<?php

namespace App\Actions\Projects;

use App\Models\Project;

class DuplicateProjectConfiguration
{
    public const COPY_PROJECT_SETTINGS = 'project_settings';

    public const COPY_BOARD_WORKFLOW = 'board_workflow';

    public const COPY_TICKET_TYPES = 'ticket_types';

    public const COPY_TICKET_PRIORITIES = 'ticket_priorities';

    public const COPY_TICKET_FIELDS = 'ticket_fields';

    public const COPY_TICKET_LINK_TYPES = 'ticket_link_types';

    public const COPY_REPOSITORY_CONNECTIONS = 'repository_connections';

    public const COPY_NOTIFICATION_ACTIONS = 'notification_actions';

    /**
     * @return list<string>
     */
    public static function copyableAreas(): array
    {
        return [
            self::COPY_PROJECT_SETTINGS,
            self::COPY_BOARD_WORKFLOW,
            self::COPY_TICKET_TYPES,
            self::COPY_TICKET_PRIORITIES,
            self::COPY_TICKET_FIELDS,
            self::COPY_TICKET_LINK_TYPES,
            self::COPY_REPOSITORY_CONNECTIONS,
            self::COPY_NOTIFICATION_ACTIONS,
        ];
    }

    /**
     * @return list<array{value: string, label: string, description: string}>
     */
    public static function copyAreaOptions(): array
    {
        return [
            [
                'value' => self::COPY_PROJECT_SETTINGS,
                'label' => 'Project settings',
                'description' => 'Copy general project preferences like story points and author visibility.',
            ],
            [
                'value' => self::COPY_BOARD_WORKFLOW,
                'label' => 'Board workflow',
                'description' => 'Copy board columns, ticket statuses, and allowed status transitions.',
            ],
            [
                'value' => self::COPY_TICKET_TYPES,
                'label' => 'Ticket types',
                'description' => 'Copy available ticket types, including parent-ticket types.',
            ],
            [
                'value' => self::COPY_TICKET_PRIORITIES,
                'label' => 'Ticket priorities',
                'description' => 'Copy the project-specific ticket priorities.',
            ],
            [
                'value' => self::COPY_TICKET_FIELDS,
                'label' => 'Custom ticket fields',
                'description' => 'Copy custom ticket field definitions without any ticket values.',
            ],
            [
                'value' => self::COPY_TICKET_LINK_TYPES,
                'label' => 'Ticket link types',
                'description' => 'Copy available relationship labels between tickets.',
            ],
            [
                'value' => self::COPY_REPOSITORY_CONNECTIONS,
                'label' => 'Repository connections',
                'description' => 'Copy linked repositories without changing the new project identity.',
            ],
            [
                'value' => self::COPY_NOTIFICATION_ACTIONS,
                'label' => 'Notification actions',
                'description' => 'Copy notification rules and delivery settings.',
            ],
        ];
    }

    /**
     * @param  list<string>  $copyAreas
     */
    public function handle(Project $sourceProject, Project $targetProject, array $copyAreas): void
    {
        $selectedAreas = array_values(array_intersect(self::copyableAreas(), array_unique($copyAreas)));

        if ($selectedAreas === []) {
            return;
        }

        $sourceProject->loadMissing([
            'boardColumns',
            'notificationActions',
            'repositoryConnections',
            'ticketFieldDefinitions',
            'ticketLinkTypes',
            'ticketPriorities',
            'ticketStatuses.allowedTargetStatuses',
            'ticketTypes',
        ]);

        if (in_array(self::COPY_PROJECT_SETTINGS, $selectedAreas, true)) {
            $targetProject->forceFill([
                'show_author' => $sourceProject->show_author,
                'show_story_points' => $sourceProject->show_story_points,
            ])->save();
        }

        if (in_array(self::COPY_BOARD_WORKFLOW, $selectedAreas, true)) {
            $targetProject->ticketStatuses()->delete();
            $targetProject->boardColumns()->delete();

            $boardColumnIdMap = [];

            foreach ($sourceProject->boardColumns as $boardColumn) {
                $newBoardColumn = $targetProject->boardColumns()->create([
                    'name' => $boardColumn->name,
                    'position' => $boardColumn->position,
                ]);

