets = (
        (None, {
            'fields': (('title', 'recording_type', 'is_active'),) # Grouped horizontally
        }),
        (_("Media"), {
            'fields': ('file',)
        }),
    )
    
    show_change_link = True
    verbose_name = _("Session Recording")
    verbose_name_plural = _("Session Recordings")


class CourseLiveSessionAdmin(ModelAdmin):
    list_display = ("subject", "course", "started_at", "ended_at", "created_at")
    list_filter = (
        ("course", MultipleRelatedDropdownFilter),
        ("started_at", RangeDateFilter),
    )
    search_fields = ("subject", "course__title")
    ordering = ("-started_at",)
    autocomplete_fields = ("course",)
    readonly_fields = ("created_at", "updated_at")
    
    # Add the custom tabs here
    inlines = [LiveSessionUserInline, LiveSessionRecordingInline]
    
    fieldsets = (
        (None, {"fields": ("course", "subject", "started_at", "ended_at")}),
        (_("Timestamps"), {"fields": ("created_at", "updated_at")}),
    )


class LiveSessionUserAdmin(ModelAdmin):
    list_display = ("user", "session", "role", "is_online", "entered_at", "exited_at")
    list_filter = (
        ("session", MultipleRelatedDropdownFilter),
        ("user", ActiveUserDropdownFilter),  # 🔔 APPLIED CUSTOM FILTER HERE!
        ("role", ChoicesDropdownFilter),
        ("entered_at", RangeDateFilter),
        ("is_online", admin.BooleanFieldListFilter),
    )
    search_fields = (
        "user__email",
        "user__fullname",
        "session__subject",
    )
    autocomplete_fields = ("user", "session")
    readonly_fields = ("created_at", "updated_at")
    fieldsets = (
        (None, {"fields": ("session", "user", "role")}),
        (_("Session Timing"), {"fields": ("entered_at", "exited_at", "is_online")}),
        (_("Timestamps"), {"fields": ("created_at", "updated_at")}),
    )

    def get_role_choices(self, request):
        return USER_ROLE_CHOICES

    # FILTER THE STANDALONE ADMIN FORM AS WELL JUST IN CASE
    def formfield_for_foreignkey(self, db_field, request, **kwargs):
        if db_field.name == "user":
            kwargs["queryset"] = User.objects.filter(is_active=True, email__isnull=False)
        return super().formfield_for_foreignkey(db_field, request, **kwargs)


class LiveSessionRecordingAdmin(ModelAdmin):
    list_display = ("title", "session", "recording_type", "is_active", "created_at")
    list_filter = (
        ("session", MultipleRelatedDropdownFilter),
        ("recording_type", ChoicesDropdownFilter),
        ("created_at", RangeDateFilter),
        ("is_active", admin.BooleanFieldListFilter),
    )
    search_fields = ("title", "session__subject", "session__course__title")
    autocomplete_fields = ("session",)
    readonly_fields = ("created_at", "updated_at")
    fieldsets = (
        (None, {"fields": ("session", "title", "recording_type")}),
        (_("Files"), {"fields": ("file", "file_time", "thumbnail")}),
        (_("Status"), {"fields": ("is_active",)}),
        (_("Timestamps"), {"fields": ("created_at", "updated_at")}),
    )

    def get_recording_type_choices(self, request):
        return RECORDING_TYPE_CHOICES


project_admin_site.register(CourseLiveSession, CourseLiveSessionAdmin)
project_admin_site.register(LiveSessionUser, LiveSessionUserAdmin)
project_admin_site.register(LiveSessionRecording, LiveSessionRecordingAdmin)