from django.contrib import admin
from django.contrib.gis.admin import GISModelAdmin
from django.utils.html import format_html
import pghistory.models
from .models import (
    Park,
    ParkArea,
    ParkLocation,
    Company,
    CompanyHeadquarters,
    ParkReview,
)


class ParkLocationInline(admin.StackedInline):
    """Inline admin for ParkLocation"""

    model = ParkLocation
    extra = 0
    fields = (
        ("city", "state", "country"),
        "street_address",
        "postal_code",
        "point",
        ("highway_exit", "best_arrival_time"),
        "parking_notes",
        "seasonal_notes",
        ("osm_id", "osm_type"),
    )


class ParkLocationAdmin(GISModelAdmin):
    """Admin for standalone ParkLocation management"""

    list_display = (
        "park",
        "city",
        "state",
        "country",
        "latitude",
        "longitude",
    )
    list_filter = ("country", "state")
    search_fields = (
        "park__name",
        "city",
        "state",
        "country",
        "street_address",
    )
    readonly_fields = ("latitude", "longitude", "coordinates")
    fieldsets = (
        ("Park", {"fields": ("park",)}),
        (
            "Address",
            {
                "fields": (
                    "street_address",
                    "city",
                    "state",
                    "country",
                    "postal_code",
                )
            },
        ),
        (
            "Geographic Coordinates",
            {
                "fields": ("point", "latitude", "longitude", "coordinates"),
                "description": "Set coordinates by clicking on the map or entering latitude/longitude",
            },
        ),
        (
            "Travel Information",
            {
                "fields": (
                    "highway_exit",
                    "best_arrival_time",
                    "parking_notes",
                    "seasonal_notes",
                ),
                "classes": ("collapse",),
            },
        ),
        (
            "OpenStreetMap Integration",
            {"fields": ("osm_id", "osm_type"), "classes": ("collapse",)},
        ),
    )

    @admin.display(description="Latitude")
    def latitude(self, obj):
        return obj.latitude

    @admin.display(description="Longitude")
    def longitude(self, obj):
        return obj.longitude


class ParkAdmin(admin.ModelAdmin):
    list_display = (
        "name",
        "formatted_location",
        "status",
        "operator",
        "property_owner",
        "created_at",
        "updated_at",
    )
    list_filter = ("status", "location__country", "location__state")
    search_fields = (
        "name",
        "description",
        "location__city",
        "location__state",
        "location__country",
    )
    readonly_fields = ("created_at", "updated_at")
    prepopulated_fields = {"slug": ("name",)}
    inlines = [ParkLocationInline]

    @admin.display(description="Location")
    def formatted_location(self, obj):
        """Display formatted location string"""
        return obj.formatted_location


class ParkAreaAdmin(admin.ModelAdmin):
    list_display = ("name", "park", "created_at", "updated_at")
    list_filter = ("park",)
    search_fields = ("name", "description", "park__name")
    readonly_fields = ("created_at", "updated_at")
    prepopulated_fields = {"slug": ("name",)}


class CompanyHeadquartersInline(admin.StackedInline):
    """Inline admin for CompanyHeadquarters"""

    model = CompanyHeadquarters
    extra = 0
    fields = (
        ("city", "state_province", "country"),
        "street_address",
        "postal_code",
        "mailing_address",
    )


class CompanyHeadquartersAdmin(admin.ModelAdmin):
    """Admin for standalone CompanyHeadquarters management"""

    list_display = (
        "company",
        "location_display",
        "city",
        "country",
        "created_at",
    )
    list_filter = ("country", "state_province")
    search_fields = (
        "company__name",
        "city",
        "state_province",
        "country",
        "street_address",
    )
    readonly_fields = ("created_at", "updated_at")
    fieldsets = (
        ("Company", {"fields": ("company",)}),
        (
            "Address",
            {
                "fields": (
                    "street_address",
                    "city",
                    "state_province",
                    "country",
                    "postal_code",
                )
            },
        ),
        (
            "Additional Information",
            {"fields": ("mailing_address",), "classes": ("collapse",)},
        ),
        (
            "Metadata",
            {"fields": ("created_at", "updated_at"), "classes": ("collapse",)},
        ),
    )


class CompanyAdmin(admin.ModelAdmin):
    """Enhanced Company admin with headquarters inline"""

    list_display = (
        "name",
        "roles_display",
        "headquarters_location",
        "website",
        "founded_year",
    )
    list_filter = ("roles",)
    search_fields = ("name", "description")
    readonly_fields = ("created_at", "updated_at")
    prepopulated_fields = {"slug": ("name",)}
    inlines = [CompanyHeadquartersInline]

