import { ImageSource } from '@nativescript/core/image-source';
import * as imageAssetModule from '@nativescript/core/image-asset';
import * as fs from '@nativescript/core/file-system';
import * as app from '@nativescript/core/application';
import * as TKUnit from '../tk-unit';
import { Font } from '@nativescript/core/ui/styling/font';
import { Color } from '@nativescript/core/color';

const imagePath = '~/assets/logo.png';
const splashscreenPath = '~/assets/splashscreen.png';
const splashscreenWidth = 372;
const splashscreenHeight = 218;
const smallImagePath = '~/assets/small-image.png';

export function testFromResource() {
	// >> imagesource-resname
	const img = ImageSource.fromResourceSync('icon');
	// << imagesource-resname

	TKUnit.assert(img.height > 0, 'image.fromResource failed');
}

export function testFromUrl(done) {
	let result: ImageSource;

	// Deprecated method fromUrl
	ImageSource.fromUrl('https://www.google.com/images/errors/logo_sm_2.png').then(
		(res: ImageSource) => {
			// console.log("Image successfully loaded");
			// completed = true;
			result = res;
			try {
				TKUnit.assertNotEqual(result, undefined, 'Image not downloaded');
				TKUnit.assert(result.height > 0, 'Image not downloaded');
				done(null);
			} catch (e) {
				done(e);
			}
		},
		(error) => {
			// console.log("Error loading image: " + error);
			//completed = true;
			done(error);
		}
	);
}

export function testSaveToFile() {
	// >> imagesource-save-to
	const img = ImageSource.fromFileSync(imagePath);
	const folder = fs.knownFolders.documents();
	const path = fs.path.join(folder.path, 'test.png');
	const saved = img.saveToFile(path, 'png');
	// << imagesource-save-to
	TKUnit.assert(saved, 'Image not saved to file');
	TKUnit.assert(fs.File.exists(path), 'Image not saved to file');
}

export function testSaveToFile_WithQuality() {
	const img = ImageSource.fromFileSync(imagePath);
	const folder = fs.knownFolders.documents();
	const path = fs.path.join(folder.path, 'test.png');
	const saved = img.saveToFile(path, 'png', 70);
	TKUnit.assert(saved, 'Image not saved to file');
	TKUnit.assert(fs.File.exists(path), 'Image not saved to file');
}

export function testFromFile() {
	// >> imagesource-load-local
	const folder = fs.knownFolders.documents();
	const path = fs.path.join(folder.path, 'test.png');
	const img = ImageSource.fromFileSync(path);
	// << imagesource-load-local

	TKUnit.assert(img.height > 0, 'image.fromResource failed');

	// remove the image from the file system
	const file = folder.getFile('test.png');
	file.remove();
	TKUnit.assert(!fs.File.exists(path), 'test.png not removed');
}

export function testFromAssetFileNotFound(done) {
	let asset = new imageAssetModule.ImageAsset('invalidFile.png');
	asset.options = {
		width: 0,
		height: 0,
		keepAspectRatio: true,
	};

	ImageSource.fromAsset(asset).then(
		(source) => {
			done('Should not resolve with invalid file name.');
		},
		(error) => {
			TKUnit.assertNotNull(error);
			done();
		}
	);
}

export function testFromAssetSimple(done) {
	let asset = new imageAssetModule.ImageAsset(splashscreenPath);
	asset.options = {
		width: 0,
		height: 0,
		keepAspectRatio: true,
	};

	ImageSource.fromAsset(asset).then(
		(source) => {
			TKUnit.assertEqual(source.width, splashscreenWidth);
			TKUnit.assertEqual(source.height, splashscreenHeight);
			done();
		},
		(error) => {
			done(error);
		}
	);
}

export function testFromAssetWithExactScaling(done) {
	let asset = new imageAssetModule.ImageAsset(splashscreenPath);
	let scaleWidth = 10;
	let scaleHeight = 11;
	asset.options = {
		width: scaleWidth,
		height: scaleHeight,
		keepAspectRatio: false,
		autoScaleFactor: false,
	};

	ImageSource.fromAsset(asset).then(
		(source) => {
			TKUnit.assertEqual(source.width, scaleWidth);
			TKUnit.assertEqual(source.height, scaleHeight);

			const targetFilename = `splashscreenTemp.png`;
			const tempPath = fs.knownFolders.temp().path;
			const localFullPath = fs.path.join(tempPath, targetFilename);

			const fullImageSaved = source.saveToFile(localFullPath, 'png');

			if (fullImageSaved) {
				ImageSource.fromFile(localFullPath).then((sourceImage) => {
					TKUnit.assertEqual(sourceImage.width, scaleWidth);
					TKUnit.assertEqual(sourceImage.height, scaleHeight);
					done();
				});
			} else {
				done(`Error saving photo to local temp folder: ${localFullPath}`);
			}
		},
		(error) => {
			done(error);
		}
	);
}

export function testFromAssetWithScalingAndAspectRatio(done) {
	let asset = new imageAssetModule.ImageAsset(splashscreenPath);
	let scaleWidth = 10;
	let scaleHeight = 11;
	asset.options = {
		width: scaleWidth,
		height: scaleHeight,
		keepAspectRatio: true,
	};

