/* eslint-env jasmine */

import WaveSurfer from '../src/wavesurfer.js';

import TestHelpers from './test-helpers.js';

/** @test {util.fetchFile} */
describe('util.fetchFile:', function() {
    const audioExampleUrl = TestHelpers.EXAMPLE_FILE_PATH;

    it('load ArrayBuffer response', function(done) {
        const options = {
            url: audioExampleUrl,
            responseType: 'arraybuffer'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('success', data => {
            expect(instance.response.status).toEqual(200);
            expect(instance.response.headers.get('content-type')).toEqual(
                'audio/wav'
            );

            // options
            expect(instance.fetchRequest.url).toEndWith(options.url);
            expect(instance.fetchRequest.cache).toEqual('default');
            expect(instance.fetchRequest.method).toEqual('GET');
            expect(instance.fetchRequest.mode).toEqual('cors');

            // returned data is an arraybuffer
            expect(data).toEqual(jasmine.any(ArrayBuffer));

            done();
        });
    });

    it('load Blob response', function(done) {
        const options = {
            url: audioExampleUrl,
            responseType: 'blob'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('success', data => {
            expect(instance.response.status).toEqual(200);
            expect(instance.response.headers.get('content-type')).toEqual(
                'audio/wav'
            );

            // returned data is a Blob
            expect(data).toEqual(jasmine.any(Blob));

            done();
        });
    });

    it('load JSON response', function(done) {
        const options = {
            url: '/base/spec/support/test.json',
            responseType: 'json'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('success', data => {
            expect(instance.response.status).toEqual(200);
            expect(instance.response.headers.get('content-type')).toEqual(
                'application/json'
            );

            // returned data is an array
            expect(data).toEqual([[0, 1, 2, 3]]);

            done();
        });
    });

    it('load text response', function(done) {
        const options = {
            url: '/base/spec/support/test.txt',
            responseType: 'text'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('success', data => {
            expect(instance.response.status).toEqual(200);
            expect(instance.response.headers.get('content-type')).toEqual(
                'text/plain'
            );

            // returned data is a string
            expect(data).toEqual('hello world');

            done();
        });
    });

    it('load unknown response type', function(done) {
        const options = {
            url: audioExampleUrl,
            responseType: 'fooBar'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('error', error => {
            expect(error).toEqual(
                new Error('Unknown responseType: ' + options.responseType)
            );

            done();
        });
    });

    it('throws error when URL contains credentials', function() {
        const options = {
            url: 'http://user:password@example.com'
        };
        try {
            WaveSurfer.util.fetchFile(options);
        } catch (err) {
            expect(err).toEqual(jasmine.any(TypeError));
        }
    });

    it('throws error when URL is missing', function() {
        try {
            WaveSurfer.util.fetchFile({});
        } catch (err) {
            expect(err).toEqual(new Error('fetch url missing'));
        }
    });

    it('throws error when options are missing', function() {
        try {
            WaveSurfer.util.fetchFile();
        } catch (err) {
            expect(err).toEqual(new Error('fetch options missing'));
        }
    });

    it('fires error event when the file is not found', function(done) {
        const options = {
            url: '/foo/bar'
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('error', error => {
            expect(instance.response.status).toEqual(404);
            expect(error).toEqual(new Error('HTTP error status: 404'));

            done();
        });
    });

    it('accepts custom request headers', function(done) {
        const options = {
            url: '/base/spec/support/test.txt',
            responseType: 'text',
            requestHeaders: [
                {
                    key: 'Content-Type',
                    value: 'text/plain'
                }
            ]
        };
        const instance = WaveSurfer.util.fetchFile(options);
        instance.once('success', data => {
            expect(instance.response.headers.has('Content-Type')).toBeTrue();
            expect(instance.response.headers.get('Content-Type')).toEqual(
                'text/plain'
            );

            done();
        });
    });
});

/** @test {util} */
describe('util:', function() {
    /** @test {getId} */
    it('getId returns a random string with a default prefix', function() {
        const prefix = 'wavesurfer_';
        expect(WaveSurfer.util.getId()).toStartWith(prefix);
    });

    /** @test {getId} */
    it('getId returns a random string with a custom prefix', function() {
        const prefix = 'test-';
        expect(WaveSurfer.util.getId(prefix)).toStartWith(prefix);
    });

    /** @test {min} */
    it('min returns the smallest number in the provided array', function() {
        expect(WaveSurfer.util.min([0, 1, 1.1, 100, -1])).toEqual(-1);
    });

    /** @test {min} */
    it('min returns +Infinity for an empty array', function() {
        expect(WaveSurfer.util.min([])).toEqual(+Infinity);
    });

    /** @test {max} */
    it('max returns the largest number in the provided array', function() {
        expect(WaveSurfer.util.max([0, 1, 1.1, 100, -1])).toEqual(100);
    });

    /** @test {max} */
    it('max returns -Infinity for an empty array', function() {
        expect(WaveSurfer.util.max([])).toEqual(-Infinity);
    });

    /** @test {absMax} */
    it('absMax returns largest absolute number in the provided array when largest is positive', function() {
        expect(WaveSurfer.util.absMax([0, 1, 1.1, 100, -1])).toEqual(100);
    });

    /** @test {absMax} */
    it('absMax returns largest absolute number in the provided array when largest is negative', function() {
        expect(WaveSurfer.util.absMax([0, 1, -101, 1.1, 100, -1])).toEqual(101);
    });

    /** @test {absMax} */
    it('absMax returns -Infinity for an empty array', function() {
        expect(WaveSurfer.util.absMax([])).toEqual(-Infinity);
    });

    /** @test {style} */
    it('style applies a map of styles to an element', function() {
        let el = {
            style: {}
        };
        let styles = {
            backgroundcolor: 'red',
            'background-color': 'blue'
        };
        let result = {
            style: styles
        };
        expect(WaveSurfer.util.style(el, styles)).toEqual(result);
    });
});

/** @test {util.clamp} */
describe('util.clamp:', function() {
    const min = 0;
    const max = 2;

    /** @test {clamp/min} */
    it('clamp should return min if val is less than min', function() {
        const val = min - 1;
        expect(WaveSurfer.util.clamp(val, min, max)).toBe(min);
    });

    /** @test {clamp/val} */
    it('clamp should return val if val is more than min and less than max', function() {
        const val = 1;
        expect(WaveSurfer.util.clamp(val, min, max)).toBe(val);
    });

    /** @test {clamp/max} */
    it('clamp should return max if val is more than max', function() {
        const val = max + 1;
        expect(WaveSurfer.util.clamp(val, min, max)).toBe(max);
    });
});