// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT

/**
 * Read and write to the system clipboard.
 *
 * @module
 */

import { invoke } from "@tauri-apps/api/core";
import { Image, transformImage } from "@tauri-apps/api/image";

type ClipResponse = Record<"plainText", { text: string }>;

/**
 * Writes plain text to the clipboard.
 * @example
 * ```typescript
 * import { writeText, readText } from '@tauri-apps/plugin-clipboard-manager';
 * await writeText('Tauri is awesome!');
 * assert(await readText(), 'Tauri is awesome!');
 * ```
 *
 * @returns A promise indicating the success or failure of the operation.
 *
 * @since 2.0.0
 */
async function writeText(
  text: string,
  opts?: { label?: string },
): Promise<void> {
  await invoke("plugin:clipboard-manager|write_text", {
    data: {
      plainText: {
        label: opts?.label,
        text,
      },
    },
  });
}

/**
 * Gets the clipboard content as plain text.
 * @example
 * ```typescript
 * import { readText } from '@tauri-apps/plugin-clipboard-manager';
 * const clipboardText = await readText();
 * ```
 * @since 2.0.0
 */
async function readText(): Promise<string> {
  const kind: ClipResponse = await invoke("plugin:clipboard-manager|read_text");
  return kind.plainText.text;
}

/**
 * Gets the clipboard content as Uint8Array image.
 * @example
 * ```typescript
 * import { readImage } from '@tauri-apps/plugin-clipboard-manager';
 *
 * const clipboardImage = await readImage();
 * const blob = new Blob([clipboardImage.bytes], { type: 'image' })
 * const url = URL.createObjectURL(blob)
 * ```
 * @since 2.0.0
 */
async function readImage(): Promise<Image> {
  return await invoke<number>("plugin:clipboard-manager|read_image").then(
    (rid) => new Image(rid),
  );
}

/**
 * Writes image buffer to the clipboard.
 * @example
 * ```typescript
 * import { writeImage } from '@tauri-apps/plugin-clipboard-manager';
 * const buffer = [
 *   // A red pixel
 *   255, 0, 0, 255,
 *
 *  // A green pixel
 *   0, 255, 0, 255,
 * ];
 * await writeImage(buffer);
 *
 * @returns A promise indicating the success or failure of the operation.
 *
 * @since 2.0.0
 */
async function writeImage(
  image: string | Image | Uint8Array | ArrayBuffer | number[],
): Promise<void> {
  await invoke("plugin:clipboard-manager|write_image", {
    data: {
      image: {
        image: transformImage(image),
      },
    },
  });
}

/**
 * * Writes HTML or fallbacks to write provided plain text to the clipboard.
 * @example
 * ```typescript
 * import { writeHtml, readHtml } from '@tauri-apps/plugin-clipboard-manager';
 * await writeHtml('<h1>Tauri is awesome!</h1>', 'plaintext');
 * await writeHtml('<h1>Tauri is awesome!</h1>', '<h1>Tauri is awesome</h1>'); // Will write "<h1>Tauri is awesome</h1>" as plain text
 * assert(await readText(), '<h1>Tauri is awesome!</h1>');
 * ```
 *
 * @returns A promise indicating the success or failure of the operation.
 *
 * @since 2.0.0
 */
async function writeHtml(html: string, altHtml?: string): Promise<void> {
  await invoke("plugin:clipboard-manager|write_html", {
    data: {
      html: {
        html,
        altHtml,
      },
    },
  });
}

/**
 * Clears the clipboard.
 * @example
 * ```typescript
 * import { clear } from '@tauri-apps/plugin-clipboard-manager';
 * await clear();
 * ```
 * @since 2.0.0
 */
async function clear(): Promise<void> {
  await invoke("plugin:clipboard-manager|clear");
}

export { writeText, readText, writeHtml, clear, readImage, writeImage };