// Copyright (c) 2019-present Dmitry Stepanov and Fyrox Engine contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

use crate::{
    fyrox::{
        core::pool::Handle,
        gui::{
            button::ButtonMessage,
            grid::{Column, GridBuilder, Row},
            list_view::{ListViewBuilder, ListViewMessage},
            message::UiMessage,
            scroll_viewer::ScrollViewerBuilder,
            stack_panel::StackPanelBuilder,
            style::{resource::StyleResourceExt, Style},
            text::TextBuilder,
            widget::{WidgetBuilder, WidgetMessage},
            window::{WindowBuilder, WindowTitle},
            BuildContext, Thickness, UserInterface,
        },
    },
    load_image,
    message::MessageSender,
    utils::window_content,
    Message, Mode,
};
use fyrox::core::color::Color;
use fyrox::gui::button::Button;
use fyrox::gui::list_view::ListView;
use fyrox::gui::utils::ImageButtonBuilder;
use fyrox::gui::window::Window;
use fyrox::gui::Orientation;

pub struct CommandStackViewer {
    pub window: Handle<Window>,
    list: Handle<ListView>,
    sender: MessageSender,
    undo: Handle<Button>,
    redo: Handle<Button>,
    clear: Handle<Button>,
}

impl CommandStackViewer {
    pub fn new(ctx: &mut BuildContext, sender: MessageSender) -> Self {
        let list;
        let undo;
        let redo;
        let clear;
        let buttons_left = StackPanelBuilder::new(
            WidgetBuilder::new()
                .with_child({
                    undo = ImageButtonBuilder::default()
                        .with_image_color(Color::ORANGE_RED)
                        .with_image(load_image!("../../resources/undo.png"))
                        .with_tooltip("Undo The Command")
                        .with_tab_index(Some(0))
                        .build_button(ctx);
                    undo
                })
                .with_child({
                    redo = ImageButtonBuilder::default()
                        .with_image_color(Color::LIME_GREEN)
                        .with_image(load_image!("../../resources/redo.png"))
                        .with_tooltip("Redo The Command")
                        .with_tab_index(Some(1))
                        .build_button(ctx);
                    redo
                }),
        )
        .with_orientation(Orientation::Horizontal)
        .build(ctx);

        let buttons_right = StackPanelBuilder::new(WidgetBuilder::new().on_column(2).with_child({
            clear = ImageButtonBuilder::default()
                .with_image_color(Color::ORANGE)
                .with_image(load_image!("../../resources/clear.png"))
                .with_tooltip("Clear Command Stack\nChanges history will be erased.")
                .with_tab_index(Some(2))
                .build_button(ctx);
            clear
        }))
        .with_orientation(Orientation::Horizontal)
        .build(ctx);

        let buttons = GridBuilder::new(
            WidgetBuilder::new()
                .with_child(buttons_left)
                .with_child(buttons_right),
        )
        .add_column(Column::auto())
        .add_column(Column::stretch())
        .add_column(Column::auto())
        .add_row(Row::auto())
        .build(ctx);

        let window = WindowBuilder::new(WidgetBuilder::new().with_name("CommandStackPanel"))
            .with_title(WindowTitle::text("Command Stack"))
            .with_tab_label("Commands")
            .with_content(
                GridBuilder::new(
                    WidgetBuilder::new().with_child(buttons).with_child(
                        ScrollViewerBuilder::new(
                            WidgetBuilder::new()
                                .with_margin(Thickness::uniform(1.0))
                                .on_row(1),
                        )
                        .with_content({
                            list = ListViewBuilder::new(WidgetBuilder::new()).build(ctx);
                            list
                        })
                        .build(ctx),
                    ),
                )
                .add_column(Column::stretch())
                .add_row(Row::auto())
                .add_row(Row::stretch())
                .build(ctx),
            )
            .build(ctx);

        Self {
            window,
            list,
            sender,
            undo,
            redo,
            clear,
        }
    }

    pub fn handle_ui_message(&self, message: &UiMessage) {
        if let Some(ButtonMessage::Click) = message.data::<ButtonMessage>() {
            if message.destination() == self.undo {
                self.sender.send(Message::UndoCurrentSceneCommand);
            } else if message.destination() == self.redo {
                self.sender.send(Message::RedoCurrentSceneCommand);
            } else if message.destination() == self.clear {
                self.sender.send(Message::ClearCurrentSceneCommandStack);
            }
        }
    }

    pub fn sync_to_model(
        &mut self,
        top: Option<usize>,
        command_names: Vec<String>,
        ui: &mut UserInterface,
    ) {
        let items = command_names
            .into_iter()
            .enumerate()
            .rev() // First command in list is last on stack.
            .map(|(i, name)| {
                let brush = if let Some(top) = top {
                    if (0..=top).contains(&i) {
                        ui.style.property(Style::BRUSH_TEXT)
                    } else {
                        ui.style.property(Style::BRUSH_LIGHTEST)
                    }
                } else {
                    ui.style.property(Style::BRUSH_LIGHTEST)
                };

                TextBuilder::new(
                    WidgetBuilder::new()
                        .with_margin(Thickness {
                            left: 2.0,
                            top: 1.0,
                            right: 2.0,
                            bottom: 0.0,
                        })
                        .with_foreground(brush),
                )
                .with_text(name)
                .build(&mut ui.build_ctx())
                .to_base()
            })
            .collect();

        ui.send_sync(self.list, ListViewMessage::Items(items));
    }

    pub fn on_mode_changed(&mut self, ui: &UserInterface, mode: &Mode) {
        ui.send(
            window_content(self.window, ui),
            WidgetMessage::Enabled(mode.is_edit()),
        );
    }
}