"use server";

import { and, eq } from "drizzle-orm";
import { revalidatePath } from "next/cache";
import { z } from "zod";
import type { ApiAuthContext } from "@/lib/api-auth";
import { db } from "@/lib/db";
import { getCurrentSession } from "@/lib/session";
import { logActivityForScope } from "@/modules/_core/activity";
import { cancelReminder, listReminderOffsets } from "@/modules/_core/reminders";
import { petAppointments, petPrescriptions, pets, petVaccinations } from "../schema";
import { syncPetAppointmentReminders, syncPetDueDateReminder } from "./reminders";
import {
  appointmentInput,
  appointmentUpdateInput,
  petInput,
  petUpdateInput,
  prescriptionInput,
  prescriptionUpdateInput,
  vaccinationInput,
  vaccinationUpdateInput,
} from "./schemas";

type Scope = Pick<ApiAuthContext, "householdId" | "userId">;
const idInput = z.object({ id: z.string().uuid() });

async function requirePet(scope: Scope, id: string) {
  const [pet] = await db
    .select()
    .from(pets)
    .where(and(eq(pets.id, id), eq(pets.householdId, scope.householdId)))
    .limit(1);
  if (!pet) throw new Error("Pet not found");
  return pet;
}

async function requireAppointment(scope: Scope, id: string) {
  const [row] = await db
    .select()
    .from(petAppointments)
    .where(and(eq(petAppointments.id, id), eq(petAppointments.householdId, scope.householdId)))
    .limit(1);
  if (!row) throw new Error("Record not found");
  return row;
}
async function requireVaccination(scope: Scope, id: string) {
  const [row] = await db
    .select()
    .from(petVaccinations)
    .where(and(eq(petVaccinations.id, id), eq(petVaccinations.householdId, scope.householdId)))
    .limit(1);
  if (!row) throw new Error("Record not found");
  return row;
}
async function requirePrescription(scope: Scope, id: string) {
  const [row] = await db
    .select()
    .from(petPrescriptions)
    .where(and(eq(petPrescriptions.id, id), eq(petPrescriptions.householdId, scope.householdId)))
    .limit(1);
  if (!row) throw new Error("Record not found");
  return row;
}

function revalidatePet(id: string) {
  revalidatePath("/pets");
  revalidatePath(`/pets/${id}`);
}

export async function createPetForScope(scope: Scope, input: z.input<typeof petInput>) {
  const parsed = petInput.parse(input);
  const [pet] = await db
    .insert(pets)
    .values({
      householdId: scope.householdId,
      ...parsed,
      breed: parsed.breed ?? null,
      birthDate: parsed.birthDate ?? null,
      notes: parsed.notes ?? null,
      primaryImageUrl: parsed.primaryImageUrl ?? parsed.images[0] ?? null,
    })
    .returning();
  if (!pet) throw new Error("Pet was not created");
  await logActivityForScope(scope, {
    entityType: "pets.pet",
    entityId: pet.id,
    action: "create",
    payload: { name: pet.name },
  });
  return pet;
}
export async function createPet(input: z.input<typeof petInput>) {
  const { household, user } = await getCurrentSession();
  const pet = await createPetForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePet(pet.id);
  return pet;
}

export async function updatePetForScope(
  scope: Scope,
  input: { id: string } & z.input<typeof petUpdateInput>,
) {
  const parsed = idInput.and(petUpdateInput).parse(input);
  await requirePet(scope, parsed.id);
  const { id, ...changes } = parsed;
  await db
    .update(pets)
    .set({ ...changes, updatedAt: new Date() })
    .where(eq(pets.id, id));
  await logActivityForScope(scope, { entityType: "pets.pet", entityId: id, action: "update" });
}
export async function updatePet(input: { id: string } & z.input<typeof petUpdateInput>) {
  const { household, user } = await getCurrentSession();
  await updatePetForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePet(input.id);
}

export async function deletePetForScope(scope: Scope, input: { id: string }) {
  const { id } = idInput.parse(input);
  const pet = await requirePet(scope, id);
  await logActivityForScope(scope, {
    entityType: "pets.pet",
    entityId: id,
    action: "delete",
    payload: { name: pet.name },
  });
  await db.delete(pets).where(eq(pets.id, id));
}
export async function deletePet(input: { id: string }) {
  const { household, user } = await getCurrentSession();
  await deletePetForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePath("/pets");
}

