use iced::executor;
use iced::widget::{column, container, row, slider, text};
use iced::{Application, Command, Element, Length, Settings, Theme};

use std::time::Duration;

mod circular;
mod easing;
mod linear;

use circular::Circular;
use linear::Linear;

pub fn main() -> iced::Result {
    ProgressIndicators::run(Settings {
        antialiasing: true,
        ..Default::default()
    })
}

struct ProgressIndicators {
    cycle_duration: f32,
}

impl Default for ProgressIndicators {
    fn default() -> Self {
        Self {
            cycle_duration: 2.0,
        }
    }
}

#[derive(Debug, Clone, Copy)]
enum Message {
    CycleDurationChanged(f32),
}

impl Application for ProgressIndicators {
    type Message = Message;
    type Flags = ();
    type Executor = executor::Default;
    type Theme = Theme;

    fn new(_flags: Self::Flags) -> (Self, Command<Message>) {
        (Self::default(), Command::none())
    }

    fn title(&self) -> String {
        String::from("Progress Indicators - Iced")
    }

    fn update(&mut self, message: Message) -> Command<Message> {
        match message {
            Message::CycleDurationChanged(duration) => {
                self.cycle_duration = duration;
            }
        }

        Command::none()
    }

    fn view(&self) -> Element<Message> {
        let column = easing::EXAMPLES
            .iter()
            .zip(["Decelerating:", "Accelerating:", "Standard:"])
            .fold(column![], |column, (easing, label)| {
                column.push(
                    row![
                        text(label).width(150),
                        Linear::new().easing(easing).cycle_duration(
                            Duration::from_secs_f32(self.cycle_duration)
                        ),
                        Circular::new().easing(easing).cycle_duration(
                            Duration::from_secs_f32(self.cycle_duration)
                        )
                    ]
                    .align_items(iced::Alignment::Center)
                    .spacing(20.0),
                )
            })
            .spacing(20);

        container(
            column.push(
                row(vec![
                    text("Cycle duration:").into(),
                    slider(1.0..=1000.0, self.cycle_duration * 100.0, |x| {
                        Message::CycleDurationChanged(x / 100.0)
                    })
                    .width(150.0)
                    .into(),
                    text(format!("{:.2}s", self.cycle_duration)).into(),
                ])
                .align_items(iced::Alignment::Center)
                .spacing(20.0),
            ),
        )
        .width(Length::Fill)
        .height(Length::Fill)
        .center_x()
        .center_y()
        .into()
    }
}