<?php

namespace Gregwar\Image\Adapter;

use Gregwar\Image\Image;
use Gregwar\Image\Source\Source;

/**
 * all the functions / methods to work on images.
 *
 * if changing anything please also add it to \Gregwar\Image\Image
 *
 * @author wodka <michael.schramm@gmail.com>
 */
interface AdapterInterface
{
    /**
     * set the image source for the adapter.
     *
     * @param Source $source
     *
     * @return $this
     */
    public function setSource(Source $source);

    /**
     * get the raw resource.
     *
     * @return resource
     */
    public function getResource();

    /**
     * Gets the name of the adapter.
     *
     * @return string
     */
    public function getName();

    /**
     * Image width.
     *
     * @return int
     */
    public function width();

    /**
     * Image height.
     *
     * @return int
     */
    public function height();

    /**
     * Init the resource.
     *
     * @return $this
     */
    public function init();

    /**
     * Unload the resource
     */
    public function deinit();

    /**
     * Save the image as a gif.
     *
     * @return $this
     */
    public function saveGif($file);

    /**
     * Save the image as a png.
     *
     * @return $this
     */
    public function savePng($file);

    /**
     * Save the image as a jpeg.
     *
     * @return $this
     */
    public function saveJpeg($file, $quality);

    /**
     * Works as resize() excepts that the layout will be cropped.
     *
     * @param int $width      the width
     * @param int $height     the height
     * @param int $background the background
     *
     * @return $this
     */
    public function cropResize($width = null, $height = null, $background = 0xffffff);

    /**
     * Resize the image preserving scale. Can enlarge it.
     *
     * @param int  $width      the width
     * @param int  $height     the height
     * @param int  $background the background
     * @param bool $crop
     *
     * @return $this
     */
    public function scaleResize($width = null, $height = null, $background = 0xffffff, $crop = false);

    /**
     * Resizes the image. It will never be enlarged.
     *
     * @param int  $width      the width
     * @param int  $height     the height
     * @param int  $background the background
     * @param bool $force
     * @param bool $rescale
     * @param bool $crop
     *
     * @return $this
     */
    public function resize($width = null, $height = null, $background = 0xffffff, $force = false, $rescale = false, $crop = false);

    /**
     * Crops the image.
     *
     * @param int $x      the top-left x position of the crop box
     * @param int $y      the top-left y position of the crop box
     * @param int $width  the width of the crop box
     * @param int $height the height of the crop box
     *
     * @return $this
     */
    public function crop($x, $y, $width, $height);

    /**
     * enable progressive image loading.
     *
     * @return $this
     */
    public function enableProgressive();

    /**
     * Resizes the image forcing the destination to have exactly the
     * given width and the height.
     *
     * @param int $width      the width
     * @param int $height     the height
     * @param int $background the background
     *
     * @return $this
     */
    public function forceResize($width = null, $height = null, $background = 0xffffff);

    /**
     * Perform a zoom crop of the image to desired width and height.
     *
     * @param int $width      Desired width
     * @param int $height     Desired height
     * @param int $background
     *
     * @return $this
     */
    public function zoomCrop($width, $height, $background = 0xffffff);

    /**
     * Fills the image background to $bg if the image is transparent.
     *
     * @param int $background background color
     *
     * @return $this
     */
    public function fillBackground($background = 0xffffff);

    /**
     * Negates the image.
     *
     * @return $this
     */
    public function negate();

    /**
     * Changes the brightness of the image.
     *
     * @param int $brightness the brightness
     *
     * @return $this
     */
    public function brightness($brightness);

    /**
     * Contrasts the image.
     *
     * @param int $contrast the contrast [-100, 100]
     *
     * @return $this
     */
    public function contrast($contrast);

    /**
     * Apply a grayscale level effect on the image.
     *
     * @return $this
     */
    public function grayscale();

    /**
     * Emboss the image.
     *
     * @return $this
     */
    public function emboss();

    /**
     * Smooth the image.
     *
     * @param int $p value between [-10,10]
     *
     * @return $this
     */
    public function smooth($p);

    /**
     * Sharps the image.
     *
     * @return $this
     */
    public function sharp();

    /**
     * Edges the image.
     *
     * @return $this
     */
    public function edge();

    /**
     * Colorize the image.
     *
     * @param int $red   value in range [-255, 255]
     * @param int $green value in range [-255, 255]
     * @param int $blue  value in range [-255, 255]
     *
     * @return $this
     */
    public function colorize($red, $green, $blue);

    /**
     * apply sepia to the image.
     *
     * @return $this
     */
    public function sepia();

    /**
     * Merge with another image.
     *
     * @param Image $other
     * @param int   $x
     * @param int   $y
     * @param int   $width
     * @param int   $height
     *
     * @return $this
     */
    public function merge(Image $other, $x = 0, $y = 0, $width = null, $height = null);

    /**
     * Rotate the image.
     *
     * @param float $angle
     * @param int   $background
     *
     * @return $this
     */
    public function rotate($angle, $background = 0xffffff);

    /**
     * Fills the image.
     *
     * @param int $color
     * @param int $x
     * @param int $y
     *
     * @return $this
     */
    public function fill($color = 0xffffff, $x = 0, $y = 0);

    /**
     * write text to the image.
     *
     * @param string $font
     * @param string $text
     * @param int    $x
     * @param int    $y
     * @param int    $size
     * @param int    $angle
     * @param int    $color
     * @param string $align
     */
    public function write($font, $text, $x = 0, $y = 0, $size = 12, $angle = 0, $color = 0x000000, $align = 'left');

    /**
     * Draws a rectangle.
     *
     * @param int  $x1
     * @param int  $y1
     * @param int  $x2
     * @param int  $y2
     * @param int  $color
     * @param bool $filled
     *
     * @return $this
     */
    public function rectangle($x1, $y1, $x2, $y2, $color, $filled = false);

    /**
     * Draws a rounded rectangle.
     *
     * @param int  $x1
     * @param int  $y1
     * @param int  $x2
     * @param int  $y2
     * @param int  $radius
     * @param int  $color
     * @param bool $filled
     *
     * @return $this
     */
    public function roundedRectangle($x1, $y1, $x2, $y2, $radius, $color, $filled = false);

    /**
     * Draws a line.
     *
     * @param int $x1
     * @param int $y1
     * @param int $x2
     * @param int $y2
     * @param int $color
     *
     * @return $this
     */
    public function line($x1, $y1, $x2, $y2, $color = 0x000000);

    /**
     * Draws an ellipse.
     *
     * @param int  $cx
     * @param int  $cy
     * @param int  $width
     * @param int  $height
     * @param int  $color
     * @param bool $filled
     *
     * @return $this
     */
    public function ellipse($cx, $cy, $width, $height, $color = 0x000000, $filled = false);

    /**
     * Draws a circle.
     *
     * @param int  $cx
     * @param int  $cy
     * @param int  $r
     * @param int  $color
     * @param bool $filled
     *
     * @return $this
     */
    public function circle($cx, $cy, $r, $color = 0x000000, $filled = false);

    /**
     * Draws a polygon.
     *
     * @param array $points
     * @param int   $color
     * @param bool  $filled
     *
     * @return $this
     */
    public function polygon(array $points, $color, $filled = false);

    /**
     * Flips the image.
     * 
     * @param int $flipVertical
     * @param int $flipHorizontal
     * 
     * @return $this
     */
    public function flip($flipVertical, $flipHorizontal);
}