<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;

class GenerateTreeCommand extends Command
{

    private $routesFile = null;

    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'generatetree
                            {path: /path/to/tree.txt}';

    /**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {

        $lines = ['<?php', '', 'use Illuminate\Support\Facades\Route;', '', ''];
        file_put_contents(base_path("routes/generated.php"), implode("\n", $lines));

        global $argv;
        $file = fopen($argv[2], "r");
        $lines = [];
        while (!feof($file)) {
            $line = rtrim(fgets($file));
            if(trim($line) !== '') {
                $lines[] = $line;
            }
        }

        fclose($file);

        $currentRoot = "";
        $currentController = new GenController();
        $currentSubController = new GenController();
        $currentSubType = "";
        $currentView = "";

        foreach ($lines as $line) {
            $lineType = null;

            // no leading space - root specifier
            if($line[0] !== ' ') {
                $currentRoot = trim($line);
            }
            else {

                $ls = $this->numLS($line);
                $line = trim($line);

                $tokens = explode("|", $line);
                $line = $tokens[0];
                $dbTable = null;
                if(count($tokens) === 2) {
                    $dbTable = $tokens[1];
                }

                switch($ls) {

                    case 4: // top level controller OR top level controller action

                        // top level controller-action
                        if(strpos($line, "/") !== FALSE) {
                            if(!empty($currentController)) {
                                $method = explode("/", $line)[1];
                                $newMethod = $currentController->addMethod($method, "/" . $line);
                                // create _SINGLE_ controller if view
                                if($method === "view") {
                                    $currentSubController = new GenController($currentRoot, $currentController->name . "_SINGLE");
                                    $currentSubController->dbTable = $currentController->dbTable;
                                    $currentSubController->parentRoute = "/" . $line;
                                    $newMethod->redirect = "/" . $line . "/SUB_dashboard";
                                }
                            }
                        }
                        // new top level controller
                        else if(empty($currentController) || $line !== $currentController->name) {
                            if(!empty($currentController)) {
                                $currentController->save();
                            }
                            $currentController = new GenController($currentRoot, $line);
                            $currentController->dbTable = $dbTable;
                            $currentController->addMethod("index", "/$line");
                            if(!empty($currentSubController)) {
                                $currentSubController->save();
                            }
                            $currentSubType = '';
                            $currentSubController = new GenController();
                        }
                        break;

                    case 8: // sub-type declaration

                        $currentSubType = $line;
                        break;

                    case 12: // subs and actions

                        if($currentSubType === 'ACTIONS') {
                            $currentSubController->addMethod(
                                "ACTION_" . $line,
                                "/ACTION_" . $line
                            );
                        }
                        else if($currentSubType === 'SUB') {
                            $currentSubController->addMethod(
                                "SUB_" . $line,
                                "/SUB_" . $line
                            );
                        }
                        break;

                }

            }
        }

        // do any pending saves
        if(!empty($currentSubController)) {
            $currentSubController->save();
        }
        if(!empty($currentController)) {
            $currentController->save();
        }

        echo "Saved " . base_path("routes/generated.php") . "\n";

    }

    private function numLS($line) {
        $count = 0;
        for ($i=0; $i<strlen($line); $i++) {
            if($line[$i] !== ' ') break;
            $count++;
        }
        return $count;
    }

    private function initRoutesFile() {

    }

}

class GenController {
    public $root;
    public $saved = false;
    public $name;
    public $methods;
    public $parentRoute = "";
    public $single = false;
    public $dbTable = null;
    public function __construct($root = null, $name = null)
    {
        $this->root = $root;
        $this->name = $name;
        $this->methods = [];
    }
    public function addMethod($method, $route) {
        if($this->parentRoute) {
            $route = $this->parentRoute . $route;
        }
        $method = new GenControllerMethod($method, $route);
        $this->methods[] = $method;
        return $method;
    }
    public function save() {
        if(!$this->saved && !empty($this->root) && !empty($this->name)) {
            $this->saveController();
            $this->saveRoutes();
            $this->saved = true;
            $this->log();
        }
    }
    public function saveController() {
        $text = file_get_contents(base_path('generatecv/tree-templates/controller.template.php'));
        $code = [];
        foreach ($this->methods as $method) {
            $code[] = "";
            $code[] = "\t// GET {$method->route}";
            $code[] = "\t" . 'public function ' . $method->name . '(Request $request' . ($method->hasUID ? ', $uid' : '') . ') {';

            if($method->redirect) {
                $code[] = "\t\treturn redirect('$method->redirect');";
            }
            else {
                if($method->hasUID) {
                    $code[] = "\t\t\$record = DB::table('{$this->dbTable}')->where('uid', \$uid)->first();";
                    $code[] = "\t\treturn view('{$this->root}/{$this->name}/{$method->name}', compact('record'));";
                }
                else {
                    $code[] = "\t\t\$records = DB::table('{$this->dbTable}')->get();";
                    $code[] = "\t\treturn view('{$this->root}/{$this->name}/{$method->name}', compact('records'));";
                }
            }

            $code[] = "\t}";
        }
        $text = str_replace("_NAME_", "{$this->name}_Controller", $text);
        $text = str_replace("// __METHODS__", implode("\n", $code), $text);
        file_put_contents(app_path("Http/Controllers/{$this->name}_Controller.php"), $text);
        echo "Generated " . app_path("Http/Controllers/{$this->name}_Controller.php") . "\n";
    }
    public function saveRoutes() {
        $lines = ["// --- {$this->root}: {$this->name} --- //"];
        foreach ($this->methods as $method) {
            // FORMAT:
            // Route::get('/foo/bar/{uid}', 'FooController@bar')->name('foo-action');
            $lines[] = "Route::get('{$method->route}', '{$this->name}_Controller@{$method->name}')->name('{$this->name}-{$method->name}');";
        }
        $lines[] = '';
        $lines[] = '';
        file_put_contents(base_path("routes/generated.php"), implode("\n", $lines), FILE_APPEND);
    }
    public function log() {
        $this->w('');
        $this->w("Controller: app/Http/Controllers/{$this->name}_Controller");
        $this->w("Table: {$this->dbTable}");
        $this->w('---------------------------------------------');
        foreach ($this->methods as $method) {
            $this->w('Rout: ' . $method->route, 1);
            $this->w('Meth: ' . $method->name . '($request' . ($method->hasUID ? ', $uid' : '') . ')', 1);
            if(!$method->redirect) {
                $this->w('View: ' . resource_path("views/{$this->root}/{$this->name}/{$method->name}.blade.php"), 1);
            }
            else {
                $this->w('Redi: ' . $method->redirect, 1);
            }
            $this->w('---------------------------------------------');
        }
    }
    public function w($line, $level = -1) {
        for($i=0; $i<$level; $i++) echo "\t";
        echo "$line\n";
    }
}

class GenControllerMethod {
    public $name;
    public $route;
    public $hasUID = false;
    public $redirect = false;
    public function __construct($name, $route)
    {
        $this->name = $name;
        $this->route = $route;
        if(strpos($this->route, "{uid}") !== FALSE) {
            $this->hasUID = true;
        }
    }
}