use crate::domain::entities::layout::{Layout, TipoArquivo};
use crate::ui::app::App;
use crate::ui::message::Message;
use crate::ui::theme as t;
use iced::widget::{button, column, container, horizontal_space, row, scrollable, text};
use iced::{Alignment, Element, Length};

/// Tela de gerenciamento de layouts.
pub fn view(app: &App) -> Element<'_, Message> {
    let cabecalho = row![
        button("Voltar")
            .on_press(Message::IrParaImportacao)
            .style(t::btn_secondary),
        horizontal_space(),
        button("Importar JSON")
            .on_press(Message::ImportarLayoutJson)
            .style(t::btn_ghost),
    ]
    .spacing(8)
    .align_y(Alignment::Center)
    .width(Length::Fill);

    let titulo = text("Gerenciar Layouts").size(22).color(t::TEXT);

    let secao_csv = view_secao_layouts("Layouts CSV", &app.layouts_salvos, TipoArquivo::Csv);
    let secao_xlsx = view_secao_layouts("Layouts XLSX", &app.layouts_salvos, TipoArquivo::Xlsx);

    let content = column![titulo, cabecalho, secao_csv, secao_xlsx,]
        .spacing(16)
        .padding(20)
        .width(Length::Fill);

    container(scrollable(content))
        .width(Length::Fill)
        .height(Length::Fill)
        .style(t::fundo)
        .into()
}

fn view_secao_layouts<'a>(
    titulo: &'a str,
    layouts: &'a [Layout],
    tipo: TipoArquivo,
) -> Element<'a, Message> {
    let titulo_widget = text(titulo).size(16).color(t::TEXT_SECONDARY);

    let filtrados: Vec<&Layout> = layouts.iter().filter(|l| l.tipo() == tipo).collect();

    let mut col = column![titulo_widget].spacing(4);

    if filtrados.is_empty() {
        col = col.push(text("(nenhum layout salvo)").size(13).color(t::TEXT_MUTED));
        return container(col)
            .padding([12, 16])
            .width(Length::Fill)
            .style(t::card)
            .into();
    }

    for layout in filtrados {
        if let Some(id) = layout.id() {
            let linha = container(
                row![
                    text(layout.nome())
                        .size(14)
                        .color(t::TEXT)
                        .width(Length::Fill),
                    horizontal_space(),
                    button("Carregar")
                        .on_press(Message::LayoutSelecionado(id))
                        .style(t::btn_primary),
                    button("Exportar JSON")
                        .on_press(Message::ExportarLayoutJson(id))
                        .style(t::btn_ghost),
                    button("Excluir")
                        .on_press(Message::ExcluirLayout(id))
                        .style(t::btn_danger),
                ]
                .spacing(8)
                .align_y(Alignment::Center)
                .padding([10, 0]),
            )
            .width(Length::Fill);

            col = col.push(linha);

            // Separador entre linhas
            col = col.push(container(iced::widget::horizontal_rule(1)).width(Length::Fill));
        }
    }

    container(col)
        .padding([12, 16])
        .width(Length::Fill)
        .style(t::card)
        .into()
}