import { formscreen } from "./formscreen.js";
import { create_request } from "./create_request.js";
import { bool_response } from "./bool_response.js";
import { product_base } from "./product_base.js";
import { searcher } from "./searcher.js";

export class product_adder extends formscreen {
    #name;
    #description;
    #author;
    #barcode;
    #stock_count;
    #image;

    get _name() {
        return "Add product";
    }

    _build_form() {
        this.#name = this._create_input(
            "name", 
            "Name:", 
            "Sample..."
        );

        this.#description = this._create_input(
            "description",
            "Description:",
            "This is sample product..."
        );

        this.#author = this._create_input(
            "author",
            "Author:",
            "Jack Black"
        );

        this.#barcode = this._create_input(
            "barcode",
            "Barcode (EAN):",
            "123456789012...",
            (input) => { input.type = "number"; }
        );

        this.#stock_count = this._create_input(
            "stock_count",
            "Stock count:",
            "10...",
            (input) => { input.type = "number"; }
        );

        this._create_input(
            "image",
            "Product image:",
            "",
            (input) => {
                this.#image = input;
                input.type = "file";
                input.accept = "image/*";
            }
        );
    }

    async #code_image() {
        if (this.#image.files.length === 0) {
            throw new Error("Upload image for product.");
        }

        const file = this.#image.files.item(0);
        const buffer = await file.arrayBuffer();
        const list = new Uint8Array(buffer);
        
        let content = new String();

        list.forEach((code) => {
            content += String.fromCharCode(code);
        });

        return btoa(content);
    }   

    async #submit() {
        const product = new product_base();
        product.name = this.#name();
        product.description = this.#description();
        product.author = this.#author();
        product.stock_count = this.#stock_count();
        product.barcode = this.#barcode();

        const image = await this.#code_image();

        const request = new create_request(product, image);
        const response = await request.connect();

        if (!response.result) {
            throw new Error(response.cause);
        }
    }

    async _process() {
        try {
            this._info = "Uploading...";
            await this.#submit();
            this._success = "Created success!";
        
            searcher.reload();

            setTimeout(() => {
                this.hide();
            }, 500);
        } catch (error) {
            this._error = new String(error);
        }
    }
}