import { useCallback, useState } from "react";
import { API_BASE } from "../api/client";

interface ApplyTextureResult {
  output_url: string;
  output_filename: string;
}

export function useApplyTexture() {
  const [isApplying, setIsApplying] = useState(false);
  const [resultUrl, setResultUrl] = useState<string | null>(null);
  const [error, setError] = useState<string | null>(null);

  const applyTexture = useCallback(
    async (filename: string, maskIndices: number[], textureName: string, originalFilename?: string) => {
      setIsApplying(true);
      setError(null);
      try {
        const res = await fetch(`${API_BASE}/seg/apply_texture`, {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify({
            filename,
            mask_indices: maskIndices,
            texture_name: textureName,
            original_filename: originalFilename ?? filename,
            direction_mode: "auto",
            angle_degrees: 0,
          }),
        });

        if (!res.ok) {
          const text = await res.text();
          throw new Error(text || `Error ${res.status}`);
        }

        const data: ApplyTextureResult = await res.json();
        setResultUrl(`${API_BASE}${data.output_url}`);
        return data;
      } catch (err) {
        const message = err instanceof Error ? err.message : "Error al aplicar textura";
        setError(message);
        throw new Error(message);
      } finally {
        setIsApplying(false);
      }
    },
    [],
  );

  const resetResult = useCallback(() => {
    setResultUrl(null);
    setError(null);
  }, []);

  return { applyTexture, isApplying, resultUrl, error, resetResult };
}