// Prevent console window in addition to Slint window in Windows release builds when, e.g., starting the app via file manager. Ignored on other platforms.
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]

use std::{error::Error, rc::Rc, sync::{Arc, Mutex}};

use aliveline::{config::Config, load_config, log::{Event, Log}};
use chrono::{Datelike, Timelike};
use slint::{Model, ModelRc, SharedString, ToSharedString, VecModel};
use toml::value::{Date as TomlDate, Time};

slint::include_modules!();

impl From<Event> for TimelineEvent {
    fn from(event: Event) -> Self {
        let start = (event.start.hour as i32) * 3600 + (event.start.minute as i32) * 60 + (event.start.second as i32);
        let end = (event.end.hour as i32) * 3600 + (event.end.minute as i32) * 60 + (event.end.second as i32);
        TimelineEvent { start, duration: end - start, label: event.name.to_shared_string(), finished: event.finished }
    }
}

impl From<TimelineEvent> for Event {
    fn from(event: TimelineEvent) -> Self {
        let start = Time {
            hour: (event.start / 3600) as u8,
            minute: ((event.start % 3600) / 60) as u8,
            second: (event.start % 60) as u8,
            nanosecond: 0
        };
        let endsecs = event.start + event.duration;
        let end = Time {
            hour: (endsecs / 3600) as u8,
            minute: ((endsecs % 3600) / 60) as u8,
            second: (endsecs % 60) as u8,
            nanosecond: 0
        };
        Event { start, end, name: event.label.to_string(), finished: event.finished }
    }
}

fn main() -> Result<(), Box<dyn Error>> {
    let ui = AppWindow::new()?;
    
    let now = chrono::Local::now();
    let offset = now.hour() * 3600 + now.minute() * 60 + now.second();

    let date: TomlDate = TomlDate { day: now.day() as u8, month: now.month() as u8, year: now.year() as u16 };

    let config: Arc<Config> = Arc::new(load_config());
    let writing_log: Arc<Mutex<Log>> = Arc::new(Mutex::new(Log::load_from(&config, date)));

    {
        println!("Log: {:?}", writing_log.lock().unwrap().events);
        let ui_weak = ui.as_weak();
        let log = writing_log.clone();
        (move || {
            println!("c");
            let ui = ui_weak.unwrap();
            let log_guard = log.lock().expect("Log shouldn't be used twice");
            let events: Vec<TimelineEvent> = (*log_guard).events.iter().map(|event| TimelineEvent::from((*event).clone())).collect();
            let in_progress = events.iter().any(|event| !event.finished);
            let model: ModelRc<TimelineEvent> = Rc::new(VecModel::from(events)).into();
            println!("get: {:?}", model);
            ui.set_record_events(model);
            ui.set_in_progress(in_progress);
        })()
    }

    ui.invoke_update_record_offset(offset as i32);
    ui.invoke_load_log();
    ui.invoke_another_call();

    ui.on_save_log({
        let config = config.clone();
        let log = writing_log.clone();
        move || {
            let log_guard = log.lock().expect("Log shouldn't be used twice");
            if let Err(error) = (*log_guard).save(&config) {
                eprintln!("Error occured while saving log: {error}");
            }
        }
    });

    ui.on_another_call({
        println!("outside move");
        move || {
            println!("inside move");
        }
    });

    
    ui.on_update_record_visible_time({
        let ui_weak = ui.as_weak();
        move |hours_string: SharedString| {
            let ui = ui_weak.unwrap();
            let hours = hours_string.split(' ')
                .next()
                .map(|h| h.parse::<i32>().unwrap())
                .unwrap();
            ui.set_record_visible_time(hours * 3600);
        }
    });
    
    ui.on_start_new_event({
        let ui_weak = ui.as_weak();
        let log = writing_log.clone();
        move |event_name: SharedString| {
            let ui = ui_weak.unwrap();


            let events_rc = ui.get_record_events();
            let events = events_rc.as_any()
                .downcast_ref::<VecModel<TimelineEvent>>()
                .unwrap();
            let offset = ui.get_record_offset();
            
            let event = TimelineEvent {
                duration: 0,
                finished: false,
                label: event_name,
                start: offset
            };
            
            {
                let mut log_guard = log.lock().expect("Log shouldn't be used twice");
                (*log_guard).events.push(Event::from(event.clone()));
            }

            ui.invoke_save_log();

            events.push(event);
        }
    });

    ui.on_stop_event({
        let ui_weak = ui.as_weak();
        let log = writing_log.clone();
        move || {
            let ui = ui_weak.unwrap();
            let events_rc = ui.get_record_events();
            let events = events_rc.as_any()
                .downcast_ref::<VecModel<TimelineEvent>>().unwrap();
            let offset = ui.get_record_offset();
            
            let event_id = events.iter()
                .position(|data| !data.finished)
                .unwrap();
            let event = events.row_data(event_id)
                .expect("stop-event called without unfinished events");
            let new_event = TimelineEvent { 
                duration: offset - event.start,
                finished: true,
                label: event.label,
                start: event.start
            };

            {
                let mut log_guard = log.lock().expect("Log shouldn't be used twice");
                (*log_guard).events.push(Event::from(new_event.clone()));
                let index = (*log_guard).events.iter().position(|data| !data.finished).unwrap();
                (*log_guard).events.swap_remove(index);
            }

            ui.invoke_save_log();

            events.set_row_data(event_id, new_event);
        }
    });

    ui.on_chain_event({
        let ui_weak = ui.as_weak();
        move |event_name: SharedString| {
            let ui = ui_weak.unwrap();
            ui.invoke_stop_event();
            ui.invoke_start_new_event(event_name);
        }
    });


    ui.run()?;

    Ok(())
}