//! Localized strings describing font names and other metadata.
//!
//! This provides higher level interfaces for accessing the data in the
//! OpenType [name](https://learn.microsoft.com/en-us/typography/opentype/spec/name)
//! table.
//!
//! # Example
//! The following function will print all localized strings from the set
//! of predefined identifiers in a font:
//! ```
//! use skrifa::{string::StringId, MetadataProvider};
//!
//! fn print_well_known_strings<'a>(font: &impl MetadataProvider<'a>) {
//!     for id in StringId::predefined() {
//!         let strings = font.localized_strings(id);
//!         if strings.clone().next().is_some() {
//!             println!("[{:?}]", id);
//!             for string in font.localized_strings(id) {
//!                 println!("{:?} {}", string.language(), string.to_string());
//!             }
//!         }
//!     }
//! }
//! ```

use read_fonts::{
    tables::name::{CharIter, Name, NameRecord, NameString},
    FontRef, TableProvider,
};

use core::fmt;

#[doc(inline)]
pub use read_fonts::types::NameId as StringId;

/// Iterator over the characters of a string.
#[derive(Clone)]
pub struct Chars<'a> {
    inner: Option<CharIter<'a>>,
}

impl Iterator for Chars<'_> {
    type Item = char;

    fn next(&mut self) -> Option<Self::Item> {
        self.inner.as_mut()?.next()
    }
}

/// Iterator over a collection of localized strings for a specific identifier.
#[derive(Clone)]
pub struct LocalizedStrings<'a> {
    name: Option<Name<'a>>,
    records: core::slice::Iter<'a, NameRecord>,
    id: StringId,
}

impl<'a> LocalizedStrings<'a> {
    /// Creates a new localized string iterator from the given font and string identifier.
    pub fn new(font: &FontRef<'a>, id: StringId) -> Self {
        let name = font.name().ok();
        let records = name
            .as_ref()
            .map(|name| name.name_record().iter())
            .unwrap_or([].iter());
        Self { name, records, id }
    }

    /// Returns the informational string identifier for this iterator.
    pub fn id(&self) -> StringId {
        self.id
    }

    /// Returns the best available English string or the first string in the sequence.
    ///
    /// This prefers the following languages, in order: "en-US", "en",
    /// "" (empty, for bare Unicode platform strings which don't have an associated
    /// language).
    ///
    /// If none of these are found, returns the first string, or `None` if the sequence
    /// is empty.
    pub fn english_or_first(self) -> Option<LocalizedString<'a>> {
        let mut best_rank = -1;
        let mut best_string = None;
        for (i, string) in self.enumerate() {
            let rank = match (i, string.language()) {
                (_, Some("en-US")) => return Some(string),
                (_, Some("en")) => 2,
                (_, None) => 1,
                (0, _) => 0,
                _ => continue,
            };
            if rank > best_rank {
                best_rank = rank;
                best_string = Some(string);
            }
        }
        best_string
    }
}

impl<'a> Iterator for LocalizedStrings<'a> {
    type Item = LocalizedString<'a>;

    fn next(&mut self) -> Option<Self::Item> {
        let name = self.name.as_ref()?;
        loop {
            let record = self.records.next()?;
            if record.name_id() == self.id {
                return Some(LocalizedString::new(name, record));
            }
        }
    }
}

impl Default for LocalizedStrings<'_> {
    fn default() -> Self {
        Self {
            name: None,
            records: [].iter(),
            id: StringId::default(),
        }
    }
}

/// String containing a name or other font metadata in a specific language.
#[derive(Clone, Debug)]
pub struct LocalizedString<'a> {
    language: Option<Language>,
    value: Option<NameString<'a>>,
}

impl<'a> LocalizedString<'a> {
    fn new(name: &Name<'a>, record: &NameRecord) -> Self {
        let language = Language::new(name, record);
        let value = record.string(name.string_data()).ok();
        Self { language, value }
    }

    /// Returns the BCP-47 language identifier for the localized string.
    pub fn language(&self) -> Option<&str> {
        self.language.as_ref().map(|language| language.as_str())
    }

