from django.contrib import admin
from .models import SSHCredential, Project, SSHLog, Customer, Invoice, InvoiceItem
from .system_settings import SystemSettings

@admin.register(SystemSettings)
class SystemSettingsAdmin(admin.ModelAdmin):
    list_display = ('__str__', 'backup_enabled', 'backup_frequency', 'updated_at')
    fieldsets = (
        ('Yedekleme Ayarları', {
            'fields': ('backup_enabled', 'backup_frequency', 'backup_hour', 'backup_minute', 
                      'backup_day_of_week', 'backup_day_of_month', 'backup_retention_days',
                      'backup_compression', 'backup_format', 'backup_directory')
        }),
        ('S3 Depolama', {
            'fields': ('use_s3_storage', 's3_access_key', 's3_secret_key', 
                      's3_bucket_name', 's3_region')
        }),
        ('Bildirim Ayarları', {
            'fields': ('email_notifications', 'notification_email')
        }),
        ('SSH Ayarları', {
            'fields': ('ssh_key_path', 'ssh_key_passphrase')
        }),
        ('Crontab Bilgisi', {
            'fields': ('backup_crontab_expression', 'updated_at'),
            'classes': ('collapse',)
        })
    )
    readonly_fields = ('backup_crontab_expression', 'updated_at')

    def has_add_permission(self, request):
        # Sadece bir kayıt olabilir
        return SystemSettings.objects.count() == 0

    def has_delete_permission(self, request, obj=None):
        # Silme işlemi engellenir
        return False

@admin.register(SSHCredential)
class SSHCredentialAdmin(admin.ModelAdmin):
    list_display = ('hostname', 'username', 'port', 'is_online', 'last_check')
    list_filter = ('is_online', 'created_at')
    search_fields = ('hostname', 'username')
    readonly_fields = ('is_online', 'last_check', 'created_at')
    fieldsets = (
        ('Bağlantı Bilgileri', {
            'fields': ('hostname', 'username', 'password', 'port')
        }),
        ('Durum Bilgisi', {
            'fields': ('is_online', 'last_check', 'created_at'),
            'classes': ('collapse',)
        }),
    )

@admin.register(Project)
class ProjectAdmin(admin.ModelAdmin):
    list_display = ('name', 'folder_name', 'url', 'ssh_credential', 'created_at')
    list_filter = ('ssh_credential', 'created_at')
    search_fields = ('name', 'folder_name', 'url')
    readonly_fields = ('created_at', 'updated_at')
    fieldsets = (
        ('Temel Bilgiler', {
            'fields': ('name', 'folder_name', 'ssh_credential')
        }),
        ('Domain Bilgisi', {
            'fields': ('url',),
            'description': 'Nginx konfigürasyonu için domain adı (Örnek: example.com)'
        }),
        ('Zaman Bilgileri', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    def get_full_path(self, obj):
        return obj.get_full_path()
    get_full_path.short_description = 'Tam Yol'

@admin.register(SSHLog)
class SSHLogAdmin(admin.ModelAdmin):
    list_display = ('ssh_credential', 'log_type', 'command', 'status', 'created_at')
    list_filter = ('log_type', 'status', 'created_at')
    search_fields = ('command', 'output')
    readonly_fields = ('created_at',)
    fieldsets = (
        ('Log Detayları', {
            'fields': ('ssh_credential', 'log_type', 'command', 'status')
        }),
        ('Çıktı', {
            'fields': ('output',),
            'classes': ('wide',)
        }),
        ('Zaman Bilgisi', {
            'fields': ('created_at',),
            'classes': ('collapse',)
        }),
    )

    def get_queryset(self, request):
        return super().get_queryset(request).select_related('ssh_credential')

    def has_add_permission(self, request):
        return False  # Log kayıtları manuel olarak eklenemez

    def has_change_permission(self, request, obj=None):
        return False  # Log kayıtları değiştirilemez

class InvoiceItemInline(admin.TabularInline):
    model = InvoiceItem
    extra = 1
    fields = ('project', 'description', 'amount')
    
    def get_formset(self, request, obj=None, **kwargs):
        formset = super().get_formset(request, obj, **kwargs)
        form = formset.form
        form.base_fields['description'].widget.attrs['style'] = 'width: 300px'
        return formset


@admin.register(Invoice)
class InvoiceAdmin(admin.ModelAdmin):
    list_display = ('invoice_number', 'customer', 'issue_date', 'due_date', 'status', 'total_amount')
    list_filter = ('status', 'issue_date', 'payment_method')
    search_fields = ('invoice_number', 'customer__name', 'customer__company_name')
    readonly_fields = ('invoice_number', 'total_amount', 'created_at', 'updated_at')
    inlines = [InvoiceItemInline]
    date_hierarchy = 'issue_date'
    
    fieldsets = (
        ('Fatura Bilgileri', {
            'fields': ('invoice_number', 'customer', 'issue_date', 'due_date', 'status', 'payment_method')
        }),
        ('Tutar Bilgileri', {
            'fields': ('total_amount',)
        }),
        ('Ek Bilgiler', {
            'fields': ('notes', 'payment_notes'),
            'classes': ('collapse',)
        }),
        ('Sistem Bilgileri', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        })
    )
    
    def get_queryset(self, request):
        return super().get_queryset(request).select_related('customer')

@admin.register(InvoiceItem)
class InvoiceItemAdmin(admin.ModelAdmin):
    list_display = ('invoice', 'description', 'project', 'amount')
    list_filter = ('invoice__status',)
    search_fields = ('description', 'invoice__invoice_number', 'project__name')
    
    def get_queryset(self, request):
        return super().get_queryset(request).select_related('invoice', 'project')