// Copyright 2017 Lyndon Brown
//
// This file is part of the PulseAudio Rust language linking library.
//
// Licensed under the MIT license or the Apache license (version 2.0), at your option. You may not
// copy, modify, or distribute this file except in compliance with said license. You can find copies
// of these licenses either in the LICENSE-MIT and LICENSE-APACHE files, or alternatively at
// <http://opensource.org/licenses/MIT> and <http://www.apache.org/licenses/LICENSE-2.0>
// respectively.
//
// Portions of documentation are copied from the LGPL 2.1+ licensed PulseAudio C headers on a
// fair-use basis, as discussed in the overall project readme (available in the git repository).

//! Audio streams for input, output and sample upload.

use std::os::raw::{c_char, c_void};
use num_derive::{FromPrimitive, ToPrimitive};
use crate::sample::{pa_sample_spec, pa_usec_t};
use crate::def::{pa_buffer_attr, pa_timing_info, pa_free_cb_t};
use crate::proplist::{pa_proplist, pa_update_mode_t};
use crate::{context::pa_context, channelmap::pa_channel_map, format::pa_format_info};
use crate::{volume::pa_cvolume, operation::pa_operation};

/// An opaque stream for playback or recording.
#[repr(C)] pub struct pa_stream { _private: [u8; 0] }

#[repr(C)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[derive(FromPrimitive, ToPrimitive)]
pub enum pa_stream_state_t {
    Unconnected,
    Creating,
    Ready,
    Failed,
    Terminated,
}

pub const PA_STREAM_UNCONNECTED: pa_stream_state_t = pa_stream_state_t::Unconnected;
pub const PA_STREAM_CREATING:    pa_stream_state_t = pa_stream_state_t::Creating;
pub const PA_STREAM_READY:       pa_stream_state_t = pa_stream_state_t::Ready;
pub const PA_STREAM_FAILED:      pa_stream_state_t = pa_stream_state_t::Failed;
pub const PA_STREAM_TERMINATED:  pa_stream_state_t = pa_stream_state_t::Terminated;

/// Checks if the passed state is one of the connected states (returns `true` if so).
#[inline(always)]
pub fn pa_stream_is_good(state: pa_stream_state_t) -> bool {
    state == pa_stream_state_t::Creating ||
    state == pa_stream_state_t::Ready
}

/// Stream direction.
#[repr(C)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[derive(FromPrimitive, ToPrimitive)]
pub enum pa_stream_direction_t {
    /// Invalid.
    Invalid,
    /// Playback.
    Playback,
    /// Record.
    Record,
    /// Upload.
    Upload,
}

pub const PA_STREAM_NODIRECTION: pa_stream_direction_t = pa_stream_direction_t::Invalid;
pub const PA_STREAM_PLAYBACK:    pa_stream_direction_t = pa_stream_direction_t::Playback;
pub const PA_STREAM_RECORD:      pa_stream_direction_t = pa_stream_direction_t::Record;
pub const PA_STREAM_UPLOAD:      pa_stream_direction_t = pa_stream_direction_t::Upload;

pub type pa_stream_flags_t = u32;

pub use self::flags::*;

/// Some special flags for stream connections.
pub mod flags {
    use super::pa_stream_flags_t;

    pub const PA_STREAM_NOFLAGS:                   pa_stream_flags_t = 0;
    pub const PA_STREAM_START_CORKED:              pa_stream_flags_t = 1 << 0;
    pub const PA_STREAM_INTERPOLATE_TIMING:        pa_stream_flags_t = 1 << 1;
    pub const PA_STREAM_NOT_MONOTONIC:             pa_stream_flags_t = 1 << 2;
    pub const PA_STREAM_AUTO_TIMING_UPDATE:        pa_stream_flags_t = 1 << 3;
    pub const PA_STREAM_NO_REMAP_CHANNELS:         pa_stream_flags_t = 1 << 4;
    pub const PA_STREAM_NO_REMIX_CHANNELS:         pa_stream_flags_t = 1 << 5;
    pub const PA_STREAM_FIX_FORMAT:                pa_stream_flags_t = 1 << 6;
    pub const PA_STREAM_FIX_RATE:                  pa_stream_flags_t = 1 << 7;
    pub const PA_STREAM_FIX_CHANNELS:              pa_stream_flags_t = 1 << 8;
    pub const PA_STREAM_DONT_MOVE:                 pa_stream_flags_t = 1 << 9;
    pub const PA_STREAM_VARIABLE_RATE:             pa_stream_flags_t = 1 << 10;
    pub const PA_STREAM_PEAK_DETECT:               pa_stream_flags_t = 1 << 11;
    pub const PA_STREAM_START_MUTED:               pa_stream_flags_t = 1 << 12;
    pub const PA_STREAM_ADJUST_LATENCY:            pa_stream_flags_t = 1 << 13;
    pub const PA_STREAM_EARLY_REQUESTS:            pa_stream_flags_t = 1 << 14;
    pub const PA_STREAM_DONT_INHIBIT_AUTO_SUSPEND: pa_stream_flags_t = 1 << 15;
    pub const PA_STREAM_START_UNMUTED:             pa_stream_flags_t = 1 << 16;
    pub const PA_STREAM_FAIL_ON_SUSPEND:           pa_stream_flags_t = 1 << 17;
    pub const PA_STREAM_RELATIVE_VOLUME:           pa_stream_flags_t = 1 << 18;
    pub const PA_STREAM_PASSTHROUGH:               pa_stream_flags_t = 1 << 19;
}

