package main

import "core:fmt"
import engine "../zephr"

// A gallery of the M3 components, laid out the way the spec's own catalogue is:
// a scrolling body under the top app bar, a navigation bar pinned to the bottom.

demo_nav_index := 0
demo_switch_a := true
demo_switch_b := false
demo_check_a := true
demo_check_b := false
demo_radio := 0
demo_slider: f32 = 0.4
demo_chip_fav := true
demo_chip_new := false
demo_progress: f32 = 0.65

@(private = "file")
section :: proc(title: string, id: engine.Id) {
    engine.ui_spacer(engine.ui_px(24, 1))
    engine.ui_set_next_font_size(M3_TITLE_SMALL)
    engine.ui_set_next_font_weight(M3_WEIGHT_MEDIUM)
    engine.ui_set_next_text_color(m3.primary)
    engine.ui_text_with_id(title, id)
    engine.ui_spacer(engine.ui_px(12, 1))
}

@(private = "file")
row_begin :: proc(id: engine.Id, caller := #caller_location) {
    engine.ui_set_next_width(engine.ui_fill())
    engine.ui_set_next_height(engine.ui_children_sum(1))
    engine.ui_set_next_align_y(.Center)
    open_row(id, caller)
}

@(private = "file")
gap :: proc() {
    engine.ui_spacer(engine.ui_px(8, 1))
}

m3_demo_screen :: proc() {
    engine.ui_set_next_width(engine.ui_percent(1, 1))
    engine.ui_set_next_height(engine.ui_percent(1, 1))
    engine.ui_set_next_background_color(m3.surface)
    engine.ui_set_next_flags({.DrawBackground})
    engine.ui_column() // pops at the end of this proc

    bar := ui_app_bar({
        title     = "Material 3",
        leading   = ICON_MENU,
        actions   = {ICON_SEARCH, ICON_MORE_VERT},
        top_inset = insets.top,
    })
    if bar.leading_clicked {
        show_toast("menu")
    }
    if bar.action_clicked >= 0 {
        show_toast(bar.action_clicked == 0 ? "search" : "more")
    }

    // Body takes the space between the bar and the nav bar, and scrolls.
    engine.ui_set_next_width(engine.ui_fill())
    engine.ui_set_next_height(engine.ui_fill())
    open_scroll_column(1)
    engine.ui_padding(16, {.Left, .Right})

    // -- Buttons
    section("Common buttons", 100)
    row_begin(101); {
        _ = m3_button("Filled", .Filled, 110)
        gap()
        _ = m3_button("Tonal", .Tonal, 111)
        gap()
        _ = m3_button("Outlined", .Outlined, 112)
        close_box()
    }
    engine.ui_spacer(engine.ui_px(8, 1))
    row_begin(102); {
        _ = m3_button("Elevated", .Elevated, 113)
        gap()
        _ = m3_button("Text", .Text, 114)
        gap()
        _ = m3_button("Disabled", .Filled, 115, false)
        close_box()
    }
    engine.ui_spacer(engine.ui_px(8, 1))
    row_begin(103); {
        if m3_button_icon("Add item", ICON_ADD, .Filled, 116) {
            show_toast("added")
        }
        gap()
        _ = m3_button_icon("Share", ICON_SHARE, .Outlined, 117)
        close_box()
    }

    // -- FABs
    section("FAB", 200)
    row_begin(201); {
        _ = m3_fab(ICON_ADD, .Small, 210)
        gap()
        _ = m3_fab(ICON_EDIT, .Regular, 211)
        gap()
        _ = m3_fab_extended("Compose", ICON_EDIT, 212)
        close_box()
    }

    // -- Chips
    section("Chips", 300)
    row_begin(301); {
        _ = m3_chip_assist("Assist", ICON_STAR, 310)
        gap()
        _ = m3_chip_filter("Favourites", &demo_chip_fav, 311)
        gap()
        _ = m3_chip_filter("New", &demo_chip_new, 312)
        close_box()
    }

    // -- Selection controls
    section("Selection", 400)
    row_begin(401); {
        _ = m3_switch(&demo_switch_a, 410)
        gap()
        _ = m3_switch(&demo_switch_b, 411)
        gap()
        _ = m3_checkbox(&demo_check_a, 412)
        _ = m3_checkbox(&demo_check_b, 413)
        if m3_radio(demo_radio == 0, 414) {
            demo_radio = 0
        }
        if m3_radio(demo_radio == 1, 415) {
            demo_radio = 1
        }
        close_box()
    }

    // -- Slider + progress
    section("Slider", 500)
    _ = m3_slider(&demo_slider, 510)
    engine.ui_set_next_font_size(M3_BODY_SMALL)
    engine.ui_set_next_text_color(m3.on_surface_variant)
    engine.ui_text_with_id(fmt.tprintf("value %.2f", demo_slider), 511)

    section("Progress", 600)
    m3_progress_linear(demo_progress, 610)

    // -- Cards
    section("Cards", 700)
    m3_card_begin(.Elevated, 710); {
        engine.ui_set_next_font_size(M3_TITLE_MEDIUM)
        engine.ui_set_next_font_weight(M3_WEIGHT_MEDIUM)
        engine.ui_set_next_text_color(m3.on_surface)
        engine.ui_text_with_id("Elevated card", 711)
        engine.ui_spacer(engine.ui_px(4, 1))
        engine.ui_set_next_font_size(M3_BODY_MEDIUM)
        engine.ui_set_next_text_color(m3.on_surface_variant)
        engine.ui_text_with_id("surfaceContainerLow", 712)
        m3_card_end()
    }
    engine.ui_spacer(engine.ui_px(8, 1))
    m3_card_begin(.Filled, 720); {
        engine.ui_set_next_font_size(M3_TITLE_MEDIUM)
        engine.ui_set_next_font_weight(M3_WEIGHT_MEDIUM)
        engine.ui_set_next_text_color(m3.on_surface)
        engine.ui_text_with_id("Filled card", 721)
        m3_card_end()
    }
    engine.ui_spacer(engine.ui_px(8, 1))
    m3_card_begin(.Outlined, 730); {
        engine.ui_set_next_font_size(M3_TITLE_MEDIUM)
        engine.ui_set_next_font_weight(M3_WEIGHT_MEDIUM)
        engine.ui_set_next_text_color(m3.on_surface)
        engine.ui_text_with_id("Outlined card", 731)
        m3_card_end()
    }

    // -- Lists
    section("List", 800)
    if m3_list_item("Notifications", ICON_NOTIFICATIONS, "12", 810) {
        show_toast("notifications")
    }
    m3_divider(811)
    if m3_list_item("Bookmarks", ICON_BOOKMARK, "", 812) {
        show_toast("bookmarks")
    }
    m3_divider(813)
    if m3_list_item("Settings", ICON_SETTINGS, "", 814) {
        show_toast("settings")
    }

    // -- Snackbar
    section("Snackbar", 900)
    if m3_snackbar("Item moved to trash", "Undo", 910) {
        show_toast("undo")
    }

    engine.ui_spacer(engine.ui_px(24, 1))

    // Close the scroll body so the nav bar is a sibling of it, not content
    // inside it -- that is what keeps it pinned to the bottom.
    close_box()

    items := []M3_Nav_Item{
        {ICON_HOME, "Home"},
        {ICON_FAVORITE, "Saved"},
        {ICON_PERSON, "Profile"},
    }
    if m3_nav_bar(items, &demo_nav_index, insets.bottom, 1000) {
        show_toast(items[demo_nav_index].label)
    }
}