package main

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

func TestScannerCountsAndExcludes(t *testing.T) {
	root := t.TempDir()
	if err := os.WriteFile(filepath.Join(root, "main.go"), []byte("package main\n\n// note\nfunc main() {}\n"), 0644); err != nil {
		t.Fatal(err)
	}
	if err := os.Mkdir(filepath.Join(root, "node_modules"), 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(root, "node_modules", "bad.js"), []byte("alert(1)\n"), 0644); err != nil {
		t.Fatal(err)
	}
	langs, files, err := (Scanner{}).Analyze(context.Background(), root, []ExclusionRule{{Pattern: "node_modules"}}, func(int, string) {})
	if err != nil {
		t.Fatal(err)
	}
	if len(langs) != 1 || langs[0].Name != "Go" {
		t.Fatalf("unexpected languages: %#v", langs)
	}
	if langs[0].Code != 2 || langs[0].Comments != 1 || langs[0].Blanks != 1 {
		t.Fatalf("unexpected count: %#v", langs[0])
	}
	for _, f := range files {
		if f.Name == "bad.js" {
			t.Fatal("excluded file was scanned")
		}
	}
}

func TestWildcardMatch(t *testing.T) {
	cases := []struct {
		p, s string
		want bool
	}{{"*.log", "storage/app.log", true}, {"vendor", "vendor/a.php", true}, {"dist", "src/main.js", false}}
	for _, c := range cases {
		if got := wildcardMatch(c.p, c.s); got != c.want {
			t.Errorf("%s %s = %v", c.p, c.s, got)
		}
	}
}

func TestNestedGitignoreDoesNotExcludeSiblingSource(t *testing.T) {
	root := t.TempDir()
	dependency := filepath.Join(root, "vendor", "package")
	if err := os.MkdirAll(dependency, 0755); err != nil {
		t.Fatal(err)
	}
	// 依赖包中的局部规则只应作用于 vendor/package，不能过滤项目根目录。
	if err := os.WriteFile(filepath.Join(dependency, ".gitignore"), []byte("*\n"), 0644); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dependency, "ignored.go"), []byte("package ignored\n"), 0644); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(root, "main.go"), []byte("package main\nfunc main() {}\n"), 0644); err != nil {
		t.Fatal(err)
	}

	langs, files, err := (Scanner{}).Analyze(context.Background(), root, nil, func(int, string) {})
	if err != nil {
		t.Fatal(err)
	}
	if len(langs) != 1 || langs[0].Name != "Go" || langs[0].Files != 1 {
		t.Fatalf("嵌套 .gitignore 错误影响了同级源码: %#v", langs)
	}
	for _, file := range files {
		if file.Name == "ignored.go" {
			t.Fatal("嵌套 .gitignore 未排除自身目录中的文件")
		}
	}
}