<?php

namespace App\Scene;

use App\Service\Art;
use App\Service\Audio;
use App\Service\Fonts;
use JumPHP\Renderer\Renderer;
use JumPHP\Scene\AbstractScene;

/**
 * A menu of big buttons that works with the keyboard, a gamepad, the mouse and a finger.
 * items(): rows [label, value (callable or null), onPress (or null), onSide (fn(int $dir), or null)].
 */
abstract class MenuBase extends AbstractScene
{
    protected const BW = 200;
    protected const BH = 22;
    protected const STEP = 25;

    protected string $title = '';
    protected int $selected = 0;
    protected float $time = 0;
    /** @var array<int, array> */
    protected array $rows = [];

    public function __construct(protected Art $art, protected Fonts $fonts, protected Audio $audio)
    {
    }

    /** @return array<int, array> */
    abstract protected function items(): array;

    public function enter(array $params = []): void
    {
        $this->art->load($this->engine);
        $this->audio->load($this->sound());
        $this->art->effects->apply($this->engine);
        $this->rows = $this->items();
        $this->selected = 0;
        $this->time = 0;
    }

    public function resume(mixed $result = null): void
    {
        $this->rows = $this->items();
    }

    protected function back(): void
    {
    }

    protected function top(): float
    {
        return 135 - count($this->rows) * self::STEP / 2 + ($this->title !== '' ? 12 : 0);
    }

    /** @return array{0:float,1:float} */
    protected function rowXY(int $i): array
    {
        return [240 - self::BW / 2, $this->top() + $i * self::STEP];
    }

    public function update(float $dt): void
    {
        $this->time += $dt;
        $a = $this->actions();
        $n = count($this->rows);
        $m = $this->engine->input->getMouse();
        $over = null;
        for ($i = 0; $i < $n; $i++) {
            [$x, $y] = $this->rowXY($i);
            if ($m->x >= $x && $m->x < $x + self::BW && $m->y >= $y - 1 && $m->y < $y + self::BH + 1) {
                $over = $i;
            }
        }
        if ($m->isPressed(1) && $over !== null) {
            $this->selected = $over;
            [$x] = $this->rowXY($over);
            $this->activate($over, isset($this->rows[$over][3]) ? ($m->x < $x + self::BW / 2 ? -1 : 1) : 0);
            return;
        }
        if ($a->isPressed('down')) {
            $this->selected = ($this->selected + 1) % $n;
            $this->sound()->playSfx('menu_move');
        } elseif ($a->isPressed('up')) {
            $this->selected = ($this->selected + $n - 1) % $n;
            $this->sound()->playSfx('menu_move');
        } elseif ($a->isPressed('left') || $a->isPressed('right')) {
            if (isset($this->rows[$this->selected][3])) {
                $this->activate($this->selected, $a->isPressed('left') ? -1 : 1);
            }
        } elseif ($a->isPressed('confirm')) {
            $this->activate($this->selected, isset($this->rows[$this->selected][3]) ? 1 : 0);
        } elseif ($a->isPressed('back')) {
            $this->back();
        }
    }

    private function activate(int $i, int $dir): void
    {
        $row = $this->rows[$i];
        if ($dir !== 0 && isset($row[3])) {
            ($row[3])($dir);
            $this->sound()->playSfx('menu_move');
            $this->rows = $this->items();
        } elseif (isset($row[2])) {
            $this->sound()->playSfx('menu_confirm');
            ($row[2])();
        }
    }

    protected function renderBackground(Renderer $r): void
    {
        $r->fillRect(0, 0, 480, 270, [8, 4, 20, 170]);
    }

    protected function renderTitle(Renderer $r): void
    {
        if ($this->title !== '') {
            $this->fonts->text($this->engine, $r, $this->title, 240, $this->top() - 30, 2, [255, 210, 60], 'center');
        }
    }

    public function render(Renderer $r): void
    {
        $this->renderBackground($r);
        $this->renderTitle($r);
        $sdl = $this->sdl();
        foreach ($this->rows as $i => $row) {
            [$x, $y] = $this->rowXY($i);
            $on = $i === $this->selected;
            $this->art->draw($r, $on ? 'btn-wide-on' : 'btn-wide', null, $x, $y + ($on ? sin($this->time * 6) * 0.6 : 0));
            $label = \JumPHP\Util\Lang::t((string)$row[0]);
            if (isset($row[1])) {
                $value = is_callable($row[1]) ? ($row[1])() : $row[1];
                $this->fonts->print($this->engine, $r, $label, $x + 10, $y + 4, 1.1, [255, 255, 255], 'left', [20, 12, 40]);
                $this->fonts->print($this->engine, $r, '‹ ' . \JumPHP\Util\Lang::t((string)$value) . ' ›', $x + self::BW - 10, $y + 4, 1.1,
                    [255, 240, 170], 'right', [20, 12, 40]);
            } else {
                $this->fonts->print($this->engine, $r, $label, 240, $y + 4, 1.1, [255, 255, 255], 'center', [20, 12, 40]);
            }
        }
    }
}