/// Seek mode.
#[repr(C)]
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[derive(FromPrimitive, ToPrimitive)]
pub enum pa_seek_mode_t {
    /// Seek relatively to the write index.
    Relative = 0,
    /// Seek relatively to the start of the buffer queue.
    Absolute = 1,
    /// Seek relatively to the read index.
    RelativeOnRead = 2,
    /// Seek relatively to the current end of the buffer queue.
    RelativeEnd = 3,
}

pub const PA_SEEK_RELATIVE:         pa_seek_mode_t = pa_seek_mode_t::Relative;
pub const PA_SEEK_ABSOLUTE:         pa_seek_mode_t = pa_seek_mode_t::Absolute;
pub const PA_SEEK_RELATIVE_ON_READ: pa_seek_mode_t = pa_seek_mode_t::RelativeOnRead;
pub const PA_SEEK_RELATIVE_END:     pa_seek_mode_t = pa_seek_mode_t::RelativeEnd;

pub const PA_STREAM_EVENT_REQUEST_CORK:   &str = "request-cork";
pub const PA_STREAM_EVENT_REQUEST_UNCORK: &str = "request-uncork";
pub const PA_STREAM_EVENT_FORMAT_LOST:    &str = "format-lost";

pub type pa_stream_success_cb_t = Option<extern "C" fn(s: *mut pa_stream, success: i32, userdata: *mut c_void)>;

pub type pa_stream_request_cb_t = Option<extern "C" fn(p: *mut pa_stream, nbytes: usize, userdata: *mut c_void)>;

pub type pa_stream_notify_cb_t = Option<extern "C" fn(p: *mut pa_stream, userdata: *mut c_void)>;

pub type pa_stream_event_cb_t = Option<extern "C" fn(p: *mut pa_stream, name: *const c_char, pl: *mut pa_proplist, userdata: *mut c_void)>;

#[link(name="pulse")]
extern "C" {
    pub fn pa_stream_connect_upload(s: *mut pa_stream, length: usize) -> i32;
    pub fn pa_stream_finish_upload(s: *mut pa_stream) -> i32;

