Stackyard

package scanner

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

	"stackyard/internal/config"
)

func TestScanFindsProjectsAndIgnoresLargeDirs(t *testing.T) {
	root := t.TempDir()

	mustWriteFile(t, filepath.Join(root, "service-a", "go.mod"), "module service-a\n")
	mustWriteFile(t, filepath.Join(root, "service-a", "README.md"), "# service-a\n")
	mustWriteFile(t, filepath.Join(root, "node_modules", "ignored", "package.json"), "{}")
	mustWriteFile(t, filepath.Join(root, "nested", "api", "pyproject.toml"), "[project]\nname='api'\n")

	s := New(config.ScannerConfig{
		MaxDepth:   2,
		IgnoreDirs: []string{"node_modules"},
	})

	results, err := s.Scan([]config.RootConfig{{Name: "DEV", Path: root}})
	if err != nil {
		t.Fatalf("scan: %v", err)
	}

	if len(results) != 2 {
		t.Fatalf("expected 2 projects, got %d", len(results))
	}

	foundTypes := map[string]bool{}
	for _, result := range results {
		foundTypes[result.PrimaryType] = true
	}
	if !foundTypes["go"] || !foundTypes["python"] {
		t.Fatalf("expected go and python projects, got %#v", foundTypes)
	}
}

func TestScanSkipsSymlinkedDirectories(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("symlink creation is not reliable on all Windows test setups")
	}

	root := t.TempDir()
	target := filepath.Join(root, "target")
	if err := os.MkdirAll(target, 0o755); err != nil {
		t.Fatalf("mkdir target: %v", err)
	}
	mustWriteFile(t, filepath.Join(target, "go.mod"), "module target\n")

	link := filepath.Join(root, "link-project")
	if err := os.Symlink(target, link); err != nil {
		t.Fatalf("symlink: %v", err)
	}

	s := New(config.ScannerConfig{MaxDepth: 2})
	results, err := s.Scan([]config.RootConfig{{Name: "DEV", Path: root}})
	if err != nil {
		t.Fatalf("scan: %v", err)
	}
	if len(results) != 1 {
		t.Fatalf("expected only real directory to be scanned, got %d", len(results))
	}
}

func TestScanStopsDescendingIntoDetectedProjects(t *testing.T) {
	root := t.TempDir()
	mustWriteFile(t, filepath.Join(root, "repo", "go.mod"), "module repo\n")
	mustWriteFile(t, filepath.Join(root, "repo", "nested", "package.json"), "{}\n")

	s := New(config.ScannerConfig{MaxDepth: 3})
	results, err := s.Scan([]config.RootConfig{{Name: "DEV", Path: root}})
	if err != nil {
		t.Fatalf("scan: %v", err)
	}
	if len(results) != 1 {
		t.Fatalf("expected only top-level project, got %d", len(results))
	}
}

func mustWriteFile(t *testing.T, path, body string) {
	t.Helper()
	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
		t.Fatalf("mkdir %s: %v", path, err)
	}
	if err := os.WriteFile(path, []byte(body), 0o644); err != nil {
		t.Fatalf("write %s: %v", path, err)
	}
}