<?php

declare(strict_types=1);

namespace SPC\util;

use SPC\builder\BuilderBase;
use SPC\builder\BuilderProvider;
use SPC\builder\macos\MacOSBuilder;
use SPC\store\Config;
use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Console\Input\InputInterface;

class SPCConfigUtil
{
    public function __construct(private ?BuilderBase $builder = null, ?InputInterface $input = null)
    {
        if ($builder === null) {
            $this->builder = BuilderProvider::makeBuilderByInput($input ?? new ArgvInput());
        }
    }

    public function config(array $extensions = [], array $libraries = [], bool $include_suggest_ext = false, bool $include_suggest_lib = false): array
    {
        [$extensions, $libraries] = DependencyUtil::getExtsAndLibs($extensions, $libraries, $include_suggest_ext, $include_suggest_lib);

        ob_start();
        $this->builder->proveLibs($libraries);
        $this->builder->proveExts($extensions);
        ob_get_clean();
        $ldflags = $this->getLdflagsString();
        $libs = $this->getLibsString($libraries);
        $cflags = $this->getIncludesString();

        // embed
        $libs = '-lphp -lc ' . $libs;
        $extra_env = getenv('SPC_CMD_VAR_PHP_MAKE_EXTRA_LIBS');
        if (is_string($extra_env)) {
            $libs .= ' ' . trim($extra_env, '"');
        }
        // c++
        if ($this->builder->hasCpp()) {
            $libs .= $this->builder instanceof MacOSBuilder ? ' -lc++' : ' -lstdc++';
        }
        return [
            'cflags' => $cflags,
            'ldflags' => $ldflags,
            'libs' => $libs,
        ];
    }

    private function getIncludesString(): string
    {
        $base = BUILD_INCLUDE_PATH;
        $php_embed_includes = [
            "-I{$base}",
            "-I{$base}/php",
            "-I{$base}/php/main",
            "-I{$base}/php/TSRM",
            "-I{$base}/php/Zend",
            "-I{$base}/php/ext",
        ];
        return implode(' ', $php_embed_includes);
    }

    private function getLdflagsString(): string
    {
        return '-L' . BUILD_LIB_PATH;
    }

    private function getLibsString(array $libraries): string
    {
        $short_name = [];
        foreach (array_reverse($libraries) as $library) {
            $libs = Config::getLib($library, 'static-libs', []);
            foreach ($libs as $lib) {
                $short_name[] = $this->getShortLibName($lib);
            }
            if (PHP_OS_FAMILY !== 'Darwin') {
                continue;
            }
            foreach (Config::getLib($library, 'frameworks', []) as $fw) {
                $ks = '-framework ' . $fw;
                if (!in_array($ks, $short_name)) {
                    $short_name[] = $ks;
                }
            }
        }
        // patch: imagick (imagemagick wrapper) for linux needs -lgomp
        if (in_array('imagemagick', $libraries) && PHP_OS_FAMILY === 'Linux') {
            $short_name[] = '-lgomp';
        }
        return implode(' ', $short_name);
    }

    private function getShortLibName(string $lib): string
    {
        if (!str_starts_with($lib, 'lib') || !str_ends_with($lib, '.a')) {
            return BUILD_LIB_PATH . '/' . $lib;
        }
        // get short name
        return '-l' . substr($lib, 3, -2);
    }
}