import { registerModule } from '../moduleRegister';

class CreatePageWidget {
    constructor(dom) {
        this.baseDom = dom;
        this.pageUrl = null;
        this.api = new mw.Api();

        this.hasErrors = false;
        this.hasWarnings = false;

        this.createButtonEnabled = true;

        this.initDom();
    }

    initDom() {
        let namespaces = mw.config.get('wgIsekaiCreatePageTypes');
        if (!Array.isArray(namespaces) || namespaces.length === 0) {
            namespaces = [
                {
                    type: 'default',
                    name: 'Main',
                    prefix: '',
                }
            ];
        }

        this.selectPageTypeDropdown = new OO.ui.DropdownInputWidget({
            options: namespaces.map((nsInfo) => ({
                data: JSON.stringify(nsInfo),
                label: nsInfo.name,
            })),
        });
        this.selectPageTypeDropdown.on('change', this.onPageTypeChange.bind(this));

        this.pageNameInput = new isekai.ui.CreatePageInputWidget({
            placeholder: mw.message('isekai-createpage-page-title').parse(),
        });
        this.pageNameInput.on('enter', this.createPage.bind(this));
        this.pageNameInput.on('change', this.onPageNameChange.bind(this));

        this.createButton = new OO.ui.ButtonWidget({
            label: mw.message('isekai-createpage-create-page-button').parse(),
            flags: [
                'primary',
                'progressive'
            ]
        });
        this.createButton.on('click', this.createPage.bind(this));

        this.inputGroup = new OO.ui.ActionFieldLayout(this.pageNameInput, this.createButton, {
            align: 'center'
        });

        this.formGroup = new OO.ui.HorizontalLayout({
            items: [
                this.selectPageTypeDropdown,
                this.inputGroup
            ]
        });

        this.errorsContainer = $('<div class="errors-container">');

        this.ignoreWarningsCheckbox = new OO.ui.CheckboxInputWidget({
            selected: false
        });
        this.ignoreWarningsCheckbox.on('change', this.refreshCreatePageBtnEnabled.bind(this));

        this.ignoreWarningsCheckboxField = new OO.ui.FieldLayout(this.ignoreWarningsCheckbox, {
            align: 'inline',
            label: mw.message('isekai-createpage-warning-ignore').parse(),
	        helpInline: true,
            help: mw.message('isekai-createpage-ignore-warnings-help').parse(),
        });
        this.ignoreWarningsCheckboxField.$element
            .addClass('isekai-createpage-ignore-warnings-field')
            .hide();

        this.cardContent = this.baseDom.find('.card-body .card-content');
        this.cardContent.append(this.formGroup.$element);
        this.cardContent.append(this.errorsContainer);
        this.cardContent.append(this.ignoreWarningsCheckboxField.$element);
    }

    createPage() {
        let title = this.pageNameInput.getValue();
        let pageTypeConfig = this.selectPageTypeDropdown.getValue();
        pageTypeConfig = JSON.parse(pageTypeConfig || '{}');
        
        let pageTypeId = pageTypeConfig.id || 'default';
        let fullTitle = (pageTypeConfig.prefix || '') + title;

        if (title.trim().length > 0) {
            this.createButton.setDisabled(true);

            if (this.hasWarnings && this.ignoreWarningsCheckbox.isSelected()) {
                // 已忽略警告
                this._doCreatePage(fullTitle);
            } else {
                this.validateNewPageTitle(title, pageTypeId).then((valid) => {
                    if (valid) {
                        this._doCreatePage(fullTitle);
                    }
                });
            }
        } else {
            this.setErrors([
                mw.message('isekai-createpage-title-empty').parse()
            ]);
        }
    }

    _doCreatePage(fullTitle) {
        let targetUrl = mw.util.getUrl(fullTitle, { veaction: 'edit' });
        window.open(targetUrl, '_blank');

        this.pageNameInput.setValue('');
        this.clearErrorWarnings();
    }

    onPageNameChange() {
        this.clearErrorWarnings();

        let value = this.pageNameInput.getValue();
        if (value.indexOf('：') !== -1 || value.indexOf('`') !== -1) {
            let range = this.pageNameInput.getRange();
            value = value.replace(/：/g, ':').replace(/`/g, '·');
            this.pageNameInput.setValue(value);
            this.pageNameInput.selectRange(range.from, range.to);
        }
    }

    onPageTypeChange() {
        let pageTypeConfig = this.selectPageTypeDropdown.getValue();
        this.pageNameInput.setPagePrefix(pageTypeConfig.prefix);
        this.clearErrorWarnings();
    }

    makeMessageRaw(kind, html) {
        let $el = new OO.ui.MessageWidget({
            type: kind,
            inline: true,
            label: html,
        }).$element;
        let $label = $el.find('.oo-ui-labelElement-label');
        $label.html(html);

        return $el;
    }

    setErrors(errorMessages) {
        errorMessages.forEach((errorMessage) => {
            let $message = this.makeMessageRaw('error', errorMessage);
            this.errorsContainer.append($message);
        });
        this.hasErrors = true;

        this.refreshCreatePageBtnEnabled();
        this.refreshIgnoreWarningsCheckbox();
    }

    setWarnings(warningMessages) {
        warningMessages.forEach((warningMessage) => {
            let $message = this.makeMessageRaw('warning', warningMessage);
            this.errorsContainer.append($message);
        });
        this.hasWarnings = true;

        this.refreshCreatePageBtnEnabled();
        this.refreshIgnoreWarningsCheckbox();
    }

    clearErrorWarnings() {
        if (this.hasErrors || this.hasWarnings) {
            this.errorsContainer.empty();

            this.hasErrors = false;
            this.hasWarnings = false;

            this.refreshCreatePageBtnEnabled();
            this.refreshIgnoreWarningsCheckbox();
        }
    }

    refreshCreatePageBtnEnabled() {
        this.createButtonEnabled = (() => {
            if (this.hasErrors) {
                return false;
            }

            if (this.hasWarnings) {
                // 检查是否忽略警告
                return this.ignoreWarningsCheckbox.isSelected();
            }

            return true;
        })();

        this.createButton.setDisabled(!this.createButtonEnabled);
    }

    refreshIgnoreWarningsCheckbox() {
        if (this.hasWarnings && !this.hasErrors) {
            this.ignoreWarningsCheckboxField.$element.show();
        } else {
            this.ignoreWarningsCheckboxField.$element.hide();
        }

        if (!this.hasWarnings && !this.hasErrors) {
            // 没有警告和错误时，重置忽略警告复选框
            this.ignoreWarningsCheckbox.setSelected(false);
        }
    }

    validateNewPageTitle(title, pageType = 'default') {
        return new Promise((resolve, reject) => {
            this.api.get({
                action: 'isekaiwidgets',
                method: 'createpagevalidatetitle',
                iwnewpagetitle: title,
                iwnewpagetype: pageType,
            }).done((data) => {
                if (data.isekaiwidget && data.isekaiwidget.createpagevalidatetitle) {
                    let result = data.isekaiwidget.createpagevalidatetitle;

                    if (!result.hasError && !result.hasWarning) {
                        resolve(true);
                        return;
                    }

                    if (result.hasError) {
                        this.setErrors(result.errors.map(error => error.message));
                    }
                    if (result.hasWarning) {
                        this.setWarnings(result.warnings.map(warning => warning.message));
                    }

                    resolve(false);
                } else {
                    resolve(false);
                }
            }).fail(reject);
        });
    }
}

registerModule('ui.CreatePageWidget', CreatePageWidget);