<?php

namespace App\Entity;

use App\Repository\CombatantRepository;
use Doctrine\DBAL\Types\Types;
use Doctrine\ORM\Mapping as ORM;

/**
 * One line on the running combat HP tracker. Stats are copied from the Enemy
 * when added, so editing the Enemy mid-fight doesn't change the tracker.
 */
#[ORM\Entity(repositoryClass: CombatantRepository::class)]
#[ORM\Table(name: 'combatant')]
class Combatant
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\ManyToOne(targetEntity: Encounter::class, inversedBy: 'combatants')]
    #[ORM\JoinColumn(name: 'encounter_id', nullable: false, onDelete: 'CASCADE')]
    private ?Encounter $encounter = null;

    #[ORM\ManyToOne(targetEntity: Enemy::class)]
    #[ORM\JoinColumn(name: 'enemy_id', onDelete: 'SET NULL', nullable: true)]
    private ?Enemy $enemy = null;

    #[ORM\Column(length: 120)]
    private string $label = '';

    #[ORM\Column(type: Types::SMALLINT)]
    private int $armorClass = 10;

    #[ORM\Column(type: Types::SMALLINT)]
    private int $maxHp = 1;

    #[ORM\Column(type: Types::SMALLINT)]
    private int $currentHp = 1;

    #[ORM\Column(type: Types::SMALLINT)]
    private int $position = 0;

    #[ORM\Column(type: Types::DATETIME_IMMUTABLE)]
    private \DateTimeImmutable $addedAt;

    public function __construct()
    {
        $this->addedAt = new \DateTimeImmutable();
    }

    public function isDown(): bool
    {
        return $this->currentHp <= 0;
    }

    /** 0-100, for the HP bar. */
    public function hpPercent(): int
    {
        if ($this->maxHp <= 0) {
            return 0;
        }

        return (int) round(max(0, min($this->currentHp, $this->maxHp)) / $this->maxHp * 100);
    }

    public function applyDamage(int $amount): void
    {
        $this->currentHp = max(0, $this->currentHp - abs($amount));
    }

    public function applyHealing(int $amount): void
    {
        $this->currentHp = min($this->maxHp, $this->currentHp + abs($amount));
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getEncounter(): ?Encounter
    {
        return $this->encounter;
    }

    public function setEncounter(?Encounter $encounter): static
    {
        $this->encounter = $encounter;

        return $this;
    }

    public function getEnemy(): ?Enemy
    {
        return $this->enemy;
    }

    public function setEnemy(?Enemy $enemy): static
    {
        $this->enemy = $enemy;

        return $this;
    }

    public function getLabel(): string
    {
        return $this->label;
    }

    public function setLabel(string $label): static
    {
        $this->label = $label;

        return $this;
    }

    public function getArmorClass(): int
    {
        return $this->armorClass;
    }

    public function setArmorClass(int $armorClass): static
    {
        $this->armorClass = $armorClass;

        return $this;
    }

    public function getMaxHp(): int
    {
        return $this->maxHp;
    }

    public function setMaxHp(int $maxHp): static
    {
        $this->maxHp = $maxHp;

        return $this;
    }

    public function getCurrentHp(): int
    {
        return $this->currentHp;
    }

    public function setCurrentHp(int $currentHp): static
    {
        $this->currentHp = $currentHp;

        return $this;
    }

    public function getPosition(): int
    {
        return $this->position;
    }

    public function setPosition(int $position): static
    {
        $this->position = $position;

        return $this;
    }

    public function getAddedAt(): \DateTimeImmutable
    {
        return $this->addedAt;
    }
}