"""
Interface d'administration pour les modèles Analytics.
"""

from django.contrib import admin
from django.utils.html import format_html
from django.urls import reverse
from django.utils.translation import gettext_lazy as _
from .models import PageView, UserSession, DailyPageViewSummary


@admin.register(PageView)
class PageViewAdmin(admin.ModelAdmin):
    """Interface d'administration pour les vues de pages."""
    
    list_display = [
        'timestamp', 'user_link', 'path', 'method', 
        'response_time_colored', 'ip_address'
    ]
    list_filter = [
        'method', 'timestamp', 
        ('user', admin.RelatedOnlyFieldListFilter),
    ]
    search_fields = ['path', 'user__username', 'ip_address', 'full_url']
    readonly_fields = [
        'user', 'session_key', 'path', 'full_url', 'method',
        'timestamp', 'ip_address', 'user_agent', 'referer', 'response_time_ms'
    ]
    date_hierarchy = 'timestamp'
    ordering = ['-timestamp']
    
    # Pagination
    list_per_page = 50
    
    def user_link(self, obj):
        """Lien vers la page de l'utilisateur."""
        if obj.user:
            url = reverse('admin:auth_user_change', args=[obj.user.id])
            return format_html('<a href="{}">{}</a>', url, obj.user.username)
        return _("Anonyme")
    user_link.short_description = _("Utilisateur")
    
    def response_time_colored(self, obj):
        """Affiche le temps de réponse avec une couleur selon la performance."""
        if obj.response_time_ms is None:
            return '-'
        
        # Définir les seuils de couleur
        if obj.response_time_ms < 100:
            color = 'green'
        elif obj.response_time_ms < 500:
            color = 'orange'
        else:
            color = 'red'
        
        return format_html(
            '<span style="color: {}; font-weight: bold;">{} ms</span>',
            color,
            obj.response_time_ms
        )
    response_time_colored.short_description = _("Temps de réponse")
    response_time_colored.admin_order_field = 'response_time_ms'
    
    def has_add_permission(self, request):
        """Désactiver l'ajout manuel."""
        return False
    
    def has_change_permission(self, request, obj=None):
        """Désactiver la modification."""
        return False


@admin.register(UserSession)
class UserSessionAdmin(admin.ModelAdmin):
    """Interface d'administration pour les sessions utilisateurs."""
    
    list_display = [
        'login_time', 'user_link', 'duration_formatted',
        'page_views_count', 'status_colored', 'ip_address'
    ]
    list_filter = [
        'is_active', 'login_time',
        ('user', admin.RelatedOnlyFieldListFilter),
    ]
    search_fields = ['user__username', 'session_key', 'ip_address']
    readonly_fields = [
        'user', 'session_key', 'login_time', 'last_activity',
        'logout_time', 'ip_address', 'user_agent', 'page_views_count',
        'is_active', 'duration_formatted'
    ]
    date_hierarchy = 'login_time'
    ordering = ['-login_time']
    
    # Pagination
    list_per_page = 50
    
    def user_link(self, obj):
        """Lien vers la page de l'utilisateur."""
        url = reverse('admin:auth_user_change', args=[obj.user.id])
        return format_html('<a href="{}">{}</a>', url, obj.user.username)
    user_link.short_description = _("Utilisateur")
    
    def status_colored(self, obj):
        """Affiche le statut avec une couleur."""
        if obj.is_active:
            return format_html(
                '<span style="color: green; font-weight: bold;">● {}</span>',
                _("Active")
            )
        else:
            return format_html(
                '<span style="color: gray;">○ {}</span>',
                _("Terminée")
            )
    status_colored.short_description = _("Statut")
    status_colored.admin_order_field = 'is_active'
    
    def duration_formatted(self, obj):
        """Affiche la durée de la session formatée."""
        seconds = obj.duration_seconds
        if seconds < 60:
            return f"{int(seconds)}s"
        elif seconds < 3600:
            minutes = int(seconds / 60)
            return f"{minutes}min"
        else:
            hours = int(seconds / 3600)
            minutes = int((seconds % 3600) / 60)
            return f"{hours}h {minutes}min"
    duration_formatted.short_description = _("Durée")
    
    def has_add_permission(self, request):
        """Désactiver l'ajout manuel."""
        return False
    
    def has_change_permission(self, request, obj=None):
        """Désactiver la modification."""
        return False


@admin.register(DailyPageViewSummary)
class DailyPageViewSummaryAdmin(admin.ModelAdmin):
    """Interface d'administration pour les résumés quotidiens."""

    list_display = [
        'date', 'total_page_views', 'unique_users',
        'unique_sessions', 'total_sessions_started',
        'avg_response_colored',
    ]
    list_filter = ['date']
    search_fields = ['date']
    readonly_fields = [
        'date', 'total_page_views', 'unique_users', 'unique_sessions',
        'unique_ips', 'avg_response_time_ms', 'max_response_time_ms',
        'top_paths', 'top_users', 'method_counts',
        'total_sessions_started', 'created_at', 'updated_at',
    ]
    date_hierarchy = 'date'
    ordering = ['-date']
    list_per_page = 50

    def avg_response_colored(self, obj):
        """Affiche le temps de réponse moyen avec couleur."""
        if obj.avg_response_time_ms is None:
            return '-'
        val = obj.avg_response_time_ms
        if val < 100:
            color = 'green'
        elif val < 500:
            color = 'orange'
        else:
            color = 'red'
        return format_html(
            '<span style="color: {}; font-weight: bold;">{} ms</span>',
            color,
            f'{val:.0f}',
        )
    avg_response_colored.short_description = _("Temps de rép. moyen")
    avg_response_colored.admin_order_field = 'avg_response_time_ms'

    def has_add_permission(self, request):
        return False

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