const readFileToURL = (file,onOver)=>{
	var reader = new FileReader();
	reader.onload = ()=>{
		const src = reader.result;
		onOver(src);
	};
	reader.readAsDataURL(file);
};

const readFileAndSetIMGSrc = file=>{
	readFileToURL(file,src=>{
		// const img = new Image();
		const img = document.querySelector('img')
		img.src = src;
		img.onload = ()=>{
			app.img = img;
			louvre(img,app.style, src=>{
				app.src = src;
			});
		}
	});
};

const isImageRegex = /^image\/(jpeg|gif|png|bmp|webp)$/;

document.addEventListener('paste',e=>{
	// console.log(e.clipboardData,e.clipboardData.files);

	const clipboardData = e.clipboardData;
	if(clipboardData.items[0]){
		let file = clipboardData.items[0].getAsFile();

		if(file && isImageRegex.test(file.type)){
			return readFileAndSetIMGSrc(file);
		}
	}

	if(clipboardData.files.length){
		for(let i = 0;i<clipboardData.files.length;i++){
			if(isImageRegex.test(clipboardData.files[i].type)){
				console.log(clipboardData.files[i])
				readFileAndSetIMGSrc(clipboardData.files[i]);
			}
		}
	}
});

document.addEventListener('dragover',e=>{
	e.preventDefault();
});
document.addEventListener('drop',e=>{
	e.preventDefault();

	const file = e.dataTransfer.files[0];

	if(file && file.type.match(isImageRegex)){
		readFileAndSetIMGSrc(file);
	}
});

const _louvre = (img,style,callback)=>{

	clearTimeout(louvre.T);
	louvre.T = setTimeout(()=>{
		louvre(img,style,callback);
		app.saveData();
	},100);
};

const deepCopy = o=>JSON.parse(JSON.stringify(o));





const creatConvoluteCenterHigh = (w,centerV)=>{
	const arr = [];
	const c = Math.floor((w*w)/2);

	for(let x = 0; x < w; x++){
		for(let y = 0; y < w; y++){
			let i = x * w + y;
			arr[i] = -1;

			if(i===c){
				arr[i] = centerV;
			}
		}
	}
	return arr;
}
const creatConvoluteAverage = (w)=>new Array(w*w).fill(1/(w*w))


const Convolutes = {
	// '右倾': [
	// 	0, -1, 0,
	// 	-1, 2, 2,
	// 	0, -1, 0
	// ],
	// '左倾': [
	// 	0, -1, 0,
	// 	3, 2, -2,
	// 	0, -1, 0
	// ],
	'极细':   creatConvoluteAverage(3),
	'精细':  creatConvoluteAverage(5),
	'一般':  creatConvoluteAverage(7),
	'稍粗':  creatConvoluteAverage(9),
	'超粗':  creatConvoluteAverage(11),
	'极粗':  creatConvoluteAverage(13),
	// '12421': [
	// 	-3,2,-3,
	// 	 2,4, 2,
	// 	-3,2,-3,
	// ],
	// '9,-1,8': [
	// 	-1 ,-1 ,-1 ,
	// 	-1 , 9 ,-1 ,
	// 	-1 ,-1 ,-1 ,
	// ],
	// '25,-1,24':creatConvoluteCenterHigh(5,24),
	// '25,-1,25': creatConvoluteCenterHigh(5,25),
	// '25,-1,26': [
	// 	-1 , -1 , -1 , -1 , -1 ,
	// 	-1 , -1 , -1 , -1 , -1 ,
	// 	-1 , -1 , 26 , -1 , -1 ,
	// 	-1 , -1 , -1 , -1 , -1 ,
	// 	-1 , -1 , -1 , -1 , -1 ,
	// ],
	// '-1,0,16': [
	// 	-1 , -1 , -1 , -1 , -1 ,
	// 	-1 ,  0 ,  0 ,  0 , -1 ,
	// 	-1 ,  0 , 17 ,  0 , -1 ,
	// 	-1 ,  0 ,  0 ,  0 , -1 ,
	// 	-1 , -1 , -1 , -1 , -1 ,
	// ],
	'浮雕': [
		1, 1, 1,
		1, 1, -1,
		-1, -1, -1
	]
}

const style = {
	zoom:1,
	light:0,
	blackLimit: 80,
	blackLight: 40,
	s:80,
	l:50,
	black:true,
	kuma:true,
	hajimei:false,
	watermark: false,
	convoluteName: '一般',
	convolute1Diff: true,
	convoluteName2: null,
	Convolutes,
	contrast: 30,
	invertLight: false,
	hue:false,
	hueGroup:255,
	lightGroup:1,
	lightCut: 128,
	darkCut: 120,

};



const data = {
	img:null,
	style,
	runing: false,
};





const chooseFile = callback=>{
	chooseFile.form.reset();
	chooseFile.input.onchange = function(){
		if(!this.files||!this.files[0])return;
		callback(this.files[0]);
	};
	chooseFile.input.click();
};
chooseFile.form = document.createElement('form');
chooseFile.input = document.createElement('input');
chooseFile.input.type = 'file';
chooseFile.form.appendChild(chooseFile.input);



const app = new Vue({
	el:'.app',
	data,
	methods: {
		_louvre(){
			clearTimeout(app.T)
			app.T = setTimeout(this.louvre,300)
		},
		async louvre(){
			app.runing = true;
			app.src = await louvre({
				img: this.img,
				canvas: this.$refs['canvas'],
				config: {
					...this.style,
					Convolutes,
				}
			});
			app.runing = false;
		},
		async setImageAndDraw(e){
			let img = e.target;

			console.log(img);
			this.img = img;
			await this.louvre();
		},
		output(){
			const a = document.createElement('a');
			a.href = this.src;
			a.download = `[lab.magiconch.com][90s-time-machine]-${+Date.now()}.jpg`;
			a.click();
		},
		chooseFile(){
			chooseFile(readFileAndSetIMGSrc)
		},
	},
	watch:{
		style:{
			deep:true,
			handler(){
				this._louvre();
			}
		}
	}
});