//! Bottom status bar — Model/Layout tabs + OSNAP toggle + status info

use iced::widget::tooltip::Position as TipPos;
use iced::widget::{button, container, row, text, tooltip, Row};
use iced::{Background, Border, Color, Element, Length, Theme};

use crate::snap::Snapper;
use crate::Message;

#[derive(Clone, Default)]
pub struct StatusBar {
    #[allow(dead_code)]
    pub coord_display: String,
}

impl StatusBar {
    pub fn new() -> Self {
        Self {
            coord_display: "MODEL".into(),
        }
    }

    pub fn view<'a>(
        &'a self,
        snapper: &'a Snapper,
        popup_open: bool,
        ortho_mode: bool,
        polar_mode: bool,
        show_grid: bool,
        layouts: Vec<String>,
        current_layout: String,
    ) -> Element<'a, Message> {
        let menu_btn = button(text("≡").size(14).color(ICON_COLOR))
            .on_press(Message::Command("MENU".into()))
            .style(|_: &Theme, _| button::Style {
                background: Some(Background::Color(Color::TRANSPARENT)),
                ..Default::default()
            })
            .padding([2, 8]);

        let add_btn = button(text("+").size(12).color(ICON_COLOR))
            .on_press(Message::LayoutCreate)
            .style(|_: &Theme, _| button::Style {
                background: Some(Background::Color(Color::TRANSPARENT)),
                ..Default::default()
            })
            .padding([3, 7]);

        // ── Right side ────────────────────────────────────────────────────
        let osnap_active = snapper.is_active();
        let snap_grid_on = snapper.is_on(crate::snap::SnapType::Grid) && snapper.snap_enabled;

        let space_label = if current_layout == "Model" {
            "MODEL"
        } else {
            "LAYOUT"
        };
        let right_status = row![
            tip(
                toggle_pill("SNAP", snap_grid_on, Message::ToggleGridSnap),
                "Snap to Grid\nF9"
            ),
            tip(
                toggle_pill("GRID", show_grid, Message::ToggleGrid),
                "Show Grid\nF7"
            ),
            tip(
                toggle_pill("ORTHO", ortho_mode, Message::ToggleOrtho),
                "Orthogonal Mode\nF8"
            ),
            tip(
                toggle_pill("POLAR", polar_mode, Message::TogglePolar),
                "Polar Tracking (45°)\nF10"
            ),
            osnap_btn(osnap_active, snapper.snap_enabled, popup_open),
            status_pill(space_label),
            status_pill("1:1"),
        ]
        .spacing(2);

        let mut bar = Row::new().align_y(iced::Center).spacing(0);
        bar = bar.push(menu_btn);
        for name in layouts {
            let is_active = name == current_layout;
            bar = bar.push(space_tab(name, is_active));
        }
        bar = bar.push(add_btn);
        bar = bar.push(iced::widget::Space::new().width(Length::Fill));
        bar = bar.push(right_status);

        container(bar)
            .style(|_: &Theme| container::Style {
                background: Some(Background::Color(BAR_BG)),
                border: Border {
                    color: BORDER_COLOR,
                    width: 1.0,
                    radius: 0.0.into(),
                },
                ..Default::default()
            })
            .width(Length::Fill)
            .height(26)
            .padding([0, 4])
            .into()
    }
}

// ── Tooltip helper ────────────────────────────────────────────────────────

fn tip<'a>(content: Element<'a, Message>, label: &'static str) -> Element<'a, Message> {
    tooltip(
        content,
        container(text(label).size(11).color(Color::WHITE))
            .style(|_: &Theme| container::Style {
                background: Some(Background::Color(Color {
                    r: 0.13,
                    g: 0.13,
                    b: 0.13,
                    a: 0.97,
                })),
                border: Border {
                    color: Color {
                        r: 0.35,
                        g: 0.35,
                        b: 0.35,
                        a: 1.0,
                    },
                    width: 1.0,
                    radius: 3.0.into(),
                },
                text_color: Some(Color::WHITE),
                ..Default::default()
            })
            .padding([4, 8]),
        TipPos::Top,
    )
    .into()
}

// ── Simple toggle pill ────────────────────────────────────────────────────

fn toggle_pill(label: &'static str, active: bool, msg: Message) -> Element<'static, Message> {
    button(text(label).size(10).color(if active {
        OSNAP_ON_TEXT
    } else {
        OSNAP_OFF_TEXT
    }))
    .on_press(msg)
    .style(move |_: &Theme, status| button::Style {
        background: Some(Background::Color(match (active, status) {
            (true, button::Status::Hovered) => SNAP_ON_HOVER,
            (true, _) => SNAP_ON_BG,
            (false, button::Status::Hovered) => SNAP_OFF_HOVER,
            (false, _) => SNAP_OFF_BG,
        })),
        border: Border {
            color: if active { SNAP_BORDER_ON } else { BORDER_COLOR },
            width: 1.0,
            radius: 2.0.into(),
        },
        text_color: if active {
            OSNAP_ON_TEXT
        } else {
            OSNAP_OFF_TEXT
        },
        shadow: iced::Shadow::default(),
        snap: false,
    })
    .padding([2, 6])
    .into()
}

// ── OSNAP split button ────────────────────────────────────────────────────
//
// Left part  ("⚡ OSNAP"): toggles the global snap on/off.
// Right part ("▾"):        opens the snap-type dropdown.

