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// ┃ ██████ ██████ ██████       █      █      █      █      █ █▄  ▀███ █       ┃
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// ┃ Copyright (c) 2017, the Perspective Authors.                              ┃
// ┃ ╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌ ┃
// ┃ This file is part of the Perspective library, distributed under the terms ┃
// ┃ of the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). ┃
// ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛

use std::rc::Rc;

use yew::prelude::*;

use super::containers::dropdown_menu::*;
use crate::config::*;
use crate::renderer::*;
use crate::session::Session;

pub type ExportDropDownMenuItem = DropDownMenuItem<ExportFile>;

#[derive(Properties, PartialEq)]
pub struct ExportDropDownMenuProps {
    pub renderer: Renderer,
    pub session: Session,
    pub callback: Callback<ExportFile>,
}

pub enum ExportDropDownMenuMsg {
    TitleChange,
}

#[derive(Default)]
pub struct ExportDropDownMenu {
    title: String,
    input_ref: NodeRef,
    invalid: bool,
}

impl Component for ExportDropDownMenu {
    type Message = ExportDropDownMenuMsg;
    type Properties = ExportDropDownMenuProps;

    fn view(&self, ctx: &Context<Self>) -> yew::virtual_dom::VNode {
        let callback = ctx.link().callback(|_| ExportDropDownMenuMsg::TitleChange);
        let is_chart = ctx.props().renderer.is_chart();
        html! {
            <>
                <span class="dropdown-group-label">{ "Save as" }</span>
                <input
                    class={if self.invalid { "invalid" } else { "" }}
                    oninput={callback}
                    ref={&self.input_ref}
                    value={self.title.to_owned()}
                />
                <DropDownMenu<ExportFile>
                    values={Rc::new(get_menu_items(&self.title, is_chart))}
                    callback={&ctx.props().callback}
                />
            </>
        }
    }

    fn update(&mut self, _ctx: &Context<Self>, msg: Self::Message) -> bool {
        match msg {
            ExportDropDownMenuMsg::TitleChange => {
                self.title = self
                    .input_ref
                    .cast::<web_sys::HtmlInputElement>()
                    .unwrap()
                    .value();

                self.invalid = self.title.is_empty();
                true
            },
        }
    }

    fn create(ctx: &Context<Self>) -> Self {
        Self {
            title: ctx
                .props()
                .session
                .get_title()
                .unwrap_or_else(|| "untitled".to_owned()),
            ..Default::default()
        }
    }
}

fn get_menu_items(name: &str, is_chart: bool) -> Vec<ExportDropDownMenuItem> {
    vec![
        ExportDropDownMenuItem::OptGroup(
            "Current View".into(),
            if is_chart {
                vec![
                    ExportMethod::Csv.new_file(name, is_chart),
                    ExportMethod::Json.new_file(name, is_chart),
                    ExportMethod::Ndjson.new_file(name, is_chart),
                    ExportMethod::Arrow.new_file(name, is_chart),
                    ExportMethod::Html.new_file(name, is_chart),
                    ExportMethod::Plugin.new_file(name, is_chart),
                ]
            } else {
                vec![
                    ExportMethod::Csv.new_file(name, is_chart),
                    ExportMethod::Json.new_file(name, is_chart),
                    ExportMethod::Ndjson.new_file(name, is_chart),
                    ExportMethod::Arrow.new_file(name, is_chart),
                    ExportMethod::Html.new_file(name, is_chart),
                ]
            },
        ),
        ExportDropDownMenuItem::OptGroup("All".into(), vec![
            ExportMethod::CsvAll.new_file(name, is_chart),
            ExportMethod::JsonAll.new_file(name, is_chart),
            ExportMethod::NdjsonAll.new_file(name, is_chart),
            ExportMethod::ArrowAll.new_file(name, is_chart),
        ]),
        ExportDropDownMenuItem::OptGroup("Config".into(), vec![
            ExportMethod::JsonConfig.new_file(name, is_chart),
        ]),
    ]
}
