use crate::db::add_feed;

use super::db;
use super::widgets;
use iced::widget::scrollable;
use iced::{
    widget::{button, column, container, text},
    Element,
    Length::Fill,
};
pub fn user_interface() -> iced::Result {
    iced::run(update, view)
}

#[derive(Clone, Debug)]
enum Page {
    home,
    feed_view,
    all_items,
    item_view,
    testing,
}

struct State {
    page: Page,
    current_feed: usize
}
impl Default for State {
    fn default() -> Self {
        State { 
            page: Page::home,
            current_feed: 0
         }
    }
}

#[derive(Debug, Clone)]
pub enum Message {
    ChangePage(Page),
    LoadFeed(usize),
    AddFeed(String),
    ResetDB
}

fn update(state: &mut State, mes: Message) {
    match mes {
        Message::ChangePage(p) => state.page=p,
        Message::LoadFeed(feed_id) => {
            state.current_feed = feed_id;
            state.page=Page::feed_view;

        },
        Message::AddFeed(f) => {
            db::add_feed(&f);
        },
        Message::ResetDB => {
            db::reset();
        }

    }



}

fn view(state: &State) -> Element<'_, Message> {
    match state.page {
        Page::home => home(&state),
        Page::feed_view => feed_layout(&state),
        Page::all_items => item_list(&state),
        Page::item_view => item_view(&state),
        Page::testing => testing(&state),
    }
}

fn home(state: &State) -> Element<'_, Message> {
    container(column!(
        scrollable(widgets::list_feeds()).width(iced::Fill).height(iced::Fill),
        button("Go to test!").on_press(Message::ChangePage(Page::testing))
    ))
    .padding(15)
    .height(Fill)
    .width(Fill)
    .into()
}


fn feed_layout(state: &State) -> Element<'_, Message> {
    container(
        column!(
            button(text("Go Home")).on_press(Message::ChangePage(Page::home)),
            scrollable(widgets::list_items(state.current_feed)).width(iced::Fill).height(iced::Fill),
        )
    )
        .height(Fill)
        .width(Fill)
        .into()
}

fn item_view(state: &State) -> Element<'_, Message> {
    todo!()
}

fn item_list(state: &State) -> Element<'_,Message>{
    todo!()
}
fn testing(state: &State) -> Element<'_, Message> {
    column!(
        text("Dev Panel"),
        button("Add gabe.rocks").on_press(Message::AddFeed(String::from("https://gabe.rocks/rss"))),
        button("Add LSN").on_press(Message::AddFeed(String::from("https://libresolutions.network/rss"))),
        button("Wipe DB").on_press(Message::ResetDB),
        button("go back!").on_press(Message::ChangePage(Page::home))
    )
    .spacing(5)
    .into()
}