<?php
namespace application\controllers;

class SiteController {
    public static function init($data): void {
        $username =  $data['username'];
        $domain =    $data['domain'];
        $adminName = $data['admin_name'] ?? '';
        $adminPassword = $data['admin_password'];
        $webDir = "/home/$username/$domain";
        $placeholderdir = "/var/www/catchall";
        $configTemplate = '/etc/apache2/site-config.in';
        $configFile = "/etc/apache2/sites-enabled/$domain.conf";

        if (empty($username) || empty($domain) || empty($adminName) || empty($adminPassword)) {
            error_log("deploy: ERROR: No username, domain, admin_name or admin_password provided");
            http_response_code(400);
            error_log("deploy: ERROR: UserName 1 " .    $username);
            error_log("deploy: ERROR: Domain   1 " .    $domain);
            error_log("deploy: ERROR: UserName 2 " .    $data['username'] );
            error_log("deploy: ERROR: Domain   2 " .    $data['domain']   );
            error_log("deploy: ERROR: AdminName  " .    $adminName);
            error_log("deploy: ERROR: AdminPasswd" . $adminPassword);

            error_log(print_r($data,true));
            echo json_encode(['error' => 'Missing required parameters']);
            return;
        }

        error_log(" Starting function init for " . $username . " and " . $domain . "  DebugMode: " . $GLOBALS['debug']);

        if ($GLOBALS['debug'] == true) { error_log("Creating Webdir ($webDir) for : " . $username); }
        exec("sudo /usr/bin/mkdir -p $webDir 2>&1", $mkdirOutput, $mkdirReturnCode);
            if ($mkdirReturnCode !== 0) {
                error_log("init: ERROR: Create Webdir $webDir for $username failed, details => ". implode("\n", $mkdirOutput));
                http_response_code(500);
                echo json_encode(['error' => 'Failed to create web dir', 'details' => implode("\n", $mkdirOutput)]);
                return;
            }

        if ($GLOBALS['debug'] == true) { error_log("Chown webdir: " . $username); }
        exec("sudo /usr/bin/chown $username:$username $webDir -R 2>&1", $chownOutput, $chownReturnCode);
        if ($chownReturnCode !== 0) {
            error_log("deploy: ERROR: chown on $webDir failed, details => " . implode("\n", $chownOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to chown webdir', 'details' => implode("\n", $chownOutput)]);
            return;
        }

        if ($GLOBALS['debug'] == true) { error_log("Reading Apache Config Template /etc/apache2/site-config.in"); }
        $configContent = file_get_contents($configTemplate);

        if ($GLOBALS['debug'] == true) { error_log("Replace config settings in Apache Config Template"); }
        $configContent = str_replace(['DOCUMENTROOT', 'SERVERNAME','USERNAME', 'DOMAINNAME', 'SERVERALIAS'], [$webDir, $domain, $username, $domain, "" ], $configContent);

        if ($GLOBALS['debug'] == true) { error_log("Running Certbot for Domain " . $domain); }
        exec("sudo /usr/bin/certbot certonly --webroot -w /etc/apache2/letsencrypt -d $domain --non-interactive --agree-tos --email admin@$domain 2>&1", $output, $returnCode);
        if ($returnCode !== 0) {
            error_log("deploy: ERROR: certbot failed to create certificate on $domain, details => " . implode("\n", $output));
            http_response_code(500);
            echo json_encode(['error' => 'Certbot failed', 'details' => implode("\n", $output)]);
            return;
        }
        if ($GLOBALS['debug'] == true) { error_log("Replace sslsettings in in Apache Config Template"); }
        $configContent = str_replace('DOMAINNAME', $domain, $configContent);

        if ($GLOBALS['debug'] == true) { error_log("Writing apache config file to " . $configFile); }
        if (file_put_contents($configFile, $configContent) != true) {
            error_log("deploy: ERROR: while writing apache config");
            echo json_encode(['error' => 'Failed to write Apache config', 'details' => []]);
        }

        exec('sudo /usr/bin/systemctl reload apache2  2>&1', $apacheOutput, $apacheReturnCode);
        if ($GLOBALS['debug'] == true) { error_log("Restarting Apache"); }
        if ($apacheReturnCode !== 0) {
            error_log("deploy: ERROR: Apache Reload error, details => " . implode("\n", $apacheOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to reload Apache', 'details' => implode("\n", $apacheOutput)]);
            return;
        }

        if ($GLOBALS['debug'] == true) { error_log("Install Placeholder on : " . $webDir); }
        exec("sudo /usr/bin/cp -rf $placeholderdir/* $webDir/. 2>&1", $mkdirOutput, $cpReturnCode);
        if ($cpReturnCode !== 0) {
            error_log("deploy: ERROR: Copy placeholder for $username failed, details => ". implode("\n", $mkdirOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to copy placeholder', 'details' => implode("\n", $mkdirOutput)]);
            return;
        }

        echo json_encode(['success' => 'Development site deployed successfully','details' => '']);
    }

