from django.contrib import admin

from access_core.governance.models import (
    AuditEvent,
    CareTeamReviewTask,
    ClinicalEventLog,
    ClinicalReviewTask,
    PhysicianReview,
    PseudonymousCaseRecord,
    PseudonymousClinicalPacket,
    SafetySignalEvent,
)


@admin.register(PhysicianReview)
class PhysicianReviewAdmin(admin.ModelAdmin):
    list_display = ["review_type", "decision", "reviewed_by", "reviewed_at"]
    list_filter = ["review_type", "decision"]


@admin.register(ClinicalReviewTask)
class ClinicalReviewTaskAdmin(admin.ModelAdmin):
    list_display = ["assigned_to", "task_type", "status", "assigned_at"]
    list_filter = ["task_type", "status"]


@admin.register(SafetySignalEvent)
class SafetySignalEventAdmin(admin.ModelAdmin):
    list_display = [
        "beneficiary",
        "signal_severity",
        "signal_type",
        "review_status",
        "created_at",
    ]
    list_filter = ["signal_severity", "signal_type", "review_status"]


@admin.register(ClinicalEventLog)
class ClinicalEventLogAdmin(admin.ModelAdmin):
    list_display = ["beneficiary", "event_type", "event_date", "requires_review"]
    list_filter = ["event_type", "requires_review"]


@admin.register(CareTeamReviewTask)
class CareTeamReviewTaskAdmin(admin.ModelAdmin):
    list_display = ["beneficiary", "trigger_type", "priority", "status", "assigned_at"]
    list_filter = ["trigger_type", "priority", "status"]


@admin.register(AuditEvent)
class AuditEventAdmin(admin.ModelAdmin):
    """Read-only by design — the audit trail is append-only (see governance/audit.py)."""

    list_display = [
        "created_at",
        "user",
        "action",
        "target_table",
        "target_record_id",
        "ip_address",
    ]
    list_filter = ["action"]
    search_fields = ["target_table", "target_record_id"]
    readonly_fields = [f.name for f in AuditEvent._meta.fields]

    def has_add_permission(self, request):
        return False

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


@admin.register(PseudonymousCaseRecord)
class PseudonymousCaseRecordAdmin(admin.ModelAdmin):
    list_display = ["case_id", "age_band", "sex", "clinical_track"]
    list_filter = ["clinical_track"]


@admin.register(PseudonymousClinicalPacket)
class PseudonymousClinicalPacketAdmin(admin.ModelAdmin):
    list_display = ["case_record", "packet_type", "review_status", "created_at"]
    list_filter = ["packet_type", "review_status"]