"""
Admin interface for auth models
"""
from django import forms
from django.contrib import admin
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from unfold.admin import ModelAdmin, TabularInline
from simple_history.admin import SimpleHistoryAdmin
from igny8_core.admin.base import AccountAdminMixin, Igny8ModelAdmin
from .models import User, Account, Plan, Subscription, Site, Sector, SiteUserAccess, Industry, IndustrySector, SeedKeyword, PasswordResetToken
from import_export.admin import ExportMixin
from import_export import resources


class AccountAdminForm(forms.ModelForm):
    """Custom form for Account admin with dynamic payment method choices from PaymentMethodConfig"""
    
    class Meta:
        model = Account
        fields = '__all__'
    
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        
        from igny8_core.business.billing.models import PaymentMethodConfig, AccountPaymentMethod
        
        if self.instance and self.instance.pk:
            # Get country from billing_country, fallback to wildcard '*' for global
            country = self.instance.billing_country or '*'
            
            # Get enabled payment methods for this country OR global (*)
            available_methods = PaymentMethodConfig.objects.filter(
                country_code__in=[country, '*'],
                is_enabled=True
            ).order_by('country_code', 'sort_order').values_list('payment_method', 'display_name')
            
            if available_methods:
                # Build choices from PaymentMethodConfig
                choices = []
                seen = set()
                for method_type, display_name in available_methods:
                    if method_type not in seen:
                        choices.append((method_type, display_name or method_type.replace('_', ' ').title()))
                        seen.add(method_type)
            else:
                # Fallback to model choices if no configs
                choices = Account.PAYMENT_METHOD_CHOICES
            
            self.fields['payment_method'].widget = forms.Select(choices=choices)
            
            # Get current default from AccountPaymentMethod
            default_method = AccountPaymentMethod.objects.filter(
                account=self.instance,
                is_default=True,
                is_enabled=True
            ).first()
            
            if default_method:
                self.fields['payment_method'].initial = default_method.type
                self.fields['payment_method'].help_text = f'✓ Current: {default_method.display_name} ({default_method.get_type_display()})'
            else:
                self.fields['payment_method'].help_text = 'Select from available payment methods based on country'
    
    def save(self, commit=True):
        """When payment_method changes, update/create AccountPaymentMethod"""
        from igny8_core.business.billing.models import AccountPaymentMethod, PaymentMethodConfig
        
        instance = super().save(commit=False)
        
        if commit:
            instance.save()
            
            # Get selected payment method
            selected_type = self.cleaned_data.get('payment_method')
            
            if selected_type:
                # Get config for display name and instructions
                country = instance.billing_country or '*'
                config = PaymentMethodConfig.objects.filter(
                    country_code__in=[country, '*'],
                    payment_method=selected_type,
                    is_enabled=True
                ).first()
                
                # Create or update AccountPaymentMethod
                account_method, created = AccountPaymentMethod.objects.get_or_create(
                    account=instance,
                    type=selected_type,
                    defaults={
                        'display_name': config.display_name if config else selected_type.replace('_', ' ').title(),
                        'is_default': True,
                        'is_enabled': True,
                        'instructions': config.instructions if config else '',
                        'country_code': instance.billing_country or '',
                    }
                )
                
                if not created:
                    # Update existing and set as default
                    account_method.is_default = True
                    account_method.is_enabled = True
                    if config:
                        account_method.display_name = config.display_name
                        account_method.instructions = config.instructions
                    account_method.save()
                
                # Unset other methods as default
                AccountPaymentMethod.objects.filter(
                    account=instance
                ).exclude(id=account_method.id).update(is_default=False)
        
        return instance


@admin.register(Plan)
class PlanAdmin(Igny8ModelAdmin):
    """Plan admin - Global, no account filtering needed"""
    list_display = ['name', 'slug', 'price', 'billing_cycle', 'max_sites', 'max_users', 'max_keywords', 'max_content_words', 'included_credits', 'is_active', 'is_featured']
    list_filter = ['is_active', 'billing_cycle', 'is_internal', 'is_featured']
    search_fields = ['name', 'slug']
    readonly_fields = ['created_at']
    
