import { fail } from "@sveltejs/kit";
import type { Actions, PageServerLoad } from "./$types";
import type { StackqItem } from "$lib/types/items";
import { parseBool, parseNum } from "$lib/parse-form";
import { validateImageUpload } from "$lib/validate-image-upload";

const COLLECTION = "Stackq_Items";

export const load: PageServerLoad = async ({ locals }) => {
  const list = await locals.pb
    .collection(COLLECTION)
    .getFullList<StackqItem>({
      sort: "-created",
      expand: "Parent",
    })
    .catch((err) => {
      console.error(COLLECTION, err);
      return [] as StackqItem[];
    });

  const itemsForParent = list.map((i) => ({ id: i.id, Item: i.Item, SKU: i.SKU }));

  return { items: list, itemsForParent };
};

export const actions: Actions = {
  create: async ({ request, locals }) => {
    const form = await request.formData();
    const Item = (form.get("Item") as string)?.trim() ?? "";
    const SKU = (form.get("SKU") as string)?.trim() ?? "";
    const Description = (form.get("Description") as string)?.trim() ?? "";
    const UOM = (form.get("UOM") as string)?.trim() ?? "";
    const Cost = parseNum(form.get("Cost"));
    const Vendor = (form.get("Vendor") as string)?.trim() ?? "";
    const Catagory = (form.get("Catagory") as string)?.trim() ?? "";
    const Sub_Catagory = (form.get("Sub_Catagory") as string)?.trim() ?? "";
    const Has_Parent = parseBool(form.get("Has_Parent"));
    const Parent = (form.get("Parent") as string)?.trim() ?? "";
    const Stock = parseBool(form.get("Stock"));
    const imageFileCreate = form.get("Image") as File | null;
    const hasImage = imageFileCreate && imageFileCreate.size > 0;
    if (hasImage) {
      const imgError = validateImageUpload(imageFileCreate);
      if (imgError) return fail(400, { error: imgError, form: "create" });
    }

    if (!Item) return fail(400, { error: "Item name is required", form: "create" });

    try {
      const body: Record<string, unknown> = {
        Item,
        SKU,
        Description,
        UOM: UOM || undefined,
        Cost: Cost ?? 0,
        Vendor,
        Catagory: Catagory || undefined,
        Sub_Catagory: Sub_Catagory || undefined,
        Has_Parent: !!Has_Parent,
        Parent: Parent || null,
        Stock: !!Stock,
      };
      if (hasImage) body.Image = imageFileCreate;
      await locals.pb.collection(COLLECTION).create(body);
    } catch (e: unknown) {
      const message = e && typeof e === "object" && "message" in e ? String((e as { message: string }).message) : "Create failed";
      return fail(500, { error: message, form: "create" });
    }
    return { success: true };
  },

  update: async ({ request, locals }) => {
    const form = await request.formData();
    const id = (form.get("id") as string)?.trim();
    if (!id) return fail(400, { error: "Missing id", form: "update" });

    const Item = (form.get("Item") as string)?.trim() ?? "";
    const SKU = (form.get("SKU") as string)?.trim() ?? "";
    const Description = (form.get("Description") as string)?.trim() ?? "";
    const UOM = (form.get("UOM") as string)?.trim() ?? "";
    const Cost = parseNum(form.get("Cost"));
    const Vendor = (form.get("Vendor") as string)?.trim() ?? "";
    const Catagory = (form.get("Catagory") as string)?.trim() ?? "";
    const Sub_Catagory = (form.get("Sub_Catagory") as string)?.trim() ?? "";
    const Has_Parent = parseBool(form.get("Has_Parent"));
    const Parent = (form.get("Parent") as string)?.trim() ?? "";
    const Stock = parseBool(form.get("Stock"));
    const Image = form.get("Image") as File | null;
    const imageFile = Image && Image.size > 0 ? Image : undefined;
    if (imageFile) {
      const imgError = validateImageUpload(imageFile);
      if (imgError) return fail(400, { error: imgError, form: "update" });
    }

    if (!Item) return fail(400, { error: "Item name is required", form: "update" });

    try {
      const body: Record<string, unknown> = {
        Item,
        SKU,
        Description,
        UOM: UOM || undefined,
        Cost: Cost ?? 0,
        Vendor,
        Catagory: Catagory || undefined,
        Sub_Catagory: Sub_Catagory || undefined,
        Has_Parent: !!Has_Parent,
        Parent: Parent || null,
        Stock: !!Stock,
      };
      if (imageFile) body.Image = imageFile;
      await locals.pb.collection(COLLECTION).update(id, body);
    } catch (e: unknown) {
      const message = e && typeof e === "object" && "message" in e ? String((e as { message: string }).message) : "Update failed";
      return fail(500, { error: message, form: "update" });
    }
    return { success: true };
  },

  delete: async ({ request, locals }) => {
    const form = await request.formData();
    const id = (form.get("id") as string)?.trim();
    if (!id) return fail(400, { error: "Missing id", form: "delete" });
    try {
      await locals.pb.collection(COLLECTION).delete(id);
    } catch (e: unknown) {
      const message = e && typeof e === "object" && "message" in e ? String((e as { message: string }).message) : "Delete failed";
      return fail(500, { error: message, form: "delete" });
    }
    return { success: true };
  },
};