package promptcompat

import "testing"

func TestAppendThinkingInjectionToLatestUserStringContent(t *testing.T) {
	messages := []any{
		map[string]any{"role": "user", "content": "older"},
		map[string]any{"role": "assistant", "content": "ok"},
		map[string]any{"role": "user", "content": "latest"},
	}

	out, changed := AppendThinkingInjectionToLatestUser(messages)
	if changed {
		t.Fatal("expected thinking injection to be disabled")
	}
	if len(out) != len(messages) {
		t.Fatalf("expected messages unchanged, got %#v", out)
	}
}

func TestAppendThinkingInjectionToLatestUserArrayContent(t *testing.T) {
	messages := []any{
		map[string]any{
			"role": "user",
			"content": []any{
				map[string]any{"type": "text", "text": "latest"},
			},
		},
	}

	out, changed := AppendThinkingInjectionToLatestUser(messages)
	if changed {
		t.Fatal("expected thinking injection to be disabled")
	}
	if len(out) != len(messages) {
		t.Fatalf("expected messages unchanged, got %#v", out)
	}
}

func TestAppendThinkingInjectionToLatestUserCustomPrompt(t *testing.T) {
	messages := []any{
		map[string]any{"role": "user", "content": "latest"},
	}

	out, changed := AppendThinkingInjectionPromptToLatestUser(messages, "custom thinking format")
	if changed {
		t.Fatal("expected custom thinking injection to be disabled")
	}
	if len(out) != len(messages) {
		t.Fatalf("expected messages unchanged, got %#v", out)
	}
}

func TestAppendThinkingInjectionToLatestUserSkipsDuplicate(t *testing.T) {
	messages := []any{
		map[string]any{"role": "user", "content": "latest\n\n" + DefaultThinkingInjectionPrompt},
	}

	out, changed := AppendThinkingInjectionToLatestUser(messages)
	if changed {
		t.Fatal("expected thinking injection to be disabled")
	}
	if len(out) != 1 {
		t.Fatalf("unexpected messages: %#v", out)
	}
}