    /// Returns an iterator over the characters of the localized string.
    pub fn chars(&self) -> Chars<'a> {
        Chars {
            inner: self.value.map(|value| value.chars()),
        }
    }
}

impl fmt::Display for LocalizedString<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        for ch in self.chars() {
            ch.fmt(f)?;
        }
        Ok(())
    }
}

/// This value is chosen arbitrarily to accommodate common language tags that
/// are almost always <= 11 bytes (LLL-SSSS-RR where L is primary language, S
/// is script and R is region) and to keep the Language enum at a reasonable
/// 32 bytes in size.
const MAX_INLINE_LANGUAGE_LEN: usize = 30;

#[derive(Copy, Clone, Debug)]
#[repr(u8)]
enum Language {
    Inline {
        buf: [u8; MAX_INLINE_LANGUAGE_LEN],
        len: u8,
    },
    Static(&'static str),
}

impl Language {
    fn new(name: &Name, record: &NameRecord) -> Option<Self> {
        let language_id = record.language_id();
        // For version 1 name tables, prefer language tags:
        // https://learn.microsoft.com/en-us/typography/opentype/spec/name#naming-table-version-1
        const BASE_LANGUAGE_TAG_ID: u16 = 0x8000;
        if name.version() == 1 && language_id >= BASE_LANGUAGE_TAG_ID {
            let index = (language_id - BASE_LANGUAGE_TAG_ID) as usize;
            let language_string = name
                .lang_tag_record()?
                .get(index)?
                .lang_tag(name.string_data())
                .ok()?;
            Self::from_name_string(&language_string)
        } else {
            match record.platform_id() {
                // We only match Macintosh and Windows language ids.
                1 | 3 => Self::from_language_id(language_id),
                _ => None,
            }
        }
    }

    /// Decodes a language tag string into an inline ASCII byte sequence.
    fn from_name_string(s: &NameString) -> Option<Self> {
        let mut buf = [0u8; MAX_INLINE_LANGUAGE_LEN];
        let mut len = 0;
        for ch in s.chars() {
            // From "Tags for Identifying Languages" <https://www.rfc-editor.org/rfc/rfc5646.html#page-6>:
            // "Although [RFC5234] refers to octets, the language tags described in
            // this document are sequences of characters from the US-ASCII [ISO646]
            // repertoire"
            // Therefore we assume that non-ASCII characters signal an invalid language tag.
            if !ch.is_ascii() || len == MAX_INLINE_LANGUAGE_LEN {
                return None;
            }
            buf[len] = ch as u8;
            len += 1;
        }
        Some(Self::Inline {
            buf,
            len: len as u8,
        })
    }

    fn from_language_id(language_id: u16) -> Option<Self> {
        Some(Self::Static(language_id_to_bcp47(language_id)?))
    }

    fn as_str(&self) -> &str {
        match self {
            Self::Inline { buf: data, len } => {
                let data = &data[..*len as usize];
                core::str::from_utf8(data).unwrap_or_default()
            }
            Self::Static(str) => str,
        }
    }
}

/// Converts an OpenType language identifier to a BCP-47 language tag.
fn language_id_to_bcp47(language_id: u16) -> Option<&'static str> {
    match LANGUAGE_ID_TO_BCP47.binary_search_by(|entry| entry.0.cmp(&language_id)) {
        Ok(ix) => LANGUAGE_ID_TO_BCP47.get(ix).map(|entry| entry.1),
        _ => None,
    }
}

