"use client";

import { useActionState, useEffect, useState } from "react";
import { ArrowRight, UserPlus, LoaderCircle } from "lucide-react";
import { loginAction, changePasswordAction, addUserAction, type FormState } from "@/app/actions/auth";
import { STARTER_PASSWORD } from "@/lib/auth-policy";
import { PasswordField, inputClass } from "./PasswordField";

function Feedback({ state }: { state: FormState }) {
  return <>
    {state.error && <p role="alert" className="rounded-xl border border-[#D1495B]/20 bg-[#D1495B]/5 p-3 text-sm leading-relaxed text-[#D1495B]">{state.error}</p>}
    {state.success && <p role="status" className="break-words rounded-xl border border-[#00798C]/20 bg-[#00798C]/5 p-3 text-sm leading-relaxed text-[#00798C] dark:text-[#00A6BE]">{state.success}</p>}
  </>;
}

function Submit({ pending, children, adding = false }: { pending: boolean; children: React.ReactNode; adding?: boolean }) {
  return <button type="submit" disabled={pending}
    className="flex min-h-12 w-full items-center justify-center gap-2 rounded-xl bg-[#30638E] px-5 py-3 text-sm font-semibold text-white transition hover:bg-[#003D5B] focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[#30638E] disabled:cursor-wait disabled:opacity-60">
    {pending ? <LoaderCircle className="h-4 w-4 animate-spin" /> : adding ? <UserPlus className="h-4 w-4" /> : null}
    {pending ? "Please wait…" : children}
    {!pending && !adding && <ArrowRight className="h-4 w-4" />}
  </button>;
}

export function LoginForm({clock=false}:{clock?:boolean}={}) {
  const [state, action, pending] = useActionState(loginAction, {});
  const [email, setEmail] = useState("");
  return <form action={action} className="space-y-5">
    {clock&&<input type="hidden" name="clock" value="1"/>}
    <div>
      <label htmlFor="email" className="mb-2 block text-sm font-medium">Email address</label>
      <input id="email" name="email" type="email" autoComplete="username" value={email} onChange={(event) => setEmail(event.target.value)} required maxLength={254} className={inputClass} placeholder="you@company.com" />
    </div>
    <PasswordField name="password" label="Password" autoComplete="current-password" />
    <Feedback state={state} />
    <Submit pending={pending}>Sign in</Submit>
    <p className="text-center text-xs leading-relaxed text-gray-500 dark:text-gray-400">Use the account your team has created for you.</p>
  </form>;
}

export function ChangePasswordForm({clock=false}:{clock?:boolean}={}) {
  const [state, action, pending] = useActionState(changePasswordAction, {});
  return <form action={action} className="space-y-5">
    {clock&&<input type="hidden" name="clock" value="1"/>}
    <PasswordField name="password" label="Your new password" autoComplete="new-password" minLength={8}
      hint="At least 8 characters. No uppercase letters, numbers or special characters required." />
    <PasswordField name="confirmation" label="Confirm new password" autoComplete="new-password" minLength={8} />
    <Feedback state={state} />
    <Submit pending={pending}>Save password & continue</Submit>
  </form>;
}

export function AddUserForm() {
  const [state, action, pending] = useActionState(addUserAction, {});
  const [name, setName] = useState("");
  const [email, setEmail] = useState("");
  useEffect(() => { if (state.success) { setName(""); setEmail(""); } }, [state]);
  return <form action={action} className="space-y-5">
    <div>
      <label htmlFor="name" className="mb-2 block text-sm font-medium">Full name</label>
      <input id="name" name="name" value={name} onChange={(event) => setName(event.target.value)} autoComplete="off" required className={inputClass} placeholder="Person's name" />
    </div>
    <div>
      <label htmlFor="email" className="mb-2 block text-sm font-medium">Email address</label>
      <input id="email" name="email" type="email" value={email} onChange={(event) => setEmail(event.target.value)} autoComplete="off" required maxLength={254} className={inputClass} placeholder="person@company.com" />
    </div>
    <div>
      <label htmlFor="access" className="mb-2 block text-sm font-medium">Access</label>
      <select id="access" name="access" defaultValue="full" className={inputClass}>
        <option value="full">Full — main app and clock app</option>
        <option value="clock">Clock-in user — clock app only</option>
        <option value="mechanic">Mechanic — Fuel and Job cards only</option>
        <option value="office">Office — Slips only</option>
      </select>
    </div>
    <div>
      <label htmlFor="starter" className="mb-2 block text-sm font-medium">Starter password</label>
      <input id="starter" value={STARTER_PASSWORD} readOnly className={`${inputClass} font-mono bg-gray-50`} aria-describedby="starter-hint" />
      <p id="starter-hint" className="mt-2 text-xs leading-relaxed text-gray-500 dark:text-gray-400">They'll choose their own password when they first sign in.</p>
    </div>
    <Feedback state={state} />
    <Submit pending={pending} adding>Add user</Submit>
  </form>;
}