<?php

namespace App\Support\Formatting;

/**
 * The zones a company can be set to, as the time-zone picker wants them.
 *
 * Two facts are kept per zone and nothing else: its IANA identifier, and how
 * far standard time there runs from UTC. The label is composed from the pair,
 * the offset in brackets followed by the place, and the place is read straight
 * out of the identifier. Rows run west to east, ordered on the offset with the
 * place name settling ties.
 *
 * Standard time is used deliberately, so that an entry cannot re-label itself
 * twice a year, and the table is deliberately frozen: identifiers the database
 * has since renamed are still what older companies have saved against, and
 * re-basing a zone here would silently move every one of them.
 */
class TimeZones
{
    public static function get_list()
    {
        $zones = [
            'Pacific/Midway' => '-11:00',
            'Pacific/Niue' => '-11:00',
            'Pacific/Pago_Pago' => '-11:00',
            'America/Adak' => '-10:00',
            'Pacific/Honolulu' => '-10:00',
            'Pacific/Johnston' => '-10:00',
            'Pacific/Rarotonga' => '-10:00',
            'Pacific/Tahiti' => '-10:00',
            'Pacific/Marquesas' => '-09:30',
            'America/Anchorage' => '-09:00',
            'Pacific/Gambier' => '-09:00',
            'America/Juneau' => '-09:00',
            'America/Nome' => '-09:00',
            'America/Sitka' => '-09:00',
            'America/Yakutat' => '-09:00',
            'America/Dawson' => '-08:00',
            'America/Los_Angeles' => '-08:00',
            'America/Metlakatla' => '-08:00',
            'Pacific/Pitcairn' => '-08:00',
            'America/Santa_Isabel' => '-08:00',
            'America/Tijuana' => '-08:00',
            'America/Vancouver' => '-08:00',
            'America/Whitehorse' => '-08:00',
            'America/Boise' => '-07:00',
            'America/Cambridge_Bay' => '-07:00',
            'America/Chihuahua' => '-07:00',
            'America/Creston' => '-07:00',
            'America/Dawson_Creek' => '-07:00',
            'America/Denver' => '-07:00',
            'America/Edmonton' => '-07:00',
            'America/Hermosillo' => '-07:00',
            'America/Inuvik' => '-07:00',
            'America/Mazatlan' => '-07:00',
            'America/Ojinaga' => '-07:00',
            'America/Phoenix' => '-07:00',
            'America/Shiprock' => '-07:00',
            'America/Yellowknife' => '-07:00',
            'America/Bahia_Banderas' => '-06:00',
            'America/Belize' => '-06:00',
            'America/North_Dakota/Beulah' => '-06:00',
            'America/Cancun' => '-06:00',
            'America/North_Dakota/Center' => '-06:00',
            'America/Chicago' => '-06:00',
            'America/Costa_Rica' => '-06:00',
            'Pacific/Easter' => '-06:00',
            'America/El_Salvador' => '-06:00',
            'Pacific/Galapagos' => '-06:00',
            'America/Guatemala' => '-06:00',
            'America/Indiana/Knox' => '-06:00',
            'America/Managua' => '-06:00',
            'America/Matamoros' => '-06:00',
            'America/Menominee' => '-06:00',
            'America/Merida' => '-06:00',
            'America/Mexico_City' => '-06:00',
            'America/Monterrey' => '-06:00',
            'America/North_Dakota/New_Salem' => '-06:00',
            'America/Rainy_River' => '-06:00',
            'America/Rankin_Inlet' => '-06:00',
            'America/Regina' => '-06:00',
            'America/Resolute' => '-06:00',
            'America/Swift_Current' => '-06:00',
            'America/Tegucigalpa' => '-06:00',
            'America/Indiana/Tell_City' => '-06:00',
            'America/Winnipeg' => '-06:00',
            'America/Atikokan' => '-05:00',
            'America/Bogota' => '-05:00',
            'America/Cayman' => '-05:00',
            'America/Detroit' => '-05:00',
            'America/Grand_Turk' => '-05:00',
