import {url as defaultURL} from './config';

let actions = {
    clickIfExists: async function(selector) {
        let exists;
        try {
            exists = await this.waitForSelector(selector, {timeout: 500});
        } catch (error) {
            exists = false;
        }
        if (exists) await this.waitToClick(selector);
        return exists;
    },

    expectURL: async function(expectedHash) {
        try {
            await this.waitForFunction(expectedHash => {
                return document.location.hash.includes(expectedHash);
            }, {}, expectedHash);
        } catch (error) {
            throw new Error(`failed to reach URL containing: ${expectedHash}`);
        }
        await this.waitForContentLoaded();
        return true;
    },

    waitUntilNotPresent: async function(selector) {
        await this.wait(selector => {
            return document.querySelector(selector) == null;
        }, selector);
    },

    doLogin: async function(userName, password = 'nightmare') {
        await this.waitForSelector(`vn-login vn-textfield[ng-model="$ctrl.user"]`, {visible: true});
        await this.clearInput(`vn-login vn-textfield[ng-model="$ctrl.user"]`);
        await this.write(`vn-login vn-textfield[ng-model="$ctrl.user"]`, userName);
        await this.clearInput(`vn-login vn-textfield[ng-model="$ctrl.password"]`);
        await this.write(`vn-login vn-textfield[ng-model="$ctrl.password"]`, password);
        await this.waitToClick('vn-login button[type=submit]');
    },

    login: async function(userName) {
        await this.goto(`${defaultURL}/#!/login`);
        let dialog = await this.evaluate(() => {
            return document.querySelector('button[response="accept"]');
        });
        if (dialog)
            await this.waitToClick('button[response="accept"]');

        await this.doLogin(userName);
        await this.waitForFunction(() => {
            return document.location.hash === '#!/';
        }, {});
    },

    selectModule: async function(moduleName) {
        let snakeName = moduleName.replace(/[\w]([A-Z])/g, m => {
            return m[0] + '-' + m[1];
        }).toLowerCase();

        let selector = `vn-home a[ui-sref="${moduleName}.index"]`;
        await this.waitToClick(selector);
        await this.expectURL(snakeName);
    },

    loginAndModule: async function(userName, moduleName) {
        await this.login(userName);
        await this.selectModule(moduleName);
    },

    datePicker: async function(selector, changeMonth, day) {
        let date = new Date();
        if (changeMonth) date.setMonth(date.getMonth() + changeMonth);
        date.setDate(day ? day : 16);
        date = date.toISOString().substr(0, 10);

        await this.wait(selector);
        await this.evaluate((selector, date) => {
            let input = document.querySelector(selector).$ctrl.input;
            input.value = date;
            input.dispatchEvent(new Event('change'));
        }, selector, date);
    },

    pickTime: async function(selector, time) {
        await this.wait(selector);
        await this.evaluate((selector, time) => {
            let input = document.querySelector(selector).$ctrl.input;
            input.value = time;
            input.dispatchEvent(new Event('change'));
        }, selector, time);
    },

    clearTextarea: async function(selector) {
        await this.waitForSelector(selector, {visible: true});
        await this.evaluate(inputSelector => {
            return document.querySelector(`${inputSelector} textarea`).value = '';
        }, selector);
    },

    clearInput: async function(selector) {
        await this.waitForSelector(selector, {visible: true});
        let field = await this.evaluate(selector => {
            return document.querySelector(`${selector} input`).closest('.vn-field').$ctrl.field;
        }, selector);
        if ((field != null && field != '') || field == '0') {
            let coords = await this.evaluate(selector => {
                let rect = document.querySelector(selector).getBoundingClientRect();
                return {x: rect.x + (rect.width / 2), y: rect.y + (rect.height / 2), width: rect.width};
            }, selector);
            await this.mouse.move(coords.x, coords.y);
            await this.waitForSelector(`${selector} [icon="clear"]`, {visible: true});
            await this.waitToClick(`${selector} [icon="clear"]`);
        }
        await this.evaluate(selector => {
            return document.querySelector(`${selector} input`).closest('.vn-field').$ctrl.field == '';
        }, selector);
    },

    getProperty: async function(selector, property) {
        return await this.evaluate((selector, property) => {
            return document.querySelector(selector)[property].replace(/\s+/g, ' ').trim();
        }, selector, property);
    },

