"""
Django Admin Configuration for PawCare

All sensitive mutations via admin are auto-captured by AuditLogMiddleware.
Caregivers are managed exclusively through this panel.
"""

from django.contrib import admin
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.utils.html import format_html

from api.models import (
    User, Service, Caregiver, CaregiverService,
    Pet, Booking, Conversation, Message,
)
from audit.models import AuditLog


# ─────────────────────────────────────────────────────────────────────────────
# User Admin
# ─────────────────────────────────────────────────────────────────────────────
@admin.register(User)
class UserAdmin(BaseUserAdmin):
    list_display = ['email', 'full_name', 'role', 'is_active', 'date_joined']
    list_filter = ['role', 'is_active', 'is_staff']
    search_fields = ['email', 'first_name', 'last_name']
    ordering = ['-date_joined']
    readonly_fields = ['id', 'date_joined', 'last_login']

    fieldsets = (
        ('Account', {'fields': ('id', 'email', 'password')}),
        ('Personal Info', {'fields': ('first_name', 'last_name', 'avatar_url')}),
        ('Encrypted PII', {'fields': ('phone', 'address'), 'classes': ('collapse',)}),
        ('Role & Permissions', {'fields': ('role', 'is_active', 'is_staff', 'is_superuser', 'groups', 'user_permissions')}),
        ('Timestamps', {'fields': ('date_joined', 'last_login')}),
    )
    add_fieldsets = (
        (None, {
            'classes': ('wide',),
            'fields': ('email', 'first_name', 'last_name', 'role', 'password1', 'password2'),
        }),
    )


# ─────────────────────────────────────────────────────────────────────────────
# Service Admin
# ─────────────────────────────────────────────────────────────────────────────
@admin.register(Service)
class ServiceAdmin(admin.ModelAdmin):
    list_display = ['name', 'icon', 'base_price', 'duration_minutes', 'is_active']
    list_editable = ['is_active', 'base_price']
    search_fields = ['name']


# ─────────────────────────────────────────────────────────────────────────────
# Caregiver Admin — primary management interface
# ─────────────────────────────────────────────────────────────────────────────
class CaregiverServiceInline(admin.TabularInline):
    model = CaregiverService
    extra = 1
    fields = ['service', 'price_per_hour', 'is_active']


@admin.register(Caregiver)
class CaregiverAdmin(admin.ModelAdmin):
    list_display = [
        'user', 'city', 'rating_badge', 'total_bookings',
        'is_available', 'is_verified', 'is_featured', 'created_at',
    ]
    list_filter = ['is_available', 'is_verified', 'is_featured', 'background_check_passed', 'city']
    search_fields = ['user__email', 'user__first_name', 'user__last_name', 'city']
    readonly_fields = ['id', 'rating', 'total_reviews', 'total_bookings', 'created_at', 'updated_at', 'profile_image_preview']
    inlines = [CaregiverServiceInline]
    list_per_page = 25
    actions = ['mark_verified', 'mark_featured', 'mark_unavailable']

    fieldsets = (
        ('Identity', {'fields': ('id', 'user', 'profile_image_preview', 'profile_image_url')}),
        ('Profile', {'fields': ('bio', 'years_of_experience', 'specializations', 'certifications', 'languages')}),
        ('Location', {'fields': ('city', 'country', 'latitude', 'longitude')}),
        ('Media', {'fields': ('gallery_images',), 'classes': ('collapse',)}),
        ('Stats', {'fields': ('rating', 'total_reviews', 'total_bookings')}),
        ('Status', {'fields': ('is_available', 'is_verified', 'is_featured', 'background_check_passed')}),
        ('Sensitive', {'fields': ('emergency_contact',), 'classes': ('collapse',)}),
        ('Timestamps', {'fields': ('created_at', 'updated_at')}),
    )

    @admin.display(description='Rating')
    def rating_badge(self, obj):
        color = '#22c55e' if obj.rating >= 4 else '#f59e0b' if obj.rating >= 3 else '#ef4444'
        return format_html(
            '<span style="color:{};font-weight:bold">★ {}</span>', color, obj.rating
        )

    @admin.display(description='Profile Image')
    def profile_image_preview(self, obj):
        if obj.profile_image_url:
            return format_html(
                '<img src="{}" style="height:80px;border-radius:8px;"/>', obj.profile_image_url
            )
        return '—'

    @admin.action(description='✅ Mark selected as Verified')
    def mark_verified(self, request, queryset):
        queryset.update(is_verified=True, background_check_passed=True)

    @admin.action(description='⭐ Toggle Featured')
    def mark_featured(self, request, queryset):
        for c in queryset:
            c.is_featured = not c.is_featured
            c.save(update_fields=['is_featured'])

    @admin.action(description='🔴 Mark as Unavailable')
    def mark_unavailable(self, request, queryset):
        queryset.update(is_available=False)


# ─────────────────────────────────────────────────────────────────────────────
# Pet Admin
# ─────────────────────────────────────────────────────────────────────────────
@admin.register(Pet)
class PetAdmin(admin.ModelAdmin):
    list_display = ['name', 'pet_type', 'owner', 'is_vaccinated', 'is_neutered']
    list_filter = ['pet_type', 'is_vaccinated', 'is_neutered']
    search_fields = ['name', 'owner__email', 'breed']
    readonly_fields = ['id', 'created_at', 'updated_at']


# ─────────────────────────────────────────────────────────────────────────────
# Booking Admin
# ─────────────────────────────────────────────────────────────────────────────
@admin.register(Booking)
class BookingAdmin(admin.ModelAdmin):
    list_display = [
        'short_id', 'user', 'caregiver', 'service', 'status',
        'scheduled_start', 'price_total', 'rating',
    ]
    list_filter = ['status', 'service', 'payment_status']
    search_fields = ['user__email', 'caregiver__user__email']
    readonly_fields = ['id', 'price_subtotal', 'price_fees', 'price_total', 'created_at', 'updated_at']
    date_hierarchy = 'scheduled_start'

    @admin.display(description='ID')
    def short_id(self, obj):
        return str(obj.id)[:8] + '…'


# ─────────────────────────────────────────────────────────────────────────────
# Messaging Admin
# ─────────────────────────────────────────────────────────────────────────────
class MessageInline(admin.TabularInline):
    model = Message
    extra = 0
    readonly_fields = ['sender', 'created_at', 'is_read']
    fields = ['sender', 'message_type', 'content', 'is_read', 'created_at']


@admin.register(Conversation)
class ConversationAdmin(admin.ModelAdmin):
    list_display = ['id', 'booking', 'created_at', 'updated_at']
    readonly_fields = ['id', 'created_at', 'updated_at']
    inlines = [MessageInline]


# ─────────────────────────────────────────────────────────────────────────────
# Audit Log Admin — read-only
# ─────────────────────────────────────────────────────────────────────────────
@admin.register(AuditLog)
class AuditLogAdmin(admin.ModelAdmin):
    list_display = ['timestamp', 'actor_email', 'actor_role', 'action', 'resource_type', 'ip_address', 'response_status']
    list_filter = ['action', 'actor_role', 'response_status']
    search_fields = ['actor_email', 'resource_id', 'request_path', 'description']
    readonly_fields = [f.name for f in AuditLog._meta.fields]
    date_hierarchy = 'timestamp'

    def has_add_permission(self, request):
        return False

    def has_change_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return False