    public static function deploy($data): void  {
        $domain = $data['domain'] ?? '';
        error_log("deploy: DEBUG: " . print_r($data, true));

        if (empty($domain)) {
            http_response_code(400);
            echo json_encode(['error' => 'Missing required parameter: domainname']);
            return;
        }
        echo json_encode(['result' => ['status' => 'FINISHED']]);
    }

    public static function revert($data): void {
        $username = $data['username'] ?? '';
        $domain = $data['domain'] ?? '';
        $webDir = "/home/$username/$domain";
        $placeholderdir = "/var/www/catchall";

        exec("sudo /usr/bin/rm -rf $webDir 2>&1", $rmOutput, $rmReturnCode);
            if ($rmReturnCode !== 0) {
                error_log("revert: error on rm $webDir -r, details => " . implode("\n", $rmOutput));
                http_response_code(500);
                echo json_encode(['error' => 'Failed to remove webdir dir', 'details' => implode("\n", $rmOutput)]);
                return;
            }

        exec("sudo /usr/bin/mkdir $webDir  2>&1", $mkdirOutput, $mkdirReturnCode);
            error_log("revert: error on mkdir $webDir, details => " . implode("\n", $mkdirOutput));
            if ($mkdirReturnCode !== 0) {
                http_response_code(500);
                echo json_encode(['error' => 'Failed to create web dir', 'details' => implode("\n", $mkdirOutput)]);
                return;
            }

        if ($GLOBALS['debug'] == true) { error_log("Install Placeholder on : " . $webDir); }
        exec("sudo /usr/bin/cp -rf $placeholderdir/* $webDir/. 2>&1", $mkdirOutput, $cpReturnCode);
        if ($cpReturnCode !== 0) {
            error_log("deploy: ERROR: Copy placeholder for $username failed, details => ". implode("\n", $mkdirOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to copy placeholder', 'details' => implode("\n", $mkdirOutput)]);
            return;
        }

        if ($GLOBALS['debug'] == true) { error_log("Install Placeholder on : " . $webDir); }
        exec("sudo /usr/bin/cp -rf $placeholderdir/* $webDir/. 2>&1", $mkdirOutput, $cpReturnCode);
        if ($cpReturnCode !== 0) {
            error_log("deploy: ERROR: Copy placeholder for $username failed, details => ". implode("\n", $mkdirOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to copy placeholder', 'details' => implode("\n", $mkdirOutput)]);
            return;
        }

        if ($GLOBALS['debug'] == true) { error_log("Change ownership on : " . $webDir); }
        exec("sudo /usr/bin/chown $username:$username $webDir  2>&1", $chownOutput, $chownReturnCode);
        if ($chownReturnCode !== 0) {
            error_log("revert: chown error on $webDir, details => " . implode("\n", $chownOutput));
            http_response_code(500);
            echo json_encode(['error' => 'Failed to chown web dir', 'details' => implode("\n", $chownOutput)]);
            return;
        }
        
        echo json_encode(['success' => 'Development site deployed successfully']);
    }

    public static function disable($data): void {
        $domain = $data['domain'] ?? '';

        if (empty($domain)) {
            http_response_code(400);
            echo json_encode(['error' => 'Missing required parameter: domainname']);
            return;
        }

        $enabledConfig = "/etc/apache2/sites-enabled/$domain.conf";
        $availableConfig = "/etc/apache2/sites-available/$domain.conf";

        if (!file_exists($enabledConfig)) {
            http_response_code(404);
            echo json_encode(['error' => 'Configuration file not found']);
            return;
        }

        if (!rename($enabledConfig, $availableConfig)) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to move configuration file']);
            return;
        }

        exec('systemctl reload apache2', $output, $returnCode);
        if ($returnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to reload Apache', 'details' => implode("\n", $output)]);
            return;
        }

        echo json_encode(['success' => 'Production site disabled successfully']);
    }
    
    public static function enable($data): void  {
        $domain = $data['domain'] ?? '';

        if (empty($domain)) {
            http_response_code(400);
            echo json_encode(['error' => 'Missing required parameter: domainname']);
            return;
        }

        $availableConfig = "/etc/apache2/sites-available/$domain.conf";
        $enabledConfig = "/etc/apache2/sites-enabled/$domain.conf";

        if (!file_exists($availableConfig)) {
            http_response_code(404);
            echo json_encode(['error' => 'Configuration file not found']);
            return;
        }

        if (!rename($availableConfig, $enabledConfig)) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to move configuration file']);
            return;
        }

        exec('systemctl reload apache2', $output, $returnCode);
        if ($returnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to reload Apache', 'details' => implode("\n", $output)]);
            return;
        }

        echo json_encode(['success' => 'Production site enabled successfully']);
    }

    public static function isenabled($data): void {
        $domain = $data['domain'] ?? '';

        if (file_exists("/etc/apache2/sites-enabled/$domain.conf")) {
            echo json_encode(['isenabled' => 'YES']);
        } else {
            echo json_encode(['isenabled' => 'NO']);
        }
    }

