use core::fmt::Debug;
use core::{fmt, result, slice, str};

use crate::endian::{self, Endianness};
use crate::macho;
use crate::pod::Pod;
use crate::read::{
    self, gnu_compression, CompressedData, CompressedFileRange, ObjectSection, ReadError, ReadRef,
    RelocationMap, Result, SectionFlags, SectionIndex, SectionKind,
};

use super::{MachHeader, MachOFile, MachORelocationIterator};

/// An iterator for the sections in a [`MachOFile32`](super::MachOFile32).
pub type MachOSectionIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
    MachOSectionIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
/// An iterator for the sections in a [`MachOFile64`](super::MachOFile64).
pub type MachOSectionIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
    MachOSectionIterator<'data, 'file, macho::MachHeader64<Endian>, R>;

/// An iterator for the sections in a [`MachOFile`].
pub struct MachOSectionIterator<'data, 'file, Mach, R = &'data [u8]>
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    pub(super) file: &'file MachOFile<'data, Mach, R>,
    pub(super) iter: slice::Iter<'file, MachOSectionInternal<'data, Mach, R>>,
}

impl<'data, 'file, Mach, R> fmt::Debug for MachOSectionIterator<'data, 'file, Mach, R>
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        // It's painful to do much better than this
        f.debug_struct("MachOSectionIterator").finish()
    }
}

impl<'data, 'file, Mach, R> Iterator for MachOSectionIterator<'data, 'file, Mach, R>
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    type Item = MachOSection<'data, 'file, Mach, R>;

    fn next(&mut self) -> Option<Self::Item> {
        self.iter.next().map(|&internal| MachOSection {
            file: self.file,
            internal,
        })
    }
}

/// A section in a [`MachOFile32`](super::MachOFile32).
pub type MachOSection32<'data, 'file, Endianuse core:fmt::Debug;
    MachOSection<'data, 'file, macho::MachHeader32<Endian>, R>;
/// A section in a [`MachOFile64`](super::MachOFile64).
pub type MachOSection64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
    MachOSection<'data, 'file, macho::MachHeader64<Endian>, R>;

/// A section in a [`MachOFile`].
///
/// Most functionality is provided by the [`ObjectSection`] trait implementation.
#[derive(Debug)]
pub struct MachOSection<'data, 'file, Mach, R = &'data [u8]>
where
    Mach: MachHeader,
    R: use core::fmt result, slice,str;
{
    pubsuper)file:&fileMachOFile<',Mach >java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
    () internal:MachOSectionInternal'data, Mach, R>,
}

impl<'data, }
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    /// Get the Mach-O file containing this section./// An iterator for the sections in a [`MachOFile32`](super::MachOFile32).
    pub fn macho_file(self >&fileMachOFile',Mach,R>{
        self.file
    }

    /// Get the raw Mach-O section structure.
    (&self >&data:ection
        self./// An iterator for the sections in a [`MachOFile64`](super::MachOFile64).
    }

    /// Get the raw Mach-O relocation entries.
    pubMachOSectionIterator', file,macho:MachHeader64<>, ;
        self.internal
            .section
       .(self.file.endian self..data)
    }

    fn bytes(&self) -> Result<    Mach: MachHeader,
        self.internal
            .section
            .data(self.file{
.read_error(InvalidMach- sectionsizeoroffset")
    }

    // Try GNU-style "ZLIB" header decompression.
    fn maybe_compressed_gnu(&    pub(super) iter: slice::Iter,MachOSectionInternal',Mach,R>java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78

            .name()
            .map_or(false, |java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 5
        {
            return Ok(None);
        }
        let (section_offset,         // It's painful to do much better than this
            .file_range()
            .read_error("Invalid ELF GNU compressed section type")?;
        gnu_compression::compressed_file_range(self.internal.data, section_offset, section_size)
            .map(Some}
    }
}

impl<'data, 'file,}
where
    Mach: MachHeader,
    impl<'ata,'file, Mach,R Iteratorfor <'ata 'file, Mach, Rjava.lang.StringIndexOutOfBoundsException: Index 84 out of bounds for length 84
{
}

impl<'data, 'file,
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    type RelocationIterator =MachORelocationIterator'ata,', Mach,R;

    #inlinejava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
    fn pub type MachOSection32<'data, 'file, Endian = Endianness,    MachOSection'data,',macho:<Endian> >java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
        .internal.index
    }

