<?php

namespace App\Http\Controllers;

use App\Actions\Permissions\PermissionService;
use App\Actions\Tickets\CreateTicketWorklogEntry;
use App\Enums\Permission;
use App\Enums\TicketWorklogEntryType;
use App\Http\Requests\MoveProjectTicketRequest;
use App\Http\Resources\BoardColumnResource;
use App\Http\Resources\ProjectResource;
use App\Models\Project;
use App\Models\Ticket;
use App\Models\TicketStatus;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Inertia\Inertia;
use Inertia\Response;

class ProjectBoardController extends Controller
{
    public function __construct(
        private readonly CreateTicketWorklogEntry $createTicketWorklogEntry,
        private readonly PermissionService $permissionService,
    ) {}

    public function index(Request $request, Project $project): Response
    {
        $user = $request->user();

        abort_unless(
            $this->permissionService->allows($user, Permission::ProjectRead, $project),
            403,
        );

        $canManageTickets = $this->permissionService->allows($user, Permission::ProjectWrite, $project);

        return Inertia::render('projects/Board', [
            'boardColumns' => BoardColumnResource::collection(
                $project->boardColumns()
                    ->with([
                        'ticketStatuses',
                        'tickets' => fn ($query) => $query
                            ->with([
                                'ticketPriority',
                                'ticketStatus.allowedTargetStatuses.boardColumn',
                                'ticketStatus.boardColumn',
                                'ticketType',
                            ]),
                    ])
                    ->get(),
            )->resolve(),
            'canCreateTickets' => $canManageTickets,
            'canEditTickets' => $canManageTickets,
            'project' => ProjectResource::make($project)->resolve(),
            'status' => session('status'),
        ]);
    }

    public function move(
        MoveProjectTicketRequest $request,
        Project $project,
        Ticket $ticket,
    ): RedirectResponse {
        $user = $request->user();

        abort_unless(
            $this->permissionService->allows($user, Permission::ProjectWrite, $project),
            403,
        );

        $validated = $request->validated();
        $ticketStatusId = (int) Arr::get($validated, 'ticket_status_id');
        $redirectRoute = Arr::get($validated, 'redirect_to') === 'backlog'
            ? 'projects.backlog.index'
            : 'projects.board.index';

        $destinationStatus = $project->ticketStatuses()
            ->with('boardColumn')
            ->findOrFail($ticketStatusId);

        $ticket->loadMissing('ticketStatus.boardColumn');

        $originStatusId = $ticket->ticket_status_id;
        $originLabel = $this->statusLabel($ticket->ticketStatus);
        $destinationLabel = $this->statusLabel($destinationStatus);

        if ($ticket->ticket_status_id === $ticketStatusId) {
            return to_route($redirectRoute, $project)
                ->with('status', "{$ticket->ticket_key} already belongs to {$destinationLabel}.");
        }

        $ticket->update([
            'ticket_status_id' => $destinationStatus->id,
        ]);

        $this->createTicketWorklogEntry->handle(
            $ticket->fresh(),
            $user,
            TicketWorklogEntryType::StatusChanged,
            "Moved from {$originLabel} to {$destinationLabel}.",
            [
                'from' => [
                    'label' => $originLabel,
                    'ticket_status_id' => $originStatusId,
                ],
                'to' => [
                    'label' => $destinationLabel,
                    'ticket_status_id' => $destinationStatus->id,
                ],
            ],
        );

        return to_route($redirectRoute, $project)
            ->with('status', "{$ticket->ticket_key} moved to {$destinationLabel}.");
    }

    private function statusLabel(?TicketStatus $ticketStatus): string
    {
        if ($ticketStatus === null) {
            return 'Unknown status';
        }

        if ($ticketStatus->boardColumn === null) {
            return $ticketStatus->name;
        }

        if ($ticketStatus->boardColumn->name === $ticketStatus->name) {
            return $ticketStatus->name;
        }

        return "{$ticketStatus->boardColumn->name} / {$ticketStatus->name}";
    }
}