/// Mapping of OpenType name table language identifier to BCP-47 language tag.
/// Borrowed from Skia: <https://skia.googlesource.com/skia/+/refs/heads/main/src/sfnt/SkOTTable_name.cpp#98>
const LANGUAGE_ID_TO_BCP47: &[(u16, &str)] = &[
    /* A mapping from Mac Language Designators to BCP 47 codes.
     *  The following list was constructed more or less manually.
     *  Apple now uses BCP 47 (post OSX10.4), so there will be no new entries.
     */
    (0, "en"),        //English
    (1, "fr"),        //French
    (2, "de"),        //German
    (3, "it"),        //Italian
    (4, "nl"),        //Dutch
    (5, "sv"),        //Swedish
    (6, "es"),        //Spanish
    (7, "da"),        //Danish
    (8, "pt"),        //Portuguese
    (9, "nb"),        //Norwegian
    (10, "he"),       //Hebrew
    (11, "ja"),       //Japanese
    (12, "ar"),       //Arabic
    (13, "fi"),       //Finnish
    (14, "el"),       //Greek
    (15, "is"),       //Icelandic
    (16, "mt"),       //Maltese
    (17, "tr"),       //Turkish
    (18, "hr"),       //Croatian
    (19, "zh-Hant"),  //Chinese (Traditional)
    (20, "ur"),       //Urdu
    (21, "hi"),       //Hindi
    (22, "th"),       //Thai
    (23, "ko"),       //Korean
    (24, "lt"),       //Lithuanian
    (25, "pl"),       //Polish
    (26, "hu"),       //Hungarian
    (27, "et"),       //Estonian
    (28, "lv"),       //Latvian
    (29, "se"),       //Sami
    (30, "fo"),       //Faroese
    (31, "fa"),       //Farsi (Persian)
    (32, "ru"),       //Russian
    (33, "zh-Hans"),  //Chinese (Simplified)
    (34, "nl"),       //Dutch
    (35, "ga"),       //Irish(Gaelic)
    (36, "sq"),       //Albanian
    (37, "ro"),       //Romanian
    (38, "cs"),       //Czech
    (39, "sk"),       //Slovak
    (40, "sl"),       //Slovenian
    (41, "yi"),       //Yiddish
    (42, "sr"),       //Serbian
    (43, "mk"),       //Macedonian
    (44, "bg"),       //Bulgarian
    (45, "uk"),       //Ukrainian
    (46, "be"),       //Byelorussian
    (47, "uz"),       //Uzbek
    (48, "kk"),       //Kazakh
    (49, "az-Cyrl"),  //Azerbaijani (Cyrillic)
    (50, "az-Arab"),  //Azerbaijani (Arabic)
    (51, "hy"),       //Armenian
    (52, "ka"),       //Georgian
    (53, "mo"),       //Moldavian
    (54, "ky"),       //Kirghiz
    (55, "tg"),       //Tajiki
    (56, "tk"),       //Turkmen
    (57, "mn-Mong"),  //Mongolian (Traditional)
    (58, "mn-Cyrl"),  //Mongolian (Cyrillic)
    (59, "ps"),       //Pashto
    (60, "ku"),       //Kurdish
    (61, "ks"),       //Kashmiri
    (62, "sd"),       //Sindhi
    (63, "bo"),       //Tibetan
    (64, "ne"),       //Nepali
    (65, "sa"),       //Sanskrit
    (66, "mr"),       //Marathi
    (67, "bn"),       //Bengali
    (68, "as"),       //Assamese
    (69, "gu"),       //Gujarati
    (70, "pa"),       //Punjabi
    (71, "or"),       //Oriya
    (72, "ml"),       //Malayalam
    (73, "kn"),       //Kannada
    (74, "ta"),       //Tamil
    (75, "te"),       //Telugu
    (76, "si"),       //Sinhalese
    (77, "my"),       //Burmese
    (78, "km"),       //Khmer
    (79, "lo"),       //Lao
    (80, "vi"),       //Vietnamese
    (81, "id"),       //Indonesian
    (82, "tl"),       //Tagalog
    (83, "ms-Latn"),  //Malay (Roman)
    (84, "ms-Arab"),  //Malay (Arabic)
    (85, "am"),       //Amharic
    (86, "ti"),       //Tigrinya
    (87, "om"),       //Oromo
    (88, "so"),       //Somali
    (89, "sw"),       //Swahili
    (90, "rw"),       //Kinyarwanda/Ruanda
    (91, "rn"),       //Rundi
