/**
 * @description Takes care of every action a photo can handle and execute.
 * @copyright   2015 by Tobias Reich
 */

photo = {

	json  : null,
	cache : null

}

photo.getID = function() {

	let id = null

	if (photo.json) id = photo.json.id
	else            id = $('.photo:hover, .photo.active').attr('data-id')

	if ($.isNumeric(id)===true) return id
	else                        return false

}

photo.load = function(photoID, albumID) {

	let params = {
		photoID,
		albumID,
		password: password.value
	}

	api.post('Photo::get', params, function(data) {

		const checkPasswd = function() {
			if (password.value!=='') photo.load(photoID, albumID)
			else                     setTimeout(checkPasswd, 250)
		}

		if (data==='Warning: Photo private!') {
			lychee.content.show()
			lychee.goto('')
			return false
		}

		if (data==='Warning: Wrong password!') {
			checkPasswd()
			return false
		}

		photo.json = data

		if (!visible.photo()) view.photo.show()
		view.photo.init()
		lychee.imageview.show()

		setTimeout(() => {
			lychee.content.show()
			//photo.preloadNext(photoID, albumID);
		}, 300)

	})

}

// Preload the next photo for better response time
photo.preloadNext = function(photoID) {

	// Never preload on mobile devices with bare RAM and
	// mostly mobile internet
	// {{ code }}

	if (album.json &&
	   album.json.content &&
	   album.json.content[photoID] &&
	   album.json.content[photoID].nextPhoto!='') {

		let nextPhoto = album.json.content[photoID].nextPhoto,
		    url       = album.json.content[nextPhoto].url

		photo.cache        = new Image()
		photo.cache.src    = url
		photo.cache.onload = () => photo.cache = null

	}

}

photo.parse = function() {

	if (!photo.json.title) photo.json.title = 'Untitled'

}

photo.previous = function(animate) {

	if (photo.getID()!==false &&
	   album.json &&
	   album.json.content[photo.getID()] &&
	   album.json.content[photo.getID()].previousPhoto!=='') {

		let delay = 0

		if (animate===true) {

			delay = 200

			$('#image').css({
				WebkitTransform : 'translateX(100%)',
				MozTransform    : 'translateX(100%)',
				transform       : 'translateX(100%)',
				opacity         : 0
			})

		}

		setTimeout(() => {
			if (photo.getID()===false) return false
			lychee.goto(album.getID() + '/' + album.json.content[photo.getID()].previousPhoto)
		}, delay)

	}

}

photo.next = function(animate) {

	if (photo.getID()!==false &&
	   album.json &&
	   album.json.content[photo.getID()] &&
	   album.json.content[photo.getID()].nextPhoto!=='') {

		let delay = 0

		if (animate===true) {

			delay = 200

			$('#image').css({
				WebkitTransform : 'translateX(-100%)',
				MozTransform    : 'translateX(-100%)',
				transform       : 'translateX(-100%)',
				opacity         : 0
			})

		}

		setTimeout(() => {
			if (photo.getID()===false) return false
			lychee.goto(album.getID() + '/' + album.json.content[photo.getID()].nextPhoto)
		}, delay)

	}

}

photo.duplicate = function(photoIDs) {

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	albums.refresh()

	let params = {
		photoIDs: photoIDs.join()
	}

	api.post('Photo::duplicate', params, function(data) {

		if (data!==true) lychee.error(null, params, data)
		else             album.load(album.getID())

	})

}

photo.delete = function(photoIDs) {

	let action     = {},
	    cancel     = {},
	    msg        = '',
	    photoTitle = ''

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	if (photoIDs.length===1) {

		// Get title if only one photo is selected
		if (visible.photo()) photoTitle = photo.json.title
		else                 photoTitle = album.json.content[photoIDs].title

		// Fallback for photos without a title
		if (photoTitle==='') photoTitle = 'Untitled'

