use cpal::platform::{Device, Host};
use cpal::traits::{DeviceTrait, HostTrait};

use crate::audio_controllers::audio_backend::AudioBackend;
use crate::core::thread_messages::DeviceListItem;

pub struct CpalBackend;

impl AudioBackend for CpalBackend {
    fn list_devices(&mut self, host: &Host) -> Vec<DeviceListItem> {
        let mut device_names: Vec<DeviceListItem> = vec![];

        for device in host.input_devices().unwrap() {
            let device_id = device.id().unwrap().to_string();
            let device_description = device.description().unwrap().name().to_string();

            // Selecting the "upmix" or "vdownmix" input
            // source on an ALSA-based configuration may
            // crash our underlying sound library.

            #[cfg(target_os = "linux")]
            if device_id.contains("upmix") || device_id.contains("downmix") {
                continue;
            }

            device_names.push(DeviceListItem {
                inner_name: device_id.clone(),
                display_name: device_description.clone(),
                is_monitor: false,
            });
        }

        device_names
    }

    fn set_device(&mut self, host: &Host, inner_name: &str) -> Device {
        let mut device: cpal::Device = host.default_input_device().unwrap();

        for possible_device in host.input_devices().unwrap() {
            if possible_device.id().unwrap().to_string() == inner_name {
                device = possible_device;
                break;
            }
        }

        device
    }
}
