/* eslint-disable ghost/ember/alias-model-in-controller */
import $ from 'jquery';
import Controller from '@ember/controller';
import generatePassword from 'ghost-admin/utils/password-generator';
import validator from 'validator';
import {
    IMAGE_EXTENSIONS,
    IMAGE_MIME_TYPES
} from 'ghost-admin/components/gh-image-uploader';
import {computed} from '@ember/object';
import {inject as service} from '@ember/service';
import {task} from 'ember-concurrency';

function randomPassword() {
    let word = generatePassword(6);
    let randomN = Math.floor(Math.random() * 1000);

    return word + randomN;
}

export default Controller.extend({
    config: service(),
    ghostPaths: service(),
    notifications: service(),
    session: service(),
    settings: service(),
    ui: service(),

    availableTimezones: null,
    imageExtensions: IMAGE_EXTENSIONS,
    imageMimeTypes: IMAGE_MIME_TYPES,
    _scratchFacebook: null,
    _scratchTwitter: null,

    privateRSSUrl: computed('config.blogUrl', 'settings.publicHash', function () {
        let blogUrl = this.get('config.blogUrl');
        let publicHash = this.get('settings.publicHash');

        return `${blogUrl}/${publicHash}/rss`;
    }),

    actions: {
        save() {
            this.save.perform();
        },

        setTimezone(timezone) {
            this.set('settings.timezone', timezone.name);
        },

        removeImage(image) {
            // setting `null` here will error as the server treats it as "null"
            this.settings.set(image, '');
        },

        /**
         * Opens a file selection dialog - Triggered by "Upload Image" buttons,
         * searches for the hidden file input within the .gh-setting element
         * containing the clicked button then simulates a click
         * @param  {MouseEvent} event - MouseEvent fired by the button click
         */
        triggerFileDialog(event) {
            // simulate click to open file dialog
            // using jQuery because IE11 doesn't support MouseEvent
            $(event.target)
                .closest('.gh-setting-action')
                .find('input[type="file"]')
                .click();
        },

        /**
         * Fired after an image upload completes
         * @param  {string} property - Property name to be set on `this.settings`
         * @param  {UploadResult[]} results - Array of UploadResult objects
         * @return {string} The URL that was set on `this.settings.property`
         */
        imageUploaded(property, results) {
            if (results[0]) {
                return this.settings.set(property, results[0].url);
            }
        },

        toggleIsPrivate(isPrivate) {
            let settings = this.settings;

            settings.set('isPrivate', isPrivate);
            settings.get('errors').remove('password');

            let changedAttrs = settings.changedAttributes();

            // set a new random password when isPrivate is enabled
            if (isPrivate && changedAttrs.isPrivate) {
                settings.set('password', randomPassword());

            // reset the password when isPrivate is disabled
            } else if (changedAttrs.password) {
                settings.set('password', changedAttrs.password[0]);
            }
        },

        toggleLeaveSettingsModal(transition) {
            let leaveTransition = this.leaveSettingsTransition;

            if (!transition && this.showLeaveSettingsModal) {
                this.set('leaveSettingsTransition', null);
                this.set('showLeaveSettingsModal', false);
                return;
            }

            if (!leaveTransition || transition.targetName === leaveTransition.targetName) {
                this.set('leaveSettingsTransition', transition);

                // if a save is running, wait for it to finish then transition
                if (this.save.isRunning) {
                    return this.save.last.then(() => {
                        transition.retry();
                    });
                }

                // we genuinely have unsaved data, show the modal
                this.set('showLeaveSettingsModal', true);
            }
        },

        leaveSettings() {
            let transition = this.leaveSettingsTransition;
            let settings = this.settings;

            if (!transition) {
                this.notifications.showAlert('Sorry, there was an error in the application. Please let the Ghost team know what happened.', {type: 'error'});
                return;
            }

            // roll back changes on settings props
            settings.rollbackAttributes();

            return transition.retry();
        },

        validateFacebookUrl() {
            let newUrl = this._scratchFacebook;
            let oldUrl = this.get('settings.facebook');
            let errMessage = '';