    fieldsets = (
        ('Plan Info', {
            'fields': ('name', 'slug', 'price', 'original_price', 'annual_discount_percent', 'billing_cycle', 'features', 'is_active', 'is_featured', 'is_internal'),
            'description': 'Price: Current price | Original Price: Crossed-out price (optional) | Annual Discount %: For annual billing | Is Featured: Show as popular/recommended plan'
        }),
        ('Account Management Limits', {
            'fields': ('max_users', 'max_sites', 'max_industries', 'max_author_profiles'),
            'description': 'Persistent limits for account-level resources'
        }),
        ('Hard Limits (Persistent)', {
            'fields': ('max_keywords', 'max_clusters'),
            'description': 'Total allowed - never reset'
        }),
        ('Monthly Limits (Reset on Billing Cycle)', {
            'fields': ('max_content_ideas', 'max_content_words', 'max_images_basic', 'max_images_premium', 'max_image_prompts'),
            'description': 'Monthly allowances - reset at billing cycle'
        }),
        ('Billing & Credits', {
            'fields': ('included_credits', 'extra_credit_price', 'allow_credit_topup', 'auto_credit_topup_threshold', 'auto_credit_topup_amount', 'credits_per_month')
        }),
        ('Stripe Integration', {
            'fields': ('stripe_product_id', 'stripe_price_id')
        }),
    )


class AccountResource(resources.ModelResource):
    """Resource class for exporting Accounts"""
    class Meta:
        model = Account
        fields = ('id', 'name', 'slug', 'owner__email', 'plan__name', 'status', 
                  'credits', 'billing_country', 'created_at', 'updated_at')
        export_order = fields


@admin.register(Account)
class AccountAdmin(ExportMixin, AccountAdminMixin, SimpleHistoryAdmin, Igny8ModelAdmin):
    resource_class = AccountResource
    form = AccountAdminForm
    list_display = ['name', 'slug', 'owner', 'plan', 'status', 'health_indicator', 'credits', 'created_at']
    list_filter = ['status', 'plan']
    search_fields = ['name', 'slug']
    readonly_fields = ['created_at', 'updated_at', 'health_indicator', 'health_details']
    
    def get_queryset(self, request):
        """Override to filter by account for non-superusers"""
        qs = super().get_queryset(request)
        if request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer()):
            return qs
        # Owners can see their own accounts
        if hasattr(request.user, 'role') and request.user.role == 'owner':
            return qs.filter(owner=request.user)
        # Admins can see their account
        try:
            user_account = getattr(request.user, 'account', None)
            if user_account:
                return qs.filter(id=user_account.id)
        except (AttributeError, Exception):
            # If account access fails (e.g., column mismatch), return empty
            pass
        return qs.none()
    
    def health_indicator(self, obj):
        """Display health status with visual indicator"""
        from django.utils.html import format_html
        from django.utils import timezone
        from datetime import timedelta
        
        # Check credits
        if obj.credits < 10:
            status = 'critical'
            message = 'Critical: Very low credits'
        elif obj.credits < 100:
            status = 'warning'
            message = 'Warning: Low credits'
        else:
            status = 'good'
            message = 'Good'
        
        # Check for recent failed automations
        try:
            from igny8_core.business.automation.models import AutomationRun
            week_ago = timezone.now() - timedelta(days=7)
            failed_runs = AutomationRun.objects.filter(
                account=obj,
                status='failed',
                created_at__gte=week_ago
            ).count()
            
            if failed_runs > 5:
                status = 'critical'
                message = f'Critical: {failed_runs} automation failures'
            elif failed_runs > 0:
                if status == 'good':
                    status = 'warning'
                    message = f'Warning: {failed_runs} automation failures'
        except:
            pass
        
        # Check account status
        if obj.status != 'active':
            status = 'critical'
            message = f'Critical: Account {obj.status}'
        
        colors = {
            'good': '#0bbf87',
            'warning': '#ff7a00',
            'critical': '#ef4444'
        }
        
        return format_html(
            '<span style="display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 6px; background-color: {}; color: white; font-weight: 500; font-size: 13px;">{}</span>',
            colors[status], message
        )
    health_indicator.short_description = 'Health'
    
    def health_details(self, obj):
        """Detailed health information"""
        from django.utils.html import format_html
        from django.utils import timezone
        from datetime import timedelta
        
        details = []
        