	ImageSource.fromAsset(asset).then(
		(source) => {
			TKUnit.assertEqual(source.width, 18);
			TKUnit.assertEqual(source.height, scaleHeight);
			done();
		},
		(error) => {
			done(error);
		}
	);
}

export function testFromAssetWithScalingAndDefaultAspectRatio(done) {
	let asset = new imageAssetModule.ImageAsset(splashscreenPath);
	let scaleWidth = 10;
	let scaleHeight = 11;
	asset.options.width = scaleWidth;
	asset.options.height = scaleHeight;

	ImageSource.fromAsset(asset).then(
		(source) => {
			TKUnit.assertEqual(source.width, 18);
			TKUnit.assertEqual(source.height, scaleHeight);
			done();
		},
		(error) => {
			done(error);
		}
	);
}

export function testFromAssetWithBiggerScaling(done) {
	let asset = new imageAssetModule.ImageAsset(splashscreenPath);
	let scaleWidth = 600;
	let scaleHeight = 600;
	asset.options = {
		width: scaleWidth,
		height: scaleHeight,
		keepAspectRatio: false,
	};

	ImageSource.fromAsset(asset).then(
		(source) => {
			TKUnit.assertEqual(source.width, scaleWidth);
			TKUnit.assertEqual(source.height, scaleHeight);
			done();
		},
		(error) => {
			done(error);
		}
	);
}

export function testNativeFields() {
	const img = ImageSource.fromFileSync(imagePath);
	if (app.android) {
		TKUnit.assert(img.android != null, 'Image.android not updated.');
	} else if (app.ios) {
		TKUnit.assert(img.ios != null, 'Image.ios not updated.');
	}
}
const fullAndroidPng = 'iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAIAAAAmkwkpAAAAA3NCSVQICAjb4U/gAAAAFUlEQVQImWP8z4AAjAz/kTnIPGQAAG86AwGcuMlCAAAAAElFTkSuQmCC';
const fullIosPng = 'iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAIAAAAmkwkpAAAAAXNSR0IArs4c6QAAABxpRE9UAAAAAgAAAAAAAAACAAAAKAAAAAIAAAACAAAARiS4uJEAAAASSURBVBgZYvjPwABHSMz/DAAAAAD//0GWpK0AAAAOSURBVGNgYPiPhBgQAACEvQv1D5y/pAAAAABJRU5ErkJggg==';

const jpgImageAsBase64String =
	'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';
const expectedJpegStart = '/9j/4AAQSkZJRgAB';
const expectedPngStart = 'iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAIAAAAmkwkpAAA';

export function testBase64Encode_PNG() {
	// >> imagesource-to-base-string
	const img = ImageSource.fromFileSync(smallImagePath);
	let base64String = img.toBase64String('png');
	// << imagesource-to-base-string

	base64String = base64String.substr(0, expectedPngStart.length);
	TKUnit.assertEqual(base64String, expectedPngStart, 'Base 64 encoded PNG');
}

export function testBase64Encode_PNG_WithQuality() {
	const img = ImageSource.fromFileSync(smallImagePath);
	let base64String = img.toBase64String('png', 80);
	base64String = base64String.substr(0, expectedPngStart.length);
	TKUnit.assertEqual(base64String, expectedPngStart, 'Base 64 encoded PNG');
}

export function testBase64Encode_JPEG() {
	const img = ImageSource.fromFileSync(smallImagePath);

	let base64String = img.toBase64String('jpeg');
	base64String = base64String.substr(0, expectedJpegStart.length);

	TKUnit.assertEqual(base64String, expectedJpegStart, 'Base 64 encoded JPEG');
}

export function testBase64Encode_JPEG_With_Quality() {
	const img = ImageSource.fromFileSync(smallImagePath);

	let base64String = img.toBase64String('jpeg', 80);
	base64String = base64String.substr(0, expectedJpegStart.length);

	TKUnit.assertEqual(base64String, expectedJpegStart, 'Base 64 encoded JPEG');
}

export function testLoadFromBase64Encode_JPEG() {
	// >> imagesource-from-base-string
	let img: ImageSource;
	img = ImageSource.fromBase64Sync(jpgImageAsBase64String);
	// << imagesource-from-base-string

	TKUnit.assert(img !== null, 'Actual: ' + img);
	TKUnit.assertEqual(img.width, 4, 'img.width');
	TKUnit.assertEqual(img.height, 4, 'img.height');
}

export function testLoadFromBase64Encode_PNG() {
	let img: ImageSource;
	if (app.android) {
		img = ImageSource.fromBase64Sync(fullAndroidPng);
	} else if (app.ios) {
		img = ImageSource.fromBase64Sync(fullIosPng);
	}

	TKUnit.assert(img !== null, 'Actual: ' + img);
	TKUnit.assertEqual(img.width, 4, 'img.width');
	TKUnit.assertEqual(img.height, 4, 'img.height');
}

export function testLoadFromFontIconCode() {
	let img: ImageSource;
	img = ImageSource.fromFontIconCodeSync('F10B', Font.default.withFontFamily('FontAwesome'), new Color('red'));

	TKUnit.assert(img !== null, 'Actual: ' + img);
	TKUnit.assert(img.width !== null, 'img.width');
	TKUnit.assert(img.height !== null, 'img.width');
}

export function testResize() {
	const img = ImageSource.fromFileSync(imagePath);

	const newSize = Math.floor(Math.max(img.width, img.height) / 2);

	const resized = img.resize(newSize);

	TKUnit.assert(resized.width === newSize || resized.height === newSize, 'Image not resized correctly');
}