    (92, "ny"),       //Nyanja/Chewa
    (93, "mg"),       //Malagasy
    (94, "eo"),       //Esperanto
    (128, "cy"),      //Welsh
    (129, "eu"),      //Basque
    (130, "ca"),      //Catalan
    (131, "la"),      //Latin
    (132, "qu"),      //Quechua
    (133, "gn"),      //Guarani
    (134, "ay"),      //Aymara
    (135, "tt"),      //Tatar
    (136, "ug"),      //Uighur
    (137, "dz"),      //Dzongkha
    (138, "jv-Latn"), //Javanese (Roman)
    (139, "su-Latn"), //Sundanese (Roman)
    (140, "gl"),      //Galician
    (141, "af"),      //Afrikaans
    (142, "br"),      //Breton
    (143, "iu"),      //Inuktitut
    (144, "gd"),      //Scottish (Gaelic)
    (145, "gv"),      //Manx (Gaelic)
    (146, "ga"),      //Irish (Gaelic with Lenition)
    (147, "to"),      //Tongan
    (148, "el"),      //Greek (Polytonic) Note: ISO 15924 does not have an equivalent script name.
    (149, "kl"),      //Greenlandic
    (150, "az-Latn"), //Azerbaijani (Roman)
    (151, "nn"),      //Nynorsk
    /* A mapping from Windows LCID to BCP 47 codes.
     *  This list is the sorted, curated output of tools/win_lcid.cpp.
     *  Note that these are sorted by value for quick binary lookup, and not logically by lsb.
     *  The 'bare' language ids (e.g. 0x0001 for Arabic) are omitted
     *  as they do not appear as valid language ids in the OpenType specification.
     */
    (0x0401, "ar-SA"),        //Arabic
    (0x0402, "bg-BG"),        //Bulgarian
    (0x0403, "ca-ES"),        //Catalan
    (0x0404, "zh-TW"),        //Chinese (Traditional)
    (0x0405, "cs-CZ"),        //Czech
    (0x0406, "da-DK"),        //Danish
    (0x0407, "de-DE"),        //German
    (0x0408, "el-GR"),        //Greek
    (0x0409, "en-US"),        //English
    (0x040a, "es-ES_tradnl"), //Spanish
    (0x040b, "fi-FI"),        //Finnish
    (0x040c, "fr-FR"),        //French
    (0x040d, "he-IL"),        //Hebrew
    (0x040d, "he"),           //Hebrew
    (0x040e, "hu-HU"),        //Hungarian
    (0x040e, "hu"),           //Hungarian
    (0x040f, "is-IS"),        //Icelandic
    (0x0410, "it-IT"),        //Italian
    (0x0411, "ja-JP"),        //Japanese
    (0x0412, "ko-KR"),        //Korean
    (0x0413, "nl-NL"),        //Dutch
    (0x0414, "nb-NO"),        //Norwegian (Bokmål)
    (0x0415, "pl-PL"),        //Polish
    (0x0416, "pt-BR"),        //Portuguese
    (0x0417, "rm-CH"),        //Romansh
    (0x0418, "ro-RO"),        //Romanian
    (0x0419, "ru-RU"),        //Russian
    (0x041a, "hr-HR"),        //Croatian
    (0x041b, "sk-SK"),        //Slovak
    (0x041c, "sq-AL"),        //Albanian
    (0x041d, "sv-SE"),        //Swedish
    (0x041e, "th-TH"),        //Thai
    (0x041f, "tr-TR"),        //Turkish
    (0x0420, "ur-PK"),        //Urdu
    (0x0421, "id-ID"),        //Indonesian
    (0x0422, "uk-UA"),        //Ukrainian
    (0x0423, "be-BY"),        //Belarusian
    (0x0424, "sl-SI"),        //Slovenian
    (0x0425, "et-EE"),        //Estonian
    (0x0426, "lv-LV"),        //Latvian
    (0x0427, "lt-LT"),        //Lithuanian
    (0x0428, "tg-Cyrl-TJ"),   //Tajik (Cyrillic)
    (0x0429, "fa-IR"),        //Persian
    (0x042a, "vi-VN"),        //Vietnamese
    (0x042b, "hy-AM"),        //Armenian
    (0x042c, "az-Latn-AZ"),   //Azeri (Latin)
    (0x042d, "eu-ES"),        //Basque
    (0x042e, "hsb-DE"),       //Upper Sorbian
    (0x042f, "mk-MK"),        //Macedonian (FYROM)
    (0x0432, "tn-ZA"),        //Setswana
    (0x0434, "xh-ZA"),        //isiXhosa
    (0x0435, "zu-ZA"),        //isiZulu