    pub fn pa_stream_new(c: *mut pa_context, name: *const c_char, ss: *const pa_sample_spec, map: *const pa_channel_map) -> *mut pa_stream;
    pub fn pa_stream_new_with_proplist(c: *mut pa_context, name: *const c_char, ss: *const pa_sample_spec, map: *const pa_channel_map, p: *mut pa_proplist) -> *mut pa_stream;
    pub fn pa_stream_new_extended(c: *mut pa_context, name: *const c_char, formats: *const *const pa_format_info, n_formats: u32, p: *mut pa_proplist) -> *mut pa_stream;
    pub fn pa_stream_unref(s: *mut pa_stream);
    pub fn pa_stream_ref(s: *mut pa_stream) -> *mut pa_stream;
    pub fn pa_stream_get_state(s: *const pa_stream) -> pa_stream_state_t;
    pub fn pa_stream_get_context(s: *const pa_stream) -> *mut pa_context;
    pub fn pa_stream_get_index(s: *const pa_stream) -> u32;
    pub fn pa_stream_get_device_index(s: *const pa_stream) -> u32;
    pub fn pa_stream_get_device_name(s: *const pa_stream) -> *const c_char;
    pub fn pa_stream_is_suspended(s: *const pa_stream) -> i32;
    pub fn pa_stream_is_corked(s: *const pa_stream) -> i32;
    pub fn pa_stream_connect_playback(s: *mut pa_stream, dev: *const c_char, attr: *const pa_buffer_attr, flags: pa_stream_flags_t, volume: *const pa_cvolume, sync_stream: *mut pa_stream) -> i32;
    pub fn pa_stream_connect_record(s: *mut pa_stream, dev: *const c_char, attr: *const pa_buffer_attr, flags: pa_stream_flags_t) -> i32;
    pub fn pa_stream_disconnect(s: *mut pa_stream) -> i32;
    pub fn pa_stream_begin_write(s: *mut pa_stream, data: *mut *mut c_void, nbytes: *mut usize) -> i32;
    pub fn pa_stream_cancel_write(s: *mut pa_stream) -> i32;
    pub fn pa_stream_write(s: *mut pa_stream, data: *const c_void, nbytes: usize, free_cb: pa_free_cb_t, offset: i64, seek: pa_seek_mode_t) -> i32;
    #[cfg(any(doc, feature = "pa_v6"))]
    #[cfg_attr(docsrs, doc(cfg(feature = "pa_v6")))]
    pub fn pa_stream_write_ext_free(s: *mut pa_stream, data: *const c_void, nbytes: usize, free_cb: pa_free_cb_t, free_cb_data: *mut c_void, offset: i64, seek: pa_seek_mode_t) -> i32;
    pub fn pa_stream_peek(s: *mut pa_stream, data: *mut *const c_void, nbytes: *mut usize) -> i32;
    pub fn pa_stream_drop(s: *mut pa_stream) -> i32;
    pub fn pa_stream_writable_size(s: *const pa_stream) -> usize;
    pub fn pa_stream_readable_size(s: *const pa_stream) -> usize;
    pub fn pa_stream_drain(s: *mut pa_stream, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_update_timing_info(s: *mut pa_stream, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_set_state_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_write_callback(s: *mut pa_stream, cb: pa_stream_request_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_read_callback(s: *mut pa_stream, cb: pa_stream_request_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_overflow_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_get_underflow_index(s: *const pa_stream) -> i64;
    pub fn pa_stream_set_underflow_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_started_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_latency_update_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_moved_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_suspended_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_event_callback(s: *mut pa_stream, cb: pa_stream_event_cb_t, userdata: *mut c_void);
    pub fn pa_stream_set_buffer_attr_callback(s: *mut pa_stream, cb: pa_stream_notify_cb_t, userdata: *mut c_void);
    pub fn pa_stream_cork(s: *mut pa_stream, b: i32, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_flush(s: *mut pa_stream, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_prebuf(s: *mut pa_stream, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_trigger(s: *mut pa_stream, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_set_name(s: *mut pa_stream, name: *const c_char, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_get_time(s: *mut pa_stream, r_usec: *mut pa_usec_t) -> i32;
    pub fn pa_stream_get_latency(s: *mut pa_stream, r_usec: *mut pa_usec_t, negative: *mut i32) -> i32;
    pub fn pa_stream_get_timing_info(s: *mut pa_stream) -> *const pa_timing_info;
    pub fn pa_stream_get_sample_spec(s: *mut pa_stream) -> *const pa_sample_spec;
    pub fn pa_stream_get_channel_map(s: *mut pa_stream) -> *const pa_channel_map;
    pub fn pa_stream_get_format_info(s: *const pa_stream) -> *mut pa_format_info;
    pub fn pa_stream_get_buffer_attr(s: *mut pa_stream) -> *const pa_buffer_attr;
    pub fn pa_stream_set_buffer_attr(s: *mut pa_stream, attr: *const pa_buffer_attr, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_update_sample_rate(s: *mut pa_stream, rate: u32, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_proplist_update(s: *mut pa_stream, mode: pa_update_mode_t, p: *mut pa_proplist, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_proplist_remove(s: *mut pa_stream, keys: *const *const c_char, cb: pa_stream_success_cb_t, userdata: *mut c_void) -> *mut pa_operation;
    pub fn pa_stream_set_monitor_stream(s: *mut pa_stream, sink_input_idx: u32) -> i32;
    pub fn pa_stream_get_monitor_stream(s: *const pa_stream) -> u32;
}