	}

	action.fn = function() {

		let nextPhoto,
			previousPhoto

		basicModal.close()

		photoIDs.forEach(function(id, index, array) {

			// Change reference for the next and previous photo
			if (album.json.content[id].nextPhoto!=='' || album.json.content[id].previousPhoto!=='') {

				nextPhoto     = album.json.content[id].nextPhoto
				previousPhoto = album.json.content[id].previousPhoto

				album.json.content[previousPhoto].nextPhoto = nextPhoto
				album.json.content[nextPhoto].previousPhoto = previousPhoto

			}

			delete album.json.content[id]
			view.album.content.delete(id)

		})

		albums.refresh()

		// Go to next photo if there is a next photo and
		// next photo is not the current one. Show album otherwise.
		if (visible.photo() && nextPhoto!=='' && nextPhoto!==photo.getID()) lychee.goto(album.getID() + '/' + nextPhoto)
		else if (!visible.albums())                                         lychee.goto(album.getID())

		let params = {
			photoIDs: photoIDs.join()
		}

		api.post('Photo::delete', params, function(data) {

			if (data!==true) lychee.error(null, params, data)

		})

	}

	if (photoIDs.length===1) {

		action.title = 'Delete Photo'
		cancel.title = 'Keep Photo'

		msg = `<p>Are you sure you want to delete the photo '${ photoTitle }'? This action can't be undone!</p>`

	} else {

		action.title = 'Delete Photo'
		cancel.title = 'Keep Photo'

		msg = `<p>Are you sure you want to delete all ${ photoIDs.length } selected photo? This action can't be undone!</p>`

	}

	basicModal.show({
		body: msg,
		buttons: {
			action: {
				title: action.title,
				fn: action.fn,
				class: 'red'
			},
			cancel: {
				title: cancel.title,
				fn: basicModal.close
			}
		}
	})

}

photo.setTitle = function(photoIDs) {

	let oldTitle = '',
	    msg      = ''

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	if (photoIDs.length===1) {

		// Get old title if only one photo is selected
		if (photo.json)      oldTitle = photo.json.title
		else if (album.json) oldTitle = album.json.content[photoIDs].title
		oldTitle = oldTitle.replace(/'/g, '&apos;')

	}

	const action = function(data) {

		basicModal.close()

		let newTitle = data.title

		// Remove html from input
		newTitle = lychee.removeHTML(newTitle)

		if (visible.photo()) {
			photo.json.title = (newTitle==='' ? 'Untitled' : newTitle)
			view.photo.title()
		}

		photoIDs.forEach(function(id, index, array) {
			album.json.content[id].title = newTitle
			view.album.content.title(id)
		})

		let params = {
			photoIDs: photoIDs.join(),
			title: newTitle
		}

		api.post('Photo::setTitle', params, function(data) {

			if (data!==true) lychee.error(null, params, data)

		})

	}

	let input = `<input class='text' name='title' type='text' maxlength='50' placeholder='Title' value='${ oldTitle }'>`

	if (photoIDs.length===1) msg = `<p>Enter a new title for this photo: ${ input }</p>`
	else                     msg = `<p>Enter a title for all ${ photoIDs.length } selected photos: ${ input }</p>`

	basicModal.show({
		body: msg,
		buttons: {
			action: {
				title: 'Set title',
				fn: action
			},
			cancel: {
				title: 'Cancel',
				fn: basicModal.close
			}
		}
	})

}

photo.setAlbum = function(photoIDs, albumID) {

	let nextPhoto,
		previousPhoto

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	if (visible.photo) lychee.goto(album.getID())

	photoIDs.forEach(function(id, index, array) {

		// Change reference for the next and previous photo
		if (album.json.content[id].nextPhoto!==''||album.json.content[id].previousPhoto!=='') {

			nextPhoto     = album.json.content[id].nextPhoto
			previousPhoto = album.json.content[id].previousPhoto

			album.json.content[previousPhoto].nextPhoto = nextPhoto
			album.json.content[nextPhoto].previousPhoto = previousPhoto

		}

		album.json.content[id] = null
		view.album.content.delete(id)