    (0x0436, "af-ZA"),        //Afrikaans
    (0x0437, "ka-GE"),        //Georgian
    (0x0438, "fo-FO"),        //Faroese
    (0x0439, "hi-IN"),        //Hindi
    (0x043a, "mt-MT"),        //Maltese
    (0x043b, "se-NO"),        //Sami (Northern)
    (0x043e, "ms-MY"),        //Malay
    (0x043f, "kk-KZ"),        //Kazakh
    (0x0440, "ky-KG"),        //Kyrgyz
    (0x0441, "sw-KE"),        //Kiswahili
    (0x0442, "tk-TM"),        //Turkmen
    (0x0443, "uz-Latn-UZ"),   //Uzbek (Latin)
    (0x0443, "uz"),           //Uzbek
    (0x0444, "tt-RU"),        //Tatar
    (0x0445, "bn-IN"),        //Bengali
    (0x0446, "pa-IN"),        //Punjabi
    (0x0447, "gu-IN"),        //Gujarati
    (0x0448, "or-IN"),        //Oriya
    (0x0449, "ta-IN"),        //Tamil
    (0x044a, "te-IN"),        //Telugu
    (0x044b, "kn-IN"),        //Kannada
    (0x044c, "ml-IN"),        //Malayalam
    (0x044d, "as-IN"),        //Assamese
    (0x044e, "mr-IN"),        //Marathi
    (0x044f, "sa-IN"),        //Sanskrit
    (0x0450, "mn-Cyrl"),      //Mongolian (Cyrillic)
    (0x0451, "bo-CN"),        //Tibetan
    (0x0452, "cy-GB"),        //Welsh
    (0x0453, "km-KH"),        //Khmer
    (0x0454, "lo-LA"),        //Lao
    (0x0456, "gl-ES"),        //Galician
    (0x0457, "kok-IN"),       //Konkani
    (0x045a, "syr-SY"),       //Syriac
    (0x045b, "si-LK"),        //Sinhala
    (0x045d, "iu-Cans-CA"),   //Inuktitut (Syllabics)
    (0x045e, "am-ET"),        //Amharic
    (0x0461, "ne-NP"),        //Nepali
    (0x0462, "fy-NL"),        //Frisian
    (0x0463, "ps-AF"),        //Pashto
    (0x0464, "fil-PH"),       //Filipino
    (0x0465, "dv-MV"),        //Divehi
    (0x0468, "ha-Latn-NG"),   //Hausa (Latin)
    (0x046a, "yo-NG"),        //Yoruba
    (0x046b, "quz-BO"),       //Quechua
    (0x046c, "nso-ZA"),       //Sesotho sa Leboa
    (0x046d, "ba-RU"),        //Bashkir
    (0x046e, "lb-LU"),        //Luxembourgish
    (0x046f, "kl-GL"),        //Greenlandic
    (0x0470, "ig-NG"),        //Igbo
    (0x0478, "ii-CN"),        //Yi
    (0x047a, "arn-CL"),       //Mapudungun
    (0x047c, "moh-CA"),       //Mohawk
    (0x047e, "br-FR"),        //Breton
    (0x0480, "ug-CN"),        //Uyghur
    (0x0481, "mi-NZ"),        //Maori
    (0x0482, "oc-FR"),        //Occitan
    (0x0483, "co-FR"),        //Corsican
    (0x0484, "gsw-FR"),       //Alsatian
    (0x0485, "sah-RU"),       //Yakut
    (0x0486, "qut-GT"),       //K'iche
    (0x0487, "rw-RW"),        //Kinyarwanda
    (0x0488, "wo-SN"),        //Wolof
    (0x048c, "prs-AF"),       //Dari
    (0x0491, "gd-GB"),        //Scottish Gaelic
    (0x0801, "ar-IQ"),        //Arabic
    (0x0804, "zh-Hans"),      //Chinese (Simplified)
    (0x0807, "de-CH"),        //German
    (0x0809, "en-GB"),        //English
    (0x080a, "es-MX"),        //Spanish
    (0x080c, "fr-BE"),        //French
    (0x0810, "it-CH"),        //Italian
    (0x0813, "nl-BE"),        //Dutch
    (0x0814, "nn-NO"),        //Norwegian (Nynorsk)
    (0x0816, "pt-PT"),        //Portuguese
    (0x081a, "sr-Latn-CS"),   //Serbian (Latin)
    (0x081d, "sv-FI"),        //Swedish
    (0x082c, "az-Cyrl-AZ"),   //Azeri (Cyrillic)
    (0x082e, "dsb-DE"),       //Lower Sorbian
    (0x082e, "dsb"),          //Lower Sorbian
    (0x083b, "se-SE"),        //Sami (Northern)
    (0x083c, "ga-IE"),        //Irish
    (0x083e, "ms-BN"),        //Malay
    (0x0843, "uz-Cyrl-UZ"),   //Uzbek (Cyrillic)
    (0x0845, "bn-BD"),        //Bengali
    (0x0850, "mn-Mong-CN"),   //Mongolian (Traditional Mongolian)
