use iced::advanced::text::highlighter::Format;
use iced::widget::{Space, button, pane_grid, row, text, text_editor};
use iced::{Alignment, Background, Border, Font, Length, Theme};
use iced_custom_highlighter::{Highlight, Highlighter, Scope, Settings};

use super::style;
use crate::icon;
use crate::types::{DesignerPane, Message};
use crate::widget::tip;

fn highlight_style(theme: &Theme, scope: &Scope) -> Format<Font> {
    match scope {
        Scope::Custom { .. } | Scope::Other => Format {
            color: Some(theme.extended_palette().primary.strong.color),
            font: None,
        },
        _ => Highlight::default_style(theme, scope),
    }
}

pub fn view(
    editor_content: &text_editor::Content,
    is_focused: bool,
) -> pane_grid::Content<'_, Message> {
    let title_bar = pane_grid::TitleBar::new(text("Generated Code").center())
        .controls(pane_grid::Controls::dynamic(
            row![
                tip(
                    button(icon::copy())
                        .on_press(Message::CopyCode)
                        .padding([2, 7])
                        .style(button::text),
                    "Copy",
                    tip::Position::FollowCursor
                ),
                Space::with_width(20),
                button("Switch to Designer view")
                    .on_press(Message::SwitchPage(DesignerPane::DesignerView))
            ]
            .align_y(Alignment::Center),
            row![
                tip(
                    button(icon::copy())
                        .on_press(Message::CopyCode)
                        .padding([2, 7])
                        .style(button::text),
                    "Copy",
                    tip::Position::FollowCursor
                ),
                Space::with_width(20),
                button(icon::switch())
                    .on_press(Message::SwitchPage(DesignerPane::DesignerView))
            ]
            .align_y(Alignment::Center),
        ))
        .padding(10)
        .style(style::title_bar);

    pane_grid::Content::new(
        text_editor(editor_content)
            .on_action(Message::EditorAction)
            .font(Font::MONOSPACE)
            .highlight_with::<Highlighter>(
                Settings::new(vec![], highlight_style, "rs"),
                Highlight::to_format,
            )
            .style(|theme, _| {
                let palette = theme.extended_palette();
                text_editor::Style {
                    background: Background::Color(
                        palette.background.base.color,
                    ),
                    border: Border {
                        radius: 2.0.into(),
                        width: 1.0,
                        color: palette.background.strong.color,
                    },
                    icon: palette.background.weak.text,
                    placeholder: palette.background.strong.color,
                    value: palette.background.base.text,
                    selection: palette.primary.weak.color,
                }
            })
            .height(Length::Fill)
            .padding(20),
    )
    .title_bar(title_bar)
    .style(if is_focused {
        style::pane_focused
    } else {
        style::pane_active
    })
}