            'America/Guayaquil' => '-05:00',
            'America/Havana' => '-05:00',
            'America/Indiana/Indianapolis' => '-05:00',
            'America/Iqaluit' => '-05:00',
            'America/Jamaica' => '-05:00',
            'America/Lima' => '-05:00',
            'America/Kentucky/Louisville' => '-05:00',
            'America/Indiana/Marengo' => '-05:00',
            'America/Kentucky/Monticello' => '-05:00',
            'America/Montreal' => '-05:00',
            'America/Nassau' => '-05:00',
            'America/New_York' => '-05:00',
            'America/Nipigon' => '-05:00',
            'America/Panama' => '-05:00',
            'America/Pangnirtung' => '-05:00',
            'America/Indiana/Petersburg' => '-05:00',
            'America/Port-au-Prince' => '-05:00',
            'America/Thunder_Bay' => '-05:00',
            'America/Toronto' => '-05:00',
            'America/Indiana/Vevay' => '-05:00',
            'America/Indiana/Vincennes' => '-05:00',
            'America/Indiana/Winamac' => '-05:00',
            'America/Caracas' => '-04:30',
            'America/Anguilla' => '-04:00',
            'America/Antigua' => '-04:00',
            'America/Aruba' => '-04:00',
            'America/Asuncion' => '-04:00',
            'America/Barbados' => '-04:00',
            'Atlantic/Bermuda' => '-04:00',
            'America/Blanc-Sablon' => '-04:00',
            'America/Boa_Vista' => '-04:00',
            'America/Campo_Grande' => '-04:00',
            'America/Cuiaba' => '-04:00',
            'America/Curacao' => '-04:00',
            'America/Dominica' => '-04:00',
            'America/Eirunepe' => '-04:00',
            'America/Glace_Bay' => '-04:00',
            'America/Goose_Bay' => '-04:00',
            'America/Grenada' => '-04:00',
            'America/Guadeloupe' => '-04:00',
            'America/Guyana' => '-04:00',
            'America/Halifax' => '-04:00',
            'America/Kralendijk' => '-04:00',
            'America/La_Paz' => '-04:00',
            'America/Lower_Princes' => '-04:00',
            'America/Manaus' => '-04:00',
            'America/Marigot' => '-04:00',
            'America/Martinique' => '-04:00',
            'America/Moncton' => '-04:00',
            'America/Montserrat' => '-04:00',
            'Antarctica/Palmer' => '-04:00',
            'America/Port_of_Spain' => '-04:00',
            'America/Porto_Velho' => '-04:00',
            'America/Puerto_Rico' => '-04:00',
            'America/Rio_Branco' => '-04:00',
            'America/Santiago' => '-04:00',
            'America/Santo_Domingo' => '-04:00',
            'America/St_Barthelemy' => '-04:00',
            'America/St_Kitts' => '-04:00',
            'America/St_Lucia' => '-04:00',
            'America/St_Thomas' => '-04:00',
            'America/St_Vincent' => '-04:00',
            'America/Thule' => '-04:00',
            'America/Tortola' => '-04:00',
            'America/St_Johns' => '-03:30',
            'America/Araguaina' => '-03:00',
            'America/Bahia' => '-03:00',
            'America/Belem' => '-03:00',
            'America/Argentina/Buenos_Aires' => '-03:00',
            'America/Argentina/Catamarca' => '-03:00',
            'America/Cayenne' => '-03:00',
            'America/Argentina/Cordoba' => '-03:00',
            'America/Fortaleza' => '-03:00',
            'America/Godthab' => '-03:00',
            'America/Argentina/Jujuy' => '-03:00',
            'America/Argentina/La_Rioja' => '-03:00',
            'America/Maceio' => '-03:00',
            'America/Argentina/Mendoza' => '-03:00',
            'America/Miquelon' => '-03:00',
            'America/Montevideo' => '-03:00',
            'America/Paramaribo' => '-03:00',
            'America/Recife' => '-03:00',
            'America/Argentina/Rio_Gallegos' => '-03:00',
            'Antarctica/Rothera' => '-03:00',
            'America/Argentina/Salta' => '-03:00',
            'America/Argentina/San_Juan' => '-03:00',