    (0x085d, "iu-Latn-CA"),   //Inuktitut (Latin)
    (0x085f, "tzm-Latn-DZ"),  //Tamazight (Latin)
    (0x086b, "quz-EC"),       //Quechua
    (0x0c01, "ar-EG"),        //Arabic
    (0x0c04, "zh-Hant"),      //Chinese (Traditional)
    (0x0c07, "de-AT"),        //German
    (0x0c09, "en-AU"),        //English
    (0x0c0a, "es-ES"),        //Spanish
    (0x0c0c, "fr-CA"),        //French
    (0x0c1a, "sr-Cyrl-CS"),   //Serbian (Cyrillic)
    (0x0c3b, "se-FI"),        //Sami (Northern)
    (0x0c6b, "quz-PE"),       //Quechua
    (0x1001, "ar-LY"),        //Arabic
    (0x1004, "zh-SG"),        //Chinese (Simplified)
    (0x1007, "de-LU"),        //German
    (0x1009, "en-CA"),        //English
    (0x100a, "es-GT"),        //Spanish
    (0x100c, "fr-CH"),        //French
    (0x101a, "hr-BA"),        //Croatian (Latin)
    (0x103b, "smj-NO"),       //Sami (Lule)
    (0x1401, "ar-DZ"),        //Arabic
    (0x1404, "zh-MO"),        //Chinese (Traditional)
    (0x1407, "de-LI"),        //German
    (0x1409, "en-NZ"),        //English
    (0x140a, "es-CR"),        //Spanish
    (0x140c, "fr-LU"),        //French
    (0x141a, "bs-Latn-BA"),   //Bosnian (Latin)
    (0x141a, "bs"),           //Bosnian
    (0x143b, "smj-SE"),       //Sami (Lule)
    (0x143b, "smj"),          //Sami (Lule)
    (0x1801, "ar-MA"),        //Arabic
    (0x1809, "en-IE"),        //English
    (0x180a, "es-PA"),        //Spanish
    (0x180c, "fr-MC"),        //French
    (0x181a, "sr-Latn-BA"),   //Serbian (Latin)
    (0x183b, "sma-NO"),       //Sami (Southern)
    (0x1c01, "ar-TN"),        //Arabic
    (0x1c09, "en-ZA"),        //English
    (0x1c0a, "es-DO"),        //Spanish
    (0x1c1a, "sr-Cyrl-BA"),   //Serbian (Cyrillic)
    (0x1c3b, "sma-SE"),       //Sami (Southern)
    (0x1c3b, "sma"),          //Sami (Southern)
    (0x2001, "ar-OM"),        //Arabic
    (0x2009, "en-JM"),        //English
    (0x200a, "es-VE"),        //Spanish
    (0x201a, "bs-Cyrl-BA"),   //Bosnian (Cyrillic)
    (0x201a, "bs-Cyrl"),      //Bosnian (Cyrillic)
    (0x203b, "sms-FI"),       //Sami (Skolt)
    (0x203b, "sms"),          //Sami (Skolt)
    (0x2401, "ar-YE"),        //Arabic
    (0x2409, "en-029"),       //English
    (0x240a, "es-CO"),        //Spanish
    (0x241a, "sr-Latn-RS"),   //Serbian (Latin)
    (0x243b, "smn-FI"),       //Sami (Inari)
    (0x2801, "ar-SY"),        //Arabic
    (0x2809, "en-BZ"),        //English
    (0x280a, "es-PE"),        //Spanish
    (0x281a, "sr-Cyrl-RS"),   //Serbian (Cyrillic)
    (0x2c01, "ar-JO"),        //Arabic
    (0x2c09, "en-TT"),        //English
    (0x2c0a, "es-AR"),        //Spanish
    (0x2c1a, "sr-Latn-ME"),   //Serbian (Latin)
    (0x3001, "ar-LB"),        //Arabic
    (0x3009, "en-ZW"),        //English
    (0x300a, "es-EC"),        //Spanish
    (0x301a, "sr-Cyrl-ME"),   //Serbian (Cyrillic)
    (0x3401, "ar-KW"),        //Arabic
    (0x3409, "en-PH"),        //English
    (0x340a, "es-CL"),        //Spanish
    (0x3801, "ar-AE"),        //Arabic
    (0x380a, "es-UY"),        //Spanish
    (0x3c01, "ar-BH"),        //Arabic
    (0x3c0a, "es-PY"),        //Spanish
    (0x4001, "ar-QA"),        //Arabic
    (0x4009, "en-IN"),        //English
    (0x400a, "es-BO"),        //Spanish
    (0x4409, "en-MY"),        //English
    (0x440a, "es-SV"),        //Spanish
    (0x4809, "en-SG"),        //English
    (0x480a, "es-HN"),        //Spanish
    (0x4c0a, "es-NI"),        //Spanish
    (0x500a, "es-PR"),        //Spanish
    (0x540a, "es-US"),        //Spanish
];

