/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

#[cfg(any(target_os = "linux", target_os = "macos"))]
use base::text::{UnicodeBlock, UnicodeBlockMethod};
#[cfg(any(target_os = "linux", target_os = "macos"))]
use unicode_script::Script;

#[cfg(any(target_os = "linux", target_os = "android"))]
pub use crate::platform::freetype::{font, font_list, library_handle};
#[cfg(target_os = "macos")]
pub use crate::platform::macos::{core_text_font_cache, font, font_list};
#[cfg(target_os = "windows")]
pub use crate::platform::windows::{font, font_list};
#[cfg(any(target_os = "linux", target_os = "macos"))]
use crate::FallbackFontSelectionOptions;

#[cfg(any(target_os = "linux", target_os = "android"))]
mod freetype {
    use std::ffi::CStr;
    use std::str;

    use libc::c_char;

    /// Creates a String from the given null-terminated buffer.
    /// Panics if the buffer does not contain UTF-8.
    unsafe fn c_str_to_string(s: *const c_char) -> String {
        str::from_utf8(CStr::from_ptr(s).to_bytes())
            .unwrap()
            .to_owned()
    }

    pub mod font;

    #[cfg(all(target_os = "linux", not(target_env = "ohos"), not(ohos_mock)))]
    pub mod font_list;
    #[cfg(target_os = "android")]
    mod android {
        pub mod font_list;
        mod xml;
    }
    #[cfg(target_os = "android")]
    pub use self::android::font_list;
    #[cfg(any(target_env = "ohos", ohos_mock))]
    mod ohos {
        pub mod font_list;
    }
    #[cfg(any(target_env = "ohos", ohos_mock))]
    pub use self::ohos::font_list;

    pub mod library_handle;
}

#[cfg(target_os = "macos")]
mod macos {
    pub mod core_text_font_cache;
    pub mod font;
    pub mod font_list;
}

#[cfg(target_os = "windows")]
mod windows {
    pub mod font;
    pub mod font_list;
}

#[cfg(any(target_os = "linux", target_os = "macos"))]
pub(crate) fn add_noto_fallback_families(
    options: FallbackFontSelectionOptions,
    families: &mut Vec<&'static str>,
) {
    // TODO: Need to differentiate between traditional and simplified Han here!
    let add_chinese_families = |families: &mut Vec<&str>| {
        families.push("Noto Sans CJK HK");
        families.push("Noto Sans CJK SC");
        families.push("Noto Sans CJK TC");
        families.push("Noto Sans HK");
        families.push("Noto Sans SC");
        families.push("Noto Sans TC");
    };

    match Script::from(options.character) {
        // In most cases, COMMON and INHERITED characters will be merged into
        // their context, but if they occur without any specific script context
        // we'll just try common default fonts here.
        Script::Common | Script::Inherited | Script::Latin | Script::Cyrillic | Script::Greek => {
            families.push("Noto Sans");
        },
        // CJK-related script codes are a bit troublesome because of unification;
        // we'll probably just get HAN much of the time, so the choice of which
        // language font to try for fallback is rather arbitrary. Usually, though,
        // we hope that font prefs will have handled this earlier.
        Script::Bopomofo | Script::Han => add_chinese_families(families),
        _ => {},
    }

