import './lib/gt.js';
import './lib/tom-select.complete.min.js';
import { PhoneProviderGeetestCaptcha } from './lib/gtutils.js';

class SmsSenderForm {
    constructor(type, formSelector) {
        this.type = type;
        this.formElem = document.querySelector(formSelector);
        this.realmUrl = config.get('realmUrl');
        
        this.selectAreaCode = document.querySelector("#areaCodeInput");
        this.inputPhoneNumber = document.querySelector("#phoneNumberInput");
        this.inputCode = document.querySelector("#smsCodeInput");
        this.btnSend = document.querySelector("#btnSendSmsCode");

        this.countdown = null;
        this.resendTimeout = 120;
        this.areaCodeSelect = null;

        this.bindEvents();
        this.initConfig();
        this.initCaptcha();
    }

    bindEvents() {
        this.btnSend.addEventListener('click', this.onBtnSendClick.bind(this));

        this.inputPhoneNumber.addEventListener('input', () => {
            // Hide error message when user types
            const errorMsg = this.formElem.querySelector('.pf-v5-c-form__helper-text--error');
            if (errorMsg) {
                errorMsg.style.display = 'none';
            }
        });

        this.formElem.addEventListener('submit', () => {
            if (this.areaCodeSelect) {
                this.areaCodeSelect.enable();
            }
        });
    }

    initCaptcha() {
        this.captcha = new PhoneProviderGeetestCaptcha();
    }

    initConfig() {
        fetch(this.realmUrl + '/sms').then((res) => {
            if (res.ok) {
                return res.json();
            } else {
                throw new Error(msg.localize('cannotGetConfig'));
            }
        }).then((res) => {
            this.setAreaCodeList(res.areaCodeList || []);
            
            // Initialize TomSelect after data is loaded
            this.areaCodeSelect = new TomSelect('#areaCodeInput', {
                maxItems: 1,
                valueField: 'value',
                labelField: 'text',
                searchField: ['text', 'value'],
                create: false,
            });

            if (res.areaLocked) {
                this.areaCodeSelect.disable();
            }

            const defaultAreaCode = this.selectAreaCode.getAttribute('data-value') || res.defaultAreaCode || '86';
            this.areaCodeSelect.setValue(defaultAreaCode.toString());
        }).catch((err) => {
            console.error(err);
            this.showError(err.message);
        });
    }

    getFilledAreaCode(areaCode) {
        const maxLen = 4;
        let areaCodeStr = areaCode.toString();
        return '+' + areaCodeStr + ('\u2002'.repeat(maxLen - areaCodeStr.length));
    }

    getLocalizedName(nameList, langCode) {
        if (langCode in nameList) {
            return nameList[langCode];
        } else {
            return nameList['en'];
        }
    }

    showError(errorMessage) {
        // Find or create error message element
        let errorElement = this.formElem.querySelector('.phone-error-message');
        if (!errorElement) {
            errorElement = document.createElement('div');
            errorElement.className = 'pf-v5-c-form__helper-text pf-v5-c-form__helper-text--error phone-error-message';
            const phoneGroup = this.formElem.querySelector('[name="phoneNumber"]').closest('.pf-v5-c-form__group');
            if (phoneGroup) {
                phoneGroup.appendChild(errorElement);
            }
        }
        errorElement.textContent = errorMessage;
        errorElement.style.display = 'block';
    }

    setAreaCodeList(areaCodeList) {
        const langCode = msg.localize('countryNameLangCode');
        
        // Clear existing options
        this.selectAreaCode.innerHTML = '';
        
        // Add new options
        areaCodeList.forEach((info) => {
            const option = document.createElement('option');
            option.value = info.areaCode;
            const displayName = this.getFilledAreaCode(info.areaCode) + '\u2002\u2002' + this.getLocalizedName(info.name, langCode);
            option.textContent = displayName;
            this.selectAreaCode.appendChild(option);
        });
    }

    startCountdown() {
        let currentTimeout = this.resendTimeout;
        const resendMsg = msg.localize('resendVerificationCode');
        const secondMsg = msg.localize('second');
        
        this.countdown = setInterval(() => {
            currentTimeout -= 1;
            if (currentTimeout <= 0) {
                this.stopCountdown();
                return;
            }
            this.btnSend.textContent = resendMsg + ' (' + currentTimeout.toString() + secondMsg + ')';
        }, 1000);
    }

    stopCountdown() {
        if (this.countdown !== null) {
            clearInterval(this.countdown);
            this.countdown = null;
            this.btnSend.textContent = msg.localize('resendVerificationCode');
            this.btnSend.disabled = false;
        }
    }

    checkInput() {
        if (this.inputPhoneNumber.value.trim() === "") {
            this.showError(msg.localize('phoneNumberIsEmpty'));
            return false;
        }
        return true;
    }

    onBtnSendClick() {
        if (!this.checkInput()) return;
        
        this.captcha.verify().then((data) => {
            this.btnSend.disabled = true;
            this.btnSend.textContent = msg.localize('sending');

            data.areaCode = this.areaCodeSelect.getValue();
            data.phoneNumber = this.inputPhoneNumber.value;

            fetch(this.realmUrl + '/sms/' + this.type + '-code', {
                method: 'POST',
                body: JSON.stringify(data),
                headers: { 'Content-Type': 'application/json' },
            }).then((res) => {
                if (res.ok) {
                    return res.json();
                } else {
                    throw new Error(msg.localize('sendVerificationError', [res.status + ' ' + res.statusText]));
                }
            }).then((res) => {
                if (res.status == 1) {
                    this.startCountdown();
                } else if (res.status == 0) {
                    throw new Error(res.errormsg ? msg.localize(res.errormsg, [res.error]) : res.error);
                }
            }).catch((err) => {
                console.error(err);
                this.showError(err.message);

                this.btnSend.disabled = false;
                this.btnSend.textContent = msg.localize('sendVerificationCode');
            });
        }).catch((err) => {
            if (err !== 'close') { // User closed captcha
                console.error(err);
                this.showError(typeof err === 'string' ? err : err.message);
                this.btnSend.disabled = false;
                this.btnSend.textContent = msg.localize('sendVerificationCode');
            }
        });
    }
}

document.addEventListener('DOMContentLoaded', function () {
    // Initialize SMS sender form for login
    window.SmsSenderForm = new SmsSenderForm("login", "#kc-form-login");

    // Handle tab switching to set the login type
    document.addEventListener('pf.tab.activate', function(event) {
        const tabId = event.detail.tabId;
        let loginTypeInput = document.querySelector('#loginType');
        
        if (!loginTypeInput) {
            loginTypeInput = document.createElement('input');
            loginTypeInput.type = 'hidden';
            loginTypeInput.name = 'loginType';
            loginTypeInput.id = 'loginType';
            document.querySelector('#kc-form-login').appendChild(loginTypeInput);
        }
        
        loginTypeInput.value = tabId; // 'password' or 'phone'
    });

    // Set initial login type to password (default active tab)
    const initialLoginType = document.createElement('input');
    initialLoginType.type = 'hidden';
    initialLoginType.name = 'loginType';
    initialLoginType.id = 'loginType';
    initialLoginType.value = 'password';
    document.querySelector('#kc-form-login').appendChild(initialLoginType);
});