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/*
 * SPDX-License-Identifier: MIT
 */
use std::collections::HashMap;
use std::ffi::CString;
use std::{ffi::CStr, fmt::Debug};

use bitflags::bitflags;

use pipewire_wrapper_proc_macro::RawWrapper;

use crate::spa::pod::pod_buf::AllocPod;
use crate::spa::pod::ToOwnedPod;
use crate::{
    enum_wrapper,
    spa::{dict::DictRef, pod::PodRef},
    wrapper::RawWrapper,
};

#[derive(RawWrapper)]
#[repr(transparent)]
pub struct LinkInfoRef {
    #[raw]
    raw: pw_sys::pw_link_info,
}

bitflags! {
    #[derive(Debug, PartialEq, Eq, Clone, Copy)]
    #[repr(transparent)]
    pub struct ChangeMask: u64 {
        const STATE = pw_sys::PW_LINK_CHANGE_MASK_STATE as u64;
        const FORMAT = pw_sys::PW_LINK_CHANGE_MASK_FORMAT as u64;
        const PROPS = pw_sys::PW_LINK_CHANGE_MASK_PROPS as u64;
        const ALL = pw_sys::PW_LINK_CHANGE_MASK_ALL as u64;
    }
}

enum_wrapper!(
    LinkState,
    pw_sys::pw_link_state,
    ERROR: pw_sys::pw_link_state_PW_LINK_STATE_ERROR,
    UNLINKED: pw_sys::pw_link_state_PW_LINK_STATE_UNLINKED,
    INIT: pw_sys::pw_link_state_PW_LINK_STATE_INIT,
    NEGOTIATING: pw_sys::pw_link_state_PW_LINK_STATE_NEGOTIATING,
    ALLOCATING: pw_sys::pw_link_state_PW_LINK_STATE_ALLOCATING,
    PAUSED: pw_sys::pw_link_state_PW_LINK_STATE_PAUSED,
    ACTIVE: pw_sys::pw_link_state_PW_LINK_STATE_ACTIVE,
);

impl LinkInfoRef {
    pub fn id(&self) -> u32 {
        self.raw.id
    }

    pub fn output_node_id(&self) -> u32 {
        self.raw.output_node_id
    }

    pub fn output_port_id(&self) -> u32 {
        self.raw.output_port_id
    }

    pub fn input_node_id(&self) -> u32 {
        self.raw.input_node_id
    }

    pub fn input_port_id(&self) -> u32 {
        self.raw.input_port_id
    }

    pub fn change_mask(&self) -> ChangeMask {
        ChangeMask::from_bits_retain(self.raw.change_mask)
    }

    pub fn state(&self) -> LinkState {
        LinkState::from_raw(self.raw.state)
    }

    pub fn error(&self) -> Option<&CStr> {
        unsafe { self.raw.error.as_ref().map(|s| CStr::from_ptr(s)) }
    }

    pub fn format(&self) -> &PodRef {
        unsafe { PodRef::from_raw_ptr(self.raw.format) }
    }

    pub fn props(&self) -> &DictRef {
        unsafe { DictRef::from_raw_ptr(self.raw.props) }
    }
}

impl Debug for LinkInfoRef {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("LinkInfoRef")
            .field("id", &self.raw.id)
            .field("output_node_id", &self.raw.output_node_id)
            .field("output_port_id", &self.raw.output_port_id)
            .field("input_node_id", &self.raw.input_node_id)
            .field("input_port_id", &self.raw.input_port_id)
            .field("change_mask", &self.raw.change_mask)
            .field("state", &self.raw.state)
            .field("error", &self.raw.error)
            .field("format", &self.raw.format)
            .field("props", &self.raw.props)
            .finish()
    }
}

#[derive(Clone, Debug)]
pub struct LinkInfo {
    id: u32,
    output_node_id: u32,
    output_port_id: u32,
    input_node_id: u32,
    input_port_id: u32,
    change_mask: ChangeMask,
    state: LinkState,
    error: Option<CString>,
    format: AllocPod<PodRef>,
    props: HashMap<CString, CString>,
}

impl LinkInfo {
    pub fn from_ref(ref_: &LinkInfoRef) -> Self {
        Self {
            id: ref_.id(),
            output_node_id: ref_.output_node_id(),
            output_port_id: ref_.output_port_id(),
            input_node_id: ref_.input_node_id(),
            input_port_id: ref_.input_port_id(),
            change_mask: ref_.change_mask(),
            state: ref_.state(),
            error: ref_.error().map(CString::from),
            format: ref_.format().to_owned_pod().unwrap(),
            props: ref_.props().into(),
        }
    }

    pub fn id(&self) -> u32 {
        self.id
    }
    pub fn output_node_id(&self) -> u32 {
        self.output_node_id
    }
    pub fn output_port_id(&self) -> u32 {
        self.output_port_id
    }
    pub fn input_node_id(&self) -> u32 {
        self.input_node_id
    }
    pub fn input_port_id(&self) -> u32 {
        self.input_port_id
    }
    pub fn change_mask(&self) -> ChangeMask {
        self.change_mask
    }
    pub fn state(&self) -> LinkState {
        self.state
    }
    pub fn error(&self) -> &Option<CString> {
        &self.error
    }
    pub fn format(&self) -> &AllocPod<PodRef> {
        &self.format
    }
    pub fn props(&self) -> &HashMap<CString, CString> {
        &self.props
    }
}

impl From<&LinkInfoRef> for LinkInfo {
    fn from(value: &LinkInfoRef) -> Self {
        LinkInfo::from_ref(value)
    }
}