from django.contrib import admin

from tracker.models import DoseLog, Medication, PulseReading, ScheduledDose


class ScheduledDoseInline(admin.TabularInline):
    """Edit a medication's daily doses right on the medication page."""

    model = ScheduledDose
    extra = 1


@admin.register(Medication)
class MedicationAdmin(admin.ModelAdmin):
    list_display = ["name", "is_active", "schedule_summary"]
    list_filter = ["is_active"]
    search_fields = ["name"]
    inlines = [ScheduledDoseInline]

    @admin.display(description="Schedule")
    def schedule_summary(self, obj: Medication) -> str:
        doses = obj.scheduled_doses.filter(is_active=True)
        if not doses:
            return "—"
        return ", ".join(
            f"{d.amount} {d.get_time_of_day_display().lower()}" for d in doses
        )


@admin.register(ScheduledDose)
class ScheduledDoseAdmin(admin.ModelAdmin):
    list_display = ["medication", "time_of_day", "amount", "is_active"]
    list_filter = ["is_active", "time_of_day", "medication"]


@admin.register(DoseLog)
class DoseLogAdmin(admin.ModelAdmin):
    """The history. Day-to-day ticking off happens on the Today page."""

    list_display = ["date", "scheduled_dose", "taken", "taken_at"]
    list_filter = ["taken", "date", "scheduled_dose__medication"]
    date_hierarchy = "date"


@admin.register(PulseReading)
class PulseReadingAdmin(admin.ModelAdmin):
    list_display = ["date", "bpm", "notes"]
    date_hierarchy = "date"