import { syscall } from "../syscall.ts";

import type {
  DocumentMeta,
  FileMeta,
  PageMeta,
} from "../../plug-api/types/index.ts";
import type { Ref } from "@silverbulletmd/silverbullet/lib/ref";

/**
 * Exposes the space with its pages, documents and plugs.
 * @module
 */

/**
 * Lists all pages (files ending in .md) in the space.
 * @param unfiltered
 * @returns a list of all pages in the space represented as PageMeta objects
 */
export function listPages(): Promise<PageMeta[]> {
  return syscall("space.listPages");
}

/**
 * Get metadata for a page in the space.
 * @param name the name of the page to get metadata for
 * @returns the metadata for the page
 */
export function getPageMeta(name: string): Promise<PageMeta> {
  return syscall("space.getPageMeta", name);
}

/**
 * Check if a page exists in the space.
 * @param name the name of the page to check
 * @returns true if the page exists, false otherwise
 */
export function pageExists(name: string): Promise<boolean> {
  return syscall("space.pageExists", name);
}

/**
 * Read a page from the space as text.
 * @param name the name of the page to read
 * @returns the text of the page
 */
export function readPage(name: string): Promise<string> {
  return syscall("space.readPage", name);
}

/**
 * Read a page from the space returning both its text and meta data
 * @param name the name of the page to read
 * @returns
 *  - text: page text as a string
 *  - meta: pageMeta
 */
export function readPageWithMeta(
  name: string,
): Promise<{ text: string; meta: PageMeta }> {
  return syscall("space.readPageWithMeta", name);
}

/**
 * Write a page to the space.
 * @param name the name of the page to write
 * @param text the text of the page to write
 * @returns the metadata for the written page
 */
export function writePage(name: string, text: string): Promise<PageMeta> {
  return syscall("space.writePage", name, text);
}

/**
 * Delete a page from the space.
 * @param name the name of the page to delete
 */
export function deletePage(name: string): Promise<void> {
  return syscall("space.deletePage", name);
}

/**
 * List all plugs in the space.
 * @returns a list of all plugs in the space represented as FileMeta objects
 */
export function listPlugs(): Promise<FileMeta[]> {
  return syscall("space.listPlugs");
}

/**
 * Lists all documents in the space (all files not ending in .md).
 * @returns a list of all documents in the space represented as DocumentMeta objects
 */
export function listDocuments(): Promise<DocumentMeta[]> {
  return syscall("space.listDocuments");
}

/**
 * Get metadata for an document in the space.
 * @param name the path of the document to get metadata for
 * @returns the metadata for the document
 */
export function getDocumentMeta(name: string): Promise<DocumentMeta> {
  return syscall("space.getDocumentMeta", name);
}

/**
 * Read an document from the space
 * @param name path of the document to read
 * @returns the document data as a UInt8Array
 */
export function readDocument(name: string): Promise<Uint8Array> {
  return syscall("space.readDocument", name);
}

/**
 * Writes a document to the space
 * @param name path of the document to write
 * @param data data itself
 * @returns
 */
export function writeDocument(
  name: string,
  data: Uint8Array,
): Promise<DocumentMeta> {
  return syscall("space.writeDocument", name, data);
}

/**
 * Deletes a document from the space
 * @param name path of the document to delete
 */
export function deleteDocument(name: string): Promise<void> {
  return syscall("space.deleteDocument", name);
}

// Lower level-file operations

/**
 * List all files in the space (pages, documents and plugs).
 * @returns a list of all files in the space represented as FileMeta objects
 */
export function listFiles(): Promise<FileMeta[]> {
  return syscall("space.listFiles");
}

/**
 * Read a file from the space as a Uint8Array.
 * @param name the name of the file to read
 * @returns the data of the file
 */
export function readFile(name: string): Promise<Uint8Array> {
  return syscall("space.readFile", name);
}

/**
 * Reads a reference (e.g. page#header or page@20) and returns it as a string
 */
export function readRef(ref: string | Ref): Promise<string> {
  return syscall("space.readRef", ref);
}

/**
 * Read a file from the space returning both its data and meta data
 * @param name the name of the page to read
 * @returns
 *  - data: file content
 *  - meta: pageMeta
 */
export function readFileWithMeta(
  name: string,
): Promise<{ data: Uint8Array; meta: FileMeta }> {
  return syscall("space.readFileWithMeta", name);
}

/**
 * Get metadata for a file in the space.
 * @param name the name of the file to get metadata for
 * @returns the metadata for the file
 */
export function getFileMeta(name: string): Promise<FileMeta> {
  return syscall("space.getFileMeta", name);
}

/**
 * Write a file to the space.
 * @param name the name of the file to write
 * @param data the data of the file to write
 * @returns the metadata for the written file
 */
export function writeFile(name: string, data: Uint8Array): Promise<FileMeta> {
  return syscall("space.writeFile", name, data);
}

/**
 * Delete a file from the space.
 * @param name the name of the file to delete
 */
export function deleteFile(name: string): Promise<void> {
  return syscall("space.deleteFile", name);
}

export function fileExists(name: string): Promise<boolean> {
  return syscall("space.fileExists", name);
}