    @admin.display(description="Roles")
    def roles_display(self, obj):
        """Display roles as a formatted string"""
        return ", ".join(obj.roles) if obj.roles else "No roles"

    @admin.display(description="Headquarters")
    def headquarters_location(self, obj):
        """Display headquarters location if available"""
        if hasattr(obj, "headquarters"):
            return obj.headquarters.location_display
        return "No headquarters"


@admin.register(ParkReview)
class ParkReviewAdmin(admin.ModelAdmin):
    """Admin interface for park reviews"""

    list_display = (
        "park",
        "user",
        "rating",
        "title",
        "visit_date",
        "is_published",
        "created_at",
        "moderation_status",
    )
    list_filter = (
        "rating",
        "is_published",
        "visit_date",
        "created_at",
        "park",
        "moderated_by",
    )
    search_fields = (
        "title",
        "content",
        "user__username",
        "park__name",
    )
    readonly_fields = ("created_at", "updated_at")
    date_hierarchy = "created_at"
    ordering = ("-created_at",)

    fieldsets = (
        (
            "Review Details",
            {
                "fields": (
                    "user",
                    "park",
                    "rating",
                    "title",
                    "content",
                    "visit_date",
                )
            },
        ),
        (
            "Publication Status",
            {
                "fields": ("is_published",),
            },
        ),
        (
            "Moderation",
            {
                "fields": (
                    "moderated_by",
                    "moderated_at",
                    "moderation_notes",
                ),
                "classes": ("collapse",),
            },
        ),
        (
            "Metadata",
            {
                "fields": ("created_at", "updated_at"),
                "classes": ("collapse",),
            },
        ),
    )

    @admin.display(description="Moderation Status", boolean=True)
    def moderation_status(self, obj):
        """Display moderation status with color coding"""
        if obj.moderated_by:
            return format_html(
                '<span style="color: {};">{}</span>',
                "green" if obj.is_published else "red",
                "Approved" if obj.is_published else "Rejected",
            )
        return format_html('<span style="color: orange;">Pending</span>')

    def save_model(self, request, obj, form, change):
        """Auto-set moderation info when status changes"""
        if change and "is_published" in form.changed_data:
            from django.utils import timezone

            obj.moderated_by = request.user
            obj.moderated_at = timezone.now()
        super().save_model(request, obj, form, change)


@admin.register(pghistory.models.Events)
class PgHistoryEventsAdmin(admin.ModelAdmin):
    """Admin interface for pghistory Events"""

    list_display = (
        "pgh_id",
        "pgh_created_at",
        "pgh_label",
        "pgh_model",
        "pgh_obj_id",
        "pgh_context_display",
    )
    list_filter = (
        "pgh_label",
        "pgh_model",
        "pgh_created_at",
    )
    search_fields = (
        "pgh_obj_id",
        "pgh_context",
    )
    readonly_fields = (
        "pgh_id",
        "pgh_created_at",
        "pgh_label",
        "pgh_model",
        "pgh_obj_id",
        "pgh_context",
        "pgh_data",
    )
    date_hierarchy = "pgh_created_at"
    ordering = ("-pgh_created_at",)

    fieldsets = (
        (
            "Event Information",
            {
                "fields": (
                    "pgh_id",
                    "pgh_created_at",
                    "pgh_label",
                    "pgh_model",
                    "pgh_obj_id",
                )
            },
        ),
        (
            "Context & Data",
            {
                "fields": (
                    "pgh_context",
                    "pgh_data",
                ),
                "classes": ("collapse",),
            },
        ),
    )

    @admin.display(description="Context")
    def pgh_context_display(self, obj):
        """Display context information in a readable format"""
        if obj.pgh_context:
            if isinstance(obj.pgh_context, dict):
                context_items = []
                for key, value in obj.pgh_context.items():
                    context_items.append(f"{key}: {value}")
                return ", ".join(context_items)
            return str(obj.pgh_context)
        return "No context"

    def has_add_permission(self, request):
        """Disable manual creation of history events"""
        return False

    def has_change_permission(self, request, obj=None):
        """Make history events read-only"""
        return False

    def has_delete_permission(self, request, obj=None):
        """Prevent deletion of history events"""
        return getattr(request.user, "is_superuser", False)


# Register the models with their admin classes
admin.site.register(Park, ParkAdmin)
admin.site.register(ParkArea, ParkAreaAdmin)
admin.site.register(ParkLocation, ParkLocationAdmin)
admin.site.register(Company, CompanyAdmin)
admin.site.register(CompanyHeadquarters, CompanyHeadquartersAdmin)