// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.

package page

import (
	"testing"

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

type testOrderField string

func (f testOrderField) Column() string { return string(f) }
func (f testOrderField) String() string { return string(f) }

func TestNewCursor(t *testing.T) {
	t.Parallel()

	orderBy := OrderBy[testOrderField]{
		Field:     testOrderField("created_at"),
		Direction: OrderDirectionAsc,
	}

	tests := []struct {
		name         string
		size         int
		expectedSize int
	}{
		{
			name:         "negative size defaults to DefaultCursorSize",
			size:         -10,
			expectedSize: DefaultCursorSize,
		},
		{
			name:         "zero size defaults to DefaultCursorSize",
			size:         0,
			expectedSize: DefaultCursorSize,
		},
		{
			name:         "valid size is kept as-is",
			size:         50,
			expectedSize: 50,
		},
		{
			name:         "oversized value is clamped to MaxCursorSize",
			size:         500,
			expectedSize: MaxCursorSize,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			cursor := NewCursor[testOrderField](tt.size, nil, Head, orderBy)
			assert.Equal(t, tt.expectedSize, cursor.Size)
		})
	}
}