#!/usr/bin/env node
/**
 * This code is closed source and Confidential and Proprietary to
 * Appcelerator, Inc. All Rights Reserved.  This code MUST not be
 * modified, copied or otherwise redistributed without express
 * written permission of Appcelerator. This file is licensed as
 * part of the Appcelerator Platform and governed under the terms
 * of the Appcelerator license agreement.
 */
var chalk = require('chalk'),
	semver = require('semver'),
	pkg = require('../package');

// check Node.js version
try {
	if (!semver.satisfies(process.version, pkg.engines.node)) {
		console.log(chalk.cyan('Appcelerator Command-Line Interface'));
		console.log('Copyright (c) 2014-' + (new Date().getFullYear()) + ', Appcelerator, Inc.  All Rights Reserved.');
		console.log('');
		console.log(chalk.red('ERROR: appc requires Node.js ' + semver.validRange(pkg.engines.node)));
		console.log('Visit ' + chalk.cyan('http://nodejs.org/') + ' to download a newer version.');
		console.log('');

		process.exit(1);
	}
} catch (e) {}

var fs = require('fs'),
	path = require('path'),
	util = require('../lib/util'),
	error = require('../lib/error'),
	lib = require('../lib/index'),
	debug = require('debug')('appc:bin'),
	opts = util.parseOpts(),
	args = util.parseArgs(opts),
	installBin = util.getInstallBinary(opts),
	dirError;

// backup our process.argv
process.__argv = [].concat(process.argv);

// set appc npm version
process.env.NPM_APPC_VERSION = pkg.version;

// set our npm cache directory to point to our own directory which we know is
// writable and doesn't conflict with other npms installed by the user
// we set this here so that all child processes will automatically pick them up
var npmCacheDir = util.getNpmCacheDirectory();
if (fs.existsSync(npmCacheDir)) {
	dirError = util.checkDirectory(npmCacheDir,'npm');
}
else {
	// make sure we write the directory
	util.ensureDir(npmCacheDir);
	dirError = util.checkDirectory(npmCacheDir,'npm');
}

// check if we have an error and if so, fail
if (dirError) {
	util.fail(dirError);
}

// if we get here, we're OK, set our environment.  this means anything we now
// do with npm should be in our user writable directory and not a different directory
process.env.npm_config_cache = npmCacheDir;
process.env.npm_config_prefix = npmCacheDir;

// we need to make sure our install directory is writable at all times and if not, give
// error up front
var installDir = util.getInstallDir();
if (fs.existsSync(installDir)) {
	dirError = util.checkDirectory(installDir,'install');
}
else {
	// make sure we write the directory
	util.ensureDir(installDir);
	dirError = util.checkDirectory(installDir,'install');
}

// check if we have an error and if so, fail
if (dirError) {
	util.fail(dirError);
}

// cleanup stale install tag
var installTag = util.getInstallTag();
if (fs.existsSync(installTag)) {
	fs.unlinkSync(installTag);
}

// set an environment to the location of our install directory and bin directory
process.env.APPC_INSTALL_DIR = installDir;
process.env.APPC_INSTALL_BIN_DIR = installBin;

debug('install bin is %o',installBin);

process.env.APPC_CONFIG_PROXY = util.getProxyServer();

function after(err, installDir, version, installBin) {
	debug('after called with %o',arguments);

	if (opts.setup) {
		// save our version
		util.writeVersion(version);

		var appcli = util.getConfigFile();

		// if we don't have this file, we need to prompt for login for first-run
		if (!fs.existsSync(appcli)) {
			var chalk = require('../vendor/chalk');
			console.log();
			console.log(chalk.yellow('Appcelerator login required. Please login now...'));
			console.log(chalk.yellow(chalk.dim('If you do not yet have an account, please visit '+chalk.underline('http://www.appcelerator.com/signup'))));
			console.log();
			var args = program.argv.splice(2);
			// run our login
			process.argv[2] = 'login';
			process.argv[3] = '--no-banner';
			process.argv.length = 4;
			util.mergeOptsToArgs(progress.argv,opts);
			debug('calling lib run %s',installBin);
			lib.run(installBin);
		}
		else {
			// no need to re-run login. we're already setup
			process.exit(0);
		}
	}
}

// any of these subcommands will be passed
var bundledSubcommands = /^(alloy|acs|cloud)$/;

