package utils_test

import (
	"testing"
	"tinyauth/internal/utils"

	"gotest.tools/v3/assert"
)

func TestCapitalize(t *testing.T) {
	// Test empty string
	assert.Equal(t, "", utils.Capitalize(""))

	// Test single character
	assert.Equal(t, "A", utils.Capitalize("a"))

	// Test multiple characters
	assert.Equal(t, "Hello", utils.Capitalize("hello"))

	// Test already capitalized
	assert.Equal(t, "World", utils.Capitalize("World"))

	// Test non-alphabetic first character
	assert.Equal(t, "1number", utils.Capitalize("1number"))

	// Test Unicode characters
	assert.Equal(t, "Γειά", utils.Capitalize("γειά"))
	assert.Equal(t, "Привет", utils.Capitalize("привет"))

}

func TestCoalesceToString(t *testing.T) {
	// Test with []any containing strings
	assert.Equal(t, "a,b,c", utils.CoalesceToString([]any{"a", "b", "c"}))

	// Test with []any containing mixed types
	assert.Equal(t, "a,c", utils.CoalesceToString([]any{"a", 1, "c", true}))

	// Test with []any containing no strings
	assert.Equal(t, "", utils.CoalesceToString([]any{1, 2, 3}))

	// Test with string input
	assert.Equal(t, "hello", utils.CoalesceToString("hello"))

	// Test with non-string, non-[]any input
	assert.Equal(t, "", utils.CoalesceToString(123))

	// Test with nil input
	assert.Equal(t, "", utils.CoalesceToString(nil))
}