<?php

namespace App\Model;

use DB;
use Illuminate\Database\Eloquent\Model;

class Photo extends Model
{
	protected $table = 'photo';

	// Imagick Object
	private $_io;

	// How should the image be rotated, based on the value of orientation
	private $_rotate = [
		3=>180,
		6=>90,
		8=>-90,
	];

	/**
	 * Determine the new name for the image
	 */
	public function file_path($short=FALSE,$new=FALSE) {
		$file = $this->filename;

		if ($new)
			$file = sprintf('%s.%s',((is_null($this->date_taken) OR ! $this->date_taken)
				? sprintf('UNKNOWN/%07s',$this->file_path_id())
				: sprintf('%s_%03s',date('Y/m/d-His',$this->date_taken),$this->subsectime).($this->subsectime ? '' : sprintf('-%05s',$this->id))),$this->type());

		return (($short OR preg_match('/^\//',$file)) ? '' : config('photo.dir').DIRECTORY_SEPARATOR).$file;
	}

	public function gps(array $coordinate,$hemisphere) {
		if (! $coordinate OR ! $hemisphere)
			return NULL;

		for ($i=0; $i<3; $i++) {
			$part = explode('/', $coordinate[$i]);

			if (count($part) == 1)
				$coordinate[$i] = $part[0];

			elseif (count($part) == 2)
				$coordinate[$i] = floatval($part[0])/floatval($part[1]);

			else
				$coordinate[$i] = 0;
		}

		list($degrees, $minutes, $seconds) = $coordinate;

		$sign = ($hemisphere == 'W' || $hemisphere == 'S') ? -1 : 1;

		return round($sign*($degrees+$minutes/60+$seconds/3600),$degrees > 100 ? 3 : 4);
	}

	/**
	 * Return an Imagick object or attribute
	 *
	 */
	public function io($attr=NULL) {
		if (is_null($this->_io))
			$this->_io = new \Imagick($this->file_path());

		return is_null($attr) ? $this->_io : $this->_io->getImageProperty($attr);
	}

	/**
	 * Rotate the image
	 *
	 */
	private function rotate(\Imagick $imo)
	{
		if (array_key_exists($this->orientation,$this->_rotate))
			$imo->rotateImage(new \ImagickPixel('none'),$this->_rotate[$this->orientation]);

		return $imo->getImageBlob();
	}

	/**
	 * Return the image's thumbnail
	 *
	 */
	public function thumbnail($rotate=TRUE)
	{
		if (! $this->thumbnail)
			return NULL;

		if (! $rotate OR ! array_key_exists($this->orientation,$this->_rotate) OR ! extension_loaded('imagick'))
			return $this->thumbnail;

		$imo = new \Imagick();
		$imo->readImageBlob($this->thumbnail);

		return $this->rotate($imo);
	}

	public function list_duplicate() {
		$po = DB::table('photo');

		if ($this->id)
			$po->where('id','!=',$this->id);

		// Ignore photo's pending removal.
		$po->where(function($query) {
			$query->where('remove','!=',TRUE)
				->orWhere('remove','=',NULL);
		});

		// Where the signature is the same
		$po->where(function($query) {
			$query->where('signature','=',$this->signature);

			// Or they have the same time taken with the same camera
			if ($this->date_taken AND ($this->model OR $this->make)) {
				$query->orWhere(function($query) {
					$query->where('date_taken','=',$this->date_taken ? $this->date_taken : NULL);
					$query->where('subsectime','=',$this->subsectime ? $this->subsectime : NULL);

					if (! is_null($this->model))
						$query->where('model','=',$this->model);

					if (! is_null($this->make))
						$query->where('make','=',$this->make);

				});
			}
		});

		return $po;
	}
}