package api

import (
	"fmt"
	"os/exec"
	"path/filepath"
	"strings"
)

// resolveBlenderBinaryPath resolves a Blender executable to an absolute path.
func resolveBlenderBinaryPath(blenderBinary string) (string, error) {
	if blenderBinary == "" {
		return "", fmt.Errorf("blender binary path is empty")
	}

	// Already contains a path component; normalize it.
	if strings.Contains(blenderBinary, string(filepath.Separator)) {
		absPath, err := filepath.Abs(blenderBinary)
		if err != nil {
			return "", fmt.Errorf("failed to resolve blender binary path %q: %w", blenderBinary, err)
		}
		return absPath, nil
	}

	// Bare executable name, resolve via PATH.
	resolvedPath, err := exec.LookPath(blenderBinary)
	if err != nil {
		return "", fmt.Errorf("failed to locate blender binary %q in PATH: %w", blenderBinary, err)
	}
	absPath, err := filepath.Abs(resolvedPath)
	if err != nil {
		return "", fmt.Errorf("failed to resolve blender binary path %q: %w", resolvedPath, err)
	}
	return absPath, nil
}