<?php

namespace Spark\DevMode;

use Spark\Environment\Environment;

class DevMode
{
    private Environment $env;

    public function __construct(Environment $environment)
    {
        $this->env = $environment;
    }

    public function run()
    {
        $script = $this->env->getScriptRunner();
        $conf = $this->getConfig();

        $title = $conf['title'];
        if ($title) {
            passthru('xtitle '.escapeshellarg("starting: ".$title));
        }

        $startup = $conf['startup'];
        if ($startup) {
            $script->evaluate($startup);
        }

        if ($title) {
            passthru('xtitle '.escapeshellarg($title));
        }

        $localenv = $conf['localenv'];
        $envlocal = $this->env->getProjectDirectory()."/.env.local";
        if (is_array($localenv) && !file_exists($envlocal)) {
            printf("* Creating temporary %s\n", $envlocal);
            file_put_contents($envlocal, join("\n", $localenv));
        } else {
            $localenv = null;
        }

        $shell = $conf['shell'];
        if (!$shell) {
            $this->runDefaultShell();
        } else {
            passthru("exec ".$shell);
        }

        if ($title) {
            passthru('xtitle '.escapeshellarg("stopping: ".$title));
        }

        if ($localenv) {
            unlink($envlocal);
        }

        $shutdown = $conf['shutdown'];
        if ($shutdown) {
            $script->evaluate($shutdown);
        }

        if ($title) {
            passthru('xtitle');
        }
    }

    private function runDefaultShell()
    {
        $init = $this->env->getProjectDirectory() . "/.devmoderc~";
        $initrc = [];
        foreach ($_ENV as $e=>$v) {
            $initrc[] = sprintf("export %s=%s", $e, escapeshellarg($v));
        }

            //"source \$HOME/.bashrc",
        $initrc[] = "test -f .spark/devmode.rc && source .spark/devmode.rc";
        $proj = basename($this->env->getProjectDirectory());
        $initrc[] = "function _dev_prompt {";
        $initrc[] = "  export PS1=\"\[\e[40;37m\] \u{26a1}  \[\e[44;37m\] {$proj} \[\e[0m\] \w \$ \"";
        $initrc[] = "}";
        $initrc[] = "export PROMPT_COMMAND=_dev_prompt";
        file_put_contents($init, join("\n", $initrc));

        $cmdl = "exec bash --rcfile ".escapeshellarg($init);
        passthru($cmdl);
        unlink($init);
    }

    private function getConfig(): array
    {
        $defaults = [
            'title'=> null,
            'triggers' => [],
            'startup' => null,
            'shutdown' => null,
            'localenv' => null,
            'shell' => null,
        ];

        $conf = $this->env->readConfig("devmode.json");
        if (!isset($conf['devmode'])) {
            fprintf(STDERR, "Warning: Invalid devmode.json file\n");
            return $defaults;
        }
        
        return array_merge($defaults, $conf['devmode']);
    }


}