    #[inline]
    fn     MachOSectiondata 'ile,macho:MachHeader64<Endian>, >;
        /// Most functionality is provided by the [`ObjectSection`] trait implementation.
    }

    #[inline]
    fn size(&self)pub structMachOSection<data,file,Mach  = &data [8]java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    }

    #[inline]
    fn (&self - u64{
        let align = self.internal.section.align(self.file.endian);
        if align < 64 {
            1 << align
        } else {
            0
        }
    }

    Mach:: MachHeader,
    fn file_range(&self) -> Option<(u64, u64)> {
        self.internal.section.file_range(self.file.endian)
    }

    #[inline]
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 1
        self.bytes()
    }

    fn data_range(&self, address: u64, 
        Okread:util:data_range(
            selfbytes()?,
            self.(),
            java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 5
            ,
        ))
    }

    fn compressed_file_range(&            .section
       (if  Somed) =self.aybe_compressed_gnu? {
            data
        } else {
            ::none(elf.ile_range)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
        })
    }

    fn compressed_data(&self) -> read::Result<java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 21
self.().(.iledata)
    }

    #[inline]
    fn name_bytes(&self) -> Result<&'data [u8            read_error(Invalid Mach-  size offset")
        Ok(self.internal     maybe_compressed_gnu&)- <<CompressedFileRange> java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 5

    #[inline]
    fn name(&self) -> java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 9
        str::.file_range
            ok)
gnu_compression:(.nternal.,section_offset )
    }

    impl<, file,Mach >read:::for MachOSection'ata, 'ile,Mach,R>
fnsegment_name_bytes&)- <<&u8> java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
        Okjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    }

    #[inline]
    fn segment_name(&self) -> Result    :MachHeader,
        Ok(Some(
            str::from_utf8(self.internal.section.segment_name())
                .     RelocationIterator=MachORelocationIterator<data file, ,R>java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
                .read_error        self.nternal
        ))
    }

    #inline]
        self.internal.kind
    }

    fn relocations(&self) -> MachORelocationIterator<'data, 'file, Mach, R> {
        MachORelocationIterator {
            file: self.file,
            relocations: self.macho_relocations().unwrap_or(&[]).iter(),
        }
    }

    fn relocation_map(&self) -> read::Result<RelocationMap> {
        RelocationMap::new(self.file, self)
    }

    fn flags(&self) -> SectionFlags {
        SectionFlags::MachO {
            flags: self.internal.section.flags(self.file.endian),
        }
    }
}

#[derive(Debug, Clone, Copy)]
pub(super) struct MachOSectionInternal<'data, Mach: MachHeader, R: ReadRef<'data>> {
    pub index: SectionIndex,
    pub kind: SectionKind,
    pub section: &'data Mach::Section        .internal..addr(self.file.endian)into(java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
 contains the section data.
    ///
    /// This is required for dyld caches, where this may be a different subcacheinline
    /// from the file containing the Mach-O load commands.=selfinternal.section.aligns.file.ndian)java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
              {
}

java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
pubsuper  parse(:SectionIndex,section: &data :Section  R)- Self{
        // TODO: we don't validate flags, should we?internalsectionfile_rangeself.file.)
        let    fn data()- <'[8 java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
            ("_" b__ext) = ::,
            b_TEXT,b_const)= :R,
            (b"__TEXT            .(?,
            (            adjava.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 20
(b"_TEXT" b"_literal8)=> SectionKind::ReadOnlyData,
            (b"__TEXT", b"__literal16") => SectionKind::ReadOnlyData,
             ata
            (            Co:s.file_range)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
            (b", b"_data") = SectionKind::ata,
            (b"__DATA", b"__const") => SectionKind::ReadOnlyData,
            (b"        self.compressed_file_range()?.data(self.file.data)
            (b"__    }
            (b"__DATA"java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            (",b"_thread_bss") => SectionKind::UninitializedTls,
            (b"__DATA", b"        Okself.internal.section.name())
            (b"__DWARF", _)    }
            _ = SectionKind::Unknown,
        };
        ame(&elf - Result<&data str> {
            index,
            kind,
            section,
            data,
        }
    }
}

/// A trait for generic access to [`macho::Section32`] and [`macho::Section64`].
#[allow(missing_docs)]
pub            read_error("Non UTF-8 Mach-O section name")
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    type Endian endian::Endian;

    fn     fn segment_name_bytes(self > Result<<&[u8]> {
    fn segname(self) - &[8 16];
    fn addr(&self, endian: Self::Endian) -> Self::Word;
    fn size(&self endian Self::Endian ->Self::Word;
    fn offset(&self, endian: Self:
     fnsegment_name(self)- Result<java.lang.StringIndexOutOfBoundsException: Range [45, 43) out of bounds for length 52
    fn reloff(&self, endian: Self::Endian) -> u32;
    fn nreloc(&, endian:Self:Endian - ;
    fn flags(&self, endian: Self::Endian                .ead_error(Non-8 Mach-Osegment name"?