        # Credits status
        colors = {
            'critical': '#ef4444',
            'warning': '#ff7a00',
            'good': '#0bbf87'
        }
        
        if obj.credits < 10:
            details.append(f'<span style="color: {colors["critical"]}; font-weight: 600;">Critical:</span> Only {obj.credits} credits remaining')
        elif obj.credits < 100:
            details.append(f'<span style="color: {colors["warning"]}; font-weight: 600;">Warning:</span> Only {obj.credits} credits remaining')
        else:
            details.append(f'<span style="color: {colors["good"]}; font-weight: 600;">Credits:</span> {obj.credits} available')
        
        # Recent activity
        try:
            from igny8_core.modules.writer.models import Content
            week_ago = timezone.now() - timedelta(days=7)
            recent_content = Content.objects.filter(
                site__account=obj,
                created_at__gte=week_ago
            ).count()
            details.append(f'📚 <b>Activity:</b> {recent_content} content pieces created this week')
        except:
            pass
        
        # Failed automations
        try:
            from igny8_core.business.automation.models import AutomationRun
            week_ago = timezone.now() - timedelta(days=7)
            failed_runs = AutomationRun.objects.filter(
                account=obj,
                status='failed',
                created_at__gte=week_ago
            ).count()
            
            if failed_runs > 0:
                details.append(f'🔴 <b>Automations:</b> {failed_runs} failures this week')
            else:
                details.append(f'✅ <b>Automations:</b> No failures this week')
        except:
            pass
        
        # Failed syncs
        try:
            from igny8_core.business.integration.models import SyncEvent
            today = timezone.now().date()
            failed_syncs = SyncEvent.objects.filter(
                site__account=obj,
                success=False,
                created_at__date=today
            ).count()
            
            if failed_syncs > 0:
                details.append(f'⚠️ <b>Syncs:</b> {failed_syncs} failures today')
            else:
                details.append(f'✅ <b>Syncs:</b> No failures today')
        except:
            pass
        
        # Account status
        if obj.status == 'active':
            details.append(f'✅ <b>Status:</b> Active')
        else:
            details.append(f'🔴 <b>Status:</b> {obj.status.title()}')
        
        return format_html('<br>'.join(details))
    health_details.short_description = 'Health Details'

    def has_delete_permission(self, request, obj=None):
        if obj and getattr(obj, 'slug', '') == 'aws-admin':
            return False
        return super().has_delete_permission(request, obj)


@admin.register(Subscription)
class SubscriptionAdmin(AccountAdminMixin, Igny8ModelAdmin):
    list_display = ['account', 'status', 'current_period_start', 'current_period_end']
    list_filter = ['status']
    search_fields = ['account__name', 'stripe_subscription_id']
    readonly_fields = ['created_at', 'updated_at']


@admin.register(PasswordResetToken)
class PasswordResetTokenAdmin(Igny8ModelAdmin):
    list_display = ['user', 'token', 'used', 'expires_at', 'created_at']
    list_filter = ['used', 'expires_at', 'created_at']
    search_fields = ['user__email', 'token']
    readonly_fields = ['created_at', 'token']
    
    def get_queryset(self, request):
        """Filter by account for non-superusers"""
        qs = super().get_queryset(request)
        if request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer()):
            return qs
        user_account = getattr(request.user, 'account', None)
        if user_account:
            return qs.filter(user__account=user_account)
        return qs.none()


class SectorInline(TabularInline):
    """Inline admin for sectors within Site admin."""
    model = Sector
    extra = 0
    fields = ['industry_sector', 'name', 'slug', 'status', 'is_active', 'get_keywords_count', 'get_clusters_count']
    readonly_fields = ['get_keywords_count', 'get_clusters_count']
    
    def get_keywords_count(self, obj):
        if obj.pk:
            return getattr(obj, 'keywords_set', obj.keywords_set).count()
        return 0
    get_keywords_count.short_description = 'Keywords'
    
    def get_clusters_count(self, obj):
        if obj.pk:
            return getattr(obj, 'clusters_set', obj.clusters_set).count()
        return 0
    get_clusters_count.short_description = 'Clusters'


class SiteResource(resources.ModelResource):
    """Resource class for exporting Sites"""
    class Meta:
        model = Site
        fields = ('id', 'name', 'slug', 'account__name', 'industry__name', 'domain', 
                  'status', 'is_active', 'site_type', 'hosting_type', 'created_at')
        export_order = fields