            // reset errors and validation
            this.get('settings.errors').remove('facebook');
            this.get('settings.hasValidated').removeObject('facebook');

            if (newUrl === '') {
                // Clear out the Facebook url
                this.set('settings.facebook', '');
                return;
            }

            // _scratchFacebook will be null unless the user has input something
            if (!newUrl) {
                newUrl = oldUrl;
            }

            try {
                // strip any facebook URLs out
                newUrl = newUrl.replace(/(https?:\/\/)?(www\.)?facebook\.com/i, '');

                // don't allow any non-facebook urls
                if (newUrl.match(/^(http|\/\/)/i)) {
                    throw 'invalid url';
                }

                // strip leading / if we have one then concat to full facebook URL
                newUrl = newUrl.replace(/^\//, '');
                newUrl = `https://www.facebook.com/${newUrl}`;

                // don't allow URL if it's not valid
                if (!validator.isURL(newUrl)) {
                    throw 'invalid url';
                }

                this.settings.set('facebook', newUrl);
                this.settings.notifyPropertyChange('facebook');
            } catch (e) {
                if (e === 'invalid url') {
                    errMessage = 'The URL must be in a format like '
                               + 'https://www.facebook.com/yourPage';
                    this.get('settings.errors').add('facebook', errMessage);
                    return;
                }

                throw e;
            } finally {
                this.get('settings.hasValidated').pushObject('facebook');
            }
        },

        validateTwitterUrl() {
            let newUrl = this._scratchTwitter;
            let oldUrl = this.get('settings.twitter');
            let errMessage = '';

            // reset errors and validation
            this.get('settings.errors').remove('twitter');
            this.get('settings.hasValidated').removeObject('twitter');

            if (newUrl === '') {
                // Clear out the Twitter url
                this.set('settings.twitter', '');
                return;
            }

            // _scratchTwitter will be null unless the user has input something
            if (!newUrl) {
                newUrl = oldUrl;
            }

            if (newUrl.match(/(?:twitter\.com\/)(\S+)/) || newUrl.match(/([a-z\d.]+)/i)) {
                let username = [];

                if (newUrl.match(/(?:twitter\.com\/)(\S+)/)) {
                    [, username] = newUrl.match(/(?:twitter\.com\/)(\S+)/);
                } else {
                    [username] = newUrl.match(/([^/]+)\/?$/mi);
                }

                // check if username starts with http or www and show error if so
                if (username.match(/^(http|www)|(\/)/) || !username.match(/^[a-z\d._]{1,15}$/mi)) {
                    errMessage = !username.match(/^[a-z\d._]{1,15}$/mi) ? 'Your Username is not a valid Twitter Username' : 'The URL must be in a format like https://twitter.com/yourUsername';

                    this.get('settings.errors').add('twitter', errMessage);
                    this.get('settings.hasValidated').pushObject('twitter');
                    return;
                }

                newUrl = `https://twitter.com/${username}`;

                this.settings.get('hasValidated').pushObject('twitter');
                this.settings.set('twitter', newUrl);
                this.settings.notifyPropertyChange('twitter');
            } else {
                errMessage = 'The URL must be in a format like '
                           + 'https://twitter.com/yourUsername';
                this.get('settings.errors').add('twitter', errMessage);
                this.get('settings.hasValidated').pushObject('twitter');
                return;
            }
        }
    },

    _deleteTheme() {
        let theme = this.store.peekRecord('theme', this.themeToDelete.name);

        if (!theme) {
            return;
        }

        return theme.destroyRecord().catch((error) => {
            this.notifications.showAPIError(error);
        });
    },

    save: task(function* () {
        let notifications = this.notifications;
        let config = this.config;

        if (this.settings.get('twitter') !== this._scratchTwitter) {
            this.send('validateTwitterUrl');
        }

        if (this.settings.get('facebook') !== this._scratchFacebook) {
            this.send('validateFacebookUrl');
        }

        try {
            let settings = yield this.settings.save();
            config.set('blogTitle', settings.get('title'));

            // this forces the document title to recompute after a blog title change
            this.ui.updateDocumentTitle();

            return settings;
        } catch (error) {
            if (error) {
                notifications.showAPIError(error, {key: 'settings.save'});
            }
            throw error;
        }
    })
});