fn osnap_btn(active: bool, snap_enabled: bool, open: bool) -> Element<'static, Message> {
    let bg = match (active || snap_enabled, open) {
        (true, true) => SNAP_ON_HOVER,
        (true, false) => SNAP_ON_BG,
        (false, _) => SNAP_OFF_BG,
    };
    let border_color = if open {
        ACCENT
    } else if active {
        SNAP_BORDER_ON
    } else {
        BORDER_COLOR
    };
    let text_color = if active {
        OSNAP_ON_TEXT
    } else {
        OSNAP_OFF_TEXT
    };

    let left = button(text("⚡ OSNAP").size(10).color(text_color))
        .on_press(Message::ToggleSnapEnabled)
        .style(move |_: &Theme, status| button::Style {
            background: Some(Background::Color(match status {
                button::Status::Hovered => {
                    if active || snap_enabled {
                        SNAP_ON_HOVER
                    } else {
                        SNAP_OFF_HOVER
                    }
                }
                _ => bg,
            })),
            border: Border {
                color: border_color,
                width: 1.0,
                radius: iced::border::Radius {
                    top_left: 2.0,
                    top_right: 0.0,
                    bottom_right: 0.0,
                    bottom_left: 2.0,
                },
            },
            text_color,
            shadow: iced::Shadow::default(),
            snap: false,
        })
        .padding([2, 6]);

    let right = button(text("▾").size(9).color(text_color))
        .on_press(Message::ToggleSnapPopup)
        .style(move |_: &Theme, status| button::Style {
            background: Some(Background::Color(match status {
                button::Status::Hovered => {
                    if active || snap_enabled {
                        SNAP_ON_HOVER
                    } else {
                        SNAP_OFF_HOVER
                    }
                }
                _ => bg,
            })),
            border: Border {
                color: border_color,
                width: 1.0,
                radius: iced::border::Radius {
                    top_left: 0.0,
                    top_right: 2.0,
                    bottom_right: 2.0,
                    bottom_left: 0.0,
                },
            },
            text_color,
            shadow: iced::Shadow::default(),
            snap: false,
        })
        .padding([2, 4]);

    row![
        tip(left.into(), "Object Snap: toggle on/off\nF3"),
        tip(right.into(), "Object Snap settings\nClick ▾"),
    ]
    .spacing(0)
    .into()
}

// ── Helpers ───────────────────────────────────────────────────────────────

fn space_tab(label: String, is_active: bool) -> Element<'static, Message> {
    let msg = Message::LayoutSwitch(label.clone());
    button(text(label).size(11))
        .on_press(msg)
        .style(move |_: &Theme, status| button::Style {
            background: Some(Background::Color(match (is_active, status) {
                (true, _) => TAB_ACTIVE,
                (false, button::Status::Hovered) => TAB_HOVER,
                _ => Color::TRANSPARENT,
            })),
            text_color: if is_active {
                Color::WHITE
            } else {
                Color {
                    r: 0.65,
                    g: 0.65,
                    b: 0.65,
                    a: 1.0,
                }
            },
            border: Border {
                color: if is_active {
                    ACCENT
                } else {
                    Color::TRANSPARENT
                },
                width: if is_active { 1.0 } else { 0.0 },
                radius: 2.0.into(),
            },
            shadow: iced::Shadow::default(),
            snap: false,
        })
        .padding([3, 10])
        .into()
}

fn status_pill(label: &str) -> Element<'_, Message> {
    container(text(label).size(10).color(Color {
        r: 0.65,
        g: 0.65,
        b: 0.65,
        a: 1.0,
    }))
    .style(|_: &Theme| container::Style {
        background: Some(Background::Color(PILL_BG)),
        border: Border {
            color: BORDER_COLOR,
            width: 1.0,
            radius: 2.0.into(),
        },
        ..Default::default()
    })
    .padding([2, 6])
    .into()
}

// ── Colours ───────────────────────────────────────────────────────────────

const BAR_BG: Color = Color {
    r: 0.14,
    g: 0.14,
    b: 0.14,
    a: 1.0,
};
const TAB_ACTIVE: Color = Color {
    r: 0.25,
    g: 0.25,
    b: 0.25,
    a: 1.0,
};
const TAB_HOVER: Color = Color {
    r: 0.20,
    g: 0.20,
    b: 0.20,
    a: 1.0,
};
const PILL_BG: Color = Color {
    r: 0.19,
    g: 0.19,
    b: 0.19,
    a: 1.0,
};
const BORDER_COLOR: Color = Color {
    r: 0.28,
    g: 0.28,
    b: 0.28,
    a: 1.0,
};
const ICON_COLOR: Color = Color {
    r: 0.70,
    g: 0.70,
    b: 0.70,
    a: 1.0,
};
const ACCENT: Color = Color {
    r: 0.20,
    g: 0.55,
    b: 0.90,
    a: 1.0,
};

const OSNAP_ON_TEXT: Color = Color {
    r: 0.35,
    g: 0.75,
    b: 1.00,
    a: 1.0,
};
const OSNAP_OFF_TEXT: Color = Color {
    r: 0.42,
    g: 0.42,
    b: 0.42,
    a: 1.0,
};
const SNAP_ON_BG: Color = Color {
    r: 0.10,
    g: 0.20,
    b: 0.32,
    a: 1.0,
};
const SNAP_ON_HOVER: Color = Color {
    r: 0.14,
    g: 0.27,
    b: 0.42,
    a: 1.0,
};
const SNAP_BORDER_ON: Color = Color {
    r: 0.20,
    g: 0.50,
    b: 0.85,
    a: 1.0,
};
const SNAP_OFF_BG: Color = Color {
    r: 0.17,
    g: 0.17,
    b: 0.17,
    a: 1.0,
};
const SNAP_OFF_HOVER: Color = Color {
    r: 0.22,
    g: 0.22,
    b: 0.22,
    a: 1.0,
};