package config

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

func backendRoot(t *testing.T) string {
	t.Helper()
	wd, err := os.Getwd()
	if err != nil {
		t.Fatal(err)
	}
	root, err := filepath.Abs(filepath.Join(wd, ".."))
	if err != nil {
		t.Fatal(err)
	}
	return root
}

func assertPath(t *testing.T, got, want string) {
	t.Helper()
	g, err := filepath.Abs(got)
	if err != nil {
		t.Fatal(err)
	}
	w, err := filepath.Abs(want)
	if err != nil {
		t.Fatal(err)
	}
	if filepath.Clean(g) != filepath.Clean(w) {
		t.Fatalf("路径不符:\n  got  %s\n  want %s", g, w)
	}
}

func TestResolveWorkPathFromOfficialCwd(t *testing.T) {
	root := backendRoot(t)
	t.Chdir(root)
	got, err := resolveWorkPath()
	if err != nil {
		t.Fatal(err)
	}
	assertPath(t, got, root)
}

func TestResolveWorkPathFromCmdJiang13(t *testing.T) {
	root := backendRoot(t)
	t.Chdir(filepath.Join(root, "cmd", "jiang13"))
	got, err := resolveWorkPath()
	if err != nil {
		t.Fatal(err)
	}
	assertPath(t, got, root)
}

func TestResolveWorkPathFromRepoRoot(t *testing.T) {
	root := backendRoot(t)
	t.Chdir(filepath.Join(root, ".."))
	got, err := resolveWorkPath()
	if err != nil {
		t.Fatal(err)
	}
	assertPath(t, got, root)
}

func TestResolveWorkPathEnvOverride(t *testing.T) {
	root := backendRoot(t)
	t.Setenv("JIANG13_WORK_PATH", root)
	t.Chdir(t.TempDir())
	got, err := resolveWorkPath()
	if err != nil {
		t.Fatal(err)
	}
	assertPath(t, got, root)
}

func TestRejectStrayDataDir(t *testing.T) {
	err := rejectStrayDataDir(`C:\proj\backend\cmd\jiang13\data`)
	if err == nil {
		t.Fatal("期望拒绝 cmd/jiang13/data")
	}
	if !strings.Contains(err.Error(), "拒绝使用数据目录") {
		t.Fatalf("错误文案不符: %v", err)
	}
	if err := rejectStrayDataDir(`C:\proj\backend\data`); err != nil {
		t.Fatal(err)
	}
}