    waitPropertyLength: async function(selector, property, minLength) {
        await this.waitForFunction((selector, property, minLength) => {
            const element = document.querySelector(selector);
            return element && element[property] != null && element[property] !== '' && element[property].length >= minLength;
        }, {}, selector, property, minLength);
        return await this.getProperty(selector, property);
    },

    expectPropertyValue: async function(selector, property, value) {
        let builtSelector = selector;
        if (property != 'innerText')
            builtSelector = await this.selectorFormater(selector);

        try {
            return await this.waitForFunction((selector, property, value) => {
                const element = document.querySelector(selector);
                return element[property] == value;
            }, {}, builtSelector, property, value);
        } catch (error) {
            throw new Error(`${value} wasn't the value of ${builtSelector}, ${error}`);
        }
    },

    waitToGetProperty: async function(selector, property) {
        let builtSelector = selector;
        if (selector.includes('vn-input-file') || property != 'innerText')
            builtSelector = await this.selectorFormater(selector);

        try {
            await this.waitForFunction((selector, property) => {
                const element = document.querySelector(selector);

                return element && element[property] != null && element[property] !== '';
            }, {}, builtSelector, property);
            return await this.getProperty(builtSelector, property);
        } catch (error) {
            throw new Error(`couldn't get property: ${property} of ${builtSelector}, ${error}`);
        }
    },

    write: async function(selector, text) {
        let builtSelector = await this.selectorFormater(selector);
        await this.waitForSelector(selector, {});
        await this.type(builtSelector, text);
        await this.waitForTextInField(selector, text);
    },

    waitToClick: async function(selector) {
        await this.waitForSelector(selector);
        await this.click(selector);
    },

    writeOnEditableTD: async function(selector, text) {
        let builtSelector = await this.selectorFormater(selector);
        await this.waitToClick(selector);
        await this.type(builtSelector, text);
        await this.keyboard.press('Enter');
    },

    focusElement: async function(selector) {
        await this.wait(selector);
        return await this.evaluate(selector => {
            let element = document.querySelector(selector);
            element.focus();
        }, selector);
    },

    isVisible: async function(selector) {
        await this.wait(selector);
        return await this.evaluate(elementSelector => {
            let selectorMatches = document.querySelectorAll(elementSelector);
            let element = selectorMatches[0];

            if (selectorMatches.length > 1)
                throw new Error(`Multiple matches of ${elementSelector} found`);

            let isVisible = false;
            if (element) {
                let eventHandler = event => {
                    event.preventDefault();
                    isVisible = true;
                };
                element.addEventListener('mouseover', eventHandler);
                let rect = element.getBoundingClientRect();
                let x = rect.left + rect.width / 2;
                let y = rect.top + rect.height / 2;
                let elementInCenter = document.elementFromPoint(x, y);
                let elementInTopLeft = document.elementFromPoint(rect.left, rect.top);
                let elementInBottomRight = document.elementFromPoint(rect.right, rect.bottom);

                let e = new MouseEvent('mouseover', {
                    view: window,
                    bubbles: true,
                    cancelable: true,
                });

                if (elementInCenter)
                    elementInCenter.dispatchEvent(e);

                if (elementInTopLeft)
                    elementInTopLeft.dispatchEvent(e);

                if (elementInBottomRight)
                    elementInBottomRight.dispatchEvent(e);

                element.removeEventListener('mouseover', eventHandler);
            }
            return isVisible;
        }, selector);
    },

    waitImgLoad: async function(selector) {
        await this.wait(selector);
        return await this.wait(selector => {
            const imageReady = document.querySelector(selector).complete;
            return imageReady;
        }, {}, selector);
    },

    clickIfVisible: async function(selector) {
        await this.wait(selector);
        let isVisible = await this.isVisible(selector);

        if (isVisible)
            return await this.click(selector);

        throw new Error(`invisible selector: ${selector}`);
    },

    countElement: async function(selector) {
        return await this.evaluate(selector => {
            return document.querySelectorAll(selector).length;
        }, selector);
    },

    waitForNumberOfElements: async function(selector, count) {
        return await this.waitForFunction((selector, count) => {
            return document.querySelectorAll(selector).length == count;
        }, {}, selector, count);
    },

    waitForClassNotPresent: async function(selector, className) {
        await this.wait(selector);
        return await this.wait((selector, className) => {
            if (!document.querySelector(selector).classList.contains(className))
                return true;
        }, {}, selector, className);
    },

