#![cfg_attr(not(feature = "std"), allow(unused_imports))]
#[macro_use]
pub mod vectorization;
pub mod backward_references;
pub mod bit_cost;
pub mod block_split;
pub mod brotli_bit_stream;
pub mod cluster;
pub mod combined_alloc;
pub mod command;
pub mod constants;
pub mod dictionary_hash;
pub mod entropy_encode;
pub mod fast_log;
pub mod histogram;
pub mod input_pair;
pub mod literal_cost;
pub mod static_dict;
pub mod static_dict_lut;
pub mod utf8_util;
pub mod util;
pub use self::backward_references::hash_to_binary_tree;
pub use self::backward_references::hq as backward_references_hq;
pub mod block_splitter;
pub mod compress_fragment;
pub mod compress_fragment_two_pass;
pub mod context_map_entropy;
pub mod encode;
pub mod find_stride;
pub mod interface;
pub mod ir_interpret;
pub mod metablock;
pub mod pdf;
pub mod prior_eval;
pub mod reader;
pub mod stride_eval;
pub mod writer;
pub use self::combined_alloc::{BrotliAlloc, CombiningAllocator};
mod compat;
pub mod fixed_queue;
pub mod multithreading;
pub mod singlethreading;
pub mod threading;
pub mod worker_pool;
#[cfg(feature = "simd")]
pub type s16 = core::simd::i16x16;
#[cfg(feature = "simd")]
pub type v8 = core::simd::f32x8;
#[cfg(feature = "simd")]
pub type s8 = core::simd::i32x8;
#[cfg(not(feature = "simd"))]
pub type s16 = compat::Compat16x16;
#[cfg(not(feature = "simd"))]
pub type v8 = compat::CompatF8;
#[cfg(not(feature = "simd"))]
pub type s8 = compat::Compat32x8;

mod parameters;
mod test;
mod weights;
pub use self::backward_references::{BrotliEncoderParams, UnionHasher};
use self::encode::{BrotliEncoderDestroyInstance, BrotliEncoderOperation};
pub use self::encode::{
    BrotliEncoderInitParams, BrotliEncoderMaxCompressedSize, BrotliEncoderMaxCompressedSizeMulti,
};
pub use self::hash_to_binary_tree::ZopfliNode;
pub use self::interface::StaticCommand;
pub use self::pdf::PDF;
pub use self::util::floatX;
pub use self::vectorization::{v256, v256i, Mem256f};
use brotli_decompressor::{CustomRead, CustomWrite};
pub use interface::{InputPair, InputReference, InputReferenceMut};

pub use alloc::{AllocatedStackMemory, Allocator, SliceWrapper, SliceWrapperMut, StackAllocator};
#[cfg(feature = "std")]
pub use alloc_stdlib::StandardAlloc;
#[cfg(feature = "std")]
use std::io;
#[cfg(feature = "std")]
use std::io::{Error, ErrorKind, Read, Write};

#[cfg(feature = "std")]
pub use brotli_decompressor::{IntoIoReader, IoReaderWrapper, IoWriterWrapper};
use enc::encode::BrotliEncoderStateStruct;

#[cfg(not(feature = "std"))]
pub use self::singlethreading::{compress_worker_pool, new_work_pool, WorkerPool};
pub use self::threading::{
    BatchSpawnableLite, BrotliEncoderThreadError, CompressionThreadResult, Owned, SendAlloc,
};
#[cfg(feature = "std")]
pub use self::worker_pool::{compress_worker_pool, new_work_pool, WorkerPool};
#[cfg(feature = "std")]
pub fn compress_multi<
    Alloc: BrotliAlloc + Send + 'static,
    SliceW: SliceWrapper<u8> + Send + 'static + Sync,
>(
    params: &BrotliEncoderParams,
    owned_input: &mut Owned<SliceW>,
    output: &mut [u8],
    alloc_per_thread: &mut [SendAlloc<
        CompressionThreadResult<Alloc>,
        backward_references::UnionHasher<Alloc>,
        Alloc,
        <WorkerPool<
            CompressionThreadResult<Alloc>,
            backward_references::UnionHasher<Alloc>,
            Alloc,
            (SliceW, BrotliEncoderParams),
        > as BatchSpawnableLite<
            CompressionThreadResult<Alloc>,
            backward_references::UnionHasher<Alloc>,
            Alloc,
            (SliceW, BrotliEncoderParams),
        >>::JoinHandle,
    >],
) -> Result<usize, BrotliEncoderThreadError>
where
    <Alloc as Allocator<u8>>::AllocatedMemory: Send,
    <Alloc as Allocator<u16>>::AllocatedMemory: Send + Sync,
    <Alloc as Allocator<u32>>::AllocatedMemory: Send + Sync,
{
    let mut work_pool = self::worker_pool::new_work_pool(alloc_per_thread.len() - 1);
    compress_worker_pool(
        params,
        owned_input,
        output,
        alloc_per_thread,
        &mut work_pool,
    )
}

#[cfg(feature = "std")]
pub use self::multithreading::compress_multi as compress_multi_no_threadpool;
#[cfg(not(feature = "std"))]
pub use self::singlethreading::compress_multi;
#[cfg(not(feature = "std"))]
pub use self::singlethreading::compress_multi as compress_multi_no_threadpool;

#[cfg(feature = "std")]
pub fn BrotliCompress<InputType, OutputType>(
    r: &mut InputType,
    w: &mut OutputType,
    params: &BrotliEncoderParams,
) -> Result<usize, io::Error>
where
    InputType: Read,
    OutputType: Write,
{
    let mut input_buffer: [u8; 4096] = [0; 4096];
    let mut output_buffer: [u8; 4096] = [0; 4096];
    BrotliCompressCustomAlloc(
        r,
        w,
        &mut input_buffer[..],
        &mut output_buffer[..],
        params,
        StandardAlloc::default(),
    )
}