export async function createAppointmentForScope(
  scope: Scope,
  input: z.input<typeof appointmentInput>,
) {
  const parsed = appointmentInput.parse(input);
  const pet = await requirePet(scope, parsed.petId);
  const [row] = await db
    .insert(petAppointments)
    .values({
      householdId: scope.householdId,
      petId: parsed.petId,
      title: parsed.title,
      appointmentAt: parsed.appointmentAt,
      clinic: parsed.clinic ?? null,
      notes: parsed.notes ?? null,
    })
    .returning();
  if (!row) throw new Error("Appointment was not created");
  if (scope.userId)
    await syncPetAppointmentReminders({
      householdId: scope.householdId,
      appointmentId: row.id,
      appointmentAt: row.appointmentAt,
      createdBy: scope.userId,
      petName: pet.name,
      title: row.title,
      offsets: parsed.reminderOffsets,
    });
  return row;
}
export async function updateAppointmentForScope(
  scope: Scope,
  input: { id: string } & z.input<typeof appointmentUpdateInput>,
) {
  const parsed = idInput.and(appointmentUpdateInput).parse(input);
  const row = await requireAppointment(scope, parsed.id);
  const pet = await requirePet(scope, row.petId);
  const offsets = parsed.reminderOffsets ?? (await listReminderOffsets("pets.appointment", row.id));
  const { id, reminderOffsets: _, ...changes } = parsed;
  const [updated] = await db
    .update(petAppointments)
    .set({ ...changes, updatedAt: new Date() })
    .where(eq(petAppointments.id, id))
    .returning();
  if (!updated) throw new Error("Appointment not found");
  if (scope.userId)
    await syncPetAppointmentReminders({
      householdId: scope.householdId,
      appointmentId: id,
      appointmentAt: updated.appointmentAt,
      createdBy: scope.userId,
      petName: pet.name,
      title: updated.title,
      offsets,
    });
  return updated;
}
export async function deleteAppointmentForScope(scope: Scope, input: { id: string }) {
  const { id } = idInput.parse(input);
  await requireAppointment(scope, id);
  await cancelReminder("pets.appointment", id);
  await db.delete(petAppointments).where(eq(petAppointments.id, id));
}

export async function createAppointment(input: z.input<typeof appointmentInput>) {
  const { household, user } = await getCurrentSession();
  const row = await createAppointmentForScope(
    { householdId: household.id, userId: user.id },
    input,
  );
  revalidatePet(row.petId);
  return row;
}
export async function updateAppointment(
  input: { id: string } & z.input<typeof appointmentUpdateInput>,
) {
  const { household, user } = await getCurrentSession();
  const row = await updateAppointmentForScope(
    { householdId: household.id, userId: user.id },
    input,
  );
  revalidatePet(row.petId);
  return row;
}
export async function deleteAppointment(input: { id: string }) {
  const { household, user } = await getCurrentSession();
  const row = await requireAppointment({ householdId: household.id, userId: user.id }, input.id);
  await deleteAppointmentForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePet(row.petId);
}

export async function createVaccinationForScope(
  scope: Scope,
  input: z.input<typeof vaccinationInput>,
) {
  const parsed = vaccinationInput.parse(input);
  const pet = await requirePet(scope, parsed.petId);
  const [row] = await db
    .insert(petVaccinations)
    .values({
      householdId: scope.householdId,
      ...parsed,
      dueOn: parsed.dueOn ?? null,
      provider: parsed.provider ?? null,
      notes: parsed.notes ?? null,
    })
    .returning();
  if (!row) throw new Error("Vaccination was not created");
  if (scope.userId)
    await syncPetDueDateReminder({
      householdId: scope.householdId,
      entityType: "pets.vaccination",
      entityId: row.id,
      dueOn: row.dueOn,
      createdBy: scope.userId,
      title: `Vaccination due: ${pet.name}`,
      body: row.name,
    });
  return row;
}
export async function updateVaccinationForScope(
  scope: Scope,
  input: { id: string } & z.input<typeof vaccinationUpdateInput>,
) {
  const parsed = idInput.and(vaccinationUpdateInput).parse(input);
  const row = await requireVaccination(scope, parsed.id);
  const pet = await requirePet(scope, row.petId);
  const { id, ...changes } = parsed;
  const [updated] = await db
    .update(petVaccinations)
    .set({ ...changes, updatedAt: new Date() })
    .where(eq(petVaccinations.id, id))
    .returning();
  if (!updated) throw new Error("Vaccination not found");
  if (scope.userId)
    await syncPetDueDateReminder({
      householdId: scope.householdId,
      entityType: "pets.vaccination",
      entityId: id,
      dueOn: updated.dueOn,
      createdBy: scope.userId,
      title: `Vaccination due: ${pet.name}`,
      body: updated.name,
    });
  return updated;
}
export async function deleteVaccinationForScope(scope: Scope, input: { id: string }) {
  const { id } = idInput.parse(input);
  await requireVaccination(scope, id);
  await cancelReminder("pets.vaccination", id);
  await db.delete(petVaccinations).where(eq(petVaccinations.id, id));
}

