import type { MetaFunction } from "@remix-run/node"
import { Link, useLocation } from "@remix-run/react"
import { z } from "zod"
import { Button } from "~/components/ui/button"
import logoPng from "~/images/lume-logo.png?url"
import lumeColorLogoPng from "~/images/lume-color-logo.png?url"
import discordLogoPng from "~/images/discord-logo.png?url"
import lumeBgPng from "~/images/lume-bg-image.png?url"
import { Field, FieldCheckbox } from "~/components/forms"
import { getFormProps, useForm } from "@conform-to/react"
import { getZodConstraint, parseWithZod } from "@conform-to/zod"

export const meta: MetaFunction = () => {
  return [
    { title: "Login" },
    { name: "description", content: "Welcome to Lume!" }
  ]
}

export default function Login() {
  const location = useLocation()
  const hash = location.hash

  return (
    <div className="p-10 h-screen relative">
      <header>
        <img src={logoPng} alt="Lume logo" className="h-10" />
      </header>
      <div className="fixed inset-0 -z-10 overflow-clip">
        <img
          src={lumeBgPng}
          alt="Lume background"
          className="absolute top-0 right-0 md:w-2/3 object-cover z-[-1]"
        />
      </div>

      {hash === "" && <LoginForm />}
      {hash === "#otp" && <OtpForm />}

      <footer className="my-5">
        <ul className="flex flex-row">
          <li>
            <Link to="https://discord.lumeweb.com">
              <Button
                variant={"link"}
                className="flex flex-row gap-x-2 text-input-placeholder"
              >
                <img className="h-5" src={discordLogoPng} alt="Discord Logo" />
                Connect with us
              </Button>
            </Link>
          </li>
          <li>
            <Link to="https://lumeweb.com">
              <Button
                variant={"link"}
                className="flex flex-row gap-x-2 text-input-placeholder"
              >
                <img className="h-5" src={lumeColorLogoPng} alt="Lume Logo" />
                Connect with us
              </Button>
            </Link>
          </li>
        </ul>
      </footer>
    </div>
  )
}

const LoginSchema = z.object({
  email: z.string().email(),
  password: z.string(),
  rememberMe: z.boolean()
})

const LoginForm = () => {
  const [form, fields] = useForm({
    id: "login",
    constraint: getZodConstraint(LoginSchema),
    onValidate({ formData }) {
      return parseWithZod(formData, { schema: LoginSchema })
    },
    shouldValidate: "onSubmit"
  })

  return (
    <form
      className="w-full p-2 max-w-md space-y-3 mt-12 bg-background"
      {...getFormProps(form)}
    >
      <h2 className="text-3xl font-bold !mb-12">Welcome back! 🎉</h2>
      <Field
        inputProps={{ name: fields.email.name }}
        labelProps={{ children: "Email" }}
        errors={fields.email.errors}
      />
      <Field
        inputProps={{ name: fields.password.name, type: "password" }}
        labelProps={{ children: "Password" }}
        errors={fields.password.errors}
      />
      <FieldCheckbox
        inputProps={{ name: fields.rememberMe.name, form: form.id }}
        labelProps={{ children: "Remember Me" }}
        errors={fields.rememberMe.errors}
      />
      <Button className="w-full h-14">Login</Button>
      <p className="inline-block text-input-placeholder">
        Forgot your password?{" "}
        <Link
          to="/reset-password"
          className="text-primary-1 text-md hover:underline hover:underline-offset-4"
        >
          Reset Password
        </Link>
      </p>
      <Link to="/sign-up" className="block">
        <Button type="button" className="w-full h-14" variant={"outline"}>
          Create an Account
        </Button>
      </Link>
    </form>
  )
}

const OtpSchema = z.object({
  otp: z.string().length(6, { message: "OTP must be 6 characters" })
})

const OtpForm = () => {
  // TODO: Add support for resending the OTP
  const [form, fields] = useForm({
    id: "otp",
    constraint: getZodConstraint(OtpSchema),
    onValidate({ formData }) {
      return parseWithZod(formData, { schema: OtpSchema })
    },
    shouldValidate: "onSubmit"
  })
  const valid = false // TODO: some sort of logic to verify user is on OTP state validly

  if (!valid) {
    location.hash = ""
    return null
  }

  return (
    <form
      className="w-full p-2 max-w-md mt-12 bg-background"
      {...getFormProps(form)}
    >
      <span className="block !mb-8 space-y-2">
        <h2 className="text-3xl font-bold">Check your inbox</h2>
        <p className="text-input-placeholder">
          We will need the six digit confirmation code you received in your
          email in order to verify your account and get started. Didn’t receive
          a code?{" "}
          <Button type="button" variant={"link"} className="text-md h-0">
            Resend now →
          </Button>
        </p>
      </span>
      <Field
        inputProps={{ name: fields.otp.name }}
        labelProps={{ children: "Confirmation Code" }}
        errors={fields.otp.errors}
      />
      <Button className="w-full h-14">Verify</Button>
      <p className="text-input-placeholder w-full text-left">
        <Link
          to="/login"
          className="text-primary-1 text-md hover:underline hover:underline-offset-4"
        >
          ← Back to Login
        </Link>
      </p>
    </form>
  )
}