//! Exported clips: local MP4 files that never expire automatically.

use clipbin_core::library::{format_ago, format_bytes, format_length};
use gpui::{
    AnyElement, ClickEvent, Context, FontWeight, IntoElement, Pixels, canvas, div, prelude::*, px,
};

use crate::{
    app::ClipbinApp,
    components::{ButtonStyle, button, chip, count, empty_state, page_header},
    screens::{corner, thumbnail},
    theme,
};

pub fn render(app: &ClipbinApp, cx: &mut Context<ClipbinApp>) -> AnyElement {
    let clips = &app.library.clips;
    let total: u64 = clips.iter().map(|clip| clip.size_bytes).sum();
    let header = page_header(
        "Clips",
        if clips.is_empty() {
            "Clips you save are kept until you delete them.".to_owned()
        } else {
            format!(
                "{} · {} · kept until you delete them",
                count(clips.len(), "clip"),
                format_bytes(total)
            )
        },
        vec![
            button(
                "open-clips-folder",
                ButtonStyle::Secondary,
                Some("folder-open"),
                Some("Open folder"),
            )
            .on_click(cx.listener(|app, _: &ClickEvent, _, cx| {
                app.service.open_clip(None);
                cx.notify();
            }))
            .into_any_element(),
        ],
    );

    let failed_actions = (app.failed_exports > 0).then(|| {
        div()
            .flex()
            .items_center()
            .gap_2()
            .child(format!(
                "{} failed exports · source footage kept",
                app.failed_exports
            ))
            .child(
                button("retry-exports", ButtonStyle::Secondary, None, Some("Retry")).on_click(
                    cx.listener(|app, _: &ClickEvent, _, cx| {
                        app.service.retry_exports();
                        cx.notify();
                    }),
                ),
            )
            .child(
                button(
                    "release-exports",
                    ButtonStyle::Ghost,
                    None,
                    Some("Release protection"),
                )
                .on_click(cx.listener(|app, _: &ClickEvent, _, cx| {
                    app.service.release_exports();
                    cx.notify();
                })),
            )
    });
    if clips.is_empty() {
        return div()
            .flex()
            .flex_col()
            .gap_6()
            .child(header)
            .children(failed_actions)
            .child(empty_state(
                "scissors",
                "No clips yet",
                "Press the clip hotkey in game to save the last two minutes, or select a range on a session's timeline.",
            ))
            .into_any_element();
    }

    let now = app.now();
    let cards = clips.iter().map(|clip| {
        let id = clip.id;
        div()
            .flex()
            .flex_col()
            .min_w_0()
            .gap_3()
            .child(
                thumbnail(&clip.game, app.playback.clip_thumbnails.get(&clip.id)).child(
                    corner()
                        .bottom_2p5()
                        .right_2p5()
                        .child(chip(format_length(clip.length))),
                ),
            )
            .child(
                div()
                    .flex()
                    .flex_col()
                    .min_w_0()
                    .gap_2()
                    .px_1()
                    .child(
                        div()
                            .flex()
                            .flex_col()
                            .min_w_0()
                            .gap_0p5()
                            .child(
                                div()
                                    .text_base()
                                    .font_weight(FontWeight::SEMIBOLD)
                                    .text_color(theme::foreground())
                                    .child(label(clip.game.clone(), px(24.))),
                            )
                            .child(div().text_xs().text_color(theme::subtle()).child(label(
                                format!(
                                    "{} · {}",
                                    format_ago(clip.created, now),
                                    format_bytes(clip.size_bytes)
                                ),
                                px(18.),
                            ))),
                    )
                    .child(
                        div()
                            .flex()
                            .items_center()
                            .justify_end()
                            .gap_2()
                            .flex_shrink_0()
                            .child(
                                button(("open-clip", id), ButtonStyle::Ghost, Some("play"), None)
                                    .flex_shrink_0()
                                    .rounded_full()
                                    .on_click(cx.listener(move |app, _: &ClickEvent, _, cx| {
                                        app.service.open_clip(Some(id));
                                        cx.notify();
                                    })),
                            )
                            .child(
                                button(
                                    ("delete-clip", id),
                                    ButtonStyle::Ghost,
                                    None,
                                    Some("Delete"),
                                )
                                .flex_shrink_0()
                                .on_click(cx.listener(
                                    move |app, _: &ClickEvent, _, cx| {
                                        app.service.delete_clip(id);
                                        cx.notify();
                                    },
                                )),
                            ),
                    ),
            )
    });

    div()
        .flex()
        .flex_col()
        .gap_6()
        .child(header)
        .children(failed_actions)
        .child(
            div()
                .grid()
                .grid_cols(3)
                .gap_x_4()
                .gap_y_8()
                .children(cards),
        )
        .into_any_element()
}

// GPUI 0.2.2 caches nowrap widths and mutates text runs during remeasurement.
// Shape once at the final card bounds to retain both ellipsis and font styling.
fn label(text: String, height: Pixels) -> impl IntoElement {
    canvas(
        move |bounds, window, cx| {
            let style = window.text_style();
            let font_size = style.font_size.to_pixels(window.rem_size());
            let line_height = style
                .line_height
                .to_pixels(font_size.into(), window.rem_size());
            let text: gpui::SharedString = text.replace(['\n', '\r'], " ").into();
            let mut runs = vec![style.to_run(text.len())];
            let text = cx
                .text_system()
                .line_wrapper(style.font(), font_size)
                .truncate_line(text, bounds.size.width, "…", &mut runs);
            (
                window
                    .text_system()
                    .shape_line(text, font_size, &runs, None),
                line_height,
            )
        },
        |bounds, (line, line_height), window, cx| {
            let _ = line.paint(bounds.origin, line_height, window, cx);
        },
    )
    .w_full()
    .h(height)
    .overflow_hidden()
}