/* eslint no-invalid-this: "off" */

import Nightmare from 'nightmare';
import {URL} from 'url';
import config from './config.js';

let currentUser;

let actions = {
    clickIfExists: async function(selector) {
        let exists = await this.exists(selector);
        if (exists) await this.click(selector);
        return exists;
    },

    parsedUrl: async function() {
        return new URL(await this.url());
    },

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

    changeLanguageToEnglish: async function() {
        let langSelector = '.user-popover vn-autocomplete[ng-model="$ctrl.lang"]';

        let lang = await this.waitToClick('#user')
            .wait(langSelector)
            .waitToGetProperty(`${langSelector} input`, 'value');

        if (lang !== 'English')
            await this.autocompleteSearch(langSelector, 'English');
    },

    doLogin: async function(userName, password) {
        if (password == null) password = 'nightmare';
        await this.wait(`vn-login [name=user]`)
            .clearInput(`vn-login [name=user]`)
            .write(`vn-login [name=user]`, userName)
            .write(`vn-login [name=password]`, password)
            .click(`vn-login button[type=submit]`);
    },

    login: async function(userName) {
        if (currentUser !== userName) {
            let accountClicked = await this.clickIfExists('#user');

            if (accountClicked) {
                let buttonSelector = '.vn-dialog.shown button[response=accept]';
                await this.waitToClick('#logout')
                    .wait(buttonSelector => {
                        return document.querySelector(buttonSelector) != null
                            || location.hash == '#!/login';
                    }, buttonSelector);
                await this.clickIfExists(buttonSelector);
            }

            try {
                await this.waitForURL('#!/login');
            } catch (e) {
                await this.goto(`${config.url}/#!/login`);
            }

            await this.doLogin(userName, null)
                .waitForURL('#!/')
                .changeLanguageToEnglish();

            currentUser = userName;
        } else
            await this.waitToClick('a[ui-sref=home]');
    },

    waitForLogin: async function(userName) {
        await this.login(userName);
    },

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

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

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

    clearTextarea: function(selector) {
        return this.wait(selector)
            .evaluate(inputSelector => {
                return document.querySelector(inputSelector).value = '';
            }, selector);
    },

    clearInput: function(selector) {
        return this.wait(selector)
            .evaluate(selector => {
                let $ctrl = document.querySelector(selector).closest('.vn-field').$ctrl;
                $ctrl.field = null;
                $ctrl.$.$apply();
                $ctrl.input.dispatchEvent(new Event('change'));
            }, selector);
    },

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

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

    waitPropertyValue: function(selector, property, status) {
        return this.wait(selector)
            .wait((selector, property, status) => {
                const element = document.querySelector(selector);
                return element[property] === status;
            }, selector, property, status);
    },

    waitToGetProperty: function(selector, property) {
        return this.wait((selector, property) => {
            const element = document.querySelector(selector);

            return element && element[property] != null && element[property] !== '';
        }, selector, property)
            .getProperty(selector, property);
    },

    write: function(selector, text) {
        return this.wait(selector)
            .type(selector, text);
    },

    waitToClick: function(selector) {
        return this.wait(selector)
            .click(selector);
    },

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

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

    clickIfVisible: function(selector) {
        return this.wait(selector)
            .isVisible(selector)
            .then(visible => {
                if (visible)
                    return this.click(selector);

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

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

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

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

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

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

    waitForTextInInput: function(selector, text) {
        return this.wait(selector)
            .wait((selector, text) => {
                return document.querySelector(selector).value.toLowerCase().includes(text.toLowerCase());
            }, selector, text);
    },

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

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

    waitForURL: function(hashURL) {
        return this.wait(hash => {
            return document.location.hash.includes(hash);
        }, hashURL);
    },

    waitForShapes: function(selector) {
        return this.wait(selector)
            .evaluate(selector => {
                const shapes = document.querySelectorAll(selector);
                const shapesList = [];

                for (const shape of shapes)
                    shapesList.push(shape.innerText);


                return shapesList;
            }, selector);
    },
    waitForSnackbar: function() {
        return this.wait(500)
            .waitForShapes('vn-snackbar .shape .text');
    },

    waitForLastShape: function(selector) {
        return this.wait(selector)
            .evaluate(selector => {
                const shape = document.querySelector(selector);

                return shape.innerText;
            }, selector);
    },

    waitForLastSnackbar: function() {
        return this.wait(500)
            .waitForLastShape('vn-snackbar .shape .text');
    },

    accessToSearchResult: function(searchValue) {
        return this.clearInput('vn-searchbar input')
            .write('vn-searchbar input', searchValue)
            .click('vn-searchbar vn-icon[icon="search"]')
            .wait(100)
            .waitForNumberOfElements('.search-result', 1)
            .evaluate(() => {
                return document.querySelector('ui-view vn-card vn-table') != null;
            })
            .then(result => {
                if (result)
                    return this.waitToClick('ui-view vn-card vn-td');

                return this.waitToClick('ui-view vn-card a');
            });
    },

    accessToSection: function(sectionRoute) {
        return this.wait(`vn-left-menu`)
            .evaluate(sectionRoute => {
                return document.querySelector(`vn-left-menu li li > a[ui-sref="${sectionRoute}"]`) != null;
            }, sectionRoute)
            .then(nested => {
                if (nested) {
                    this.waitToClick('vn-left-menu vn-item-section > vn-icon[icon=keyboard_arrow_down]')
                        .wait('vn-left-menu .expanded');
                }

                return this.waitToClick(`vn-left-menu li > a[ui-sref="${sectionRoute}"]`)
                    .waitForSpinnerLoad();
            });
    },

    autocompleteSearch: function(autocompleteSelector, searchValue) {
        return this.waitToClick(`${autocompleteSelector} input`)
            .write(`.vn-drop-down.shown input`, searchValue)
            .waitToClick(`.vn-drop-down.shown li.active`)
            .wait((autocompleteSelector, searchValue) => {
                return document.querySelector(`${autocompleteSelector} input`).value
                    .toLowerCase()
                    .includes(searchValue.toLowerCase());
            }, autocompleteSelector, searchValue);
    },

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

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

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

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

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

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

for (let name in actions) {
    Nightmare.action(name, function(...args) {
        let fnArgs = args.slice(0, args.length - 1);
        let done = args[args.length - 1];

        actions[name].apply(this, fnArgs)
            .then(res => done(null, res))
            .catch(err => {
                let stringArgs = fnArgs
                    .map(i => typeof i == 'function' ? 'Function' : i)
                    .join(', ');

                let orgMessage = err.message.startsWith('.wait()')
                    ? '.wait() timed out'
                    : err.message;

                done(new Error(`.${name}(${stringArgs}) failed: ${orgMessage}`));
            });
    });
}