"use client";

import { FormEvent, useEffect, useMemo, useState } from "react";
import { observer } from "mobx-react-lite";
import Image from "next/image";
import Link from "next/link";
import { useRouter, useSearchParams } from "next/navigation";
// icons
import { useTheme } from "next-themes";
import { Eye, EyeOff } from "lucide-react";
// ui
import { Button, Input, TOAST_TYPE, setToast } from "@plane/ui";
// components
import { PasswordStrengthMeter } from "@/components/account";
// helpers
import { EPageTypes } from "@/helpers/authentication.helper";
import { getPasswordStrength } from "@/helpers/password.helper";
// hooks
import { useUser } from "@/hooks/store";
// wrappers
import { AuthenticationWrapper } from "@/lib/wrappers";
// services
// images
import PlaneBackgroundPatternDark from "@/public/auth/background-pattern-dark.svg";
import PlaneBackgroundPattern from "@/public/auth/background-pattern.svg";
import BlackHorizontalLogo from "@/public/plane-logos/black-horizontal-with-blue-logo.png";
import WhiteHorizontalLogo from "@/public/plane-logos/white-horizontal-with-blue-logo.png";
import { AuthService } from "@/services/auth.service";

type TResetPasswordFormValues = {
  email: string;
  password: string;
  confirm_password?: string;
};

const defaultValues: TResetPasswordFormValues = {
  email: "",
  password: "",
};

// services
const authService = new AuthService();

const SetPasswordPage = observer(() => {
  // router
  const router = useRouter();
  // search params
  const searchParams = useSearchParams();
  const email = searchParams.get("email");
  // states
  const [showPassword, setShowPassword] = useState({
    password: false,
    retypePassword: false,
  });
  const [passwordFormData, setPasswordFormData] = useState<TResetPasswordFormValues>({
    ...defaultValues,
    email: email ? email.toString() : "",
  });
  const [csrfToken, setCsrfToken] = useState<string | undefined>(undefined);
  const [isPasswordInputFocused, setIsPasswordInputFocused] = useState(false);
  const [isRetryPasswordInputFocused, setIsRetryPasswordInputFocused] = useState(false);
  // hooks
  const { resolvedTheme } = useTheme();
  // hooks
  const { data: user, handleSetPassword } = useUser();

  useEffect(() => {
    if (csrfToken === undefined)
      authService.requestCSRFToken().then((data) => data?.csrf_token && setCsrfToken(data.csrf_token));
  }, [csrfToken]);

  const handleShowPassword = (key: keyof typeof showPassword) =>
    setShowPassword((prev) => ({ ...prev, [key]: !prev[key] }));

  const handleFormChange = (key: keyof TResetPasswordFormValues, value: string) =>
    setPasswordFormData((prev) => ({ ...prev, [key]: value }));

  const isButtonDisabled = useMemo(
    () =>
      !!passwordFormData.password &&
      getPasswordStrength(passwordFormData.password) >= 3 &&
      passwordFormData.password === passwordFormData.confirm_password
        ? false
        : true,
    [passwordFormData]
  );

  const handleSubmit = async (e: FormEvent<HTMLFormElement>) => {
    try {
      e.preventDefault();
      if (!csrfToken) throw new Error("csrf token not found");
      await handleSetPassword(csrfToken, { password: passwordFormData.password });
      router.push("/");
    } catch (err: any) {
      setToast({
        type: TOAST_TYPE.ERROR,
        title: "Error!",
        message: err?.error ?? "Something went wrong. Please try again.",
      });
    }
  };

  const password = passwordFormData?.password ?? "";
  const confirmPassword = passwordFormData?.confirm_password ?? "";
  const renderPasswordMatchError = !isRetryPasswordInputFocused || confirmPassword.length >= password.length;

  const logo = resolvedTheme === "light" ? BlackHorizontalLogo : WhiteHorizontalLogo;