#[cfg(test)]
mod tests {
    use crate::MetadataProvider;

    use super::*;
    use read_fonts::FontRef;

    #[test]
    fn localized() {
        let font = FontRef::new(font_test_data::NAMES_ONLY).unwrap();
        let mut subfamily_names = font
            .localized_strings(StringId::SUBFAMILY_NAME)
            .map(|s| (s.language().unwrap().to_string(), s.to_string()))
            .collect::<Vec<_>>();
        subfamily_names.sort_by(|a, b| a.0.cmp(&b.0));
        let expected = [
            (String::from("ar-SA"), String::from("عادي")),
            (String::from("el-GR"), String::from("Κανονικά")),
            (String::from("en"), String::from("Regular")),
            (String::from("eu-ES"), String::from("Arrunta")),
            (String::from("pl-PL"), String::from("Normalny")),
            (String::from("zh-Hans"), String::from("正常")),
        ];
        assert_eq!(subfamily_names.as_slice(), expected);
    }

    #[test]
    fn find_by_language() {
        let font = FontRef::new(font_test_data::NAMES_ONLY).unwrap();
        assert_eq!(
            font.localized_strings(StringId::SUBFAMILY_NAME)
                .find(|s| s.language() == Some("pl-PL"))
                .unwrap()
                .to_string(),
            "Normalny"
        );
    }

    #[test]
    fn english_or_first() {
        let font = FontRef::new(font_test_data::NAMES_ONLY).unwrap();
        assert_eq!(
            font.localized_strings(StringId::SUBFAMILY_NAME)
                .english_or_first()
                .unwrap()
                .to_string(),
            "Regular"
        );
    }
}