<?php

namespace Spark\Environment;

use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use Spark\SparkApplication;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;

class Environment
{

    private bool $loaded = false;

    private array $config;

    public function __construct(array $config)
    {
        $this->config = $config;
    }

    public function getProjectDirectory(): string
    {
        return $this->config['project_dir'];
    }

    public function getConfigDirectory(): string
    {
        return $this->config['config_dir'];
    }

    public function getDefinedScripts(): array
    {
        return array_keys($this->config['scripts']??[]);
    }

    public function runScript(string $name, array $args, InputInterface $input, OutputInterface $output)
    {
        $script = $this->config['scripts'][$name]??$name;
        
        if (is_string($script)) {
            $this->execScript($script, $args);
        } elseif (is_array($script)) {
            foreach ($script as $row) {
                $a = str_getcsv($row, ' ', "'");
                $c = array_shift($a);
                if (str_starts_with($c, '@')) {
                    $c = ($this->config['scripts'][substr($c,1)])??$c;
                    $this->runScript($c, $a, $input, $output);
                } else {
                    $this->execScript($c, $a);
                }
            }
        }
    }

    private function execScript(string $script, array $args)
    {
            // call script directly
            if (str_ends_with($script, '.php')) {
                $GLOBALS['args'] = $args;
                $GLOBALS['output'] = $output;
                $base = $this->getProjectDirectory();
                if (!file_exists($base ."/". $script)) {
                    fprintf(STDERR, "error: Could not find script file %s\n", $base."/".$script);
                    return;
                }
                //echo "# ".$base."/".$script."\n";
                include $base . "/" . $script;
            } else {
                //echo "$ {$script}\n";
                passthru($script);
            }
    }

    public function loadEnvironment()
    {
        if ($this->loaded) {
            return;
        }

        if (!array_key_exists('project_dir', $this->config)) {
            return;
        }

        // $this->logger->info("Loading environment...");
        $preloads = [];
        $root = $this->config['project_dir'];
        foreach ((array)$this->config['preload']??[] as $preload) {
            if (str_contains($preload,'*')) {
                array_push($preloads, ...glob($root."/".$preload));
            } else {
                array_push($preloads, $preload);
            }
        }
        
        foreach ($preloads as $item) {
            if (!str_starts_with($item, "/")) {
                $item = $this->getProjectDirectory() . "/" . $item;
            }
            if (is_file($item)) {
                // $this->logger->debug("Preloading file {$item}");
                try {
                    include_once($item);
                } catch (\Throwable $t) {
                    fprintf(STDERR, "error: Error preloading %s: %s in %s on line %d\n", $item,  $t->getMessage(), $t->getFile(), $t->getLine());
                    //$this->logger->error("Error preloading {$item}: {$t->getMessage()} in {$t->getFile()} on line {$t->getLine()}");
                }
            } elseif (is_dir($item) && file_exists($item."/sparkplug.php")) {
                //$this->logger->debug("Preloading plugin {$item}");
                try {
                    include_once($item."/sparkplug.php");
                } catch (\Throwable $t) {
                    fprintf(STDERR, "error: Error preloading plugin %s: %s in %s on line %d\n", $item,  $t->getMessage(), $t->getFile(), $t->getLine());
                    //$this->logger->error("Error preloading plugin {$item}: {$t->getMessage()} in {$t->getFile()} on line {$t->getLine()}");
                }
            } else {
                fprintf(STDERR, "warning: Could not preload %s\n", $item);
                //$this->logger->warning("Could not preload {$item}");
            }
        }

        SparkApplication::$instance->getPluginManager()->initializePlugins();
    }

    public static function createFromDirectory(string|null $directory=null): Environment
    {
        $directory = $directory ?? getcwd();
        $candidates = [ $directory . "/.spark.json", $directory . "/.spark/spark.json" ];
        $config = [];
        while ($candidate = array_shift($candidates)) {
            if (!file_exists($candidate)) { continue; }
            $json = file_get_contents($candidate);
            if (!$json || json_last_error()) {
                throw new \RuntimeException("Error parsing {$candidate}: ".json_last_error_msg());
            }
            $config = json_decode($json, true);
            $config['project_dir'] = realpath($directory);
            $config['config_dir'] = realpath($directory)."/.spark";
            $config['config_file'] = $candidate;
            break;
        }

        $env = new Environment($config);

        return $env;
    }


}