package trace

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

// TestRedactTextScrubsCredentials asserts every credential shape the dashboard
// could be handed is replaced, while ordinary text passes through unchanged.
func TestRedactTextScrubsCredentials(t *testing.T) {
	t.Parallel()
	secrets := []string{
		"api_key=sk-abcdef0123456789",
		`{"token":"abcdef1234567890"}`,
		"password=hunter2hunter2",
		"Authorization: Bearer eyJhbGciOiJIUzI1NiJ9.abc.def",
		"eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.SflKxwRJSMeKKF2QT4",
		"access_token: ghp_0123456789abcdefghij",
	}
	for _, in := range secrets {
		got := RedactText(in)
		if !strings.Contains(got, redactedMarker) {
			t.Fatalf("RedactText(%q) = %q, want the redaction marker", in, got)
		}
		for _, leak := range []string{"sk-abcdef0123456789", "hunter2hunter2", "abcdef1234567890",
			"eyJhbGciOiJIUzI1NiJ9", "ghp_0123456789abcdefghij"} {
			if strings.Contains(got, leak) {
				t.Fatalf("RedactText(%q) = %q, still carries %q", in, got, leak)
			}
		}
	}

	benign := "the tool returned 3 rows; stop_reason=tool_calls"
	if got := RedactText(benign); got != benign {
		t.Fatalf("RedactText(%q) = %q, want it unchanged", benign, got)
	}
	if got := truncate("", maxSummaryRunes); got != "" {
		t.Fatalf("empty text = %q, want empty", got)
	}
	long := strings.Repeat("x", maxSummaryRunes+10)
	if got := RedactText(long); !strings.HasSuffix(got, "…") || len([]rune(got)) != maxSummaryRunes+1 {
		t.Fatalf("long text was not truncated to the summary bound: %d runes", len([]rune(got)))
	}
}

// TestRedactEventScrubsNestedValues asserts a secret nested in a map or a slice is
// scrubbed too — the shapes a tool result or error payload actually has.
func TestRedactEventScrubsNestedValues(t *testing.T) {
	t.Parallel()
	ev := Event{Type: "tool.done", Props: map[string]any{
		"tool": "http",
		"headers": map[string]any{
			"Authorization": "Bearer sk-live-0123456789abcdef",
		},
		"args_keys": []string{"api_key", "url"},
		"nested":    []any{map[string]any{"password": "hunter2hunter2"}},
		"count":     2,
	}}

	got := RedactEvent(ev)
	if got.Type != ev.Type || got.Time != ev.Time {
		t.Fatalf("event envelope changed: %+v", got)
	}
	blob, err := json.Marshal(got)
	if err != nil {
		t.Fatalf("marshal: %v", err)
	}
	for _, leak := range []string{"sk-live-0123456789abcdef", "hunter2hunter2"} {
		if strings.Contains(string(blob), leak) {
			t.Fatalf("redacted event still carries %q: %s", leak, blob)
		}
	}
	if count, ok := got.Props["count"].(int); !ok || count != 2 {
		t.Fatalf("non-string prop = %v, want it passed through", got.Props["count"])
	}
	// The original event must not be mutated (a caller may still need it).
	if orig, _ := ev.Props["headers"].(map[string]any)["Authorization"].(string); !strings.Contains(orig, "sk-live-") {
		t.Fatalf("RedactEvent mutated the caller's event: %v", orig)
	}
}

// TestNodePropsAndLogAreRedacted asserts the published graph — both a tool node's
// result_summary prop and its log events — never carries a credential. This is the
// design/19 §3 red line at the last point before publication.
//
// M40 之后 result_summary 是**生产侧**写入的已脱敏摘要（loop/recordToolResult），
// 读侧只做白名单投影，不再从结果原文反推。因此这里同时钉住两件事：白名单键
// 的值仍被逐层清洗；而任何「结果原文」形态的 prop（表外的 result）根本不出图，
// 哪怕某个生产者又把它塞了回来。
func TestNodePropsAndLogAreRedacted(t *testing.T) {
	t.Parallel()
	rec := spanRec("t1", "step1", "tool.http", SpanKindTool, SpanStatusOK,
		map[string]any{
			"result_summary": `{"api_key":"sk-abcdef0123456789"}`,
			"result":         map[string]any{"body": `{"api_key":"sk-abcdef0123456789"}`},
		})
	rec.Events = []Event{{
		Type: "tool.done",
		Props: map[string]any{
			"tool":           "http",
			"args_keys":      []string{"api_key"},
			"result_summary": `{"api_key":"sk-abcdef0123456789"}`,
		},
	}}

	g := graphFor([]SpanRecord{rec}, "token=abcdef1234567890", "reply")
	node := nodeByID(g, "t1")
	if len(node.Log) != 1 || node.Log[0].Type != "tool.done" {
		t.Fatalf("node log = %+v, want the recorded event", node.Log)
	}
	blob, err := json.Marshal(g)
	if err != nil {
		t.Fatalf("marshal graph: %v", err)
	}
	if strings.Contains(string(blob), "sk-abcdef0123456789") {
		t.Fatalf("published graph leaked the tool result: %s", blob)
	}
	if !strings.Contains(string(blob), redactedMarker) {
		t.Fatalf("published graph carries no redaction marker: %s", blob)
	}
	if got, ok := node.Props["result_summary"].(string); !ok || !strings.Contains(got, redactedMarker) {
		t.Fatalf("result_summary prop = %v, want it scrubbed", node.Props["result_summary"])
	}
	if _, ok := node.Props["result"]; ok {
		t.Fatalf("表外 prop result 出图了：%+v（读侧只投影白名单）", node.Props)
	}
	// The round's own input/output labels are scrubbed as well.
	if in := nodeByID(g, "input").Label; strings.Contains(in, "abcdef1234567890") {
		t.Fatalf("input label leaked a credential: %q", in)
	}
}

// TestRedactEventKeepsEmptyPropsNil guards the wire shape: an event without props
// must not gain an empty map.
func TestRedactEventKeepsEmptyPropsNil(t *testing.T) {
	t.Parallel()
	ev := Event{Type: "llm.done", Time: time.Now()}
	if got := RedactEvent(ev); got.Props != nil {
		t.Fatalf("props = %v, want nil", got.Props)
	}
}