package memory

import "testing"

// TestSourceConversation_Roundtrip 证明溯源编码是机器可回溯的：
// Format 后 Parse 得回同一对真实 id（裁决 04.4.3，design/03 §2）。
func TestSourceConversation_Roundtrip(t *testing.T) {
	t.Parallel()
	raw := FormatSourceConversation("web:abc", "turn-1")

	ref, ok := ParseSourceConversation(raw)
	if !ok {
		t.Fatalf("ParseSourceConversation(%q) ok = false, want structured", raw)
	}
	if ref.SessionID != "web:abc" || ref.MessageID != "turn-1" {
		t.Fatalf("parsed ref = %+v, want session web:abc / message turn-1", ref)
	}
}

// TestSourceConversation_BothBlank 证明两个 id 都缺时不落伪溯源
// （空串而不是空 JSON 对象）。
func TestSourceConversation_BothBlank(t *testing.T) {
	t.Parallel()
	if got := FormatSourceConversation("", "  "); got != "" {
		t.Fatalf("FormatSourceConversation(blank) = %q, want empty", got)
	}
	if _, ok := ParseSourceConversation(""); ok {
		t.Fatal("ParseSourceConversation(\"\") ok = true, want false")
	}
}

// TestSourceConversation_SessionOnly 证明只知会话粒度时溯源降级为
// 仅 session_id（渠道路径未挂 turn id 时的真实形态）。
func TestSourceConversation_SessionOnly(t *testing.T) {
	t.Parallel()
	raw := FormatSourceConversation("qq-obv11:group:123", "")
	ref, ok := ParseSourceConversation(raw)
	if !ok {
		t.Fatalf("ParseSourceConversation(%q) ok = false, want structured", raw)
	}
	if ref.SessionID != "qq-obv11:group:123" || ref.MessageID != "" {
		t.Fatalf("parsed ref = %+v, want session-only provenance", ref)
	}
}

// TestSourceConversation_LegacyFreeTextNotStructured 证明裁决前的
// LLM 自由文本来源解不回结构化形状 —— 调用方靠 ok=false 区分
// 遗留行与真实溯源，而不是把自由文本误当 id。
func TestSourceConversation_LegacyFreeTextNotStructured(t *testing.T) {
	t.Parallel()
	for _, legacy := range []string{"conv.1", "昨天聊咖啡时提到的", `["session"]`, `{"other":1}`} {
		if _, ok := ParseSourceConversation(legacy); ok {
			t.Fatalf("ParseSourceConversation(%q) ok = true, want false for legacy free text", legacy)
		}
	}
}