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/*
 * SPDX-License-Identifier: MIT
 */
use std::io::{Seek, Write};

use pipewire_wrapper_proc_macro::object_type_impl;

use crate::enum_wrapper;
use crate::spa::pod::choice::PodChoiceRef;
use crate::spa::pod::id::{PodIdRef, PodIdType};
use crate::spa::pod::object::{PodPropKeyType, PodPropRef};
use crate::spa::pod::{BasicTypePod, PodError, PodIntRef, PodResult};
use crate::wrapper::RawWrapper;

#[repr(u32)]
#[derive(Debug)]
#[object_type_impl(OBJECT_PARAM_META)]
pub enum ParamMetaType<'a> {
    TYPE(&'a PodIdRef<MetaType>) = ParamMeta::TYPE.raw,
    SIZE(&'a PodChoiceRef<PodIntRef>) = ParamMeta::SIZE.raw,
}

impl<'a> TryFrom<&'a PodPropRef<'a, ParamMetaType<'a>>> for ParamMetaType<'a> {
    type Error = PodError;

    fn try_from(value: &'a PodPropRef<'a, ParamMetaType<'a>>) -> Result<Self, Self::Error> {
        unsafe {
            match ParamMeta::from_raw(value.raw.key) {
                ParamMeta::TYPE => Ok(ParamMetaType::TYPE(value.pod().cast()?)),
                ParamMeta::SIZE => Ok(ParamMetaType::SIZE(value.pod().cast()?)),
                _ => Err(PodError::UnknownPodTypeToDowncast),
            }
        }
    }
}

impl<'a> PodPropKeyType<'a> for ParamMetaType<'a> {
    fn write_prop<W>(&self, buffer: &mut W) -> PodResult<()>
    where
        W: Write + Seek,
    {
        match self {
            ParamMetaType::TYPE(pod) => Self::write_pod_prop(buffer, ParamMeta::TYPE.raw, 0, pod),
            ParamMetaType::SIZE(pod) => Self::write_pod_prop(buffer, ParamMeta::SIZE.raw, 0, pod),
        }
    }
}

enum_wrapper!(
    ParamMeta,
    spa_sys::spa_param_meta,
    _START: spa_sys::SPA_PARAM_META_START,
    TYPE: spa_sys::SPA_PARAM_META_type,
    SIZE: spa_sys::SPA_PARAM_META_size,
);

enum_wrapper!(
    MetaType,
    spa_sys::spa_meta_type,
    INVALID: spa_sys::SPA_META_Invalid,
    HEADER: spa_sys::SPA_META_Header,
    VIDEO_CROP: spa_sys::SPA_META_VideoCrop,
    VIDEO_DAMAGE: spa_sys::SPA_META_VideoDamage,
    BITMAP: spa_sys::SPA_META_Bitmap,
    CURSOR: spa_sys::SPA_META_Cursor,
    CONTROL: spa_sys::SPA_META_Control,
    BUSY: spa_sys::SPA_META_Busy,
);
impl PodIdType for MetaType {}