import "./DownloadButton.css";
import type { MediaFile, Directory } from "music-server-shared/types";
import { deleteFile, download, getDownloadStatus } from "../offline";
import { createMemo, type Accessor, type ResourceActions } from "solid-js";
import type { AppOptions } from "../types";
import { formatBytes, joinPath } from "../utils";
import { DeleteSVG, RefreshSVG, SyncSVG } from "./SVG";
import { LoadingSpinner } from "./LoadingScreen";
import type { FlatFileListing } from "../App";

interface DownloadButtonProps {
	fileName: string;
	item: MediaFile | Directory;
	fetchFiles: ResourceActions<FlatFileListing>;
	isOffline: Accessor<boolean>;
	currentDir: Accessor<string>;
	options: AppOptions;
}

export function DownloadButton(props: DownloadButtonProps) {
	const fullPath = joinPath(props.currentDir(), props.fileName);

	return (
		<div
			class="download-item"
			onClick={(event) => {
				event.stopPropagation();
				if (!props.isOffline())
					download(props.fileName, props.item, props.currentDir(), props.currentDir, props.options, props.fetchFiles);
				else deleteFile(props.fileName, props.item, props.currentDir(), props.fetchFiles);
			}}
		>
			{(() => {
				//memo needed so progress amount doesn't cause rerenders
				type ButtonType = "Spinner" | "Delete" | "Sync" | "Refresh" | { bytes: number };
				const progressMemo = createMemo<ButtonType>(() => {
					const progress = getDownloadStatus(fullPath)[0]();
					if (typeof progress === "object" && "amount" in progress) return "Spinner";
					if (props.isOffline()) return "Delete";
					if (progress === undefined) return "Sync";
					if (progress === "Synced") return "Refresh";
					if ("bytes" in progress) return { bytes: progress.bytes };
					throw new Error(`Unexpected: ${progress}`);
				});
				const progress = progressMemo();
				if (progress === "Spinner") return <LoadingSpinner center={true} />;
				if (progress === "Delete") {
					return (
						<button title="Purge this file/these files from local sync storage">
							<DeleteSVG />
						</button>
					);
				}
				if (progress === "Sync") {
					return (
						<button title="Sync this file/directory to your browser for offline use">
							<SyncSVG />
						</button>
					);
				}
				if (progress === "Refresh") {
					return (
						<button title="Re-sync this file">
							<RefreshSVG />
						</button>
					);
				}
				if ("bytes" in progress) return <span>{progress.bytes === 0 ? "Queued..." : formatBytes(progress.bytes)}</span>;
				console.error("Unexpected", progress);
			})()}
		</div>
	);
}