// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later

package datetime

import (
	"testing"
	"time"
)

func TestFormatsAndExamples(t *testing.T) {
	now := time.Date(2026, 10, 25, 14, 5, 9, 0, time.FixedZone("fixture", -4*3600))
	for _, testCase := range []struct {
		id, want string
		date     bool
	}{
		{"24-hour", "14:05", false},
		{"24-hour-seconds", "14:05:09", false},
		{"24-hour-words", "14 hours and 05 minutes", false},
		{"24-hour-seconds-words", "14 hours, 05 minutes and 09 seconds", false},
		{"numbers-dm", "25/10", true},
		{"numbers-md", "10/25", true},
		{"numbers-dmy", "25/10/2026", true},
		{"numbers-mdy", "10/25/2026", true},
		{"numbers-ymd", "2026/10/25", true},
	} {
		format := Format_time
		if testCase.date {
			format = Format_date
		}
		if got, ok := format(testCase.id, now); !ok || got != testCase.want {
			t.Fatal(testCase.id, got, ok)
		}
	}
	for _, date := range []bool{false, true} {
		options, format, valid := Time_options(now), Format_time, Valid_time
		if date {
			options, format, valid = Date_options(now), Format_date, Valid_date
		}
		for _, option := range options {
			got, ok := format(option.Value, now)
			if !ok || !valid(option.Value) || got == "" || got != option.Label {
				t.Fatal(option, got, ok)
			}
		}
		if got, ok := format("%arbitrary", now); ok || got != "" || valid("%arbitrary") {
			t.Fatal("invalid preset accepted")
		}
	}
	if got, _ := Format_time("24-hour-seconds", now.Add(10*time.Hour)); got != "00:05:09" {
		t.Fatal(got)
	}
}