var preview = require( '../../../src/reducers/preview' );

QUnit.module( 'ext.popups/reducers#preview', {
	setup: function () {
		this.el = 'active link';
	}
} );

QUnit.test( '@@INIT', function ( assert ) {
	var state = preview( undefined, { type: '@@INIT' } );

	assert.expect( 1 );

	assert.deepEqual(
		state,
		{
			enabled: undefined,
			activeLink: undefined,
			activeEvent: undefined,
			activeToken: '',
			shouldShow: false,
			isUserDwelling: false
		}
	);
} );

QUnit.test( 'BOOT', function ( assert ) {
	var action = {
		type: 'BOOT',
		isEnabled: true
	};

	assert.expect( 1 );

	assert.deepEqual(
		preview( {}, action ),
		{
			enabled: true
		},
		'It should set whether or not previews are enabled.'
	);
} );

QUnit.test( 'SETTINGS_CHANGE', function ( assert ) {
	var action = {
		type: 'SETTINGS_CHANGE',
		enabled: true
	};

	assert.expect( 1 );

	assert.deepEqual(
		preview( {}, action ),
		{
			enabled: true
		},
		'It should set whether or not previews are enabled when settings change.'
	);
} );

QUnit.test( 'LINK_DWELL initializes the state for a new link', function ( assert ) {
	var action = {
		type: 'LINK_DWELL',
		el: this.el,
		event: {},
		token: '1234567890'
	};

	assert.deepEqual(
		preview( {}, action ),
		{
			activeLink: action.el,
			activeEvent: action.event,
			activeToken: action.token,
			shouldShow: false,
			isUserDwelling: true
		},
		'It should set active link and event as well as interaction info and hide the preview.'
	);
} );

QUnit.test( 'LINK_DWELL on an active link only updates dwell state', function ( assert ) {
	var action = {
			type: 'LINK_DWELL',
			el: this.el,
			event: {},
			token: '1234567890'
		},
		state = {
			activeLink: this.el,
			isUserDwelling: false
		};

	assert.deepEqual(
		preview( state, action ),
		{
			activeLink: this.el,
			isUserDwelling: true
		},
		'It should only set isUserDwelling to true'
	);
} );

QUnit.test( 'ABANDON_END', function ( assert ) {
	var action = {
			type: 'ABANDON_END',
			token: 'bananas'
		},
		state = {
			activeToken: 'bananas',
			isUserDwelling: false
		};

	assert.deepEqual(
		preview( state, action ),
		{
			activeLink: undefined,
			activeToken: undefined,
			activeEvent: undefined,
			fetchResponse: undefined,
			isUserDwelling: false,
			shouldShow: false
		},
		'ABANDON_END should hide the preview and reset the interaction info.'
	);

	// ---

	state = {
		activeToken: 'apples',
		isUserDwelling: true
	};

	assert.equal(
		preview( state, action ),
		state,
		'ABANDON_END should NOOP if the current interaction has changed.'
	);

	// ---

	state = {
		activeToken: 'bananas',
		isUserDwelling: true
	};

	assert.equal(
		preview( state, action ),
		state,
		'ABANDON_END should NOOP if the user is dwelling on the preview.'
	);
} );

QUnit.test( 'FETCH_END', function ( assert ) {
	var state = {
			activeLink: this.el
		},
		action = {
			type: 'FETCH_END',
			el: this.el,
			result: {}
		};

	assert.expect( 2 );

	assert.deepEqual(
		preview( state, action ),
		{
			activeLink: state.activeLink, // Previous state.

			fetchResponse: action.result,
			shouldShow: true
		},
		'It should store the result and signal that a preview should be rendered.'
	);

	// ---

	state = {
		activeLink: 'another active link'
	};
	action = {
		type: 'FETCH_END',
		el: this.el,
		result: {}
	};

	assert.deepEqual(
		preview( state, action ),
		state,
		'It should NOOP if the user has interacted with another link since the request was dispatched via the gateway.'
	);
} );

QUnit.test( 'PREVIEW_DWELL', function ( assert ) {
	var action = {
		type: 'PREVIEW_DWELL'
	};

	assert.expect( 1 );

	assert.deepEqual(
		preview( {}, action ),
		{
			isUserDwelling: true
		},
		'It should mark the preview as being dwelled on.'
	);
} );

QUnit.test( 'ABANDON_START', function ( assert ) {
	var action = {
		type: 'ABANDON_START'
	};

	assert.deepEqual(
		preview( {}, action ),
		{
			isUserDwelling: false
		},
		'ABANDON_START should mark the preview having been abandoned.'
	);
} );