<?php

namespace App\Actions\Projects;

use Illuminate\Support\Str;
use Ramsey\Uuid\Uuid;

class ProjectConfigurationIdentity
{
    /** @return array<string, string> */
    public static function relations(): array
    {
        return [
            'board_columns' => 'boardColumns', 'ticket_statuses' => 'ticketStatuses',
            'ticket_types' => 'ticketTypes', 'ticket_priorities' => 'ticketPriorities',
            'ticket_fields' => 'ticketFieldDefinitions', 'ticket_link_types' => 'ticketLinkTypes',
            'repository_connections' => 'repositoryConnections', 'notification_actions' => 'notificationActions',
        ];
    }

    /** @param array<string, mixed> $configuration @return array<string, mixed> */
    public function normalize(array $configuration): array
    {
        foreach (self::relations() as $area => $relation) {
            if (! array_key_exists($area, $configuration)) {
                continue;
            }
            foreach ($configuration[$area] as $index => &$item) {
                $item['configuration_key'] ??= (string) Uuid::uuid5(
                    Uuid::NAMESPACE_URL, 'kanbangit:'.$area.':'.$index.':'.$this->signature($area, $item),
                );
            }
            unset($item);
        }

        $columns = array_column($configuration['board_columns'] ?? [], 'configuration_key');
        foreach ($configuration['ticket_statuses'] ?? [] as $index => $status) {
            if (! array_key_exists('board_column_key', $status)) {
                $columnIndex = $status['board_column_index'] ?? null;
                $status['board_column_key'] = $columnIndex === null ? null : ($columns[$columnIndex] ?? null);
            }
            unset($status['board_column_index']);
            $configuration['ticket_statuses'][$index] = $status;
        }

        $statuses = array_column($configuration['ticket_statuses'] ?? [], 'configuration_key');
        foreach ($configuration['status_transitions'] ?? [] as $index => $transition) {
            if (array_key_exists('status_key', $transition)) {
                continue;
            }
            if (! isset($statuses[$index])) {
                continue;
            }
            $configuration['status_transitions'][$index] = [
                'status_key' => $statuses[$index],
                'target_keys' => array_values(array_filter(array_map(
                    static fn (int $target): ?string => $statuses[$target] ?? null, $transition,
                ))),
            ];
        }

        return $configuration;
    }

    /** @param array<string, mixed> $item */
    public function signature(string $area, array $item): string
    {
        return $area === 'repository_connections'
            ? ($item['provider'] ?? '').':'.($item['base_url'] ?? '').':'.($item['repository_full_name'] ?? '')
            : (string) ($item['name'] ?? $item['label'] ?? '');
    }

    /** @return array<string, mixed> */
    public function defaults(): array
    {
        $configuration = array_fill_keys(DuplicateProjectConfiguration::copyableAreas(), []);
        $configuration['project_settings'] = ['show_author' => true, 'show_story_points' => true];
        $configuration['ticket_statuses'] = [[
            'configuration_key' => (string) Str::uuid(), 'name' => 'Backlog',
            'position' => 1, 'board_column_key' => null,
        ]];
        $configuration['ticket_types'] = [
            ['configuration_key' => (string) Str::uuid(), 'name' => 'Task', 'position' => 1, 'is_parent' => false],
            ['configuration_key' => (string) Str::uuid(), 'name' => 'Release', 'position' => 2, 'is_parent' => true],
        ];
        $configuration['ticket_priorities'] = [[
            'configuration_key' => (string) Str::uuid(), 'name' => 'Medium', 'position' => 1,
        ]];
        $configuration['status_transitions'] = [[
            'status_key' => $configuration['ticket_statuses'][0]['configuration_key'], 'target_keys' => [],
        ]];

        return $configuration;
    }
}