    if let Some(block) = options.character.block() {
        match block {
            UnicodeBlock::HalfwidthandFullwidthForms |
            UnicodeBlock::EnclosedIdeographicSupplement => add_chinese_families(families),
            UnicodeBlock::Adlam => families.push("Noto Sans Adlam"),
            UnicodeBlock::Ahom => families.push("Noto Serif Ahom"),
            UnicodeBlock::AnatolianHieroglyphs => families.push("Noto Sans AnatoHiero"),
            UnicodeBlock::Arabic |
            UnicodeBlock::ArabicExtendedA |
            UnicodeBlock::ArabicPresentationFormsA |
            UnicodeBlock::ArabicPresentationFormsB => {
                families.push("Noto Sans Arabic");
                families.push("Noto Naskh Arabic");
            },
            UnicodeBlock::ArabicMathematicalAlphabeticSymbols => {
                families.push("Noto Sans Math");
            },
            UnicodeBlock::Armenian => families.push("Noto Sans Armenian"),
            UnicodeBlock::Avestan => families.push("Noto Sans Avestan"),
            UnicodeBlock::Balinese => families.push("Noto Sans Balinese"),
            UnicodeBlock::Bamum | UnicodeBlock::BamumSupplement => families.push("Noto Sans Bamum"),
            UnicodeBlock::BassaVah => families.push("Noto Sans Bassa Vah"),
            UnicodeBlock::Batak => families.push("Noto Sans Batak"),
            UnicodeBlock::Bengali => families.push("Noto Sans Bengali"),
            UnicodeBlock::Bhaiksuki => families.push("Noto Sans Bhaiksuki"),
            UnicodeBlock::Brahmi => families.push("Noto Sans Brahmi"),
            UnicodeBlock::BraillePatterns => {
                // These characters appear to be in DejaVu Serif.
            },
            UnicodeBlock::Buginese => families.push("Noto Sans Buginese"),
            UnicodeBlock::Buhid => families.push("Noto Sans Buhid"),
            UnicodeBlock::Carian => families.push("Noto Sans Carian"),
            UnicodeBlock::CaucasianAlbanian => families.push("Noto Sans Caucasian Albanian"),
            UnicodeBlock::Chakma => families.push("Noto Sans Chakma"),
            UnicodeBlock::Cham => families.push("Noto Sans Cham"),
            UnicodeBlock::Cherokee | UnicodeBlock::CherokeeSupplement => {
                families.push("Noto Sans Cherokee")
            },
            UnicodeBlock::Coptic => families.push("Noto Sans Coptic"),
            UnicodeBlock::Cuneiform | UnicodeBlock::CuneiformNumbersandPunctuation => {
                families.push("Noto Sans Cuneiform")
            },
            UnicodeBlock::CypriotSyllabary => families.push("Noto Sans Cypriot"),
            UnicodeBlock::Deseret => families.push("Noto Sans Deseret"),
            UnicodeBlock::Devanagari |
            UnicodeBlock::DevanagariExtended |
            UnicodeBlock::CommonIndicNumberForms => families.push("Noto Sans Devanagari"),
            UnicodeBlock::Duployan => families.push("Noto Sans Duployan"),
            UnicodeBlock::EgyptianHieroglyphs => families.push("Noto Sans Egyptian Hieroglyphs"),
            UnicodeBlock::Elbasan => families.push("Noto Sans Elbasan"),
            UnicodeBlock::Ethiopic |
            UnicodeBlock::EthiopicExtended |
            UnicodeBlock::EthiopicExtendedA |
            UnicodeBlock::EthiopicSupplement => families.push("Noto Sans Ethiopic"),
            UnicodeBlock::Georgian | UnicodeBlock::GeorgianSupplement => {
                families.push("Noto Sans Georgian")
            },
            UnicodeBlock::Glagolitic | UnicodeBlock::GlagoliticSupplement => {
                families.push("Noto Sans Glagolitic")
            },
            UnicodeBlock::Gothic => families.push("Noto Sans Gothic"),
            UnicodeBlock::Grantha => families.push("Noto Sans Grantha"),
            UnicodeBlock::Gujarati => families.push("Noto Sans Gujarati"),
            UnicodeBlock::Gurmukhi => families.push("Noto Sans Gurmukhi"),
            UnicodeBlock::HangulCompatibilityJamo |
            UnicodeBlock::HangulJamo |
            UnicodeBlock::HangulJamoExtendedA |
            UnicodeBlock::HangulJamoExtendedB |
            UnicodeBlock::HangulSyllables => {