@admin.register(Site)
class SiteAdmin(ExportMixin, AccountAdminMixin, Igny8ModelAdmin):
    resource_class = SiteResource
    list_display = ['name', 'slug', 'account', 'industry', 'domain', 'status', 'is_active', 'get_api_key_status', 'get_sectors_count']
    list_filter = ['status', 'is_active', 'account', 'industry', 'hosting_type']
    search_fields = ['name', 'slug', 'domain', 'industry__name']
    readonly_fields = ['created_at', 'updated_at', 'get_api_key_display']
    inlines = [SectorInline]
    actions = ['generate_api_keys']
    
    fieldsets = (
        ('Site Info', {
            'fields': ('name', 'slug', 'account', 'domain', 'description', 'industry', 'site_type', 'hosting_type', 'status', 'is_active')
        }),
        ('WordPress Integration', {
            'fields': ('get_api_key_display',),
            'description': 'WordPress integration API key. Use SiteIntegration model for full integration settings.'
        }),
        ('SEO Metadata', {
            'fields': ('seo_metadata',),
            'classes': ('collapse',)
        }),
        ('Timestamps', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )
    
    def get_api_key_display(self, obj):
        """Display API key with copy button"""
        if obj.wp_api_key:
            from django.utils.html import format_html
            return format_html(
                '<div style="display:flex; align-items:center; gap:10px;">'
                '<code style="background:#f0f0f0; padding:5px 10px; border-radius:3px;">{}</code>'
                '<button type="button" onclick="navigator.clipboard.writeText(\'{}\'); alert(\'API Key copied to clipboard!\');" '
                'style="padding:5px 10px; cursor:pointer;">Copy</button>'
                '</div>',
                obj.wp_api_key,
                obj.wp_api_key
            )
        return format_html('<em>No API key generated</em>')
    get_api_key_display.short_description = 'WordPress API Key'
    
    def get_api_key_status(self, obj):
        """Show API key status in list view"""
        from django.utils.html import format_html
        if obj.wp_api_key:
            return format_html('<span style="color:green;">●</span> Active')
        return format_html('<span style="color:gray;">○</span> None')
    get_api_key_status.short_description = 'API Key'
    
    def generate_api_keys(self, request, queryset):
        """Generate API keys for selected sites"""
        import secrets
        updated_count = 0
        for site in queryset:
            if not site.wp_api_key:
                site.wp_api_key = f"igny8_{''.join(secrets.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789') for _ in range(40))}"
                site.save()
                updated_count += 1
        self.message_user(request, f'Generated API keys for {updated_count} site(s). Sites with existing keys were skipped.')
    generate_api_keys.short_description = 'Generate WordPress API Keys'
    
    def get_sectors_count(self, obj):
        try:
            return obj.get_active_sectors_count()
        except:
            return 0
    get_sectors_count.short_description = 'Active Sectors'
    
    def get_industry_display(self, obj):
        """Safely get industry name"""
        try:
            return obj.industry.name if obj.industry else '-'
        except:
            return '-'
    get_industry_display.short_description = 'Industry'


@admin.register(Sector)
class SectorAdmin(AccountAdminMixin, Igny8ModelAdmin):
    list_display = ['name', 'slug', 'site', 'industry_sector', 'get_industry', 'status', 'is_active', 'get_keywords_count', 'get_clusters_count']
    list_filter = ['status', 'is_active', 'site', 'industry_sector__industry']
    search_fields = ['name', 'slug', 'site__name', 'industry_sector__name']
    readonly_fields = ['created_at', 'updated_at']
    
    def get_industry(self, obj):
        """Safely get industry name"""
        try:
            if obj.industry_sector and obj.industry_sector.industry:
                return obj.industry_sector.industry.name
        except:
            pass
        return '-'
    get_industry.short_description = 'Industry'
    
    def get_keywords_count(self, obj):
        """Safely get keywords count"""
        try:
            if obj.pk:
                return getattr(obj, 'keywords_set', obj.keywords_set).count()
        except:
            pass
        return 0
    get_keywords_count.short_description = 'Keywords'
    
    def get_clusters_count(self, obj):
        """Safely get clusters count"""
        try:
            if obj.pk:
                return getattr(obj, 'clusters_set', obj.clusters_set).count()
        except:
            pass
        return 0
    get_clusters_count.short_description = 'Clusters'


