"use client";

import {useState, useLayoutEffect} from "react";
import { useRouter } from 'next/navigation';
import { signIn } from "next-auth/react";
import clsx from "clsx";
import { useForm, Controller } from "react-hook-form";
import { EMAIL_REGEX, IS_VALID_INPUT, IS_VALID_FULL_PHONE } from "@utils/constants";
import {mergeCartAction} from "@/actions/mergeCartAction";
import { useAppDispatch } from "@/store/hooks";
import { updateCart } from "@/store/slices/cart-slice";
import { useCustomToast } from "@/utils/hooks/useToast";
import { useUserRegister } from "@/utils/hooks/useUserRegister";
import { overlayLoading } from "@/components/theme/ui/kernel/loading/api";
import { formatCartDetail } from "@/utils/cartDetailTools";
import {CartDetail} from "@/types/cart/type";
import CommonModal from "@/components/theme/ui/CommonModal";
import InputText from "@/components/theme/ui/InputText";
import PasswordInput from "@/components/theme/ui/PasswordInput";
import PhoneNumberInput from "@/components/theme/ui/PhoneNumberInput/PhoneNumberInput";

type TabFlag = "login"|"register";

interface LoginFormData {
    username:string;
    password:string;
}
interface RegisterFormData {
    firstName: string;
    lastName: string;
    email: string;
    password: string;
    confirmPassword: string;
    phone: string;
    subscribedToNewsLetter: boolean;
    isAgree: boolean;
}
export interface LoginModalReult {
    loginSuccess: boolean;
    registerSuccess: boolean;
    mergeCartSuccess: boolean;
    cartAfterMerge: CartDetail | null; 
    msg: string;
}

export default function LoginModal({
    isShow,
    callbackUrl,
    closeModal,
    onFinalResult = async () => {},
}: {
    isShow: boolean;
    callbackUrl?: string
    closeModal: (bool: boolean) => void;
    onFinalResult?: (param: LoginModalReult) =>void | Promise<void>;
}) {
    const router = useRouter();
    const dispatch = useAppDispatch();
    const {userRegister} = useUserRegister();
    const { showToast } = useCustomToast();
    const loginForm = useForm({
        mode: "onChange",
        reValidateMode: "onChange",
        defaultValues: {
            username: '',
            password: ''
        } 
    });
    const registerForm = useForm({
        mode: "onChange",
        reValidateMode: "onChange", 
        defaultValues: {
            firstName: '',
            lastName: '',
            email: '',
            password: '',
            confirmPassword: '',
            phone: '',
            subscribedToNewsLetter: true,
            isAgree: true
        }
    });
    const [activeTab, setActiveTab] = useState<TabFlag>('login');


    useLayoutEffect(() => {
        if(isShow) {
            loginForm.reset();
            registerForm.reset();
        }
    },[isShow]);

    const toggleLoginRegister = (tab: TabFlag) => {
        setActiveTab(tab);
    };

    const toSignin = async (data: {username:string;password:string;flag:'login'|'register';}) => {
        const result = await signIn("credentials", {
            redirect: false,
            username: data.username,
            password: data.password,
            callbackUrl
        });
        const finalRes: LoginModalReult = {
            loginSuccess: false,
            registerSuccess: data.flag === "register" ? true : false,
            mergeCartSuccess: false,
            cartAfterMerge: null,
            msg: ''
        };
        if (!result?.ok) { // 登录失败
            let txt = '';
            if(finalRes.registerSuccess) {
                txt = "Register Successfully! But fail to login: " + result?.error;
            } else {
                txt = result?.error || "Fail to login.";
            }
            showToast(txt, "danger");
            finalRes.msg = txt;
            onFinalResult(finalRes);
            return;
        }
        // 登录成功
        finalRes.loginSuccess = true;
        showToast("Successfully logged in.", "success");
        // 合并购物车
        const mergeRes = await mergeCartAction();
        finalRes.mergeCartSuccess = mergeRes.success;
        finalRes.cartAfterMerge = mergeRes.cartDetail;
        console.log('cartAfterMerge ========', mergeRes);
        if(mergeRes.cartDetail) {
            const newCartDetail = formatCartDetail(mergeRes.cartDetail);

            dispatch(updateCart(newCartDetail));
        }
        await onFinalResult(finalRes);
        