    public static function migrate($data): void {
        $username = $data['username'] ?? '';
        $domain = $data['domain'] ?? '';
        $adminName = $data['admin_name'] ?? '';
        $adminPassword = $data['admin_password'] ?? '';
        if (empty($username) || empty($domain) || empty($adminName) || empty($adminPassword)) {
            http_response_code(400);
            echo json_encode(['error' => 'Missing required parameters']);
            return;
        }
	    $webDir = "/home/$username/prod.$domain";
        $configFile = "/etc/apache2/sites-enabled/prod.$domain.conf";
	    $configTemplate = '/etc/apache2/site-config.in';
        exec("sudo /usr/bin/mkdir $webDir", $mkdirOutput, $mkdirReturnCode);
        if ($mkdirReturnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to create web dir', 'details' => implode("\n", $mkdirOutput)]);
            return;
        }

        exec("sudo /usr/bin/chown $username:$username $webDir", $chownOutput, $chownReturnCode);
        if ($chownReturnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to chown web dir', 'details' => implode("\n", $chownOutput)]);
            return;
        }

	    $configContent = file_get_contents($configTemplate);
        $configContent = str_replace(['DOCUMENTROOT', 'SERVERNAME','USERNAME','DOMAINNAME', 'SERVERALIAS'], [$webDir, "prod.$domain","prod.$domain", "www.$domain" ], $configContent);
        file_put_contents($configFile, $configContent);

        exec("sudo /usr/bin/certbot certonly --webroot -w /etc/apache/letsencrypt -d www.$domain -d $domain --non-interactive --agree-tos --email admin@$domain", $output, $returnCode);
        if ($returnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Certbot failed', 'details' => implode("\n", $output)]);
            return;
        }

        exec('sudo /usr/bin/systemctl reload apache2', $apacheOutput, $apacheReturnCode);
        if ($apacheReturnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to reload Apache', 'details' => implode("\n", $apacheOutput)]);
            return;
        }

        // Deployment from dev to prod
        exec("sudo /usr/bin/cp -r /home/$username/dev.$domain/* $webDir",$cpOutput,$cpReturnCode);
        if ($cpReturnCode !== 0) {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to copy dev installation into prod directory', 'details' => implode("\n", $cpOutput)]);
            return;
        }

        //TODO Replace Settings in Prod Environment

        if ($GLOBALS['debug'] == true) { error_log("Chown WebDir $webDir"); }
        exec("sudo /usr/bin/chown $username:$username $webDir -R  2>&1", $chownOutput, $chownReturnCode);
            if ($chownReturnCode !== 0) {
                error_log("deploy: chown error on $webDir, details => " . implode("\n", $chownOutput));
                http_response_code(500);
                echo json_encode(['error' => 'Failed to chown web dir', 'details' => implode("\n", $chownOutput)]);
                return;
            }

	    echo json_encode(['success' => 'Production site successfully from dev']);

    }

    public static function undeploy($data): void {
        $username = $data['username'] ?? '';
        $domain = $data['domain'] ?? '';
        if (empty($username)) {
            error_log("Undeploy: ERROR: No username provided");
            http_response_code(400);
            error_log(print_r($data,true));
            echo json_encode(['error' => 'Missing username']);
            return;
        }
        if( strpos(file_get_contents("/etc/passwd"),$username) == false) {
            error_log("Undeploy: ERROR: User $username does not exist");
            http_response_code(400);
            error_log(print_r($data,true));
            echo json_encode(['error' => 'Unknown user']);
            return;
        }
        if(!empty($domain)) {
            $enableConfigFile = "/etc/apache2/sites-enabled/$domain.conf";
            $disableConfigFile = "/etc/apache2/sites-available/$domain.conf";
            if ($GLOBALS['debug'] == true) { error_log("Remove config of user : " . $username); }
            exec("sudo /usr/bin/rm -f $enableConfigFile 2>&1", $userOutput, $userReturnCode);
            exec("sudo /usr/bin/rm -f $disableConfigFile 2>&1", $userOutput, $userReturnCode);
            exec("sudo /usr/bin/certbot delete --cert-name $domain --non-interactive 2>&1", $output, $returnCode);
            if ($returnCode !== 0) {
                error_log("Undeploy: ERROR: certbot failed to delete certificate on $domain, details => " . implode("\n", $output));
                http_response_code(500);
                echo json_encode(['error' => 'Certbot failed', 'details' => implode("\n", $output)]);
                return;
            }
            exec('sudo /usr/bin/systemctl reload apache2  2>&1', $apacheOutput, $apacheReturnCode);
            if ($GLOBALS['debug'] == true) { error_log("Restarting Apache"); }
            if ($apacheReturnCode !== 0) {
                error_log("Undeploy: ERROR: Apache Reload error, details => " . implode("\n", $apacheOutput));
                http_response_code(500);
                echo json_encode(['error' => 'Failed to reload Apache', 'details' => implode("\n", $apacheOutput)]);
                return;
            }   
        }
        echo json_encode(['success' => 'Undeploy site prod.' . $domain . ' successfully']);
    }

}