"use server";

import { revalidatePath } from "next/cache";
import { z } from "zod";
import { tr } from "@/i18n/tr";
import { fail, type ActionResult } from "@/lib/action-result";
import { getHouseholdActionContext } from "@/lib/dal";
import {
  shoppingCompletionSchema,
  shoppingItemFormSchema,
  shoppingItemUpdateSchema,
  shoppingListFormSchema,
} from "@/shared/schemas/shopping";
import { completeShopping } from "./completion";
import {
  addShoppingItem,
  approveSuggestions,
  createShoppingList,
  deleteShoppingList,
  dismissSuggestion,
  moveShoppingItem,
  removeShoppingItem,
  setShoppingItemChecked,
  updateShoppingItem,
  updateShoppingList,
} from "./service";

const idSchema = z.string().regex(/^[a-f0-9]{24}$/i);

function fieldErrors(error: z.ZodError) {
  const out: Record<string, string> = {};
  for (const issue of error.issues) {
    const key = issue.path.join(".");
    if (key && !out[key]) out[key] = issue.message;
  }
  return out;
}

async function run<T, R>(
  schema: z.ZodType<T>,
  input: unknown,
  fn: (userId: string, householdId: string, data: T) => Promise<ActionResult<R>>,
): Promise<ActionResult<R>> {
  const ctx = await getHouseholdActionContext("member");
  if (!ctx) return fail(tr.common.unauthorized);
  const parsed = schema.safeParse(input);
  if (!parsed.success) return fail(tr.adminUsers.errors.checkFields, fieldErrors(parsed.error));
  const result = await fn(ctx.user.id, ctx.household.id, parsed.data);
  if (result.ok) revalidatePath("/", "layout");
  return result;
}

const ids = (...keys: string[]) => z.object(Object.fromEntries(keys.map((k) => [k, idSchema])));

export async function saveShoppingListAction(listId: string | null, input: unknown) {
  if (listId === null)
    return run(shoppingListFormSchema, input, (u, h, d) => createShoppingList(u, h, d));
  const id = idSchema.safeParse(listId);
  if (!id.success) return fail(tr.common.notFound);
  return run(shoppingListFormSchema, input, (u, h, d) => updateShoppingList(u, h, id.data, d));
}

export async function deleteShoppingListAction(listId: unknown) {
  const id = idSchema.safeParse(listId);
  if (!id.success) return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) => deleteShoppingList(u, h, id.data));
}

export async function addShoppingItemAction(listId: unknown, input: unknown) {
  const id = idSchema.safeParse(listId);
  if (!id.success) return fail(tr.common.notFound);
  return run(shoppingItemFormSchema, input, (u, h, d) => addShoppingItem(u, h, id.data, d));
}

export async function updateShoppingItemAction(listId: unknown, itemId: unknown, input: unknown) {
  const ref = ids("listId", "itemId").safeParse({ listId, itemId });
  if (!ref.success) return fail(tr.common.notFound);
  return run(shoppingItemUpdateSchema, input, (u, h, d) =>
    updateShoppingItem(u, h, ref.data.listId!, ref.data.itemId!, d),
  );
}

export async function removeShoppingItemAction(listId: unknown, itemId: unknown) {
  const ref = ids("listId", "itemId").safeParse({ listId, itemId });
  if (!ref.success) return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) =>
    removeShoppingItem(u, h, ref.data.listId!, ref.data.itemId!),
  );
}

export async function setShoppingItemCheckedAction(
  listId: unknown,
  itemId: unknown,
  checked: unknown,
) {
  const ref = ids("listId", "itemId").safeParse({ listId, itemId });
  if (!ref.success || typeof checked !== "boolean") return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) =>
    setShoppingItemChecked(u, h, ref.data.listId!, ref.data.itemId!, checked),
  );
}

export async function moveShoppingItemAction(listId: unknown, itemId: unknown, target: unknown) {
  const ref = ids("listId", "itemId", "target").safeParse({ listId, itemId, target });
  if (!ref.success) return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) =>
    moveShoppingItem(u, h, ref.data.listId!, ref.data.itemId!, ref.data.target!),
  );
}

export async function approveSuggestionsAction(listId: unknown, productTypeIds: unknown) {
  const id = idSchema.safeParse(listId);
  const types = z.array(idSchema).min(1).max(200).safeParse(productTypeIds);
  if (!id.success || !types.success) return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) => approveSuggestions(u, h, id.data, types.data));
}

export async function dismissSuggestionAction(productTypeId: unknown) {
  const id = idSchema.safeParse(productTypeId);
  if (!id.success) return fail(tr.common.notFound);
  return run(z.unknown(), null, (u, h) => dismissSuggestion(u, h, id.data));
}

export async function completeShoppingAction(listId: unknown, input: unknown) {
  const id = idSchema.safeParse(listId);
  if (!id.success) return fail(tr.common.notFound);
  return run(shoppingCompletionSchema, input, (u, h, d) => completeShopping(u, h, id.data, d));
}