use super::*;

pub(super) fn build(
    p: &mut Painter,
    state: &mut DeveloperToolsState,
    records: &[Exchange],
    viewport: Rect,
) {
    let x = viewport.x;
    let w = viewport.width;
    let bottom = viewport.height - 22.0;

    p.fill(Rect::new(x, 32.0, w, 30.0), BAR);
    p.enabled_button(
        Rect::new(x + 3.0, 32.0, 62.0, 29.0),
        "Clear",
        Action::ClearConsole,
        records.iter().any(|r| {
            r.id > state.console_after
                && matches!(r.method.as_str(), "PUT" | "POST" | "DELETE")
                && !r.path.ends_with("/events")
        }),
    );
    p.button(
        Rect::new(x + 68.0, 32.0, 106.0, 29.0),
        if state.follow {
            "Follow: on"
        } else {
            "Follow: off"
        },
        Action::Follow,
        state.follow,
    );
    p.button(
        Rect::new(x + 181.0, 32.0, 119.0, 29.0),
        "Reset session",
        Action::ResetSession,
        false,
    );
    if w > 520.0 {
        p.label(x + 309.0, 39.0, "app.main · live objects", MUTED, false);
    }
    let mut lines = Vec::new();
    for r in records.iter().filter(|r| {
        r.id > state.console_after
            && (r.method == "PUT" || r.method == "POST" || r.method == "DELETE")
            && !r.path.ends_with("/events")
    }) {
        let kind = if r.path.ends_with("/repl") {
            if r.method == "DELETE" {
                "RESET SESSION"
            } else {
                "REPL · live objects"
            }
        } else if r.path.ends_with("/evaluate") {
            "ISOLATED API EVALUATION"
        } else if r.method == "PUT" {
            "FULL SOURCE · live program"
        } else {
            "CLEAR DOCUMENT"
        };
        let local = r.origin == "Console" && r.path.ends_with("/repl") && r.method == "POST";
        if !local {
            let mut title = Line::new(
                format!("#{}  {}  {}  {}", r.id, r.timestamp, r.origin, kind),
                MUTED,
            );
            title.divider = Some(Divider::Accent);
            title.action = Some(Action::Request(r.id));
            lines.push(title);
        }
        for (i, line) in r.request.split('\n').enumerate() {
            lines.push(Line::new(
                format!("{}{line}", if i == 0 { "> " } else { "  " }),
                TEXT,
            ));
        }
        let color = if r.status.is_some_and(|s| s >= 400) {
            ERROR
        } else {
            OK
        };
        if let Some(status) = r.status {
            if !local {
                lines.push(Line::new(
                    format!("‹ {status} · {} ms", r.elapsed_ms),
                    color,
                ));
            }
            console_result(&mut lines, &r.response, color);
        } else {
            lines.push(Line::new("  Executing…", MUTED));
        }
        let mut separator = Line::new("", MUTED);
        separator.divider = Some(Divider::Neutral);
        lines.push(separator);
    }
    if lines.is_empty() {
        multiline(
            &mut lines,
            "Endor · live session\nCreate objects here; call page.render(...) to display.\n",
            MUTED,
        );
    }
    use std::hash::{Hash, Hasher};
    let mut hash = std::collections::hash_map::DefaultHasher::new();
    for line in &lines {
        line.value.hash(&mut hash);
    }
    let stamp = hash.finish();
    let output_changed = stamp != state.console_stamp;
    state.console_stamp = stamp;
    let first_input = lines.len();
    let area = Rect::new(x + 4.0, 63.0, w - 5.0, (bottom - 88.0).max(1.0));
    let mut input = state.input.clone();
    if state.focus == Some(Focus::Input) {
        input.insert_str(state.cursor, &state.preedit);
    }
    for (i, line) in input.split('\n').enumerate() {
        let mut line = Line::new(format!("{}{line}", if i == 0 { "> " } else { "  " }), TEXT);
        line.selected = state.selection && state.focus == Some(Focus::Input);
        lines.push(line);
    }
    let prefix = text::measure("> ", TextStyle::code()).width;
    let before = &state.input[..state.cursor];
    let row = before.matches('\n').count() as f32;
    let column = before.rsplit('\n').next().unwrap_or("");
    let caret_x =
        prefix + text::measure(&format!("{column}{}", state.preedit), TextStyle::code()).width;
    let caret_y = (first_input as f32 + row) * ROW;
    let follow = state.follow && output_changed && !state.reveal_input;
    if state.reveal_input {
        let s = &mut state.scroll[Region::Transcript as usize];
        s.y = s.y.clamp(
            (caret_y + ROW + 16.0 - area.height).max(0.0).min(caret_y),
            caret_y,
        );
        s.x = s.x.clamp((caret_x + 24.0 - area.width).max(0.0), caret_x);
        state.reveal_input = false;
    }
    p.lines(area, Region::Transcript, &lines, state, follow);
    let scroll = state.scroll[Region::Transcript as usize];
    let origin = Point::new(
        area.x + 8.0 + prefix - scroll.x,
        area.y + 5.0 + first_input as f32 * ROW - scroll.y,
    );
    p.layout.input = Some(ConsoleInputLayout {
        viewport: area,
        origin,
    });
    let input_top = origin.y.max(area.y);
    let input_bottom =
        (origin.y + state.input.split('\n').count() as f32 * ROW).min(area.y + area.height - 9.0);
    if input_bottom > input_top {
        p.ui.inline_input(
            Rect::new(
                area.x,
                input_top,
                (area.width - 9.0).max(0.0),
                input_bottom - input_top,
            ),
            Action::Focus(Focus::Input),
        );
    }
    if state.focus == Some(Focus::Input) {
        p.ui.list.push(DrawCommand::PushClip(Rect::new(
            area.x,
            area.y,
            (area.width - 9.0).max(0.0),
            (area.height - 9.0).max(0.0),
        )));
        p.fill(
            Rect::new(
                area.x + 8.0 + caret_x - scroll.x,
                origin.y + row * ROW + 1.0,
                1.0,
                ROW - 2.0,
            ),
            TEXT,
        );
        p.ui.list.push(DrawCommand::PopClip);
    }
    p.label(
        x + 10.0,
        bottom - 23.0,
        if state.input_error.is_empty() {
            "Enter: run  ·  Shift+Enter: newline  ·  ⌘/Ctrl+↑↓: history"
        } else {
            &state.input_error
        },
        if state.input_error.is_empty() {
            MUTED
        } else {
            ERROR
        },
        false,
    );
}