<?php

namespace Spip\Autodoc\Stage;

use Spip\Autodoc\Context;
use Spip\Autodoc\Exception\ContextException;

/** Create index.html page with links of all available documentations */
class IndexStage implements StageInterface {
    public function __invoke(Context $context): Context
    {
        $context->add('stages', $this::class);
        $context->get('logger')->debug("Pass: ".$this::class);

        if (
            $context->directory->empty('output_base')
            or !is_dir($context->directory->output_base)
        ) {
            throw new ContextException(sprintf('Key "%s" needs to be a valid directory.', 'output_base_directory'));
        }

        $list = $this->load($context->directory->output_base);
        $sorted = $this->sort($list);
        dump($sorted);

        return $context;
    }

    /** @return array<string, stdClass> */
    public function load(string $output_base_directory): array {
        $list = [];
        $projects = glob($output_base_directory . '/*/autodoc.json');
        foreach ($projects as $project) {
            $dir = basename(dirname($project));
            $json = json_decode(file_get_contents($project));
            $list[$dir] = $json;
        }
        return $list;
    }

    /** @return array<string, stdClass> */
    public function sort(array $list): array {
        $groups = [];
        foreach ($list as $project) {
            $organization = basename(dirname($project->urls->repository ?: '')) ?: 'other';
            if ($organization === 'spip' and $project->prefix !== 'spip') {
                $organization = 'spip-core';
            }
            $groups[$organization][] = $project;
        }
        foreach ($groups as $organization => &$group) {
            usort($group, function ($a, $b) {
                return $a->title <=> $b->title;
            });
        }
        return $groups;
    }
}