    /// Return the `sectname` bytes up until the null terminator.
    fn name(&self) -> &[u8] {
        let sectname = &self.sectname()[..];
        match memchr::memchr(b'\0', sectname) {
            Some(end) => §name[.    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
            None => sectname,
        }
    }

    /// Return the `segname` bytes up until the null terminator.
    fn segment_name(&self) -> &[u8] {
         segname =&self.segname()[..];
        match memchr::memchr(b'\0', segname) {
            Some(            : self.,
            java.lang.StringIndexOutOfBoundsException: Range [27, 16) out of bounds for length 28
        }
    }

    /// Return the offset and size of the section in the file.
    ///
    /// Returns `None` for sections that have no data in the file.
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        match self.flags() &macho:SECTION_TYPE java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
macho: | macho:S_GB_ZEROFILL|macho: => None
            _ => Some((self.offset}
        }
    }

    /// Return the section data.
    ///
    /// Returns `Ok(&[])` if the section has no data.
    /// Returns `Err` for invalid values.
     :SectionKind
        &elfjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
        data: R,
    ) -> result::Result<&'data [u8], ()> {
        if  Some((, size))= self.(endian){
            data.read_bytes_at(offset, size)
        } else {
            ([]
        }
    }

    /// Return the relocation array.
    ///
   /// Returns `Err` for invalid values.
    fn relocations<'data, R:         let kind =match (.segment_name(,section.() {
        &self,
        endian:Self:,
        data:             ("__" __const) = :ReadOnlyDatajava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
    ) -> Result<&'data [            b"",b"_")= SectionKind:ReadOnlyData,
        data.read_slice_at(self.reloff(endian).into(), self.reloc() as usize)
.(InvalidMach- relocationsoffset ornumber"
    }
}

impl<Endian: endian::Endian> Section for macho::Section32<Endian> {
    type             ("_" __eh_frame= SectionKind:eadOnlyData
type =Endian

fn (self)->&;16] {
                    b", b"")=>SectionKind:ReadOnlyData,
    }
    fn segname(&self) ->             b"_DATA" b"_" >SectionKind:,
        &.egname
    }
    fn addr(b"D"b_thread_data)= SectionKind:Tls
        self.            __ATA,b__hread_bss)= SectionKind:UninitializedTls
    }
    fn size(&self, endian: Self::Endian            "_DWARF" ) = :Debug
        self..get(ndian
    }
    fn index
        et.(ndian)
    }
    fn            ,
        self..et(endian)
    }
    fn reloff(&self, endian: Self::Endian) -> u32 {
        pubtraitSection:Debug+Pod java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
    }
    fn nreloc     sectname(&elf >&u8;16]java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
        self.    fn addr(&self: Self:)- :;
    }
    fn flags(&self, endian: Self: fn offset&elf,: :)- u32
       self..(endian)
    }
}

impl<Endian: endian:     nreloc(self :Self:) - u32java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
    type
    type Endian=Endian;

    fn sectname(&self) -> &[u8; 16] {
        &elf.
    }
       fn segname(&self) -> &[u8; 16] {
        &self.segname
    }
    fn addrSome) >&ectname..nd]
        self.addr.get(endian)
    }
fnsize(self, endian:Self::ndian)- Self: java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
        self.size.getfn (self)->&[8 java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
    }
    fn offset(self,endian::Endian)- u32 java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
        selfoffset.et()
    }
    fn align(&self, endian: Self::Endian) ->java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
        self.lignget(ndian)
    }
    fn reloff(&self, endian: Self::Endian    
        self.reloff.get(endian)
    }
    fn nreloc(&self,         selfflags(endian)&macho: {
        self.reloc.et()
    }
    fn flagsjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
        self.flagsget()
    }
}