        // 关闭登录弹窗
        closeModal(false);
        if(callbackUrl){
            router.push(callbackUrl); // 跳转指定页面
        }else{
            router.refresh(); // 当前页面重新渲染
        }
    };

    const loginSubmit = async (data:LoginFormData) => {
        console.log(data);
        overlayLoading.start();
        await toSignin({
            username: data.username,
            password: data.password,
            flag: 'login'
        });
        overlayLoading.stop();
    };

    const registerSubmit = async (registerData: RegisterFormData) => {
        console.log(registerData);
        overlayLoading.start();
        const registerRes = await userRegister({
            input: {
                firstName: registerData.firstName,
                lastName: registerData.lastName,
                email: registerData.email,
                password: registerData.password,
                confirmPassword: registerData.confirmPassword,
                phone: registerData.phone,
                subscribedToNewsLetter: registerData.subscribedToNewsLetter
            }
        });
        if(!registerRes.error) {
            // 注册成功，登录
            await toSignin({
                username: registerData.email,
                password: registerData.password,
                flag: 'register'
            });
            overlayLoading.stop();


        } else {
            overlayLoading.stop();
            showToast("Fail to register: " + registerRes.msg, "danger");
            onFinalResult({
                loginSuccess: false,
                registerSuccess: false,
                mergeCartSuccess: false,
                cartAfterMerge: null,
                msg: registerRes.msg
            })
        }

    };
    return (<>
        <CommonModal 
            isOpen={isShow}
            onClose={closeModal}
            header={
                <div className="relative flex justify-center items-center pt-6 px-4 pb-4">
                    <button 
                        className={clsx("flex-none",{
                            "text-ly-18 font-bold": activeTab === "register",
                            "text-ly-16 font-media text-ly-deepgray": activeTab !== "register"
                        })}
                        onClick={() => toggleLoginRegister("register")}
                    >
                        Register
                    </button>
                    <span className="flex-none w-0.5 h-4.5 bg-ly-deepgray mx-5"></span>
                    <button 
                         className={clsx("flex-none",{
                            "text-ly-18 font-bold": activeTab === "login",
                            "text-ly-16 font-media text-ly-deepgray": activeTab !== "login"
                        })}
                        onClick={() => toggleLoginRegister("login")}
                    >
                        Sign in
                    </button>

                    <button className="absolute top-4 right-4 w-6 h-6" onClick={() => closeModal(false)}>
                        <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" strokeWidth="1.5" stroke="currentColor" aria-hidden="true" data-slot="icon" className="h-6 transition-all ease-in-out hover:scale-110"><path strokeLinecap="round" strokeLinejoin="round" d="M6 18 18 6M6 6l12 12"></path></svg>
                    </button>
                </div>
            }
            body={
                <>
                    <form 
                        className={clsx("relative px-4 pt-2 pb-6",{
                            "hidden": activeTab !== 'register'
                        })} 
                        onSubmit={registerForm.handleSubmit(registerSubmit)}
                    >
                        
                        <div className="w-full flex justify-between">
                            <div className="w-41.25 flex-none">
                                <label className="text-ly-12 block mb-3 font-semibold">
                                    First Name *
                                </label>
                                <InputText
                                    type="text"
                                    placeholder="First Name"
                                    {...registerForm.register("firstName", {
                                        required: "First name is required",
                                        pattern: {
                                            value: IS_VALID_INPUT,
                                            message: "Invalid First Name",
                                        }
                                    })}
                                    error={registerForm.formState.errors.firstName && registerForm.formState.errors.firstName.message as string}
                                />
                            </div>
                            <div className="w-41.25 flex-none">
                                <label className="text-ly-12 block mb-3 font-semibold">
                                    Last Name *
                                </label>
                                <InputText
                                    type="text"
                                    placeholder="Last Name"
                                    {...registerForm.register("lastName", {
                                        required: "Last Name is required",
                                        pattern: {
                                            value: IS_VALID_INPUT,
                                            message: "Invalid Last Name",
                                        }
                                    })}
                                    error={registerForm.formState.errors.lastName && registerForm.formState.errors.lastName.message as string}
                                />
                            </div>

                        </div>
                        <div className="w-full mt-4">
                            <label className="text-ly-12 block mb-3 font-semibold">
                                Email *
                            </label>
                            <InputText
                                type="email"
                                placeholder="Enter your email address"
                                {...registerForm.register("email", {
                                    required: "Email is required",
                                    pattern: {
                                        value: EMAIL_REGEX,
                                        message: "Please enter a valid email address",
                                    }
                                })}
                                error={registerForm.formState.errors.email && registerForm.formState.errors.email.message as string}
                            />
                        </div>