                families.push("Noto Sans KR");
                families.push("Noto Sans CJK KR");
            },
            UnicodeBlock::HanifiRohingya => families.push("Noto Sans Hanifi Rohingya"),
            UnicodeBlock::Hanunoo => families.push("Noto Sans Hanunoo"),
            UnicodeBlock::Hatran => families.push("Noto Sans Hatran"),
            UnicodeBlock::Hebrew => families.push("Noto Sans Hebrew"),
            UnicodeBlock::Hiragana |
            UnicodeBlock::Katakana |
            UnicodeBlock::KatakanaPhoneticExtensions => {
                families.push("Noto Sans JP");
                families.push("Noto Sans CJK JP");
            },
            UnicodeBlock::ImperialAramaic => families.push("Noto Sans Imperial Aramaic"),
            UnicodeBlock::InscriptionalPahlavi => families.push("Noto Sans Inscriptional Pahlavi"),
            UnicodeBlock::InscriptionalParthian => {
                families.push("Noto Sans Inscriptional Parthian")
            },
            UnicodeBlock::Javanese => families.push("Noto Sans Javanese"),
            UnicodeBlock::Kaithi => families.push("Noto Sans Kaithi"),
            UnicodeBlock::Kannada => families.push("Noto Sans Kannada"),
            UnicodeBlock::KayahLi => families.push("Noto Sans Kayah Li"),
            UnicodeBlock::Kharoshthi => families.push("Noto Sans Kharoshthi"),
            UnicodeBlock::Khmer | UnicodeBlock::KhmerSymbols => families.push("Noto Sans Khmer"),
            UnicodeBlock::Khojki => families.push("Noto Sans Khojki"),
            UnicodeBlock::Khudawadi => families.push("Noto Sans Khudawadi"),
            UnicodeBlock::Lao => families.push("Noto Sans Lao"),
            UnicodeBlock::Lepcha => families.push("Noto Sans Lepcha"),
            UnicodeBlock::Limbu => families.push("Noto Sans Limbu"),
            UnicodeBlock::LinearA => families.push("Noto Sans Linear A"),
            UnicodeBlock::LinearBIdeograms | UnicodeBlock::LinearBSyllabary => {
                families.push("Noto Sans Linear B")
            },
            UnicodeBlock::Lisu => families.push("Noto Sans Lisu"),
            UnicodeBlock::Lycian => families.push("Noto Sans Lycian"),
            UnicodeBlock::Lydian => families.push("Noto Sans Lydian"),
            UnicodeBlock::Mahajani => families.push("Noto Sans Mahajani"),
            UnicodeBlock::Malayalam => families.push("Noto Sans Malayalam"),
            UnicodeBlock::Mandaic => families.push("Noto Sans Mandaic"),
            UnicodeBlock::Manichaean => families.push("Noto Sans Manichaean"),
            UnicodeBlock::Marchen => families.push("Noto Sans Marchen"),
            UnicodeBlock::MeeteiMayek | UnicodeBlock::MeeteiMayekExtensions => {
                families.push("Noto Sans Meetei Mayek")
            },
            UnicodeBlock::MendeKikakui => families.push("Noto Sans Mende Kikakui"),
            UnicodeBlock::MeroiticCursive | UnicodeBlock::MeroiticHieroglyphs => {
                families.push("Noto Sans Meroitic")
            },
            UnicodeBlock::Miao => families.push("Noto Sans Miao"),
            UnicodeBlock::Modi => families.push("Noto Sans Modi"),
            UnicodeBlock::Mongolian | UnicodeBlock::MongolianSupplement => {
                families.push("Noto Sans Mongolian")
            },
            UnicodeBlock::Mro => families.push("Noto Sans Mro"),
            UnicodeBlock::Multani => families.push("Noto Sans Multani"),
            UnicodeBlock::MusicalSymbols => families.push("Noto Music"),
            UnicodeBlock::Myanmar |
            UnicodeBlock::MyanmarExtendedA |
            UnicodeBlock::MyanmarExtendedB => families.push("Noto Sans Myanmar"),
            UnicodeBlock::NKo => families.push("Noto Sans NKo"),
            UnicodeBlock::Nabataean => families.push("Noto Sans Nabataean"),
            UnicodeBlock::NewTaiLue => families.push("Noto Sans New Tai Lue"),
            UnicodeBlock::Newa => families.push("Noto Sans Newa"),
            UnicodeBlock::Ogham => families.push("Noto Sans Ogham"),
            UnicodeBlock::OlChiki => families.push("Noto Sans Ol Chiki"),
            UnicodeBlock::OldHungarian => families.push("Noto Sans Old Hungarian"),