#[cfg(feature = "std")]
pub fn BrotliCompressCustomAlloc<InputType, OutputType, Alloc: BrotliAlloc>(
    r: &mut InputType,
    w: &mut OutputType,
    input_buffer: &mut [u8],
    output_buffer: &mut [u8],
    params: &BrotliEncoderParams,
    alloc: Alloc,
) -> Result<usize, io::Error>
where
    InputType: Read,
    OutputType: Write,
{
    let mut nop_callback = |_data: &mut interface::PredictionModeContextMap<InputReferenceMut>,
                            _cmds: &mut [interface::StaticCommand],
                            _mb: interface::InputPair,
                            _m: &mut Alloc| ();
    BrotliCompressCustomIo(
        &mut IoReaderWrapper::<InputType>(r),
        &mut IoWriterWrapper::<OutputType>(w),
        input_buffer,
        output_buffer,
        params,
        alloc,
        &mut nop_callback,
        Error::new(ErrorKind::UnexpectedEof, "Unexpected EOF"),
    )
}

pub fn BrotliCompressCustomIo<
    ErrType,
    InputType,
    OutputType,
    Alloc: BrotliAlloc,
    MetablockCallback: FnMut(
        &mut interface::PredictionModeContextMap<InputReferenceMut>,
        &mut [interface::StaticCommand],
        interface::InputPair,
        &mut Alloc,
    ),
>(
    r: &mut InputType,
    w: &mut OutputType,
    input_buffer: &mut [u8],
    output_buffer: &mut [u8],
    params: &BrotliEncoderParams,
    alloc: Alloc,
    metablock_callback: &mut MetablockCallback,
    unexpected_eof_error_constant: ErrType,
) -> Result<usize, ErrType>
where
    InputType: CustomRead<ErrType>,
    OutputType: CustomWrite<ErrType>,
{
    BrotliCompressCustomIoCustomDict(
        r,
        w,
        input_buffer,
        output_buffer,
        params,
        alloc,
        metablock_callback,
        &[],
        unexpected_eof_error_constant,
    )
}
pub fn BrotliCompressCustomIoCustomDict<
    ErrType,
    InputType,
    OutputType,
    Alloc: BrotliAlloc,
    MetablockCallback: FnMut(
        &mut interface::PredictionModeContextMap<InputReferenceMut>,
        &mut [interface::StaticCommand],
        interface::InputPair,
        &mut Alloc,
    ),
>(
    r: &mut InputType,
    w: &mut OutputType,
    input_buffer: &mut [u8],
    output_buffer: &mut [u8],
    params: &BrotliEncoderParams,
    alloc: Alloc,
    metablock_callback: &mut MetablockCallback,
    dict: &[u8],
    unexpected_eof_error_constant: ErrType,
) -> Result<usize, ErrType>
where
    InputType: CustomRead<ErrType>,
    OutputType: CustomWrite<ErrType>,
{
    assert!(!input_buffer.is_empty());
    assert!(!output_buffer.is_empty());
    let mut s_orig = BrotliEncoderStateStruct::new(alloc);
    s_orig.params = params.clone();
    if !dict.is_empty() {
        s_orig.set_custom_dictionary(dict.len(), dict);
    }
    let mut next_in_offset: usize = 0;
    let mut next_out_offset: usize = 0;
    let mut total_out = Some(0);
    let mut read_err: Result<(), ErrType> = Ok(());
    {
        let s = &mut s_orig;

        //BrotliEncoderSetParameter(s, BrotliEncoderParameter::BROTLI_PARAM_MODE, 0 as u32); // gen, text, font
        //BrotliEncoderSetParameter(s,
        //                          BrotliEncoderParameter::BROTLI_PARAM_SIZE_HINT,
        //                          input.len() as u32);
        let mut available_in: usize = 0;
        let mut available_out: usize = output_buffer.len();
        let mut eof = false;
        loop {
            if available_in == 0 && !eof {
                next_in_offset = 0;
                match r.read(input_buffer) {
                    Err(e) => {
                        read_err = Err(e);
                        available_in = 0;
                        eof = true;
                    }
                    Ok(size) => {
                        if size == 0 {
                            eof = true;
                        }
                        available_in = size;
                    }
                }
            }
            let op: BrotliEncoderOperation;
            if available_in == 0 {
                op = BrotliEncoderOperation::BROTLI_OPERATION_FINISH;
            } else {
                op = BrotliEncoderOperation::BROTLI_OPERATION_PROCESS;
            }
            let result = s.compress_stream(
                op,
                &mut available_in,
                input_buffer,
                &mut next_in_offset,
                &mut available_out,
                output_buffer,
                &mut next_out_offset,
                &mut total_out,
                metablock_callback,
            );
            let fin = s.is_finished();
            if available_out == 0 || fin {
                let lim = output_buffer.len() - available_out;
                assert_eq!(next_out_offset, lim);
                next_out_offset = 0;
                while next_out_offset < lim {
                    match w.write(&mut output_buffer[next_out_offset..lim]) {
                        Err(e) => {
                            BrotliEncoderDestroyInstance(s);
                            read_err?;
                            return Err(e);
                        }
                        Ok(size) => {
                            next_out_offset += size;
                        }
                    }
                }
                available_out = output_buffer.len();
                next_out_offset = 0;
            }
            if !result {
                if read_err.is_ok() {
                    read_err = Err(unexpected_eof_error_constant);
                }
                break;
            }
            if fin {
                break;
            }
        }
        BrotliEncoderDestroyInstance(s);
    }
    read_err?;
    Ok(total_out.unwrap())
}
