#include "bike.h"

static lv_obj_t* container = NULL;

static lv_theme_t* theme_original;
static const uint32_t bg_color = 0x040507;
static int32_t battery_percent = 15;

static lv_obj_t* battery_indicator = NULL;
static lv_obj_t* battery_label = NULL;

static void update_battery_indicator() {
    lv_label_set_text_fmt(battery_label, "%d%%", battery_percent);
    lv_obj_set_width(battery_indicator, lv_pct(max(battery_percent, 10)));
    if (battery_percent >= 60) {
        lv_obj_set_style_bg_color(battery_indicator, lv_color_hex(0x00ff00), 0);
    }
    else if (battery_percent >= 20) {
        lv_obj_set_style_bg_color(battery_indicator, lv_color_hex(0xffff00), 0);
    }
    else {
        lv_obj_set_style_bg_color(battery_indicator, lv_color_hex(0xff0000), 0);
    }
}

static void battery_timer_cb(lv_timer_t* timer) {
    battery_percent -= 1;
    if (battery_percent < 0)
    {
        battery_percent = 100;
    }
    update_battery_indicator();

}

static void create_header() {
    //header
    lv_obj_t* header = lv_obj_create(container);
    lv_obj_set_size(header, lv_pct(100), 30);
    lv_obj_set_style_bg_color(header, lv_color_hex(bg_color), 0);
    lv_obj_set_style_border_side(header, LV_BORDER_SIDE_BOTTOM, 0);
    lv_obj_set_flex_align(header, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
    lv_obj_set_layout(header, LV_LAYOUT_FLEX);
    lv_obj_set_flex_flow(header, LV_FLEX_FLOW_ROW);
    lv_obj_set_style_pad_all(header, 4, 0);
    lv_obj_set_style_border_color(header, lv_color_hex(0x191B1D), 0);
    lv_obj_set_style_border_width(header, 1, 0);

    //time
    lv_obj_t* time_bar = lv_label_create(header);
    lv_obj_set_style_bg_color(time_bar, lv_color_hex(bg_color), 0);
    lv_label_set_text(time_bar, "12:35");
    lv_obj_set_style_text_color(time_bar, lv_color_hex(0xffffff), 0);

    //gap
    lv_obj_t* gap_bar = lv_obj_create(header);
    lv_obj_set_size(gap_bar, LV_SIZE_CONTENT, lv_pct(100));
    lv_obj_set_flex_grow(gap_bar, 1);
    lv_obj_set_style_bg_color(gap_bar, lv_color_hex(bg_color), 0);

    //battery
    //icon
    LV_IMG_DECLARE(battery);
    lv_obj_t* battery_container = lv_obj_create(header);
    lv_obj_set_style_bg_img_src(battery_container, &battery, 0);
    lv_obj_set_size(battery_container, 26, 16);
    lv_obj_set_style_margin_right(battery_container, 4, 0);

    lv_obj_set_style_pad_all(battery_container, 2, 0);
    lv_obj_set_style_pad_left(battery_container, 3, 0);
    lv_obj_set_style_pad_right(battery_container, 6, 0);

    battery_indicator = lv_obj_create(battery_container);
    lv_obj_set_size(battery_indicator, lv_pct(battery_percent), lv_pct(90));
    lv_obj_set_style_radius(battery_indicator, 2, 0);
    lv_obj_set_align(battery_indicator, LV_ALIGN_LEFT_MID);


    battery_label = lv_label_create(header);
    lv_obj_set_style_bg_color(battery_label, lv_color_hex(bg_color), 0);
    lv_obj_set_size(battery_label, 40, LV_SIZE_CONTENT);
    lv_obj_set_style_text_color(battery_label, lv_color_hex(0xffffff), 0);

    update_battery_indicator();

    lv_obj_t* timer = lv_timer_create(battery_timer_cb, 3 * 1000, NULL);
}

static void speed_arc_value_changed(lv_event_t* event) {
    lv_obj_t* arc = lv_event_get_target(event);

    int32_t value = lv_arc_get_value(arc);

    lv_obj_t* label = (lv_obj_t*)lv_event_get_user_data(event);
    lv_label_set_text_fmt(label, "%0.1f", value * 90.0 / 100.0);

}

static void create_speedmeter(lv_obj_t* parent) {
    lv_obj_update_layout(parent);
    lv_obj_t* arc = lv_arc_create(parent);
    lv_coord_t size = LV_MIN(
        lv_obj_get_width(parent),
        lv_obj_get_height(parent)
    ) * 0.8;
    lv_obj_set_size(arc, size, size);
    lv_obj_remove_style(arc, NULL, LV_PART_KNOB);
    lv_obj_set_style_arc_color(arc, lv_color_hex(0x367BF1), LV_PART_INDICATOR);
    lv_obj_set_style_arc_color(arc, lv_color_hex(0x21242A), LV_PART_MAIN);
    lv_obj_set_style_arc_width(arc, 12, LV_PART_INDICATOR);
    lv_obj_set_style_arc_width(arc, 12, LV_PART_MAIN);
    lv_obj_center(arc);
    lv_obj_update_layout(arc);
    

    //速度标签
    lv_obj_t* speed_label = lv_label_create(parent);
    lv_obj_set_align(speed_label, LV_ALIGN_CENTER);
    lv_label_set_text(speed_label, "0.0");
    LV_FONT_DECLARE(lv_font_din_28);
    lv_obj_set_style_text_font(speed_label, &lv_font_din_28, 0);
    lv_obj_set_style_text_color(speed_label, lv_color_hex(0xffffff), 0);

    lv_obj_t* speed_unit_label = lv_label_create(parent);
    lv_obj_align(speed_unit_label, LV_ALIGN_CENTER, 0, 20);
    lv_label_set_text(speed_unit_label, "km/h");
    lv_obj_set_style_text_color(speed_unit_label, lv_color_hex(0xffffff), 0);

    lv_obj_add_event_cb(arc, speed_arc_value_changed, LV_EVENT_VALUE_CHANGED, speed_label);
    lv_arc_set_value(arc, 0);

