package render

import (
	"encoding/json"
	"strings"
	"testing"
)

func TestAlertCardIsInteractiveWithRedHeader(t *testing.T) {
	body, err := AlertCard(Alert{
		Environment: "preview",
		Title:       "归档目录不可用",
		Summary:     "正在重启以重新挂载",
		Reason:      "宿主机上的归档目录已被删除，容器仍指向旧目录（挂载失效）。",
		Path:        "/data/full-sync",
	})
	if err != nil {
		t.Fatal(err)
	}
	var decoded map[string]any
	if err := json.Unmarshal(body, &decoded); err != nil {
		t.Fatalf("alert card must be valid JSON: %v", err)
	}
	if decoded["msg_type"] != "interactive" {
		t.Fatalf("alert must be an interactive card, got %v", decoded["msg_type"])
	}
	card := decoded["card"].(map[string]any)
	header := card["header"].(map[string]any)
	if header["template"] != "red" {
		t.Fatalf("alert header should be red so it stands out, got %v", header["template"])
	}
	title := header["title"].(map[string]any)["content"].(string)
	if !strings.Contains(title, "预演") || !strings.Contains(title, "归档目录不可用") {
		t.Fatalf("unexpected title: %q", title)
	}
}

func TestAlertCardShowsPathAndRepeatCount(t *testing.T) {
	body, err := AlertCard(Alert{
		Environment: "dev",
		Title:       "归档目录不可用",
		Summary:     "正在重启以重新挂载",
		Reason:      "目录不存在。",
		Path:        "/data/full-sync",
		ExitCount:   3,
	})
	if err != nil {
		t.Fatal(err)
	}
	text := string(body)
	if !strings.Contains(text, "/data/full-sync") {
		t.Fatal("card should show the path")
	}
	if !strings.Contains(text, "已重复 3 次") {
		t.Fatal("card should warn about repeated exits")
	}
}

// 单次故障时不该出现「已重复」这种话，避免误导。
func TestAlertCardOmitsRepeatNoticeOnFirstOccurrence(t *testing.T) {
	body, err := AlertCard(Alert{Environment: "dev", Title: "归档目录不可用", ExitCount: 1})
	if err != nil {
		t.Fatal(err)
	}
	if strings.Contains(string(body), "已重复") {
		t.Fatal("first occurrence must not claim repeats")
	}
}

func TestFriendlyReasonTranslatesKnownErrors(t *testing.T) {
	cases := map[string]string{
		"archive directory was deleted on the host (nlink=0); recreate this container": "宿主机上的归档目录已被删除",
		"stat /data/x: no such file or directory":                                      "目录不存在。",
		"open /data/x: permission denied":                                              "没有读取权限。",
	}
	for input, want := range cases {
		if got := FriendlyReason(input); !strings.Contains(got, want) {
			t.Fatalf("FriendlyReason(%q) = %q, want it to contain %q", input, got, want)
		}
	}
	// 未知错误原样保留，便于排查
	unknown := "some unexpected failure"
	if got := FriendlyReason(unknown); got != unknown {
		t.Fatalf("unknown reason must be preserved, got %q", got)
	}
}