"use client";

import { useRouter } from "next/navigation";
import { useState, type FormEvent } from "react";
import { createClient } from "@/lib/supabase/client";
import { Avatar } from "@/components/avatar";
import { AvatarPicker } from "@/components/avatar-picker";

function mapError(message: string): string {
  if (message.includes("duplicate key")) {
    return "Ce pseudo est déjà pris.";
  }
  if (message.includes("pseudo is locked")) {
    return "Ton pseudo est déjà figé, contacte un Archonte.";
  }
  return "Une erreur est survenue, réessaie.";
}

export function ProfileForm({
  userId,
  isJudge,
  initialPseudo,
  initialAvatarUrl,
  initialPseudoLocked,
}: {
  userId: string;
  isJudge: boolean;
  initialPseudo: string;
  initialAvatarUrl: string | null;
  initialPseudoLocked: boolean;
}) {
  const router = useRouter();
  const [pseudo, setPseudo] = useState(initialPseudo);
  const [pseudoLocked, setPseudoLocked] = useState(initialPseudoLocked);
  const [avatarUrl, setAvatarUrl] = useState(initialAvatarUrl);
  const [avatarBlob, setAvatarBlob] = useState<Blob | null>(null);
  const [avatarPreview, setAvatarPreview] = useState<string | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [success, setSuccess] = useState(false);
  const [loading, setLoading] = useState(false);

  const pseudoChanged = pseudo.trim() !== initialPseudo;
  const canEditPseudo = !pseudoLocked || isJudge;

  function handleCropped(blob: Blob) {
    setAvatarBlob(blob);
    setAvatarPreview(URL.createObjectURL(blob));
  }

  async function handleSubmit(event: FormEvent) {
    event.preventDefault();
    setError(null);
    setSuccess(false);

    const trimmedPseudo = pseudo.trim();
    if (!trimmedPseudo) {
      setError("Choisis un pseudo valide.");
      return;
    }

    setLoading(true);
    const supabase = createClient();

    let nextAvatarUrl = avatarUrl;

    if (avatarBlob) {
      const path = `${userId}.webp`;
      const { error: uploadError } = await supabase.storage
        .from("avatars")
        .upload(path, avatarBlob, { upsert: true, contentType: "image/webp" });

      if (uploadError) {
        setLoading(false);
        setError("Impossible d'envoyer la photo, réessaie.");
        return;
      }

      const { data: publicUrlData } = supabase.storage.from("avatars").getPublicUrl(path);
      nextAvatarUrl = `${publicUrlData.publicUrl}?t=${Date.now()}`;
    }

    const { error: updateError } = await supabase
      .from("profiles")
      .update({ pseudo: trimmedPseudo, avatar_url: nextAvatarUrl })
      .eq("id", userId);

    setLoading(false);

    if (updateError) {
      setError(mapError(updateError.message));
      return;
    }

    setAvatarUrl(nextAvatarUrl);
    setAvatarBlob(null);
    setAvatarPreview(null);
    setSuccess(true);
    if (pseudoChanged && !isJudge) {
      setPseudoLocked(true);
    }
    router.refresh();
  }

  return (
    <form onSubmit={handleSubmit} className="flex flex-col gap-4">
      <div className="flex flex-col items-center gap-3">
        <Avatar pseudo={pseudo || "?"} avatarUrl={avatarPreview ?? avatarUrl} size="lg" />
        <AvatarPicker label="Changer la photo" onCropped={handleCropped} />
      </div>

      <div className="flex flex-col gap-1">
        <label htmlFor="pseudo" className="text-sm font-medium text-text-marble">
          Pseudo
        </label>
        <input
          id="pseudo"
          type="text"
          required
          disabled={!canEditPseudo}
          value={pseudo}
          onChange={(event) => setPseudo(event.target.value)}
          className="rounded-md border border-gold/30 bg-white/50 px-3 py-2 text-text-marble outline-none focus:border-gold disabled:bg-gold/5 disabled:text-text-mut"
        />
        {!canEditPseudo && (
          <p className="text-xs text-text-mut">
            Pseudo figé — contacte un Archonte pour le changer.
          </p>
        )}
      </div>

      {error && (
        <p role="alert" className="text-sm text-oxblood">
          {error}
        </p>
      )}
      {success && <p className="text-sm text-olive">Profil mis à jour.</p>}

      <button
        type="submit"
        disabled={loading}
        className="mt-2 rounded-md bg-ink-2 px-4 py-2 font-heading text-sm tracking-wide text-gold-bright uppercase transition hover:bg-ink disabled:opacity-50"
      >
        {loading ? "Enregistrement…" : "Enregistrer"}
      </button>
    </form>
  );
}