            'America/Argentina/San_Luis' => '-03:00',
            'America/Santarem' => '-03:00',
            'America/Sao_Paulo' => '-03:00',
            'Atlantic/Stanley' => '-03:00',
            'America/Argentina/Tucuman' => '-03:00',
            'America/Argentina/Ushuaia' => '-03:00',
            'America/Noronha' => '-02:00',
            'Atlantic/South_Georgia' => '-02:00',
            'Atlantic/Azores' => '-01:00',
            'Atlantic/Cape_Verde' => '-01:00',
            'America/Scoresbysund' => '-01:00',
            'Africa/Abidjan' => '+00:00',
            'Africa/Accra' => '+00:00',
            'Africa/Bamako' => '+00:00',
            'Africa/Banjul' => '+00:00',
            'Africa/Bissau' => '+00:00',
            'Atlantic/Canary' => '+00:00',
            'Africa/Casablanca' => '+00:00',
            'Africa/Conakry' => '+00:00',
            'Africa/Dakar' => '+00:00',
            'America/Danmarkshavn' => '+00:00',
            'Europe/Dublin' => '+00:00',
            'Africa/El_Aaiun' => '+00:00',
            'Atlantic/Faroe' => '+00:00',
            'Africa/Freetown' => '+00:00',
            'Europe/Guernsey' => '+00:00',
            'Europe/Isle_of_Man' => '+00:00',
            'Europe/Jersey' => '+00:00',
            'Europe/Lisbon' => '+00:00',
            'Africa/Lome' => '+00:00',
            'Europe/London' => '+00:00',
            'Atlantic/Madeira' => '+00:00',
            'Africa/Monrovia' => '+00:00',
            'Africa/Nouakchott' => '+00:00',
            'Africa/Ouagadougou' => '+00:00',
            'Atlantic/Reykjavik' => '+00:00',
            'Africa/Sao_Tome' => '+00:00',
            'Atlantic/St_Helena' => '+00:00',
            'UTC' => '+00:00',
            'Africa/Algiers' => '+01:00',
            'Europe/Amsterdam' => '+01:00',
            'Europe/Andorra' => '+01:00',
            'Africa/Bangui' => '+01:00',
            'Europe/Belgrade' => '+01:00',
            'Europe/Berlin' => '+01:00',
            'Europe/Bratislava' => '+01:00',
            'Africa/Brazzaville' => '+01:00',
            'Europe/Brussels' => '+01:00',
            'Europe/Budapest' => '+01:00',
            'Europe/Busingen' => '+01:00',
            'Africa/Ceuta' => '+01:00',
            'Europe/Copenhagen' => '+01:00',
            'Africa/Douala' => '+01:00',
            'Europe/Gibraltar' => '+01:00',
            'Africa/Kinshasa' => '+01:00',
            'Africa/Lagos' => '+01:00',
            'Africa/Libreville' => '+01:00',
            'Europe/Ljubljana' => '+01:00',
            'Arctic/Longyearbyen' => '+01:00',
            'Africa/Luanda' => '+01:00',
            'Europe/Luxembourg' => '+01:00',
            'Europe/Madrid' => '+01:00',
            'Africa/Malabo' => '+01:00',
            'Europe/Malta' => '+01:00',
            'Europe/Monaco' => '+01:00',
            'Africa/Ndjamena' => '+01:00',
            'Africa/Niamey' => '+01:00',
            'Europe/Oslo' => '+01:00',
            'Europe/Paris' => '+01:00',
            'Europe/Podgorica' => '+01:00',
            'Africa/Porto-Novo' => '+01:00',
            'Europe/Prague' => '+01:00',
            'Europe/Rome' => '+01:00',
            'Europe/San_Marino' => '+01:00',
            'Europe/Sarajevo' => '+01:00',
            'Europe/Skopje' => '+01:00',
            'Europe/Stockholm' => '+01:00',
            'Europe/Tirane' => '+01:00',
            'Africa/Tripoli' => '+01:00',
            'Africa/Tunis' => '+01:00',
            'Europe/Vaduz' => '+01:00',
            'Europe/Vatican' => '+01:00',
            'Europe/Vienna' => '+01:00',
            'Europe/Warsaw' => '+01:00',
            'Africa/Windhoek' => '+01:00',
            'Europe/Zagreb' => '+01:00',
            'Europe/Zurich' => '+01:00',
            'Europe/Athens' => '+02:00',
            'Asia/Beirut' => '+02:00',
            'Africa/Blantyre' => '+02:00',
            'Europe/Bucharest' => '+02:00',
            'Africa/Bujumbura' => '+02:00',
