package bot

import (
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestNew_EmptyToken(t *testing.T) {
	_, err := New(Config{Token: ""})
	require.Error(t, err, "New with empty token should return an error")
}

func TestIsAllowed_EmptyList(t *testing.T) {
	b := &Bot{
		cfg: Config{AllowedChats: nil},
	}
	assert.True(t, b.isAllowed(12345), "empty AllowedChats should allow any chat ID")
	assert.True(t, b.isAllowed(0), "empty AllowedChats should allow zero chat ID")
	assert.True(t, b.isAllowed(-999), "empty AllowedChats should allow negative chat ID")
}

func TestIsAllowed_RestrictedList(t *testing.T) {
	b := &Bot{
		cfg: Config{AllowedChats: []int64{100, 200}},
	}
	assert.True(t, b.isAllowed(100), "chat 100 should be allowed")
	assert.True(t, b.isAllowed(200), "chat 200 should be allowed")
	assert.False(t, b.isAllowed(999), "chat 999 should not be allowed")
	assert.False(t, b.isAllowed(0), "chat 0 should not be allowed")
}

func TestCheckRateLimit(t *testing.T) {
	b := &Bot{
		rateLimits: make(map[int64]time.Time),
	}

	cooldown := 60 * time.Second

	// First call should be allowed.
	assert.True(t, b.checkRateLimit(1, cooldown), "first call should pass rate limit")

	// Immediate second call should be blocked.
	assert.False(t, b.checkRateLimit(1, cooldown), "immediate second call should be rate limited")

	// Different user should not be affected.
	assert.True(t, b.checkRateLimit(2, cooldown), "different user should pass rate limit")

	// After cooldown expires, the same user should be allowed again.
	b.rateMu.Lock()
	b.rateLimits[1] = time.Now().Add(-61 * time.Second)
	b.rateMu.Unlock()
	assert.True(t, b.checkRateLimit(1, cooldown), "should pass after cooldown expires")
}