package testutil

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

	"skillmgr/pkg/fileutil"
)

// SetupTestEnv 设置测试环境
// 返回临时目录路径和清理函数
func SetupTestEnv(t *testing.T) (string, func()) {
	t.Helper()

	tmpDir, err := os.MkdirTemp("", "skillmgr-test-*")
	if err != nil {
		t.Fatalf("创建临时目录失败: %v", err)
	}

	// 设置环境变量
	os.Setenv("SKILLMGR_TEST_ROOT", tmpDir)
	os.Setenv("SKILLMGR_TEST_BASE", tmpDir)

	cleanup := func() {
		os.Unsetenv("SKILLMGR_TEST_ROOT")
		os.Unsetenv("SKILLMGR_TEST_BASE")
		os.RemoveAll(tmpDir)
	}

	return tmpDir, cleanup
}

// SetupTestRepo 创建一个临时 git 仓库
// 返回仓库路径
func SetupTestRepo(t *testing.T, baseDir string) string {
	t.Helper()

	repoDir := filepath.Join(baseDir, "test-repo")
	if err := os.MkdirAll(repoDir, 0755); err != nil {
		t.Fatalf("创建仓库目录失败: %v", err)
	}

	// 初始化 git 仓库
	cmd := exec.Command("git", "init")
	cmd.Dir = repoDir
	if output, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("git init 失败: %v\n%s", err, output)
	}

	// 配置 git user（测试用）
	configCmds := [][]string{
		{"git", "config", "user.email", "test@example.com"},
		{"git", "config", "user.name", "Test User"},
	}
	for _, args := range configCmds {
		cmd := exec.Command(args[0], args[1:]...)
		cmd.Dir = repoDir
		if output, err := cmd.CombinedOutput(); err != nil {
			t.Fatalf("git config 失败: %v\n%s", err, output)
		}
	}

	return repoDir
}

// CopyFixtureRepo 复制 fixture 仓库并初始化 git
func CopyFixtureRepo(t *testing.T, fixtureDir, destDir string) string {
	t.Helper()

	repoDir := filepath.Join(destDir, filepath.Base(fixtureDir))
	if err := fileutil.CopyDir(fixtureDir, repoDir); err != nil {
		t.Fatalf("复制 fixture 仓库失败: %v", err)
	}

	// 初始化 git 仓库
	cmd := exec.Command("git", "init")
	cmd.Dir = repoDir
	if output, err := cmd.CombinedOutput(); err != nil {
		t.Fatalf("git init 失败: %v\n%s", err, output)
	}

	// 配置 git user（测试用）
	configCmds := [][]string{
		{"git", "config", "user.email", "test@example.com"},
		{"git", "config", "user.name", "Test User"},
	}
	for _, args := range configCmds {
		cmd := exec.Command(args[0], args[1:]...)
		cmd.Dir = repoDir
		if output, err := cmd.CombinedOutput(); err != nil {
			t.Fatalf("git config 失败: %v\n%s", err, output)
		}
	}

	// 添加并提交
	addCmd := exec.Command("git", "add", ".")
	addCmd.Dir = repoDir
	if output, err := addCmd.CombinedOutput(); err != nil {
		t.Fatalf("git add 失败: %v\n%s", err, output)
	}

	commitCmd := exec.Command("git", "commit", "-m", "Initial commit")
	commitCmd.Dir = repoDir
	if output, err := commitCmd.CombinedOutput(); err != nil {
		t.Fatalf("git commit 失败: %v\n%s", err, output)
	}

	return repoDir
}

// GetFixturePath 获取 fixture 目录路径
func GetFixturePath(t *testing.T) string {
	t.Helper()

	// 尝试几个可能的位置
	candidates := []string{
		"testdata/fixtures",
		"../testdata/fixtures",
		"../../testdata/fixtures",
		"../../../testdata/fixtures",
	}

	for _, candidate := range candidates {
		if _, err := os.Stat(candidate); err == nil {
			abs, _ := filepath.Abs(candidate)
			return abs
		}
	}

	// 从工作目录向上查找
	wd, _ := os.Getwd()
	for {
		candidate := filepath.Join(wd, "testdata", "fixtures")
		if _, err := os.Stat(candidate); err == nil {
			return candidate
		}
		parent := filepath.Dir(wd)
		if parent == wd {
			break
		}
		wd = parent
	}

	t.Fatalf("无法找到 fixtures 目录")
	return ""
}

// CreateTestSkill 在目录中创建测试 skill
func CreateTestSkill(t *testing.T, baseDir, name string) string {
	t.Helper()

	skillDir := filepath.Join(baseDir, "skills", name)
	if err := os.MkdirAll(skillDir, 0755); err != nil {
		t.Fatalf("创建 skill 目录失败: %v", err)
	}

	content := []byte("# " + name + "\n\nTest skill.\n")
	if err := os.WriteFile(filepath.Join(skillDir, "SKILL.md"), content, 0644); err != nil {
		t.Fatalf("创建 SKILL.md 失败: %v", err)
	}

	return skillDir
}

// CreateTestCommand 在目录中创建测试命令组
func CreateTestCommand(t *testing.T, baseDir, groupName string, files []string) string {
	t.Helper()

	cmdDir := filepath.Join(baseDir, "commands", groupName)
	if err := os.MkdirAll(cmdDir, 0755); err != nil {
		t.Fatalf("创建 command 目录失败: %v", err)
	}

	for _, file := range files {
		content := []byte("# " + file + "\n\nTest command.\n")
		if err := os.WriteFile(filepath.Join(cmdDir, file), content, 0644); err != nil {
			t.Fatalf("创建 %s 失败: %v", file, err)
		}
	}

	return cmdDir
}