  return (
    <AuthenticationWrapper pageType={EPageTypes.SET_PASSWORD}>
      <div className="relative w-screen h-screen overflow-hidden">
        <div className="absolute inset-0 z-0">
          <Image
            src={resolvedTheme === "dark" ? PlaneBackgroundPatternDark : PlaneBackgroundPattern}
            className="w-full h-full object-cover"
            alt="Plane background pattern"
          />
        </div>
        <div className="relative z-10 w-screen h-screen overflow-hidden overflow-y-auto flex flex-col">
          <div className="container mx-auto px-10 lg:px-0 flex-shrink-0 relative flex items-center justify-between pb-4 transition-all">
            <div className="flex items-center gap-x-2 py-10">
              <Link href={`/`} className="h-[30px] w-[133px]">
                <Image src={logo} alt="Plane logo" />
              </Link>
            </div>
          </div>
          <div className="flex-grow container mx-auto max-w-lg px-10 lg:max-w-md lg:px-5 py-10 lg:pt-28 transition-all">
            <div className="relative flex flex-col space-y-6">
              <div className="text-center space-y-1 py-4">
                <h3 className="flex gap-4 justify-center text-3xl font-bold text-onboarding-text-100">
                  Secure your account
                </h3>
                <p className="font-medium text-onboarding-text-400">Setting password helps you login securely</p>
              </div>
              <form className="mt-5 space-y-4" onSubmit={(e) => handleSubmit(e)}>
                <div className="space-y-1">
                  <label className="text-sm text-onboarding-text-300 font-medium" htmlFor="email">
                    Email
                  </label>
                  <div className="relative flex items-center rounded-md bg-onboarding-background-200">
                    <Input
                      id="email"
                      name="email"
                      type="email"
                      value={user?.email}
                      //hasError={Boolean(errors.email)}
                      placeholder="name@company.com"
                      className="h-[46px] w-full border border-onboarding-border-100 !bg-onboarding-background-200 pr-12 text-onboarding-text-400 cursor-not-allowed"
                      disabled
                    />
                  </div>
                </div>
                <div className="space-y-1">
                  <label className="text-sm text-onboarding-text-300 font-medium" htmlFor="password">
                    Set a password
                  </label>
                  <div className="relative flex items-center rounded-md bg-onboarding-background-200">
                    <Input
                      type={showPassword.password ? "text" : "password"}
                      name="password"
                      value={passwordFormData.password}
                      onChange={(e) => handleFormChange("password", e.target.value)}
                      //hasError={Boolean(errors.password)}
                      placeholder="Enter password"
                      className="h-[46px] w-full border border-onboarding-border-100 !bg-onboarding-background-200 pr-12 placeholder:text-onboarding-text-400"
                      minLength={8}
                      onFocus={() => setIsPasswordInputFocused(true)}
                      onBlur={() => setIsPasswordInputFocused(false)}
                      autoFocus
                    />
                    {showPassword.password ? (
                      <EyeOff
                        className="absolute right-3 h-5 w-5 stroke-custom-text-400 hover:cursor-pointer"
                        onClick={() => handleShowPassword("password")}
                      />
                    ) : (
                      <Eye
                        className="absolute right-3 h-5 w-5 stroke-custom-text-400 hover:cursor-pointer"
                        onClick={() => handleShowPassword("password")}
                      />
                    )}
                  </div>
                  {isPasswordInputFocused && <PasswordStrengthMeter password={passwordFormData.password} />}
                </div>
                <div className="space-y-1">
                  <label className="text-sm text-onboarding-text-300 font-medium" htmlFor="confirm_password">
                    Confirm password
                  </label>
                  <div className="relative flex items-center rounded-md bg-onboarding-background-200">
                    <Input
                      type={showPassword.retypePassword ? "text" : "password"}
                      name="confirm_password"
                      value={passwordFormData.confirm_password}
                      onChange={(e) => handleFormChange("confirm_password", e.target.value)}
                      placeholder="Confirm password"
                      className="h-[46px] w-full border border-onboarding-border-100 !bg-onboarding-background-200 pr-12 placeholder:text-onboarding-text-400"
                      onFocus={() => setIsRetryPasswordInputFocused(true)}
                      onBlur={() => setIsRetryPasswordInputFocused(false)}
                    />
                    {showPassword.retypePassword ? (
                      <EyeOff
                        className="absolute right-3 h-5 w-5 stroke-custom-text-400 hover:cursor-pointer"
                        onClick={() => handleShowPassword("retypePassword")}
                      />
                    ) : (
                      <Eye
                        className="absolute right-3 h-5 w-5 stroke-custom-text-400 hover:cursor-pointer"
                        onClick={() => handleShowPassword("retypePassword")}
                      />
                    )}
                  </div>
                  {!!passwordFormData.confirm_password &&
                    passwordFormData.password !== passwordFormData.confirm_password &&
                    renderPasswordMatchError && <span className="text-sm text-red-500">Passwords don{"'"}t match</span>}
                </div>
                <Button type="submit" variant="primary" className="w-full" size="lg" disabled={isButtonDisabled}>
                  Continue
                </Button>
              </form>
            </div>
          </div>
        </div>
      </div>
    </AuthenticationWrapper>
  );
});

export default SetPasswordPage;