<?php

namespace App\Actions\Tickets;

use App\Actions\Git\Data\GitBranch;
use App\Actions\Git\GitProviderManager;
use App\Actions\Git\ValidateGitBranchName;
use App\Models\Project;
use App\Models\RepositoryConnection;
use App\Models\Ticket;
use App\Models\User;
use App\Models\UserGitConnection;
use Illuminate\Support\Arr;
use Throwable;

class ValidateProjectTicketBranch
{
    public function __construct(
        private readonly GitProviderManager $gitProviderManager,
        private readonly ValidateGitBranchName $validateGitBranchName,
    ) {}

    /**
     * @param  array{branch_name: string, repository_connection_id: int}  $validated
     * @return array{is_valid: bool, message: string}
     */
    public function handle(Project $project, Ticket $ticket, User $user, array $validated): array
    {
        $repositoryConnectionId = (int) Arr::get($validated, 'repository_connection_id');
        $branchName = trim((string) Arr::get($validated, 'branch_name'));

        $repositoryConnection = $this->projectRepositoryConnection($project, $repositoryConnectionId);
        $userGitConnection = $this->matchingUserGitConnection($user->id, $repositoryConnection);

        if ($userGitConnection === null) {
            return [
                'is_valid' => false,
                'message' => 'Connect a matching Git connection in your user settings first.',
            ];
        }

        $syntaxMessage = $this->validateGitBranchName->message($branchName);

        if ($syntaxMessage !== null) {
            return [
                'is_valid' => false,
                'message' => $syntaxMessage,
            ];
        }

        try {
            $branchAlreadyExists = collect(
                $this->gitProviderManager
                    ->client($userGitConnection->provider)
                    ->listBranches(
                        $userGitConnection->api_token,
                        $repositoryConnection->toGitRepository(),
                    ),
            )
                ->contains(
                    fn (GitBranch $branch): bool => $branch->name === $branchName,
                );
        } catch (Throwable) {
            return [
                'is_valid' => false,
                'message' => sprintf('%s could not validate this branch name right now.', config('app.name')),
            ];
        }

        if ($branchAlreadyExists) {
            return [
                'is_valid' => false,
                'message' => 'This branch name already exists in the selected repository.',
            ];
        }

        return [
            'is_valid' => true,
            'message' => "Branch name is available for {$ticket->ticket_key}.",
        ];
    }

    private function projectRepositoryConnection(Project $project, int $repositoryConnectionId): RepositoryConnection
    {
        return $project->repositoryConnections()
            ->findOrFail($repositoryConnectionId);
    }

    private function matchingUserGitConnection(
        int $userId,
        RepositoryConnection $repositoryConnection,
    ): ?UserGitConnection {
        return UserGitConnection::query()
            ->where('user_id', $userId)
            ->where('provider', $repositoryConnection->provider)
            ->where('base_url', $repositoryConnection->base_url)
            ->first();
    }
}