@admin.register(SiteUserAccess)
class SiteUserAccessAdmin(Igny8ModelAdmin):
    list_display = ['user', 'site', 'granted_at', 'granted_by']
    list_filter = ['granted_at']
    search_fields = ['user__email', 'site__name']
    readonly_fields = ['granted_at']


class IndustrySectorInline(TabularInline):
    """Inline admin for industry sectors within Industry admin."""
    model = IndustrySector
    extra = 0
    fields = ['name', 'slug', 'description', 'is_active']
    readonly_fields = []


@admin.register(Industry)
class IndustryAdmin(Igny8ModelAdmin):
    list_display = ['name', 'slug', 'is_active', 'get_sectors_count', 'created_at']
    list_filter = ['is_active']
    search_fields = ['name', 'slug', 'description']
    readonly_fields = ['created_at', 'updated_at']
    inlines = [IndustrySectorInline]
    actions = ['delete_selected']  # Enable bulk delete
    
    def get_sectors_count(self, obj):
        return obj.sectors.filter(is_active=True).count()
    get_sectors_count.short_description = 'Active Sectors'
    
    def has_delete_permission(self, request, obj=None):
        """Allow deletion for superusers and developers"""
        return request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer())


@admin.register(IndustrySector)
class IndustrySectorAdmin(Igny8ModelAdmin):
    list_display = ['name', 'slug', 'industry', 'is_active']
    list_filter = ['is_active', 'industry']
    search_fields = ['name', 'slug', 'description']
    readonly_fields = ['created_at', 'updated_at']
    actions = ['delete_selected']  # Enable bulk delete
    
    def has_delete_permission(self, request, obj=None):
        """Allow deletion for superusers and developers"""
        return request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer())


@admin.register(SeedKeyword)
class SeedKeywordAdmin(Igny8ModelAdmin):
    """SeedKeyword admin - Global reference data, no account filtering"""
    list_display = ['keyword', 'industry', 'sector', 'volume', 'difficulty', 'intent', 'is_active', 'created_at']
    list_filter = ['is_active', 'industry', 'sector', 'intent']
    search_fields = ['keyword']
    readonly_fields = ['created_at', 'updated_at']
    actions = ['delete_selected']  # Enable bulk delete
    
    fieldsets = (
        ('Keyword Info', {
            'fields': ('keyword', 'industry', 'sector', 'is_active')
        }),
        ('SEO Metrics', {
            'fields': ('volume', 'difficulty', 'intent')
        }),
        ('Timestamps', {
            'fields': ('created_at', 'updated_at')
        }),
    )
    
    def has_delete_permission(self, request, obj=None):
        """Allow deletion for superusers and developers"""
        return request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer())


class UserResource(resources.ModelResource):
    """Resource class for exporting Users"""
    class Meta:
        model = User
        fields = ('id', 'email', 'username', 'account__name', 'role', 
                  'is_active', 'is_staff', 'created_at', 'last_login')
        export_order = fields


@admin.register(User)
class UserAdmin(ExportMixin, BaseUserAdmin, Igny8ModelAdmin):
    """
    User admin using both Django's BaseUserAdmin (for user-specific functionality)
    and Unfold's ModelAdmin (for modern UI and styling including popups)
    """
    resource_class = UserResource
    list_display = ['email', 'username', 'account', 'role', 'is_active', 'is_staff', 'created_at']
    list_filter = ['role', 'account', 'is_active', 'is_staff']
    search_fields = ['email', 'username']
    readonly_fields = ['created_at', 'updated_at']
    
    fieldsets = BaseUserAdmin.fieldsets + (
        ('IGNY8 Info', {'fields': ('account', 'role')}),
        ('Timestamps', {'fields': ('created_at', 'updated_at')}),
    )
    
    add_fieldsets = BaseUserAdmin.add_fieldsets + (
        ('IGNY8 Info', {'fields': ('account', 'role')}),
    )
    
    def get_queryset(self, request):
        """Filter users by account for non-superusers"""
        qs = super().get_queryset(request)
        if request.user.is_superuser or (hasattr(request.user, 'is_developer') and request.user.is_developer()):
            return qs
        user_account = getattr(request.user, 'account', None)
        if user_account:
            return qs.filter(account=user_account)
        return qs.none()
    
    def get_account_display(self, obj):
        """Safely get account name"""
        try:
            account = getattr(obj, 'account', None)
            return account.name if account else '-'
        except:
            return '-'
    get_account_display.short_description = 'Account'