#[macro_use]
extern crate serde_derive;

use mcai_worker_sdk::{default_rust_mcai_worker_description, prelude::*};
use std::{thread::sleep, time::Duration};

#[cfg(feature = "media")]
use std::sync::{mpsc::Sender, Arc, Mutex};

#[derive(Debug, Deserialize, JsonSchema)]
#[serde(deny_unknown_fields)]
struct WorkerParameters {
  action: Option<String>,
  #[allow(dead_code)]
  source_path: Option<String>,
  #[allow(dead_code)]
  destination_path: Option<String>,
  // Updatable parameter
  #[cfg(feature = "media")]
  updatable: Option<String>,
  /// Option sleep time in milliseconds
  ///
  /// For not media, it will sleep until a stop is received
  ///
  /// For media it will be between each frame
  sleep: Option<u64>,
}

#[derive(Debug, Default)]
struct WorkerContext {
  #[cfg(feature = "media")]
  result: Option<Arc<Mutex<Sender<ProcessResult>>>>,
  #[cfg(feature = "media")]
  updatable: Option<String>,
  #[cfg(feature = "media")]
  sleep: Option<u64>,
}

default_rust_mcai_worker_description!();

impl McaiWorker<WorkerParameters, RustMcaiWorkerDescription> for WorkerContext {
  fn init(&mut self) -> Result<()> {
    Ok(())
  }

  #[cfg(feature = "media")]
  fn init_process(
    &mut self,
    parameters: WorkerParameters,
    format_context: Arc<Mutex<FormatContext>>,
    result: Arc<Mutex<Sender<ProcessResult>>>,
  ) -> Result<Vec<StreamDescriptor>> {
    self.result = Some(result);
    self.sleep = parameters.sleep;
    self.updatable = Some("basic".to_string());

    let mut stream_descriptors = vec![];

    let format_context = format_context.lock().unwrap();
    for stream_index in 0..format_context.get_nb_streams() {
      let stream_type = format_context.get_stream_type(stream_index as isize);
      info!(
        "Handle stream #{} with type: {:?}",
        stream_index, stream_type
      );

      match stream_type {
        AVMediaType::AVMEDIA_TYPE_VIDEO => {
          let filters = vec![VideoFilter::Resize(Scaling {
            width: Some(200),
            height: Some(70),
          })];
          stream_descriptors.push(StreamDescriptor::new_video(stream_index as usize, filters))
        }
        AVMediaType::AVMEDIA_TYPE_AUDIO => {
          let channel_layouts = vec!["mono".to_string()];
          let sample_formats = vec!["s16".to_string()];
          let sample_rates = vec![16000];

          let filters = vec![AudioFilter::Format(AudioFormat {
            sample_rates,
            channel_layouts,
            sample_formats,
          })];
          stream_descriptors.push(StreamDescriptor::new_audio(stream_index as usize, filters))
        }
        AVMediaType::AVMEDIA_TYPE_SUBTITLE => {
          stream_descriptors.push(StreamDescriptor::new_data(stream_index as usize))
        }
        AVMediaType::AVMEDIA_TYPE_DATA => {
          stream_descriptors.push(StreamDescriptor::new_data(stream_index as usize))
        }
        _ => info!("Skip stream #{}", stream_index),
      };
    }
    Ok(stream_descriptors)
  }

  #[cfg(feature = "media")]
  fn process_frames(
    &mut self,
    job_result: JobResult,
    stream_index: usize,
    frames: &[ProcessFrame],
  ) -> Result<ProcessResult> {
    for decoded_frame in frames {
      match decoded_frame {
        ProcessFrame::AudioVideo(frame) => {
          unsafe {
            let width = (*frame.frame).width;
            let height = (*frame.frame).height;
            let sample_rate = (*frame.frame).sample_rate;
            let channels = (*frame.frame).channels;
            let nb_samples = (*frame.frame).nb_samples;

            if width != 0 && height != 0 {
              info!(
                target: &job_result.get_str_job_id(),
                "Stream {} - PTS: {}, image size: {}x{}",
                stream_index,
                frame.get_pts(),
                width,
                height
              );
            } else {
              info!(
                target: &job_result.get_str_job_id(),
                "Stream {} - PTS: {}, sample_rate: {}Hz, channels: {}, nb_samples: {}",
                stream_index,
                frame.get_pts(),
                sample_rate,
                channels,
                nb_samples,
              );
            }
          }
          if let Some(duration) = self.sleep {
            sleep(Duration::from_millis(duration));
          }
        }
        _ => break,
      }
    }
    Ok(ProcessResult::new_json(""))
  }

  #[cfg(feature = "media")]
  fn update_process(&mut self, parameters: WorkerParameters) -> Result<()> {
    self.updatable = parameters.updatable;
    Ok(())
  }

  #[cfg(feature = "media")]
  fn ending_process(&mut self) -> Result<()> {
    log::info!("Ending process");
    Ok(())
  }

  /// Not called when the "media" feature is enabled
  fn process(
    &self,
    channel: Option<McaiChannel>,
    parameters: WorkerParameters,
    job_result: JobResult,
  ) -> Result<JobResult> {
    if let Some(duration) = parameters.sleep {
      let total = 10_u16;
      for count in 0..total {
        if Self::is_current_job_stopped(&channel) {
          return Ok(job_result.with_status(JobStatus::Stopped));
        }
        log::debug!("sleep more ({}/{})...", count + 1, total);
        sleep(Duration::from_millis(duration));
        publish_job_progression(
          channel.clone(),
          job_result.get_job_id(),
          ((count + 1) * 100 / total) as u8,
        )?;
      }
    } else {
      publish_job_progression(channel.clone(), job_result.get_job_id(), 50)?;
    }

    match parameters.action {
      Some(action_label) => match action_label.as_str() {
        "completed" => {
          publish_job_progression(channel, job_result.get_job_id(), 100)?;
          Ok(job_result.with_status(JobStatus::Completed))
        }
        action_label => {
          let result = job_result.with_message(&format!("Unknown action named {action_label}"));
          Err(MessageError::ProcessingError(result))
        }
      },
      None => {
        let result = job_result.with_message("Unspecified action parameter");
        Err(MessageError::ProcessingError(result))
      }
    }
  }
}

fn main() {
  let worker_context = WorkerContext::default();
  start_worker(worker_context);
}