#!/usr/bin/env node

import { stdout, stderr } from "node:process";
import { input, password } from "@inquirer/prompts";
import { Command, Option } from "commander";
import envPaths from "env-paths";
import { logLevel, logRequests, stderrLog, type Log } from "../src/cli-log.js";
import { init } from "../src/crypto/index.js";
import {
    type CliContext,
    loginCommand,
    whoamiCommand,
    logoutCommand,
    collectionsCommand,
    filesCommand,
    getCommand,
    getThumbCommand,
    backupMetadataCommand,
    backupCommand,
    listMissingThumbnailsCommand,
    fixMissingThumbnailsCommand,
} from "../src/cli-commands.js";
import { run as runCommand } from "../src/cli-run.js";
import { loadSession } from "../src/cli-session.js";
import { Client } from "../src/client.js";
import { VERSION } from "../src/index.js";
import { UNATTENDED_RETRY_OPTIONS } from "../src/retry.js";

const paths = envPaths("quak", { suffix: "" });

const program = new Command();

// Program options, so they are taken before or after any command's name.
// `-v` counts its repeats, the way commander's documentation counts a repeated
// option.
program
    .name("quak")
    .description("CLI for the Ente end-to-end encrypted photo service")
    .version(VERSION)
    .option(
        "--cache-dir <path>",
        "Directory for the local metadata/content cache " +
            "(default: the per-user cache directory)",
    )
    .option(
        "-v, --verbose",
        "Log more on stderr: debug lines with -v, trace lines too with -vv",
        (_value: string, previous: number) => previous + 1,
        0,
    )
    .addOption(
        new Option(
            "-q, --quiet",
            "Print nothing on stderr but the error a failing command exits with",
        ).conflicts("verbose"),
    )
    .configureHelp({ showGlobalOptions: true });

interface ProgramOptions {
    cacheDir?: string;
    verbose: number;
    quiet?: boolean;
}

// The log for this run, at the level `-v` and `-q` ask for.
const log = (): Log => {
    const { verbose, quiet } = program.opts<ProgramOptions>();
    return stderrLog(stderr, logLevel(verbose, quiet ?? false));
};

const context = (): CliContext => ({
    stdout,
    log: log(),
    sessionDir: paths.data,
    cacheDir: program.opts<ProgramOptions>().cacheDir,
    loadSession: (path) => loadSession(path, logRequests(log())),
    login: (opts) => Client.login({ ...opts, apiOptions: logRequests(log()) }),
    prompt: (message) => input({ message }),
    promptSecret: (message) => password({ message, mask: true }),
});

const run = (command: Promise<number>): Promise<void> =>
    runCommand(command, stdout, stderr, log(), (code) => process.exit(code));

program
    .command("login")
    .description("Log in to an Ente account and save the session")
    .action(() => run(loginCommand(context())));

program
    .command("whoami")
    .description("Print the logged-in account")
    .action(() => run(whoamiCommand(context())));

program
    .command("logout")
    .description("End the session on the server and delete the saved session")
    .action(() => run(logoutCommand(context())));

program
    .command("collections")
    .description("List all collections (albums)")
    .option("--json", "Output as JSON array")
    .action((opts: { json?: boolean }) =>
        run(collectionsCommand(context(), opts)),
    );

program
    .command("files")
    .description("List the files in a collection, or every file in the account")
    .argument(
        "[collectionID]",
        "Collection ID (from `quak collections`); without it, every file " +
            "is listed once",
    )
    .option("--json", "Output as JSON array")
    .action((collectionID: string | undefined, opts: { json?: boolean }) =>
        run(filesCommand(context(), collectionID, opts)),
    );

program
    .command("get")
    .description("Download and decrypt a single file")
    .argument("<fileID>", "File ID (from `quak files`)")
    .option("--out <path>", "Output file path")
    .option("--collection <id>", "Accepted for compatibility; ignored")
    .action((fileID: string, opts: { out?: string }) =>
        run(getCommand(context(), fileID, opts)),
    );

program
    .command("get-thumb")
    .description("Download and decrypt a thumbnail")
    .argument("<fileID>", "File ID (from `quak files`)")
    .option("--out <path>", "Output file path")
    .option("--collection <id>", "Accepted for compatibility; ignored")
    .action((fileID: string, opts: { out?: string }) =>
        run(getThumbCommand(context(), fileID, opts)),
    );

program
    .command("backup-metadata")
    .description(
        "Dump all decrypted account metadata to a directory of JSON files",
    )
    .argument("<dir>", "Output directory")
    .option(
        "--exif",
        "Download each file and extract full EXIF/IPTC/XMP metadata (slow)",
    )
    .option("--all", "Alias for --exif")
    .action((dir: string, opts: { exif?: boolean; all?: boolean }) =>
        run(backupMetadataCommand(context(), dir, opts)),
    );

program
    .command("backup")
    .description(
        "Download all photos to a local directory, organized by collection",
    )
    .argument("<dir>", "Output directory")
    .option("--json", "Print result as JSON instead of human-readable summary")
    .option(
        "--verify",
        "Re-hash stored originals and download again any that do not match",
    )
    // A backup usually runs from cron with nobody watching, so every request
    // it makes retries for longer than the other commands' requests do.
    .action((dir: string, opts: { json?: boolean; verify?: boolean }) =>
        run(
            backupCommand(
                {
                    ...context(),
                    loadSession: (path) =>
                        loadSession(
                            path,
                            logRequests(log(), UNATTENDED_RETRY_OPTIONS),
                        ),
                },
                dir,
                opts,
            ),
        ),
    );

const helper = program
    .command("helper")
    .description("Maintenance and repair utilities");

helper
    .command("list-missing-thumbnails")
    .description("List files whose thumbnails are missing or empty")
    .option("--json", "Output as JSON array")
    .action((opts: { json?: boolean }) =>
        run(listMissingThumbnailsCommand(context(), opts)),
    );

helper
    .command("fix-missing-thumbnails")
    .description(
        "Generate and upload thumbnails for files that are missing them",
    )
    .option(
        "--file <ids...>",
        "Specific file IDs to fix (default: fix all missing)",
    )
    .option("--json", "Output as JSON")
    .action((opts: { file?: string[]; json?: boolean }) =>
        run(fixMissingThumbnailsCommand(context(), opts)),
    );

await init();
await program.parseAsync();