                        <div className="w-full mt-4">
                            <label className="text-ly-12 block mb-3 font-semibold">
                                Password *
                            </label>
                            <PasswordInput
                                placeholder="Enter your password"
                                {...registerForm.register("password", {
                                    required: "Password is required",
                                    minLength: {
                                        value: 6,
                                        message: "Be at least 6 characters long",
                                    },
                                    validate: (value: string) => {
                                        const pass=value.trim(); /*strip leading and trailing spaces*/
                                        const res = pass.length>0 && pass.length < 6;
                                        if(res) {
                                            return 'Please enter 6 or more characters. Leading or trailing spaces will be ignored.';
                                        } 
                                        return true;
                                    },
                                })}
                                error={registerForm.formState.errors.password && registerForm.formState.errors.password.message as string}
                            />
                        </div>

                        <div className="w-full mt-4">
                            <label className="text-ly-12 block mb-3 font-semibold">
                               Confirm Password *
                            </label>
                            <PasswordInput
                                placeholder="Confirm password"
                                {...registerForm.register("confirmPassword", {
                                    required: "Confirm Password is required",
                                    minLength: {
                                        value: 6,
                                        message: "Be at least 6 characters long",
                                    },
                                    validate: (value: string, {password}) => {
                                        const pass = value.trim(); /*strip leading and trailing spaces*/
                                        const res = pass.length>0 && pass.length < 6;
                                        if(res) {
                                            return 'Please enter 6 or more characters. Leading or trailing spaces will be ignored.';
                                        } 
                                        if(pass !== password) {
                                            return 'The Confirm Passwords do not match the Password';
                                        }
                                        return true;
                                    },
                                })}
                                error={registerForm.formState.errors.confirmPassword && registerForm.formState.errors.confirmPassword.message as string}
                            />
                        </div>
                        <div className="w-full mt-4"> 
                            <label className="text-ly-12 block mb-3 font-semibold">Phone number *</label>
                            <Controller
                                name="phone"
                                control={registerForm.control}
                                rules={{
                                    required: "Phone Number is required",
                                    pattern: {
                                        value: IS_VALID_FULL_PHONE,
                                        message: "Invalid Phone Number",
                                    }
                                }}
                                render={({ field, fieldState }) => {
                                    return (
                                        <PhoneNumberInput 
                                            placeholder="Please Input Your Phone Number"
                                            value={field.value}
                                            onChange={field.onChange}
                                            onBlur={field.onBlur}
                                            name={field.name}
                                            ref={field.ref}
                                            error={fieldState.error?.message}
                                            
                                        />
                                    );
                                }}
                            />

                            
                        </div>

                        <button className="flex items-center justify-center mt-6 w-full h-12 bg-ly-green text-white rounded-3xl text-ly-16 font-bold">
                            Register
                        </button>
                        <div className="relative w-full mt-4">
 
                            <label htmlFor="is_agree" className="group relative flex">
                                <input type="checkbox"  
                                    id="is_agree" 
                                    className="absolute opacity-0" 
                                    {...registerForm.register("isAgree", {
                                        validate: (value: boolean) => {
                                            if(!value) {
                                                showToast('Please Agree To The Terms & Conditions And Privacy Policy.', "warning");
                                                return 'Please Agree To The Terms & Conditions And Privacy Policy.';
                                            } 
                                            return true;
                                        },
                                    })}
                                />
                                <span className="flex-none mr-2">
                                    <svg className="icon-unchecked block w-4 h-4 group-has-[:checked]:hidden" xmlns="http://www.w3.org/2000/svg" xmlnsXlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16" fill="none"><rect  x="1" y="1" width="14" height="14" rx="1"    fill="#FFFFFF" ></rect><path   fill="rgba(0, 0, 0, 1)"  d="M2 0.5L14 0.5C14.8284 0.5 15.5 1.17157 15.5 2L15.5 14C15.5 14.8284 14.8284 15.5 14 15.5L2 15.5C1.17157 15.5 0.5 14.8284 0.5 14L0.5 2C0.5 1.17157 1.17157 0.5 2 0.5ZM2 1.5C1.72386 1.5 1.5 1.72386 1.5 2L1.5 14C1.5 14.2761 1.72386 14.5 2 14.5L14 14.5C14.2761 14.5 14.5 14.2761 14.5 14L14.5 2C14.5 1.72386 14.2761 1.5 14 1.5L2 1.5Z"></path></svg>
                                    <svg className="icon-checked hidden w-4 h-4 group-has-[:checked]:block" xmlns="http://www.w3.org/2000/svg" xmlnsXlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16" fill="none"><rect  x="1" y="1" width="14" height="14" rx="1"    fill="#000000" ></rect><path    stroke="rgba(255, 255, 255, 1)" strokeWidth="1.5"  strokeLinecap="square"  d="M5.3335 8L7.3335 10L11.3335 6"></path></svg>
                                </span>
                                <span className="text-ly-12 text-[#666666]">
                                    I Agree To The 
                                    Terms & Conditions
                                    And 
                                    Privacy Policy
                                    Of  asteriahair.com
                                </span>
                                