            'Africa/Cairo' => '+02:00',
            'Europe/Chisinau' => '+02:00',
            'Asia/Damascus' => '+02:00',
            'Africa/Gaborone' => '+02:00',
            'Asia/Gaza' => '+02:00',
            'Africa/Harare' => '+02:00',
            'Asia/Hebron' => '+02:00',
            'Europe/Helsinki' => '+02:00',
            'Europe/Istanbul' => '+02:00',
            'Asia/Jerusalem' => '+02:00',
            'Africa/Johannesburg' => '+02:00',
            'Europe/Kiev' => '+02:00',
            'Africa/Kigali' => '+02:00',
            'Africa/Lubumbashi' => '+02:00',
            'Africa/Lusaka' => '+02:00',
            'Africa/Maputo' => '+02:00',
            'Europe/Mariehamn' => '+02:00',
            'Africa/Maseru' => '+02:00',
            'Africa/Mbabane' => '+02:00',
            'Asia/Nicosia' => '+02:00',
            'Europe/Riga' => '+02:00',
            'Europe/Simferopol' => '+02:00',
            'Europe/Sofia' => '+02:00',
            'Europe/Tallinn' => '+02:00',
            'Europe/Uzhgorod' => '+02:00',
            'Europe/Vilnius' => '+02:00',
            'Europe/Zaporozhye' => '+02:00',
            'Africa/Addis_Ababa' => '+03:00',
            'Asia/Aden' => '+03:00',
            'Asia/Amman' => '+03:00',
            'Indian/Antananarivo' => '+03:00',
            'Africa/Asmara' => '+03:00',
            'Asia/Baghdad' => '+03:00',
            'Asia/Bahrain' => '+03:00',
            'Indian/Comoro' => '+03:00',
            'Africa/Dar_es_Salaam' => '+03:00',
            'Africa/Djibouti' => '+03:00',
            'Africa/Juba' => '+03:00',
            'Europe/Kaliningrad' => '+03:00',
            'Africa/Kampala' => '+03:00',
            'Africa/Khartoum' => '+03:00',
            'Asia/Kuwait' => '+03:00',
            'Indian/Mayotte' => '+03:00',
            'Europe/Minsk' => '+03:00',
            'Africa/Mogadishu' => '+03:00',
            'Africa/Nairobi' => '+03:00',
            'Asia/Qatar' => '+03:00',
            'Asia/Riyadh' => '+03:00',
            'Antarctica/Syowa' => '+03:00',
            'Asia/Tehran' => '+03:30',
            'Asia/Baku' => '+04:00',
            'Asia/Dubai' => '+04:00',
            'Indian/Mahe' => '+04:00',
            'Indian/Mauritius' => '+04:00',
            'Europe/Moscow' => '+04:00',
            'Asia/Muscat' => '+04:00',
            'Indian/Reunion' => '+04:00',
            'Europe/Samara' => '+04:00',
            'Asia/Tbilisi' => '+04:00',
            'Europe/Volgograd' => '+04:00',
            'Asia/Yerevan' => '+04:00',
            'Asia/Kabul' => '+04:30',
            'Asia/Aqtau' => '+05:00',
            'Asia/Aqtobe' => '+05:00',
            'Asia/Ashgabat' => '+05:00',
            'Asia/Dushanbe' => '+05:00',
            'Asia/Karachi' => '+05:00',
            'Indian/Kerguelen' => '+05:00',
            'Indian/Maldives' => '+05:00',
            'Antarctica/Mawson' => '+05:00',
            'Asia/Oral' => '+05:00',
            'Asia/Samarkand' => '+05:00',
            'Asia/Tashkent' => '+05:00',
            'Asia/Colombo' => '+05:30',
            'Asia/Kolkata' => '+05:30',
            'Asia/Kathmandu' => '+05:45',
            'Asia/Almaty' => '+06:00',
            'Asia/Bishkek' => '+06:00',
            'Indian/Chagos' => '+06:00',
            'Asia/Dhaka' => '+06:00',
            'Asia/Qyzylorda' => '+06:00',
            'Asia/Thimphu' => '+06:00',
            'Antarctica/Vostok' => '+06:00',
            'Asia/Yekaterinburg' => '+06:00',
            'Indian/Cocos' => '+06:30',
            'Asia/Rangoon' => '+06:30',
            'Asia/Bangkok' => '+07:00',
            'Indian/Christmas' => '+07:00',
            'Antarctica/Davis' => '+07:00',
            'Asia/Ho_Chi_Minh' => '+07:00',
            'Asia/Hovd' => '+07:00',
            'Asia/Jakarta' => '+07:00',
            'Asia/Novokuznetsk' => '+07:00',
            'Asia/Novosibirsk' => '+07:00',
            'Asia/Omsk' => '+07:00',
