// THIS FILE IS AUTOGENERATED.

// Any changes to this file will be overwritten.

// For more information about how codegen works, see font-codegen/README.md

#[allow(unused_imports)]

use crate::codegen_prelude::*;

impl<'a> MinByteRange<'a> for Meta<'a> {

    fn min_byte_range(&self) -> Range<usize> {

        0..self.data_maps_byte_range().end

    }

    fn min_table_bytes(&self) -> &'a [u8] {

        let range = self.min_byte_range();

        self.offset_data().as_bytes().get(range).unwrap_or_default()

    }

}

impl TopLevelTable for Meta<'_> {

    /// `meta`

    const TAG: Tag = Tag::new(b"meta");

}

impl ReadArgs for Meta<'_> {

    type Args = ();

}

impl<'a> FontRead<'a> for Meta<'a> {

    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {

        #[allow(clippy::absurd_extreme_comparisons)]

        if data.len() < Self::MIN_SIZE {

            return Err(ReadError::OutOfBounds);

        }

        let Some(data) = TableDataRef::new(data.as_bytes()) else {

            return Err(ReadError::OutOfBounds);

        };

        Ok(Self { data })

    }

}

/// The fields at the start of the table, which are read directly.

#[derive(Clone, Copy, bytemuck :: AnyBitPattern)]

#[repr(C, packed)]

#[doc(hidden)]

pub struct MetaFixedHeader {

    pub version: BigEndian<u32>,

    pub flags: BigEndian<u32>,

    pub reserved: BigEndian<u32>,

    pub data_maps_count: BigEndian<u32>,

}

#[allow(clippy::absurd_extreme_comparisons)]

const _: () = assert!(std::mem::size_of::<MetaFixedHeader>() <= Meta::MIN_SIZE);

/// [`meta`](https://docs.microsoft.com/en-us/typography/opentype/spec/meta)

#[derive(Clone)]

pub struct Meta<'a> {

    data: TableDataRef<'a, MetaFixedHeader>,

}

#[allow(clippy::needless_lifetimes)]

impl<'a> Meta<'a> {

    pub const MIN_SIZE: usize =

        (u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN);

    basic_table_impls!(impl_the_methods);

    /// Version number of the metadata table — set to 1.

    pub fn version(&self) -> u32 {

        self.data.header().version.get()

    }

    /// Flags — currently unused; set to 0.

    pub fn flags(&self) -> u32 {

        self.data.header().flags.get()

    }

    /// The number of data maps in the table.

    pub fn data_maps_count(&self) -> u32 {

        self.data.header().data_maps_count.get()

    }

    /// Array of data map records.

    pub fn data_maps(&self) -> &'a [DataMapRecord] {

        let range = self.data_maps_byte_range();

        self.offset_data()

            .read_array(range)

            .ok()

            .unwrap_or_default()

    }

    pub fn version_byte_range(&self) -> Range<usize> {

        let start = 0;

        let end = start + u32::RAW_BYTE_LEN;

        start..end

    }

    pub fn flags_byte_range(&self) -> Range<usize> {

        let start = self.version_byte_range().end;

        let end = start + u32::RAW_BYTE_LEN;

        start..end

    }

    pub fn reserved_byte_range(&self) -> Range<usize> {

        let start = self.flags_byte_range().end;

        let end = start + u32::RAW_BYTE_LEN;

        start..end

    }

    pub fn data_maps_count_byte_range(&self) -> Range<usize> {

        let start = self.reserved_byte_range().end;

        let end = start + u32::RAW_BYTE_LEN;

        start..end

    }

    pub fn data_maps_byte_range(&self) -> Range<usize> {

        let data_maps_count = self.data_maps_count();

        let start = self.data_maps_count_byte_range().end;

        let end = start

            + (transforms::to_usize(data_maps_count)).saturating_mul(DataMapRecord::RAW_BYTE_LEN);

        start..end

    }

}

const _: () = assert!(FontData::default_data_long_enough(Meta::MIN_SIZE));

impl Default for Meta<'_> {

    fn default() -> Self {

        Self {

            data: TableDataRef::new(FontData::default_table_data().as_bytes())

                .unwrap_or_else(|| unreachable!("the default data covers MIN_SIZE")),

        }

    }

}

///  <https://learn.microsoft.com/en-us/typography/opentype/spec/meta#table-formats>

#[derive(Clone, Debug, Copy, bytemuck :: AnyBitPattern)]

#[repr(C)]

#[repr(packed)]

pub struct DataMapRecord {

    /// A tag indicating the type of metadata.

    pub tag: BigEndian<Tag>,

    /// Offset in bytes from the beginning of the metadata table to the data for this tag.

    pub data_offset: BigEndian<Offset32>,

    /// Length of the data, in bytes. The data is not required to be padded to any byte boundary.

    pub data_length: BigEndian<u32>,

}

impl DataMapRecord {

    /// A tag indicating the type of metadata.

    pub fn tag(&self) -> Tag {

        self.tag.get()

    }

    /// Offset in bytes from the beginning of the metadata table to the data for this tag.

    pub fn data_offset(&self) -> Offset32 {

        self.data_offset.get()

    }

    /// Offset in bytes from the beginning of the metadata table to the data for this tag.

    ///

    /// The `data` argument should be retrieved from the parent table

    /// By calling its `offset_data` method.

    pub fn data<'a>(&self, data: FontData<'a>) -> Result<Metadata<'a>, ReadError> {

        let args = (self.tag(), self.data_length());

        self.data_offset().resolve_with_args(data, args)

    }

    /// Length of the data, in bytes. The data is not required to be padded to any byte boundary.

    pub fn data_length(&self) -> u32 {

        self.data_length.get()

    }

}

impl FixedSize for DataMapRecord {

    const RAW_BYTE_LEN: usize = Tag::RAW_BYTE_LEN + Offset32::RAW_BYTE_LEN + u32::RAW_BYTE_LEN;

}