    // 获取角度范围
    int32_t start_angle = lv_arc_get_bg_angle_start(arc);
    int32_t end_angle = lv_arc_get_bg_angle_end(arc);

    int32_t angle_range = (end_angle >= start_angle)
        ? (end_angle - start_angle)
        : (360 - start_angle + end_angle);

    // 获取中心点
    lv_coord_t cx = lv_obj_get_width(arc) / 2;
    lv_coord_t cy = lv_obj_get_height(arc) / 2;

    // 半径（用中心半径更准）
    lv_coord_t radius = LV_MIN(lv_obj_get_width(arc), lv_obj_get_height(arc)) / 2;


    // 画刻度
    int max_speed = 90;
    static lv_point_precise_t line_points[(90 / 5 + 1) * 2] = { {0,0} };
    for (int speed = 0; speed <= max_speed; speed += 5) {

        int32_t angle = start_angle + (angle_range * speed) / max_speed;
        if (angle >= 360) angle -= 360;

        int32_t cos_v = lv_trigo_cos(angle);
        int32_t sin_v = lv_trigo_sin(angle);

        lv_obj_t* line = lv_line_create(arc);

        lv_coord_t inner_r = radius;   // 刻度内侧
        lv_coord_t outer_r = radius;    // 刻度外侧

        // 粗细区分（10为大刻度）
        if (speed % 10 == 0) {
            lv_obj_set_style_line_width(line, 3, 0);
            inner_r -= 20;
            if (speed != 0 && speed != max_speed)
            {
                outer_r -= 13;
            }
            lv_obj_set_style_line_color(line, lv_color_hex(0xffffff), 0);
        }
        else {
            lv_obj_set_style_line_width(line, 2, 0);
            outer_r -= 14;
            inner_r -= 18;
            lv_obj_set_style_line_color(line, lv_color_hex(0x21242A), 0);
        }

        // 起点
        lv_point_precise_t* p = line_points + (speed / 5) * 2;
        p[0].x = cx + (inner_r * cos_v) / 32767;
        p[0].y = cy + (inner_r * sin_v) / 32767;

        // 终点
        p[1].x = cx + (outer_r * cos_v) / 32767;
        p[1].y = cy + (outer_r * sin_v) / 32767;

        if (speed % 10 == 0) {
            lv_coord_t text_r = inner_r - 15;

            lv_coord_t label_x = cx + (text_r * cos_v) / 32767;
            lv_coord_t label_y = cy + (text_r * sin_v) / 32767;
            lv_obj_t* label = lv_label_create(arc);
            lv_label_set_text_fmt(label, "%d", speed);
            lv_obj_update_layout(label);
            lv_obj_set_style_text_color(label, lv_color_hex(0xffffff), 0);
            lv_obj_set_pos(label, label_x - lv_obj_get_width(label) / 2, label_y - lv_obj_get_height(label) / 2);
        }

        lv_line_set_points(line, p, 2);
    }
}

void bike_init(lv_obj_t* parent) {
    //assert(container == NULL);

    lv_display_t* display = lv_display_get_default();
    theme_original = lv_display_get_theme(display);
    lv_theme_t* theme = lv_theme_simple_init(display);
    lv_display_set_theme(display, theme);

    container = lv_obj_create(parent);
    lv_obj_set_size(container, lv_pct(100), lv_pct(100));
    lv_obj_align(container, LV_ALIGN_CENTER, 0, 0);
    lv_obj_set_flex_flow(container, LV_FLEX_FLOW_COLUMN);
    lv_obj_set_layout(container, LV_LAYOUT_FLEX);
    lv_obj_set_style_bg_color(container, lv_color_hex(bg_color), 0);


    create_header();

    //内容
    lv_obj_t* content = lv_obj_create(container);
    lv_obj_set_size(content, lv_pct(100), LV_SIZE_CONTENT);
    lv_obj_set_layout(content, LV_LAYOUT_FLEX);
    lv_obj_set_flex_flow(content, LV_FLEX_FLOW_ROW);

    lv_obj_set_style_bg_color(content, lv_color_hex(bg_color), 0);
    lv_obj_set_style_margin_top(content, 5, 0);
    lv_obj_set_flex_grow(content, 1);

    //码表
    lv_obj_t* speedmeter_container = lv_obj_create(content);
    lv_obj_set_size(speedmeter_container, lv_pct(60), lv_pct(100));
    lv_obj_set_style_bg_color(speedmeter_container, lv_color_hex(bg_color), 0);
    create_speedmeter(speedmeter_container);


    //底部
    lv_obj_t* footer = lv_obj_create(container);
    lv_obj_set_size(footer, lv_pct(100), 30);
    lv_obj_set_style_bg_color(footer, lv_color_hex(bg_color), 0);
    lv_obj_set_style_margin_top(footer, 5, 0);
    lv_obj_set_style_border_side(footer, LV_BORDER_SIDE_FULL, 0);
    lv_obj_set_style_border_color(footer, lv_color_hex(0x191B1D), 0);
    lv_obj_set_style_border_width(footer, 1, 0);

}

void bike_deinit() {
    if (container) {
        lv_obj_delete(container);
        container = NULL;
    }
}