                $boardColumnIdMap[$boardColumn->id] = $newBoardColumn->id;
            }

            $ticketStatusIdMap = [];

            foreach ($sourceProject->ticketStatuses as $ticketStatus) {
                $newTicketStatus = $targetProject->ticketStatuses()->create([
                    'board_column_id' => $ticketStatus->board_column_id === null
                        ? null
                        : ($boardColumnIdMap[$ticketStatus->board_column_id] ?? null),
                    'name' => $ticketStatus->name,
                    'position' => $ticketStatus->position,
                ]);

                $ticketStatusIdMap[$ticketStatus->id] = $newTicketStatus->id;
            }

            foreach ($sourceProject->ticketStatuses as $ticketStatus) {
                $newTicketStatusId = $ticketStatusIdMap[$ticketStatus->id] ?? null;

                if ($newTicketStatusId === null) {
                    continue;
                }

                $targetProject->ticketStatuses()
                    ->findOrFail($newTicketStatusId)
                    ->allowedTargetStatuses()
                    ->sync(
                        $ticketStatus->allowedTargetStatuses
                            ->pluck('id')
                            ->map(fn (int $statusId): ?int => $ticketStatusIdMap[$statusId] ?? null)
                            ->filter()
                            ->values()
                            ->all(),
                    );
            }
        }

        if (in_array(self::COPY_TICKET_TYPES, $selectedAreas, true)) {
            $targetProject->ticketTypes()->delete();

            foreach ($sourceProject->ticketTypes as $ticketType) {
                $targetProject->ticketTypes()->create([
                    'name' => $ticketType->name,
                    'position' => $ticketType->position,
                    'is_parent' => $ticketType->is_parent,
                ]);
            }
        }

        if (in_array(self::COPY_TICKET_PRIORITIES, $selectedAreas, true)) {
            $targetProject->ticketPriorities()->delete();

            foreach ($sourceProject->ticketPriorities as $ticketPriority) {
                $targetProject->ticketPriorities()->create([
                    'name' => $ticketPriority->name,
                    'position' => $ticketPriority->position,
                ]);
            }
        }

        if (in_array(self::COPY_TICKET_FIELDS, $selectedAreas, true)) {
            $targetProject->ticketFieldDefinitions()->delete();

            foreach ($sourceProject->ticketFieldDefinitions as $ticketFieldDefinition) {
                $targetProject->ticketFieldDefinitions()->create([
                    'field_type' => $ticketFieldDefinition->field_type,
                    'label' => $ticketFieldDefinition->label,
                    'position' => $ticketFieldDefinition->position,
                ]);
            }
        }

        if (in_array(self::COPY_TICKET_LINK_TYPES, $selectedAreas, true)) {
            $targetProject->ticketLinkTypes()->delete();

            foreach ($sourceProject->ticketLinkTypes as $ticketLinkType) {
                $targetProject->ticketLinkTypes()->create([
                    'label' => $ticketLinkType->label,
                    'counterpart_label' => $ticketLinkType->counterpart_label,
                    'position' => $ticketLinkType->position,
                ]);
            }
        }

        if (in_array(self::COPY_REPOSITORY_CONNECTIONS, $selectedAreas, true)) {
            $targetProject->repositoryConnections()->delete();

            foreach ($sourceProject->repositoryConnections as $repositoryConnection) {
                $targetProject->repositoryConnections()->create([
                    'provider' => $repositoryConnection->provider,
                    'base_url' => $repositoryConnection->base_url,
                    'provider_repository_id' => $repositoryConnection->provider_repository_id,
                    'owner_name' => $repositoryConnection->owner_name,
                    'repository_name' => $repositoryConnection->repository_name,
                    'repository_full_name' => $repositoryConnection->repository_full_name,
                    'repository_url' => $repositoryConnection->repository_url,
                ]);
            }
        }

        if (in_array(self::COPY_NOTIFICATION_ACTIONS, $selectedAreas, true)) {
            $targetProject->notificationActions()->delete();

            foreach ($sourceProject->notificationActions as $notificationAction) {
                $targetProject->notificationActions()->create([
                    'name' => $notificationAction->name,
                    'enabled' => $notificationAction->enabled,
                    'event_type' => $notificationAction->event_type,
                    'channel' => $notificationAction->channel,
                    'channel_configuration' => $notificationAction->channel_configuration,
                    'message_template' => $notificationAction->message_template,
                    'delivery_url' => $notificationAction->delivery_url,
                    'filters' => $notificationAction->filters,
                ]);
            }
        }
    }
}