package main

import (
	"errors"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestBuildRemote(t *testing.T) {
	env, err := buildRemote(remoteSpec{Type: "s3", Params: map[string]string{"provider": "Minio", "endpoint": "http://127.0.0.1:9198", "bucket": "kb", "prefix": "/docs/2024/"}, Secrets: map[string]string{"accessKeyId": "ak", "secretAccessKey": "sk"}}, "")
	if err != nil {
		t.Fatal(err)
	}
	if env.path != "kb:kb/docs/2024" {
		t.Errorf("远程路径：%s", env.path)
	}
	joined := strings.Join(env.env, "\n")
	for _, want := range []string{"RCLONE_CONFIG_KB_TYPE=s3", "RCLONE_CONFIG_KB_PROVIDER=Minio", "RCLONE_CONFIG_KB_ENDPOINT=http://127.0.0.1:9198", "RCLONE_CONFIG_KB_SECRET_ACCESS_KEY=sk", "RCLONE_CONFIG_KB_ENV_AUTH=false"} {
		if !strings.Contains(joined, want) {
			t.Errorf("缺少 %s", want)
		}
	}
	bad := []remoteSpec{
		{Type: "s3", Params: map[string]string{"endpoint": "http://x", "bucket": "kb"}, Secrets: map[string]string{"accessKeyId": "ak"}},
		{Type: "s3", Params: map[string]string{"endpoint": "ftp://x", "bucket": "kb"}, Secrets: map[string]string{"accessKeyId": "a", "secretAccessKey": "b"}},
		{Type: "s3", Params: map[string]string{"endpoint": "http://x", "bucket": "-rf"}, Secrets: map[string]string{"accessKeyId": "a", "secretAccessKey": "b"}},
		{Type: "s3", Params: map[string]string{"endpoint": "http://x", "bucket": "kb", "prefix": "a/../../b"}, Secrets: map[string]string{"accessKeyId": "a", "secretAccessKey": "b"}},
		{Type: "s3", Params: map[string]string{"endpoint": "http://x\nRCLONE_X=1", "bucket": "kb"}, Secrets: map[string]string{"accessKeyId": "a", "secretAccessKey": "b"}},
		{Type: "webdav", Params: map[string]string{"url": "http://u:p@dav.local/"}},
		{Type: "webdav", Params: map[string]string{"url": "http://dav.local/", "vendor": "evil"}},
		{Type: "local", Params: map[string]string{"path": "/"}},
		{Type: "sftp"},
	}
	for i, r := range bad {
		if _, err := buildRemote(r, ""); err == nil {
			t.Errorf("第 %d 个配置应该被拒绝：%+v", i, r)
		}
	}
}

func TestClassify(t *testing.T) {
	cases := map[string]string{
		"ERROR : api error SignatureDoesNotMatch: The request signature we calculated does not match":                "auth_failed",
		"ERROR : https response error StatusCode: 403, api error AccessDenied: Access Denied.":                       "auth_failed",
		"ERROR : api error NoSuchBucket: The specified bucket does not exist":                                        "path_missing",
		`ERROR : request send failed, Get "http://127.0.0.1:1/x": dial tcp 127.0.0.1:1: connect: connection refused`: "unreachable",
		"ERROR : dial tcp: lookup nas.local: no such host":                                                           "unreachable",
	}
	for in, want := range cases {
		if st, msg := classify(in); st != want || msg == "" {
			t.Errorf("%q → %s %q，应为 %s", in, st, msg, want)
		}
	}
	if _, msg := classify("2026/11/06 ERROR : api error AccessDenied: Access Denied."); msg != "认证失败或没有权限：AccessDenied：Access Denied." {
		t.Errorf("错误信息：%q", msg)
	}
	long := `ERROR : error listing: operation error S3: ListObjectsV2, exceeded maximum number of attempts, 1, request send failed, Get "http://127.0.0.1:1/kb?x=1": dial tcp 127.0.0.1:1: connect: connection refused`
	if _, msg := classify(long); msg != "无法连接：dial tcp 127.0.0.1:1: connect: connection refused" {
		t.Errorf("网络错误信息：%q", msg)
	}
}