            'Asia/Phnom_Penh' => '+07:00',
            'Asia/Pontianak' => '+07:00',
            'Asia/Vientiane' => '+07:00',
            'Asia/Brunei' => '+08:00',
            'Antarctica/Casey' => '+08:00',
            'Asia/Choibalsan' => '+08:00',
            'Asia/Chongqing' => '+08:00',
            'Asia/Harbin' => '+08:00',
            'Asia/Hong_Kong' => '+08:00',
            'Asia/Kashgar' => '+08:00',
            'Asia/Krasnoyarsk' => '+08:00',
            'Asia/Kuala_Lumpur' => '+08:00',
            'Asia/Kuching' => '+08:00',
            'Asia/Macau' => '+08:00',
            'Asia/Makassar' => '+08:00',
            'Asia/Manila' => '+08:00',
            'Australia/Perth' => '+08:00',
            'Asia/Shanghai' => '+08:00',
            'Asia/Singapore' => '+08:00',
            'Asia/Taipei' => '+08:00',
            'Asia/Ulaanbaatar' => '+08:00',
            'Asia/Urumqi' => '+08:00',
            'Australia/Eucla' => '+08:45',
            'Asia/Dili' => '+09:00',
            'Asia/Irkutsk' => '+09:00',
            'Asia/Jayapura' => '+09:00',
            'Pacific/Palau' => '+09:00',
            'Asia/Pyongyang' => '+09:00',
            'Asia/Seoul' => '+09:00',
            'Asia/Tokyo' => '+09:00',
            'Australia/Adelaide' => '+09:30',
            'Australia/Broken_Hill' => '+09:30',
            'Australia/Darwin' => '+09:30',
            'Australia/Brisbane' => '+10:00',
            'Pacific/Chuuk' => '+10:00',
            'Australia/Currie' => '+10:00',
            'Antarctica/DumontDUrville' => '+10:00',
            'Pacific/Guam' => '+10:00',
            'Australia/Hobart' => '+10:00',
            'Asia/Khandyga' => '+10:00',
            'Australia/Lindeman' => '+10:00',
            'Australia/Melbourne' => '+10:00',
            'Pacific/Port_Moresby' => '+10:00',
            'Pacific/Saipan' => '+10:00',
            'Australia/Sydney' => '+10:00',
            'Asia/Yakutsk' => '+10:00',
            'Australia/Lord_Howe' => '+10:30',
            'Pacific/Efate' => '+11:00',
            'Pacific/Guadalcanal' => '+11:00',
            'Pacific/Kosrae' => '+11:00',
            'Antarctica/Macquarie' => '+11:00',
            'Pacific/Noumea' => '+11:00',
            'Pacific/Pohnpei' => '+11:00',
            'Asia/Sakhalin' => '+11:00',
            'Asia/Ust-Nera' => '+11:00',
            'Asia/Vladivostok' => '+11:00',
            'Pacific/Norfolk' => '+11:30',
            'Asia/Anadyr' => '+12:00',
            'Pacific/Auckland' => '+12:00',
            'Pacific/Fiji' => '+12:00',
            'Pacific/Funafuti' => '+12:00',
            'Asia/Kamchatka' => '+12:00',
            'Pacific/Kwajalein' => '+12:00',
            'Asia/Magadan' => '+12:00',
            'Pacific/Majuro' => '+12:00',
            'Antarctica/McMurdo' => '+12:00',
            'Pacific/Nauru' => '+12:00',
            'Antarctica/South_Pole' => '+12:00',
            'Pacific/Tarawa' => '+12:00',
            'Pacific/Wake' => '+12:00',
            'Pacific/Wallis' => '+12:00',
            'Pacific/Chatham' => '+12:45',
            'Pacific/Apia' => '+13:00',
            'Pacific/Enderbury' => '+13:00',
            'Pacific/Fakaofo' => '+13:00',
            'Pacific/Tongatapu' => '+13:00',
            'Pacific/Kiritimati' => '+14:00',
        ];

        $list = [];

        foreach ($zones as $zone => $offset) {
            $list[] = [
                'value' => $zone,
                'key' => sprintf('(UTC%s) %s', $offset, self::place($zone)),
            ];
        }

        return $list;
    }

    /**
     * The place an identifier names: whatever follows the last slash, read
     * with spaces instead of underscores. Saints keep the stop the
     * abbreviation is written with in prose.
     */
    private static function place(string $zone): string
    {
        $segments = explode('/', $zone);

        return preg_replace('/^St /', 'St. ', str_replace('_', ' ', end($segments)));
    }
}