                            </label>
                        </div>
                        <div className="relative w-full mt-4">
                            
                            <label htmlFor="is_subscribed" className="group relative flex">
                                <input type="checkbox" 
                                    id="is_subscribed" 
                                    className="absolute opacity-0"
                                    {...registerForm.register("subscribedToNewsLetter")}
                                />
                                <span className="flex-none mr-2">
                                    <svg className="icon-unchecked block w-4 h-4 group-has-[:checked]:hidden" xmlns="http://www.w3.org/2000/svg" xmlnsXlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16" fill="none"><rect  x="1" y="1" width="14" height="14" rx="1"    fill="#FFFFFF" ></rect><path   fill="rgba(0, 0, 0, 1)"  d="M2 0.5L14 0.5C14.8284 0.5 15.5 1.17157 15.5 2L15.5 14C15.5 14.8284 14.8284 15.5 14 15.5L2 15.5C1.17157 15.5 0.5 14.8284 0.5 14L0.5 2C0.5 1.17157 1.17157 0.5 2 0.5ZM2 1.5C1.72386 1.5 1.5 1.72386 1.5 2L1.5 14C1.5 14.2761 1.72386 14.5 2 14.5L14 14.5C14.2761 14.5 14.5 14.2761 14.5 14L14.5 2C14.5 1.72386 14.2761 1.5 14 1.5L2 1.5Z"></path></svg>
                                    <svg className="icon-checked hidden w-4 h-4 group-has-[:checked]:block" xmlns="http://www.w3.org/2000/svg" xmlnsXlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16" fill="none"><rect  x="1" y="1" width="14" height="14" rx="1"    fill="#000000" ></rect><path    stroke="rgba(255, 255, 255, 1)" strokeWidth="1.5"  strokeLinecap="square"  d="M5.3335 8L7.3335 10L11.3335 6"></path></svg>
                                </span>
                                <span className="text-ly-12 text-[#666666]">I'd Like To Receive Emails Or Sms With Exclusive Discounts And News Fromaupearlhair.</span>
                                                
                            </label>
                        </div>

                    </form>


                    <form 
                        className={clsx("relative px-4 pt-2",{
                            "hidden": activeTab !== "login"
                        })} 
                        onSubmit={loginForm.handleSubmit(loginSubmit)}
                    >
                    
                        <div className="w-full">
                            <label className="text-ly-12 block mb-3 font-semibold">
                                Email *
                            </label>
                            <InputText
                                type="email"
                                placeholder="Enter your email address"
                                {...loginForm.register("username", {
                                    required: "Email is required",
                                    pattern: {
                                        value: EMAIL_REGEX,
                                        message: "Please enter a valid email address",
                                    }
                                })}
                                error={loginForm.formState.errors.username && loginForm.formState.errors.username.message as string}
                            />
                        </div>
                        <div className="w-full mt-4">
                            <label className="text-ly-12 block mb-3 font-semibold">
                                Password *
                            </label>
                            <PasswordInput
                                placeholder="Enter your password"
                                {...loginForm.register("password", {
                                    required: "Password is required",
                                    minLength: {
                                        value: 6,
                                        message: "Be at least 6 characters long",
                                    },
                                    validate: (value: string) => {
                                        const pass=value.trim(); /*strip leading and trailing spaces*/
                                        const res = pass.length>0 && pass.length < 6;
                                        if(res) {
                                            return 'Please enter 6 or more characters. Leading or trailing spaces will be ignored.';
                                        } 
                                        return true;
                                    },
                                })}
                                error={loginForm.formState.errors.password && loginForm.formState.errors.password.message as string}
                            />
                        </div>
                        
                        <button className="flex items-center justify-center mt-6 w-full h-12 bg-ly-green text-white rounded-3xl text-ly-16 font-bold">Log In</button>
                        
                    </form>
                </>
            }
        />
    </>);
}