package exec

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

// TestProcessEventLegacyOmitempty：零值新字段不出现在 JSON 中，旧消费方
// 忽略未知字段时看到的遗留载荷与仅填 Type/Tool/Text/Detail 一致。
func TestProcessEventLegacyOmitempty(t *testing.T) {
	legacy := ProcessEvent{Type: "tool_execution_end", Tool: "echo", Text: "ran", Detail: "{}"}
	withZeros := ProcessEvent{
		Type: "tool_execution_end", Tool: "echo", Text: "ran", Detail: "{}",
		CallID: "", Status: "", ErrorReason: "",
	}
	a, err := json.Marshal(legacy)
	if err != nil {
		t.Fatal(err)
	}
	b, err := json.Marshal(withZeros)
	if err != nil {
		t.Fatal(err)
	}
	if string(a) != string(b) {
		t.Fatalf("zero new fields changed JSON:\n  legacy=%s\n  zeros=%s", a, b)
	}
	if strings.Contains(string(a), "call_id") || strings.Contains(string(a), "status") ||
		strings.Contains(string(a), "error_reason") {
		t.Fatalf("omitempty leaked zero fields: %s", a)
	}

	populated := ProcessEvent{
		Type: "tool_execution_end", Tool: "echo", Text: "boom",
		CallID: "c1", Status: "error", ErrorReason: "boom",
	}
	raw, err := json.Marshal(populated)
	if err != nil {
		t.Fatal(err)
	}
	s := string(raw)
	for _, want := range []string{`"call_id":"c1"`, `"status":"error"`, `"error_reason":"boom"`} {
		if !strings.Contains(s, want) {
			t.Fatalf("missing %s in %s", want, s)
		}
	}
}