package project

import (
	"os"
	"path/filepath"
	"testing"
)

func TestTopDataAssetsDirDiscoversSiblingRepo(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))

	parentDir := filepath.Dir(root)
	siblingPath := filepath.Join(parentDir, "sow-assets")
	mkdirAll(t, siblingPath)
	mkdirAll(t, filepath.Join(siblingPath, "assets", "part", "belt"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{
				Assets: "sow-assets",
			},
		},
	}

	result := proj.TopDataAssetsDir()
	if result != siblingPath {
		t.Errorf("expected %s, got %s", siblingPath, result)
	}
}

func TestTopDataAssetsDirPrefersExplicitConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))
	mkdirAll(t, filepath.Join(root, "custom-assets"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module: ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:  PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{
				Assets: "custom-assets",
			},
		},
	}

	result := proj.TopDataAssetsDir()
	expected := filepath.Join(root, "custom-assets")
	if result != expected {
		t.Errorf("expected %s, got %s", expected, result)
	}
}

func TestTopDataAssetsDirReturnsEmptyForNoConfig(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "src"))
	mkdirAll(t, filepath.Join(root, "assets"))
	mkdirAll(t, filepath.Join(root, "build"))

	proj := &Project{
		Root: root,
		Config: Config{
			Module:  ModuleConfig{Name: "Test", ResRef: "test"},
			Paths:   PathConfig{Source: "src", Assets: "assets", Build: "build"},
			TopData: TopDataConfig{},
		},
	}

	result := proj.TopDataAssetsDir()
	if result != "" {
		t.Errorf("expected empty string, got %s", result)
	}
}

func mkdirAll(t *testing.T, path string) {
	t.Helper()
	if err := os.MkdirAll(path, 0o755); err != nil {
		t.Fatalf("mkdir %s: %v", path, err)
	}
}