	})

	albums.refresh()

	let params = {
		photoIDs: photoIDs.join(),
		albumID
	}

	api.post('Photo::setAlbum', params, function(data) {

		if (data!==true) lychee.error(null, params, data)

	})

}

photo.setStar = function(photoIDs) {

	if (!photoIDs) return false

	if (visible.photo()) {
		photo.json.star = (photo.json.star==='0' ? '1' : '0')
		view.photo.star()
	}

	photoIDs.forEach(function(id, index, array) {
		album.json.content[id].star = (album.json.content[id].star==='0' ? '1' : '0')
		view.album.content.star(id)
	})

	albums.refresh()

	let params = {
		photoIDs: photoIDs.join()
	}

	api.post('Photo::setStar', params, function(data) {

		if (data!==true) lychee.error(null, params, data)

	})

}

photo.setPublic = function(photoID, e) {

	if (photo.json.public==='2') {

		const action = function() {

			basicModal.close()
			lychee.goto(photo.json.original_album)

		}

		basicModal.show({
			body: "<p>This photo is located in a public album. To make this photo private or public, edit the visibility of the associated album.</p>",
			buttons: {
				action: {
					title: 'Show Album',
					fn: action
				},
				cancel: {
					title: 'Cancel',
					fn: basicModal.close
				}
			}
		})

		return false

	}

	if (visible.photo()) {

		photo.json.public = (photo.json.public==='0' ? '1' : '0')
		view.photo.public()
		if (photo.json.public==='1') contextMenu.sharePhoto(photoID, e)

	}

	album.json.content[photoID].public = (album.json.content[photoID].public==='0' ? '1' : '0')
	view.album.content.public(photoID)

	albums.refresh()

	api.post('Photo::setPublic', { photoID }, function(data) {

		if (data!==true) lychee.error(null, params, data)

	})

}

photo.setDescription = function(photoID) {

	let oldDescription = photo.json.description.replace(/'/g, '&apos;')

	const action = function(data) {

		basicModal.close()

		let description = data.description

		// Remove html from input
		description = lychee.removeHTML(description)

		if (visible.photo()) {
			photo.json.description = description
			view.photo.description()
		}

		let params = {
			photoID,
			description
		}

		api.post('Photo::setDescription', params, function(data) {

			if (data!==true) lychee.error(null, params, data)

		})

	}

	basicModal.show({
		body: `<p>Enter a description for this photo: <input class='text' name='description' type='text' maxlength='800' placeholder='Description' value='${ oldDescription }'></p>`,
		buttons: {
			action: {
				title: 'Set Description',
				fn: action
			},
			cancel: {
				title: 'Cancel',
				fn: basicModal.close
			}
		}
	})

}

photo.editTags = function(photoIDs) {

	let oldTags = '',
	    msg     = ''

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	// Get tags
	if (visible.photo())                              oldTags = photo.json.tags
	else if (visible.album() && photoIDs.length===1)  oldTags = album.json.content[photoIDs].tags
	else if (visible.search() && photoIDs.length===1) oldTags = album.json.content[photoIDs].tags
	else if (visible.album() && photoIDs.length>1) {
		let same = true
		photoIDs.forEach(function(id, index, array) {
			if (album.json.content[id].tags===album.json.content[photoIDs[0]].tags && same===true) same = true
			else                                                                                   same = false
		})
		if (same===true) oldTags = album.json.content[photoIDs[0]].tags
	}

	// Improve tags
	oldTags = oldTags.replace(/,/g, ', ')

	const action = function(data) {

		basicModal.close()
		photo.setTags(photoIDs, data.tags)

	}

	let input = `<input class='text' name='tags' type='text' maxlength='800' placeholder='Tags' value='${ oldTags }'>`

	if (photoIDs.length===1) msg = `<p>Enter your tags for this photo. You can add multiple tags by separating them with a comma: ${ input }</p>`
	else                     msg = `<p>Enter your tags for all ${ photoIDs.length } selected photos. Existing tags will be overwritten. You can add multiple tags by separating them with a comma: ${ input }</p>`

	basicModal.show({
		body: msg,
		buttons: {
			action: {
				title: 'Set Tags',
				fn: action
			},
			cancel: {
				title: 'Cancel',
				fn: basicModal.close
			}
		}
	})

