#!/usr/bin/env php
<?php
$params = getParams();
$root = str_replace('\\', '/', __DIR__);
$envs = require("$root/environments/index.php");
$envNames = array_keys($envs);

echo "Yii Application Initialization Tool v1.0\n\n";

$envName = null;
if (empty($params['env'])) {
	echo "Which environment do you want the application to be initialized in?\n\n";
	foreach ($envNames as $i => $name) {
		echo "  [$i] $name\n";
	}
	echo "\n  Your choice [0-" . (count($envs) - 1) . ', or "q" to quit] ';
	$answer = trim(fgets(STDIN));

	if (!ctype_digit($answer) || !in_array($answer, range(0, count($envs) - 1))) {
		echo "\n  Quit initialization.\n";
		exit(0);
	}

	if (isset($envNames[$answer])) {
		$envName = $envNames[$answer];
	}
}
else {
	$envName = $params['env'];
}

if (!in_array($envName, $envNames)) {
	$envsList = implode(', ', $envNames);
	echo "\n  $envName is not a valid environment. Try one of the following: $envsList. \n";
	exit(2);
}

$env = $envs[$envName];

if (empty($params['env'])) {
	echo "\n  Initialize the application under '{$envNames[$answer]}' environment? [yes|no] ";
	$answer = trim(fgets(STDIN));
	if (strncasecmp($answer, 'y', 1)) {
		echo "\n  Quit initialization.\n";
		exit(0);
	}
}

echo "\n  Start initialization ...\n\n";
$files = getFileList("$root/environments/{$env['path']}");
$all = false;
foreach ($files as $file) {
	if (!copyFile($root, "environments/{$env['path']}/$file", $file, $all)) {
		break;
	}
}

if (isset($env['writable'])) {
	foreach ($env['writable'] as $writable) {
		echo "      chmod 0777 $writable\n";
		@chmod("$root/$writable", 0777);
	}
}

if (isset($env['executable'])) {
	foreach ($env['executable'] as $executable) {
		echo "      chmod 0755 $executable\n";
		@chmod("$root/$executable", 0755);
	}
}

echo "\n  ... initialization completed.\n\n";

function getFileList($root, $basePath = '')
{
	$files = [];
	$handle = opendir($root);
	while (($path = readdir($handle)) !== false) {
		if ($path === '.svn' || $path === '.' || $path === '..') {
			continue;
		}
		$fullPath = "$root/$path";
		$relativePath = $basePath === '' ? $path : "$basePath/$path";
		if (is_dir($fullPath)) {
			$files = array_merge($files, getFileList($fullPath, $relativePath));
		} else {
			$files[] = $relativePath;
		}
	}
	closedir($handle);
	return $files;
}

function copyFile($root, $source, $target, &$all)
{
	if (!is_file($root . '/' . $source)) {
		echo "       skip $target ($source not exist)\n";
		return true;
	}
	if (is_file($root . '/' . $target)) {
		if (file_get_contents($root . '/' . $source) === file_get_contents($root . '/' . $target)) {
			echo "  unchanged $target\n";
			return true;
		}
		if ($all) {
			echo "  overwrite $target\n";
		} else {
			echo "      exist $target\n";
			echo "            ...overwrite? [Yes|No|All|Quit] ";
			$answer = trim(fgets(STDIN));
			if (!strncasecmp($answer, 'q', 1)) {
				return false;
			} else {
				if (!strncasecmp($answer, 'y', 1)) {
					echo "  overwrite $target\n";
				} else {
					if (!strncasecmp($answer, 'a', 1)) {
						echo "  overwrite $target\n";
						$all = true;
					} else {
						echo "       skip $target\n";
						return true;
					}
				}
			}
		}
		file_put_contents($root . '/' . $target, file_get_contents($root . '/' . $source));
		return true;
	}
	echo "   generate $target\n";
	@mkdir(dirname($root . '/' . $target), 0777, true);
	file_put_contents($root . '/' . $target, file_get_contents($root . '/' . $source));
	return true;
}

function getParams()
{
	$rawParams = [];
	if (isset($_SERVER['argv'])) {
		$rawParams = $_SERVER['argv'];
		array_shift($rawParams);
	}

	$params = [];
	foreach ($rawParams as $param) {
		if (preg_match('/^--(\w+)(=(.*))?$/', $param, $matches)) {
			$name = $matches[1];
			$params[$name] = isset($matches[3]) ? $matches[3] : true;
		} else {
			$params[] = $param;
		}
	}
	return $params;
}
