#! /usr/bin/env runjs

var argsjs = require('component-args.js');
var RFile = Packages.me.hatter.tools.commons.io.RFile;

var main = () => {
    var parsedArgs = argsjs.parseDefARGs([]);

    var actions = ['desc', 'show', 'cat', 'edit', 'create'];
    var matchAction = (parsedArgs.length == 0)? []: actions.filter((a) => { return a.startsWith(parsedArgs[0]) });
    if (matchAction == 0) {
        println('No or error args, usage:');
        println('  enc [-k KEY_ID] desc|show|cat|edit|create');
        return;
    }

    if (matchAction.length > 1) {
        println('Match more than one action: ' + JSON.stringify(matchAction));
        return;
    }
    parsedArgs[0] = matchAction[0];

    if (parsedArgs[0] == 'desc') {
        if (parsedArgs.length == 1) {
            println('File name is not assigned.');
            return;
        }
        $$.shell().commands('pgpdump', parsedArgs[1]).inheritIO().run();
        return;
    }

    var userDir = $$.prop('user.dir');
    var pgpKeyId = parsedArgs.val('k');

    if (pgpKeyId == null) {
        var encJSConf = $$.file($$.prop('user.home'), '.enc.js.conf');
        if (!encJSConf.exists()) {
            println('Config file ~/.enc.js.conf not found.');
            return;
        }
        var pgpKeyId = RFile.from(encJSConf).string().trim();
        if (pgpKeyId.length == 0) {
            println('PGP key id is empty.');
            return;
        }
    }

    if (parsedArgs[0] == 'create') {
        var fname;
        if (parsedArgs.length > 1) {
            fname = parsedArgs[1];
        } else {
            print('Please input filename: ');
            fname = java.lang.System.console().readLine();
        }
        if (fname.length == 0) {
            println('File name is not inputed.');
            return;
        }
        var fn = fname.replace(/[^a-zA-Z0-9_.]/g, '_');
        if ($$.file(userDir, fn).exists()) {
            println('File exists: ' + fn);
            return;
        }
        if ($$.file(userDir, fn + '.asc').exists()) {
            println('File exists: ' + fn + '.asc');
            return;
        }

        requireJS('component-swing.js');

        var txt = showWindow('Create - ' + fn, '', 'Input message:', true).get();
        if (txt == null) {
            println('Message is not inputed.');
            return;
        }

        RFile.from($$.file(userDir, fn)).write(txt);
        $$.shell().commands('sh', '-c', 'gpg -r ' + pgpKeyId + ' -e -a --no-comment --comment "https://hatter.in/key" ' + fn).start();
        if ($$.file(userDir, fn + '.asc').exists()) {
            $$.file(userDir, fn).delete();
            println('CREATE SUCCESS.');
        }

        return;
    }

    var userDirFile = $$.file(userDir);
    var encFiles = $ARRAY(userDirFile.list()).filter((f) => { return (f.endsWith('.gpg') || f.endsWith('.asc')); });
    if (encFiles.length == 0) {
        println('Can NOT find any .gpg or .asc file.');
        return;
    }
    var argFilterEncFiles = parsedArgs.length > 1? encFiles.filter((f) => { return f == parsedArgs[1]; }): [];
    var selectFile = (argFilterEncFiles.length > 0)? argFilterEncFiles[0]: null;
    if (selectFile == null && encFiles.length > 1) {
        println('Please select one file:');
        encFiles.forEach((f, i) => {
            println('  ' + i + ': ' + f);
        });
        print('Input a number 0-' + (encFiles.length - 1) + ': ');
        var ln = java.lang.System.console().readLine();
        var idx = 0;
        try {
            idx = java.lang.Integer.parseInt(ln);
            if ((idx < 0) || (idx >= encFiles.length)) {
                println("Index range error: " + idx);
                return;
            }

            selectFile = encFiles[idx];
        } catch (e) {
            println('Parse error: ' + (e.getMessage == null)? e: e.getMessage());
            return;
        }
    }
    if ((selectFile == null) && (encFiles.length == 1)) {
        selectFile = encFiles[0];
    }
    if (selectFile == null) {
        println('File is not selected.');
        return;
    }
    
    var result = $$.shell().commands('sh', '-c', 'cat ' + selectFile + ' | gpg').start();
    var out = result[0].string();
    var err = result[1].string();
    if (err.contains('public key decryption failed')) {
        println('+ Decrypt file FAILED: ' + selectFile);
        if (!Packages.me.hatter.tools.jssp.main.StandaloneMain.JSSP_MAIN_MUTE) {
            println("ERROR detail:\n" + err);
        }
        return;
    }

    if (parsedArgs[0] == 'cat') {
        println('Enc message: ' + selectFile);
        println(repeat('-', 80));
        println(out);
        println(repeat('-', 80));
        return;
    }

    var listOnlyKeyIdOut = $$.shell().commands('gpg', '--list-only', '--list-packets', selectFile).start()[1];
    var keyIds = $STR(listOnlyKeyIdOut).split('\n')
                 .filter((x) => { return x.contains('ID '); })
                 .map((x) => { return x.replace(/.*ID\s+([0-9a-fA-F]+)[,\s]+.*/, '$1'); });
    println('Encrypted key ids: [' + keyIds.join(', ') + ']');

    requireJS('component-swing.js');

    var actFLUC = parsedArgs[0].substring(0, 1).toUpperCase() + parsedArgs[0].substring(1);
    var txt = showWindow(actFLUC + ' - ' + selectFile, out, actFLUC + ' encrypted message:', parsedArgs[0] == 'edit').get();

    if (txt != null) {
        // backup
        $$.file(userDir, selectFile).renameTo($$.file(userDir, selectFile + '.back'));
        // write text
        var txtFile = selectFile.substring(0, selectFile.length - 4)
        RFile.from($$.file(userDir, txtFile)).write(txt);

        $$.shell().commands('sh', '-c', 'gpg ' + keyIds.map((x) => {return '-r ' + x; }).join(' ') + ' -e -a --no-comment --comment "https://hatter.in/key" ' + txtFile).start();
        if ($$.file(userDir, txtFile + '.asc').exists()) {
            $$.file(userDir, txtFile).delete();
            println('UPDATE SUCCESS.');
        }
    } else {
        println('BYE.');
    }
};

main();
java.lang.System.exit(0);