}

photo.setTags = function(photoIDs, tags) {

	if (!photoIDs) return false
	if (photoIDs instanceof Array===false) photoIDs = [photoIDs]

	// Parse tags
	tags = tags.replace(/(\ ,\ )|(\ ,)|(,\ )|(,{1,}\ {0,})|(,$|^,)/g, ',')
	tags = tags.replace(/,$|^,|(\ ){0,}$/g, '')

	// Remove html from input
	tags = lychee.removeHTML(tags)

	if (visible.photo()) {
		photo.json.tags = tags
		view.photo.tags()
	}

	photoIDs.forEach(function(id, index, array) {
		album.json.content[id].tags = tags
	})

	let params = {
		photoIDs: photoIDs.join(),
		tags
	}

	api.post('Photo::setTags', params, function(data) {

		if (data!==true) lychee.error(null, params, data)

	})

}

photo.deleteTag = function(photoID, index) {

	let tags

	// Remove
	tags = photo.json.tags.split(',')
	tags.splice(index, 1)

	// Save
	photo.json.tags = tags.toString()
	photo.setTags([photoID], photo.json.tags)

}

photo.share = function(photoID, service) {

	let link = '',
	    url  = photo.getViewLink(photoID)

	switch (service) {
		case 'twitter':
			link = `https://twitter.com/share?url=${ encodeURI(url) }`
			break
		case 'facebook':
			link = `http://www.facebook.com/sharer.php?u=${ encodeURI(url) }&t=${ encodeURI(photo.json.title) }`
			break
		case 'mail':
			link = `mailto:?subject=${ encodeURI(photo.json.title) }&body=${ encodeURI(url) }`
			break
		case 'dropbox':
			lychee.loadDropbox(function() {
				let filename = photo.json.title + '.' + photo.getDirectLink().split('.').pop()
				Dropbox.save(photo.getDirectLink(), filename)
			})
			break
		default:
			link = ''
			break
	}

	if (link.length!=='') location.href = link

}

photo.getSize = function() {

	// Size can be 'big', 'medium' or 'small'
	// Default is big
	// Small is centered in the middle of the screen
	let size       = 'big',
	    scaled     = false,
	    hasMedium  = photo.json.medium!=='',
	    pixelRatio = window.devicePixelRatio,
	    view       = {
	    	width  : $(window).width() - 60,
	    	height : $(window).height() - 100
	    }

	// Detect if the photo will be shown scaled,
	// because the screen size is smaller than the photo
	if (photo.json.width>view.width || photo.json.height>view.height) scaled = true

	// Calculate pixel ratio of screen
	if (pixelRatio!==undefined && pixelRatio>1) {
		view.width	= view.width * pixelRatio
		view.height	= view.height * pixelRatio
	}

	// Medium available and
	// Medium still bigger than screen
	if (hasMedium===true && (1920>view.width && 1080>view.height)) size = 'medium'

	// Photo not scaled
	// Photo smaller then screen
	if (scaled===false && (photo.json.width<view.width&& photo.json.width<view.height)) size = 'small'

	return size

}

photo.getArchive = function(photoID) {

	let link,
	    url = `${ api.path }?function=Photo::getArchive&photoID=${ photoID }`

	if (location.href.indexOf('index.html')>0) link = location.href.replace(location.hash, '').replace('index.html', url)
	else                                       link = location.href.replace(location.hash, '') + url

	if (lychee.publicMode===true) link += '&password=' + password.value

	location.href = link

}

photo.getDirectLink = function() {

	let url = ''

	if (photo.json && photo.json.url && photo.json.url!=='') url = photo.json.url

	return url

}

photo.getViewLink = function(photoID) {

	let url = 'view.php?p=' + photoID

	if (location.href.indexOf('index.html')>0) return location.href.replace('index.html' + location.hash, url)
	else                                       return location.href.replace(location.hash, url)

}