            UnicodeBlock::OldItalic => families.push("Noto Sans Old Italic"),
            UnicodeBlock::OldNorthArabian => families.push("Noto Sans Old North Arabian"),
            UnicodeBlock::OldPermic => families.push("Noto Sans Old Permic"),
            UnicodeBlock::OldPersian => families.push("Noto Sans Old Persian"),
            UnicodeBlock::OldSouthArabian => families.push("Noto Sans Old South Arabian"),
            UnicodeBlock::OldTurkic => families.push("Noto Sans Old Turkic"),
            UnicodeBlock::Oriya => families.push("Noto Sans Oriya"),
            UnicodeBlock::Osage => families.push("Noto Sans Osage"),
            UnicodeBlock::Osmanya => families.push("Noto Sans Osmanya"),
            UnicodeBlock::PahawhHmong => families.push("Noto Sans Pahawh Hmong"),
            UnicodeBlock::Palmyrene => families.push("Noto Sans Palmyrene"),
            UnicodeBlock::PauCinHau => families.push("Noto Sans Pau Cin Hau"),
            UnicodeBlock::Phagspa => families.push("Noto Sans PhagsPa"),
            UnicodeBlock::Phoenician => families.push("Noto Sans Phoenician"),
            UnicodeBlock::PsalterPahlavi => families.push("Noto Sans Psalter Pahlavi"),
            UnicodeBlock::Rejang => families.push("Noto Sans Rejang"),
            UnicodeBlock::Runic => families.push("Noto Sans Runic"),
            UnicodeBlock::Samaritan => families.push("Noto Sans Samaritan"),
            UnicodeBlock::Saurashtra => families.push("Noto Sans Saurashtra"),
            UnicodeBlock::Sharada => families.push("Noto Sans Sharada"),
            UnicodeBlock::Shavian => families.push("Noto Sans Shavian"),
            UnicodeBlock::Siddham => families.push("Noto Sans Siddham"),
            UnicodeBlock::Sinhala | UnicodeBlock::SinhalaArchaicNumbers => {
                families.push("Noto Sans Sinhala")
            },
            UnicodeBlock::SoraSompeng => families.push("Noto Sans Sora Sompeng"),
            UnicodeBlock::Sundanese => families.push("Noto Sans Sundanese"),
            UnicodeBlock::SuttonSignWriting => families.push("Noto Sans SignWrit"),
            UnicodeBlock::SylotiNagri => families.push("Noto Sans Syloti Nagri"),
            UnicodeBlock::Syriac => families.push("Noto Sans Syriac"),
            UnicodeBlock::Tagalog => families.push("Noto Sans Tagalog"),
            UnicodeBlock::Tagbanwa => families.push("Noto Sans Tagbanwa"),
            UnicodeBlock::TaiLe => families.push("Noto Sans Tai Le"),
            UnicodeBlock::TaiTham => families.push("Noto Sans Tai Tham"),
            UnicodeBlock::TaiViet => families.push("Noto Sans Tai Viet"),
            UnicodeBlock::Takri => families.push("Noto Sans Takri"),
            UnicodeBlock::Tamil => families.push("Noto Sans Tamil"),
            UnicodeBlock::Tangut |
            UnicodeBlock::TangutComponents |
            UnicodeBlock::IdeographicSymbolsandPunctuation => families.push("Noto Serif Tangut"),
            UnicodeBlock::Telugu => families.push("Noto Sans Telugu"),
            UnicodeBlock::Thaana => {
                families.push("Noto Sans Thaana");
            },
            UnicodeBlock::Thai => families.push("Noto Sans Thai"),
            UnicodeBlock::Tibetan => families.push("Noto Serif Tibetan"),
            UnicodeBlock::Tifinagh => families.push("Noto Sans Tifinagh"),
            UnicodeBlock::Tirhuta => families.push("Noto Sans Tirhuta"),
            UnicodeBlock::Ugaritic => families.push("Noto Sans Ugaritic"),
            UnicodeBlock::UnifiedCanadianAboriginalSyllabics |
            UnicodeBlock::UnifiedCanadianAboriginalSyllabicsExtended => {
                families.push("Noto Sans Canadian Aboriginal")
            },
            UnicodeBlock::Vai => families.push("Noto Sans Vai"),
            UnicodeBlock::WarangCiti => families.push("Noto Sans Warang Citi"),
            UnicodeBlock::YiSyllables | UnicodeBlock::YiRadicals => {
                families.push("Noto Sans Yi");
            },
            UnicodeBlock::Wancho => families.push("Noto Sans Wancho"),
            _ => {},
        }
    }

    families.push("Noto Sans Symbols");
    families.push("Noto Sans Symbols2");
}