use iced::widget::{column, container, scrollable, text, text_input};
use iced::Alignment::Center;
use iced::{Element, Fill, Task, Theme};

// use uuid::Uuid;

pub fn main() -> iced::Result {
    iced::application("Zieltakt", App::update, App::view)
        .theme(theme)
        .run_with(App::new)
}

fn theme(_state: &App) -> Theme {
    Theme::Nightfly
}

#[derive(Debug, Default, Clone)]
enum App {
    #[default]
    Loading,
    Loaded(State),
}

#[derive(Debug, Clone, Default)]
struct State {
    input_value: String,
    habits: Vec<Habit>,
    dirty: bool,
    saving: bool,
}

#[derive(Debug, Clone)]
struct Habit {
    // #[serde(default = "Uuid::new_v4")]
    // id: Uuid,
    description: String,
    completed: bool,
    // #[serde(skip)]
    // state: TaskState,
}

#[derive(Debug, Clone)]
enum Message {
    InputChanged(String),
    CreateTask,
}

impl App {
    fn new() -> (Self, Task<Message>) {
        // TODO: Imlepment loading using serde
        (App::Loaded(State::default()), Task::none())
    }

    fn update(app: &mut App, message: Message) -> Task<Message> {
        match app {
            App::Loading => {
                // TODO: Imlepment loading using serde
                Task::none()
            }
            App::Loaded(state) => {
                let command = match message {
                    Message::InputChanged(value) => {
                        state.input_value = value;
                        Task::none()
                    }
                    Message::CreateTask => {
                        state.habits.push(Habit {
                            description: state.input_value.clone(),
                            completed: false,
                        });
                        state.input_value = String::new();
                        println!("{:?}", state.habits);
                        Task::none()
                    }

                };
                return command;
            }
        }
    }

    fn view(app: &App) -> Element<Message> {
        match &app {
            App::Loading => text("Loading...").into(),
            App::Loaded(State { input_value, .. }) => {
                let title = text("todos")
                    .width(Fill)
                    .size(100)
                    .color([0.5, 0.5, 0.5])
                    .align_x(Center);

                let input = text_input("What needs to be done?", input_value)
                    .id("new-task")
                    .on_input(Message::InputChanged)
                    .on_submit(Message::CreateTask)
                    .padding(15)
                    .size(30)
                    .align_x(Center);

                let content = column![title, input].spacing(20).max_width(800);

                scrollable(container(content).center_x(Fill).padding(40)).into()
            }
        }
    }
}