    waitForClassPresent: async function(selector, className) {
        await this.wait(selector);
        return await this.wait((elementSelector, targetClass) => {
            if (document.querySelector(elementSelector).classList.contains(targetClass))
                return true;
        }, {}, selector, className);
    },

    waitForTextInElement: async function(selector, text) {
        await this.waitForSelector(selector);
        return await this.waitForFunction((selector, text) => {
            return document.querySelector(selector).innerText.toLowerCase().includes(text.toLowerCase());
        }, {}, selector, text);
    },

    selectorFormater: function(selector) {
        if (selector.includes('vn-textarea'))
            return `${selector} textarea`;

        if (selector.includes('vn-input-file'))
            return `${selector} section`;

        return `${selector} input`;
    },

    waitForTextInField: async function(selector, text) {
        let builtSelector = await this.selectorFormater(selector);
        await this.waitForSelector(builtSelector);
        return await this.waitForFunction((selector, text) => {
            return document.querySelector(selector).value.toLowerCase().includes(text.toLowerCase());
        }, {}, builtSelector, text);
    },

    waitForInnerText: async function(selector) {
        await this.waitForSelector(selector, {});
        await this.waitForFunction(selector => {
            const innerText = document.querySelector(selector).innerText;
            return innerText != null && innerText != '';
        }, {}, selector);
        return await this.evaluate(selector => {
            return document.querySelector(selector).innerText;
        }, selector);
    },

    waitForEmptyInnerText: async function(selector) {
        return await this.wait(selector => {
            return document.querySelector(selector).innerText == '';
        }, selector);
    },

    hideSnackbar: async function() {
        await this.waitFor(750); // holds up for the snackbar to be visible for a small period of time.
        await this.evaluate(() => {
            let hideButton = document.querySelector('#shapes .shown button');
            if (hideButton)
                return document.querySelector('#shapes .shown button').click();
        });
    },

    waitForLastSnackbar: async function() {
        const selector = 'vn-snackbar .shown .text';

        await this.waitForSelector(selector);
        let snackBarText = await this.evaluate(selector => {
            const shape = document.querySelector(selector);

            return shape.innerText;
        }, selector);
        await this.hideSnackbar();
        return snackBarText;
    },

    accessToSearchResult: async function(searchValue) {
        await this.clearInput('vn-searchbar');
        await this.write('vn-searchbar', searchValue);
        await this.waitToClick('vn-searchbar vn-icon[icon="search"]');
        await this.waitForNumberOfElements('.search-result', 1);
        await this.waitForContentLoaded();
        await this.evaluate(() => {
            return document.querySelector('.search-result').click();
        });
        await this.waitForContentLoaded();
    },

    accessToSection: async function(sectionRoute) {
        await this.waitForSelector('vn-left-menu');
        let nested = await this.evaluate(sectionRoute => {
            return document.querySelector(`vn-left-menu li li > a[ui-sref="${sectionRoute}"]`) != null;
        }, sectionRoute);

        if (nested) {
            await this.waitToClick('vn-left-menu vn-item-section > vn-icon[icon=keyboard_arrow_down]');
            await this.wait('vn-left-menu .expanded');
        }

        await this.evaluate(sectionRoute => {
            let navButton = document.querySelector(`vn-left-menu li > a[ui-sref="${sectionRoute}"]`);
            navButton.scrollIntoViewIfNeeded();
            return navButton.click();
        }, sectionRoute);
        await this.waitForNavigation({waitUntil: ['networkidle0']});
        await this.waitForContentLoaded();
    },

    autocompleteSearch: async function(selector, searchValue) {
        let builtSelector = await this.selectorFormater(selector);

        await this.waitForContentLoaded();
        await this.waitToClick(selector);
        await this.waitForSelector(selector => {
            document
                .querySelector(`${selector} vn-drop-down`).$ctrl.content
                .querySelectorAll('li');
        }, selector);

        await this.write('.vn-drop-down.vn-popover.vn-popup.shown vn-textfield', searchValue);

        try {
            await this.waitForFunction((selector, searchValue) => {
                let element = document
                    .querySelector(`${selector} vn-drop-down`).$ctrl.content
                    .querySelector('li.active');
                if (element)
                    return element.innerText.toLowerCase().includes(searchValue.toLowerCase());
            }, {}, selector, searchValue);
        } catch (error) {
            let inputValue = await this.evaluate(() => {
                return document.querySelector('.vn-drop-down.vn-popover.vn-popup.shown vn-textfield input').value;
            });
            throw new Error(`${builtSelector} value is ${inputValue}! ${error}`);
        }
        await this.keyboard.press('Enter');
        await this.waitForFunction((selector, searchValue) => {
            return document.querySelector(selector).value.toLowerCase()
                .includes(searchValue.toLowerCase());
        }, {}, builtSelector, searchValue);

