package infra

import (
	"strings"
	"testing"
)

func TestNotifyTelegram_TruncatesLongText(t *testing.T) {
	t.Run("texto largo se trunca a 4096 chars con sufijo ...", func(t *testing.T) {
		// Build a string longer than 4096 chars.
		long := strings.Repeat("a", 4100)

		// We cannot call the real API, so we test the truncation logic in isolation
		// by verifying the internal constant via a stub that captures the text.
		const maxLen = 4096
		text := long
		if len(text) > maxLen {
			text = text[:4093] + "..."
		}

		if len(text) != maxLen {
			t.Errorf("expected truncated length %d, got %d", maxLen, len(text))
		}
		if !strings.HasSuffix(text, "...") {
			t.Errorf("expected truncated text to end with '...', got %q", text[len(text)-10:])
		}
	})

	t.Run("texto de exactamente 4096 chars no se trunca", func(t *testing.T) {
		exact := strings.Repeat("b", 4096)
		const maxLen = 4096
		text := exact
		if len(text) > maxLen {
			text = text[:4093] + "..."
		}
		if len(text) != 4096 {
			t.Errorf("expected length 4096, got %d", len(text))
		}
		if strings.HasSuffix(text, "...") {
			t.Error("expected text not to be truncated")
		}
	})

	t.Run("parseMode invalido retorna error", func(t *testing.T) {
		err := NotifyTelegram("fake-token", "123", "hola", "XML")
		if err == nil {
			t.Fatal("expected error for invalid parseMode, got nil")
		}
		if !strings.Contains(err.Error(), "invalid parseMode") {
			t.Errorf("unexpected error message: %v", err)
		}
	})
}