package handlers

import (
	"testing"

	"github.com/jackc/pgx/v5/pgtype"
	"github.com/stretchr/testify/assert"
)

func TestNewSeriesHandler_NilDB(t *testing.T) {
	handler := NewSeriesHandler(nil)
	assert.NotNil(t, handler, "Handler should not be nil even with nil DB")
	assert.NotNil(t, handler.seriesService, "Internal service should be initialized")
}

func TestSeriesHandler_TextToStringConversion(t *testing.T) {
	tests := []struct {
		name     string
		input    pgtype.Text
		expected string
	}{
		{
			name:     "valid author text",
			input:    pgtype.Text{String: "Brandon Sanderson", Valid: true},
			expected: "Brandon Sanderson",
		},
		{
			name:     "empty valid text",
			input:    pgtype.Text{String: "", Valid: true},
			expected: "",
		},
		{
			name:     "null text returns empty",
			input:    pgtype.Text{String: "ignored", Valid: false},
			expected: "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			result := textToString(tt.input)
			assert.Equal(t, tt.expected, result)
		})
	}
}