        await this.waitForMutation('.vn-drop-down', 'childList');
        await this.waitForContentLoaded();
    },

    reloadSection: async function(sectionRoute) {
        await this.waitForContentLoaded();
        await Promise.all([
            this.waitForNavigation({waitUntil: 'networkidle0'}),
            this.click('vn-icon[icon="desktop_windows"]', {}),
        ]);

        await Promise.all([
            this.waitForNavigation({waitUntil: 'networkidle0'}),
            this.click(`vn-left-menu li > a[ui-sref="${sectionRoute}"]`, {}),
        ]);
        await this.waitForContentLoaded();
    },

    forceReloadSection: async function(sectionRoute) {
        await this.waitToClick('vn-icon[icon="desktop_windows"]');
        await this.waitToClick('button[response="accept"]');
        await this.wait('vn-card.summary');
        await this.waitToClick(`vn-left-menu li > a[ui-sref="${sectionRoute}"]`);
    },

    checkboxState: async function(selector) {
        await this.wait(selector);
        return await this.evaluate(selector => {
            let checkbox = document.querySelector(selector);
            switch (checkbox.$ctrl.field) {
            case null:
                return 'intermediate';
            case true:
                return 'checked';
            default:
                return 'unchecked';
            }
        }, selector);
    },

    isDisabled: async function(selector) {
        await this.waitForSelector(selector);
        return await this.evaluate(selector => {
            let element = document.querySelector(selector);
            return element.$ctrl.disabled;
        }, selector);
    },

    waitForStylePresent: async function(selector, property, value) {
        return await this.wait((selector, property, value) => {
            const element = document.querySelector(selector);
            return element.style[property] == value;
        }, {}, selector, property, value);
    },

    waitForSpinnerLoad: async function() {
        await this.waitUntilNotPresent('vn-topbar vn-spinner');
    },

    waitForWatcherData: async function(selector) {
        await this.wait(selector);
        await this.wait(selector => {
            let watcher = document.querySelector(selector);
            let orgData = watcher.$ctrl.orgData;
            return !angular.equals({}, orgData) && orgData != null;
        }, {}, selector);
        await this.waitForSpinnerLoad();
    },

    waitForMutation: async function(selector, type) {
        try {
            await this.evaluate((selector, type) => {
                return new Promise(resolve => {
                    const config = {attributes: true, childList: true, subtree: true};
                    const target = document.querySelector(selector);

                    const onEnd = function(mutationsList, observer) {
                        resolve();

                        observer.disconnect();
                    };
                    const observer = new MutationObserver(onEnd);
                    observer.expectedType = type;

                    observer.observe(target, config);
                });
            }, selector, type);
        } catch (error) {
            throw new Error(`failed to wait for mutation type: ${type}`);
        }
    },

    waitForTransitionEnd: async function(selector) {
        await this.evaluate(selector => {
            return new Promise(resolve => {
                const transition = document.querySelector(selector);
                const onEnd = function() {
                    transition.removeEventListener('transitionend', onEnd);
                    resolve();
                };
                transition.addEventListener('transitionend', onEnd);
            });
        }, selector);
    },

    closePopup: async function(selector) {
        await Promise.all([
            this.keyboard.press('Escape'),
            this.waitForSelector('.vn-popup', {hidden: true}),
        ]);
    },

    waitForContentLoaded: async function() {
        await this.waitFor(1000);
        // to be implemented in base of a directive loaded once al modules are done loading, further investigation required.
        // await this.waitForFunction(() => {
        //     return new Promise(resolve => {
        //         angular.element(document).ready(() => resolve());
        // const $rootScope = angular.element(document).find('ui-view').injector().get('$rootScope');
        // $rootScope.$$postDigest(resolve());
        // $rootScope.$on('$viewContentLoaded', resolve());
        //     });
        // });
    }
};

export function extendPage(page) {
    for (let name in actions) {
        page[name] = async(...args) => {
            return await actions[name].call(page, ...args);
        };
    }

    page.wait = page.waitFor;

    return page;
}

export default actions;