// 需要 rclone：RCLONE_BIN 或 PATH 中的 rclone；用 rclone 的 local 后端，不需要网络
func rcloneBin(t *testing.T) string {
	if b := os.Getenv("RCLONE_BIN"); b != "" {
		return b
	}
	if b, err := exec.LookPath("rclone"); err == nil {
		return b
	}
	t.Skip("没有 rclone（设置 RCLONE_BIN）")
	return ""
}

func TestRemoteMount(t *testing.T) {
	needFuse(t)
	bin := rcloneBin(t)
	allowLocalRemote = true
	defer func() { allowLocalRemote = false }()
	base, roots := tempRoots(t)
	data := filepath.Join(base, "remote-data")
	os.MkdirAll(filepath.Join(data, "产品手册", ".git"), 0o755)
	os.WriteFile(filepath.Join(data, "产品手册", "规格.csv"), []byte("型号,功率\nA100,5\n"), 0o644)
	os.WriteFile(filepath.Join(data, ".env"), []byte("SECRET=1"), 0o644)
	dir := filepath.Join(base, "mounter")
	mntDir := filepath.Join(base, "kbmnt")
	for _, d := range []string{dir, mntDir, filepath.Join(dir, "remote"), filepath.Join(dir, "cache")} {
		os.MkdirAll(d, 0o755)
	}
	conf := filepath.Join(dir, "rclone.conf")
	os.WriteFile(conf, nil, 0o600)
	m := newManager(realSystem{}, roots, mntDir, filepath.Join(dir, "state.json")).withRemote(&rcloneRunner{bin: bin, config: conf, home: dir}, filepath.Join(dir, "remote"), filepath.Join(dir, "cache"))
	defer m.unmountAll()

	spec := mountSpec{ID: "kb_r1", Kind: "remote", Remote: &remoteSpec{Type: "local", Params: map[string]string{"path": data}}}
	st, err := m.sync([]mountSpec{spec}, true)
	if err != nil || len(st) != 1 || st[0].State != "ok" {
		t.Fatalf("远程存储挂载：%+v %v", st, err)
	}
	mp := filepath.Join(mntDir, "kb_r1")
	if got := names(t, mp); len(got) != 1 || got[0] != "产品手册" {
		t.Errorf("目录列表（隐藏文件不可见）：%v", got)
	}
	if b, err := os.ReadFile(filepath.Join(mp, "产品手册", "规格.csv")); err != nil || !strings.Contains(string(b), "A100") {
		t.Errorf("读取：%q %v", b, err)
	}
	if _, err := os.Stat(filepath.Join(mp, ".env")); !errors.Is(err, os.ErrNotExist) {
		t.Errorf(".env 应该不存在：%v", err)
	}
	if err := os.WriteFile(filepath.Join(mp, "x.txt"), []byte("x"), 0o644); err == nil {
		t.Error("应该不能写入")
	}
	// 凭据不出现在命令行
	m.mu.Lock()
	cmd := m.mounts["kb_r1"].remote.cmd
	m.mu.Unlock()
	if strings.Contains(strings.Join(cmd.Args, " "), "RCLONE_CONFIG") {
		t.Errorf("命令行中不应有配置：%v", cmd.Args)
	}

	// 配置错误：状态为挂载失败
	bad := mountSpec{ID: "kb_r2", Kind: "remote", Remote: &remoteSpec{Type: "s3", Params: map[string]string{"bucket": "x"}}}
	st, _ = m.sync([]mountSpec{spec, bad}, false)
	if st[1].State != "mount_failed" {
		t.Errorf("配置错误：%+v", st[1])
	}

	// 删除：停止 rclone、卸载、清理缓存
	if _, err := m.sync(nil, false); err != nil {
		t.Fatal(err)
	}
	time.Sleep(200 * time.Millisecond)
	for _, p := range []string{mp, filepath.Join(dir, "remote", "kb_r1"), filepath.Join(dir, "cache", "kb_r1")} {
		if _, err := os.Stat(p); !errors.Is(err, os.ErrNotExist) {
			t.Errorf("%s 应该已删除：%v", p, err)
		}
	}
	if cmd.ProcessState == nil {
		t.Error("rclone 应该已退出")
	}
}