//use opencv::Result;
//use opencv::core::{self, Mat};

#[allow(dead_code)]
static DEBUG: bool = true;

pub mod annalyse;
pub mod borders;
pub mod compute_image;

use std::env::args;

use crate::point::Point;

use opencv::core::Mat;
use opencv::Result;
//use std::f64::consts::PI;

use opencv::prelude::*;
use opencv::{
    highgui,
    videoio::{self, VideoCapture},
};

mod param;
use param::Param;

mod sequence;
pub use sequence::{InitBorder, InitIdcode, LineDotted, LoadImage, SaveImage, Sequence, WaitSpace};

#[derive(Debug)]
pub struct Qualibration {
    seq: Vec<Box<dyn Sequence>>,
    cam: VideoCapture,

    pub param: Param,
}

impl Qualibration {
    pub fn new() -> Result<Self, Box<dyn std::error::Error>> {
        //let v: Vec<Box<dyn Sequence>> = vec![];

        let mut dir_name = "".to_string(); //"building.jpg".to_string(); // by default
        if let Some(dir_name_arg) = args().nth(1) {
            dir_name = dir_name_arg;
        }

        let mut cam = videoio::VideoCapture::new(0, videoio::CAP_ANY)?; // 0 is the default camera                   ;
        let opened_cam = videoio::VideoCapture::is_opened(&cam)?;
        if !opened_cam {
            panic!("Unable to open default camera!");
        }

        let mut frame = Mat::default();
        cam.read(&mut frame)?;

        // 9830400 -> r:150, v:0, b:0
        let beg = Point::from((0., 0., 9830400));
        let beg2 = Point::from((0., 4095., 9830400));
        let end = Point::from((4095., 4095., 9830400));
        let seq: Vec<Box<dyn Sequence>> = vec![
            Box::new(WaitSpace::new(beg, end, 400)),
            Box::new(InitBorder::new(beg, end, 400)),
            Box::new(LineDotted::new(beg, end, 2, true, false, 400)),
            //Box::new(InitIdcode::new(beg2, end, 400)),
        ];
        let seq_names = get_sequence_name(&seq);
        let mut param = Param::new(dir_name.to_owned(), seq_names)?;
        if !param.capture_mode {
            param.load_image()?;
        }
        Ok(Qualibration { seq, cam, param })
    }

    pub fn draw_sequence(&mut self) -> Option<Vec<Point>> {
        if self.param.seq_id >= self.seq.len() {
            return None;
        }

        let pl = self.seq[self.param.seq_id].draw(&self.param);

        if pl.is_none() {
            self.param.seq_id += 1;
            if self.param.capture_mode {
                self.param.imgs.push(vec![]);
            }
        }

        pl
    }

    pub fn run_step(self: &mut Self) -> Result<(), Box<dyn std::error::Error>> {
        let seq_id = self.param.seq_id;
        let seq_name = self.seq[seq_id].sequence_name();
        println!("\n\n\n\n\n\n\n\n");
        println!("\t\t==================================================================");
        println!("\t\t==================================================================");
        println!("\t\t==================================================================");
        println!("\n\n\n\n\n\n\n\n");
        println!("seq[{seq_id}]: {seq_name}");

        if self.param.capture_mode {
            let millis_nb = self.seq[self.param.seq_id].wait_milis();
            let millis = std::time::Duration::from_millis(millis_nb); // TODO: find solution to know when change has been done
            std::thread::sleep(millis);
        }

        let mut frame = Mat::default();
        //println!("sequence: {}:{:?}", self.param.seq_id, &self.seq[self.param.seq_id]);
        if self.param.capture_mode {
            self.cam.read(&mut frame)?;
            highgui::imshow("camera", &frame)?;

            if frame.size()?.width > 0 && self.seq[self.param.seq_id].is_capture() {
                self.param.imgs[self.param.seq_id].push(frame.clone());
            }
        }

        if frame.size()?.width > 0 || !self.param.capture_mode {
            self.seq[self.param.seq_id].compute_sequence(&mut self.param)?;
        }

        Ok(())
    }
}

pub fn get_sequence_name(seq: &Vec<Box<dyn Sequence>>) -> Vec<String> {
    let mut v = vec![];

    for i in 0..seq.len() {
        v.push(seq[i].sequence_name());
    }

    v
}