/**
 * support delegating to these bundled binaries in the case
 * they are not already installed as standalone binaries.
 * this is also a nice compromise for all the functionality we
 * aren't going to include directly in the appc CLI such that
 * we can still provide more advanced capabilities directly
 * through these underlying CLIs
 */
function subprocess(cmd, installBin) {
	var which = require('which'),
		spawn = require('child_process').spawn,
		pkg = path.join(installBin, '..','..'),
		version = path.basename(path.dirname(pkg)),
		argv = [],
		bin,
		env = process.env,
		argopts = { env: env, stdio:'inherit' };

	// re-create args exactly as passed in but remove our subcommand
	var _args = process.argv.splice(2);
	for (var c=0;c<_args.length;c++) {
		var arg = _args[c];
		if (arg!==cmd) {
			argv.push(arg);
		}
	}

	// set some special environment variables that can be used inside this scripts eventually if necessary
	env.APPC_VERSION = version;
	env.APPC_VERSION_DIR = pkg;
	env.APPC_SUBPROCESS = 1;

	// use our bundled version
	switch(cmd) {
		case 'alloy': {
			bin = path.resolve(path.join(pkg, 'node_modules','appc-cli-titanium','node_modules','alloy','bin','alloy'));
			break;
		}
		case 'cloud':
		case 'acs': {
			bin = path.resolve(path.join(pkg, 'node_modules','arrow','node_modules','acs','bin','acs'));
			cmd = 'acs';
			break;
		}
	}

	if (!fs.existsSync(bin)) {
		error.failWithError('com.appcelerator.install.binary.missing',bin,pkg,version);
	}

	debug('calling spawn with %s, bin=%s, argv=%j, argopts=%j',process.execPath,bin,argv,argopts);

	// for windows, we need to actually run from node since these binaries aren't setup with cmd.exe
	var childArgs = (path.extname(bin).toLowerCase() === '.cmd') ? [bin, argv, argopts] :
		[process.execPath, [bin].concat(argv), argopts];
	var child = spawn.apply(null, childArgs);

	child.on('error', function(err){
		error.failWithError('com.appcelerator.install.binary.error',bin,err.message||String(err));
	});
}

function main() {

	var subcommand = args[0];
	debug('main subcommand %s',subcommand);

	// see if this is a use command
	if (process.argv.length > 2) {
		if (subcommand==='use') {
			return lib.use(opts, function(err) {
				if (err) {
					if (err.name === 'AppCError') {
						err.failWithStackTrace();
					}
					error.failWithError('com.appcelerator.install.download.server.response.error',err.message||String(err));
				}
				// if we get here, we didn't find a version and we need to install it
				return lib.install(util.getInstallDir(), opts);
			});
		}
		else {
			if (opts.version) {
				debug('main version found %s',opts.version);
				// if we aren't asking to print out the version but to use a specific version
				// we will set the version (remove the --version from args) and then run command
				// with this version
				if (opts.version!==true) {
					// set it explicitly by passing the version (otherwise will resolve to available)
					// if it doesn't explicitly find it, will return null and then install below
					installBin = util.getInstallBinary(opts,opts.version);
					debug('main explicitly set a version, installBin=%s',installBin);
					// delete --version so we don't add to pass through args
					var _args = [];
					for (var c=0;c<process.argv.length;c++) {
						var match = /^--version(=?)/.exec(process.argv[c]);
						if (match) {
							// if this is --version x.x.x we need to skip the next arg too
							if (!match[1]) {
								c++;
							}
							continue;
						}
						else {
							_args.push(process.argv[c]);
						}
					}
					process.argv = _args;
					debug('main set new args to %o',_args);
					if (!installBin) {
						// doesn't exist so we need to first install and then run it, but do it
						// here so that after doesn't get used below
						return lib.install(util.getInstallDir(), opts);
					}
				}
			}
		}
	}
	// see if setup
	if (args[0]==='setup') {
		opts.setup = true;
		installBin = null;
		debug('main setup found');
	}
	// if we can't find a suitable install binary, we need to install one
	if (!installBin || !fs.existsSync(installBin)) {
		opts.setup = true;
		debug("main - !installBin or couldn't find it %s",installBin);
		lib.install(util.getInstallDir(), opts, after);
	}
	// otherwise, we should just run
	else {
		// first update check if required
		util.updateCheck(opts, function(){

			// check to see if this is a bundled subcommand
			if (bundledSubcommands.test(subcommand)){
				debug("main - bundled subcommand, calling subprocess");
				return subprocess(subcommand,installBin);
			}

			// now run
			lib.run(installBin);
		});
	}
}

// run our program
main();