<?php

namespace Danjones\FFMpeg;

use FFMpeg\Format\FormatInterface;

class Stream
{
    use Traits\HasMetadata;

    protected Map $map;
    protected FormatInterface $codec;
    protected string $input = '0:0';
    protected array $flags = [];

    public function __construct(Map $map)
    {
        $this->map = $map;
    }

    public function setInput(string $input): static
    {
        $this->input = $input;

        return $this;
    }

    public function addFlag(string $key, string $value): static
    {
        $this->flags[$key] = $value;

        return $this;
    }

    public function setCodec(FormatInterface $codec): static
    {
        $this->codec = $codec;

        return $this;
    }

    protected function parseCodec(): static
    {
        // @todo
        $this->addFlag('c', 'libx265');

        return $this;
    }

    public function saveStream(): Map
    {
        $this->map->saveStream($this);

        return $this->map;
    }

    public function buildCommand(int $idx = 0): array
    {
        $this->parseCodec();

        $commands = [];

        $commands[] = '-map';
        $commands[] = $this->input;

        foreach ($this->flags as $k => $v) {
            array_push($commands, "-{$k}:{$idx}", $v);
        }

        foreach ($this->metadata as $k => $v) {
            array_push($commands, "-metadata:s:{$idx}", "{$k}={$v}");
        }

        return $commands;
    }
}