export async function createVaccination(input: z.input<typeof vaccinationInput>) {
  const { household, user } = await getCurrentSession();
  const row = await createVaccinationForScope(
    { householdId: household.id, userId: user.id },
    input,
  );
  revalidatePet(row.petId);
  return row;
}
export async function deleteVaccination(input: { id: string }) {
  const { household, user } = await getCurrentSession();
  const row = await requireVaccination({ householdId: household.id, userId: user.id }, input.id);
  await deleteVaccinationForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePet(row.petId);
}

export async function createPrescriptionForScope(
  scope: Scope,
  input: z.input<typeof prescriptionInput>,
) {
  const parsed = prescriptionInput.parse(input);
  const pet = await requirePet(scope, parsed.petId);
  const [row] = await db
    .insert(petPrescriptions)
    .values({
      householdId: scope.householdId,
      ...parsed,
      instructions: parsed.instructions ?? null,
      prescribedOn: parsed.prescribedOn ?? null,
      expiresOn: parsed.expiresOn ?? null,
      refillsRemaining: parsed.refillsRemaining ?? null,
    })
    .returning();
  if (!row) throw new Error("Prescription was not created");
  if (scope.userId)
    await syncPetDueDateReminder({
      householdId: scope.householdId,
      entityType: "pets.prescription",
      entityId: row.id,
      dueOn: row.active ? row.expiresOn : null,
      createdBy: scope.userId,
      title: `Prescription due: ${pet.name}`,
      body: row.medication,
    });
  return row;
}
export async function updatePrescriptionForScope(
  scope: Scope,
  input: { id: string } & z.input<typeof prescriptionUpdateInput>,
) {
  const parsed = idInput.and(prescriptionUpdateInput).parse(input);
  const row = await requirePrescription(scope, parsed.id);
  const pet = await requirePet(scope, row.petId);
  const { id, ...changes } = parsed;
  const [updated] = await db
    .update(petPrescriptions)
    .set({ ...changes, updatedAt: new Date() })
    .where(eq(petPrescriptions.id, id))
    .returning();
  if (!updated) throw new Error("Prescription not found");
  if (scope.userId)
    await syncPetDueDateReminder({
      householdId: scope.householdId,
      entityType: "pets.prescription",
      entityId: id,
      dueOn: updated.active ? updated.expiresOn : null,
      createdBy: scope.userId,
      title: `Prescription due: ${pet.name}`,
      body: updated.medication,
    });
  return updated;
}
export async function deletePrescriptionForScope(scope: Scope, input: { id: string }) {
  const { id } = idInput.parse(input);
  await requirePrescription(scope, id);
  await cancelReminder("pets.prescription", id);
  await db.delete(petPrescriptions).where(eq(petPrescriptions.id, id));
}

export async function createPrescription(input: z.input<typeof prescriptionInput>) {
  const { household, user } = await getCurrentSession();
  const row = await createPrescriptionForScope(
    { householdId: household.id, userId: user.id },
    input,
  );
  revalidatePet(row.petId);
  return row;
}
export async function deletePrescription(input: { id: string }) {
  const { household, user } = await getCurrentSession();
  const row = await requirePrescription({ householdId: household.id, userId: user.id }, input.id);
  await deletePrescriptionForScope({ householdId: household.id, userId: user.id }, input);
  revalidatePet(row.petId);
}