--[[
@module  tsb_bmq_page
@summary 编码器演示页面
@version 1.0
@date    2026.03.04
@author  李一玮
@usage
本文件是编码器演示页面，展示编码器的各种用法。
]]

local tsb_bmq_page = {}

-- 页面UI元素
local main_container = nil
local common_ui = require("tsb_common_page")

local label_cur_vol = nil
local label_pulse_count = nil

-- GPIO检测配置
local DETECT_PIN = 31  -- 检测引脚：GPIO31
local pulse_count = 0  -- 脉冲计数
local level_check_timer = nil  -- 电平检查定时器

-- 电平中断回调函数（检测到高→低跳变时执行）
local function pin_interrupt_callback()
    -- 低电平时计数（下降沿）
    if label_pulse_count then
        pulse_count = pulse_count + 1
        label_pulse_count:set_text(tostring(pulse_count))
        --log.info("bmq", "检测到下降沿，脉冲数:", pulse_count)
    end
end

-- 周期性检查电平状态（用于更新显示）
local function check_level_status()
    if label_cur_vol then
        local level = gpio.get(DETECT_PIN)
        label_cur_vol:set_text(level == 1 and "高" or "低")
    end
end

-- 创建UI
function tsb_bmq_page.create_ui()
    main_container = airui.container({
        x = 0,
        y = 0,
        w = 480,
        h = 320,
        color = 0xF5F5F5,
    })

    --------------------- 标题栏 ------------------------
    local title_bar = airui.container({
        parent = main_container,
        x = 0,
        y = 0,
        w = 480,
        h = 30,
        color = 0xFF9800,
    })

    airui.label({
        parent = title_bar,
        text = "编码器",
        x = 210,
        y = 8,
        w = 80,
        h = 20,
        font_size = 16,
        color = 0xFFFFFF,
    })
    
    -- 标题栏公共信息展示
    common_ui.add_battery_display(title_bar)
    common_ui.create_back_button(title_bar, tsb_bmq_page.cleanup)
    ---------------------------------------------------

    -- 滚动容器
    local scroll_container = airui.container({
        parent = main_container,
        x = 0,
        y = 30,
        w = 480,
        h = 270,
        color = 0xF5F5F5,
    })

    local keyboard1 = airui.keyboard({
        x = 0,
        y = 0,
        w = 480,
        h = 160,                        -- x, y, 键盘默认打开ALIGN_BOTTOM_MID，位置从中下方开始计算
        mode = "numeric",               -- 键盘模式，可选 "text"/"upper"/"lower"/"numeric"
        preview = true,          
        preview_height = 35,
        auto_hide = true,               -- 自动隐藏键盘
        bg_color = 0xf1f1f1,            -- 键盘背景颜色为灰色，可选，不设置则透明
        on_commit = function()          -- 确认事件回调，只有在按下确认键时才会触发
            log.info("keyboard", "commit")
        end
    })

    ------------------- 模拟编码器输入 ------------------
    local bmq_input_container = airui.container({
        parent = scroll_container,
        x = 10,
        y = 5,
        w = 200,
        h = 260,
        color = 0xFFFFFF,
        radius = 5,
    })

    airui.label({
        parent = bmq_input_container,
        text = "编码器信号输入",
        x = 35,
        y = 10,
        w = 140,
        h = 30,
        font_size = 18,
    })

    airui.label({
        parent = bmq_input_container,
        text = "实时电平：",
        x = 20,
        y = 80,
        w = 80,
        h = 30,
        font_size = 16,
    })

    label_cur_vol = airui.label({
        parent = bmq_input_container,
        text = "高",
        x = 100,
        y = 80,
        w = 80,
        h = 30,
        font_size = 16,
    })

    airui.label({
        parent = bmq_input_container,
        text = "检测脉冲数：",
        x = 20,
        y = 140,
        w = 100,
        h = 30,
        font_size = 16,
    })

    label_pulse_count = airui.label({
        parent = bmq_input_container,
        text = "12345",
        x = 120,
        y = 140,
        w = 70,
        h = 30,
        font_size = 16,
    })

    local tax_serial_btn = airui.button({
        parent = bmq_input_container,
        x = 65,
        y = 215,
        w = 80,
        h = 35,
        text = "清零",
        on_click = function(self)
            log.info("button", "清零按钮被点击")
            pulse_count = 0
            label_pulse_count:set_text("0")
        end
    })

    ----------------------------------------------------

    ------------------- 模拟编码器输出 ------------------
    local bmq_output_container = airui.container({
        parent = scroll_container,
        x = 220,
        y = 5,
        w = 250,
        h = 260,
        color = 0xFFFFFF,
        radius = 5,
    })

    airui.label({
        parent = bmq_output_container,
        text = "编码器信号输出",
        x = 60,
        y = 10,
        w = 140,
        h = 30,
        font_size = 18,
    })

    -- 脉冲周期
    airui.label({
        parent = bmq_output_container,
        text = "脉冲周期：",
        x = 20,
        y = 50,
        w = 80,
        h = 30,
        font_size = 16,
    })

    local cycle_input = airui.textarea({
        parent = bmq_output_container,
        x = 100,
        y = 40,
        w = 60,
        h = 35,
        text = "5",
        max_len = 5,
        keyboard = keyboard1
    })

    airui.label({
        parent = bmq_output_container,
        text = "ms",
        x = 165,
        y = 50,
        w = 30,
        h = 30,
        font_size = 16,
    })

    -- 电压幅度
    airui.label({
        parent = bmq_output_container,
        text = "电压幅度：",
        x = 20,
        y = 90,
        w = 80,
        h = 30,
        font_size = 16,
    })

    local voltage_input = airui.textarea({
        parent = bmq_output_container,
        x = 100,
        y = 80,
        w = 60,
        h = 35,
        text = "5",
        max_len = 2,
        keyboard = keyboard1
    })

    airui.label({
        parent = bmq_output_container,
        text = "V",
        x = 170,
        y = 90,
        w = 30,
        h = 30,
        font_size = 16,
    })

    -- 当前电平
    airui.label({
        parent = bmq_output_container,
        text = "当前电平：",
        x = 20,
        y = 130,
        w = 80,
        h = 30,
        font_size = 16,
    })

    local label_output_level = airui.label({
        parent = bmq_output_container,
        text = "高",
        x = 100,
        y = 130,
        w = 80,
        h = 30,
        font_size = 16,
    })

    -- 输出脉冲数
    airui.label({
        parent = bmq_output_container,
        text = "输出脉冲数：",
        x = 20,
        y = 170,
        w = 100,
        h = 30,
        font_size = 16,
    })

    local label_output_pulse = airui.label({
        parent = bmq_output_container,
        text = "0",
        x = 120,
        y = 170,
        w = 80,
        h = 30,
        font_size = 16,
    })

    -- 按钮
    local start_btn = airui.button({
        parent = bmq_output_container,
        x = 40,
        y = 215,
        w = 80,
        h = 35,
        text = "开始",
        style = { bg_color = 0x2B6FF1,border_color = 0x2B6FF1, text_color = 0xFFFFFF, radius = 8 },
        on_click = function(self)
            log.info("button", "开始按钮被点击")
        end
    })

    local clear_btn = airui.button({
        parent = bmq_output_container,
        x = 130,
        y = 215,
        w = 80,
        h = 35,
        text = "清零",
        on_click = function(self)
            log.info("button", "清零按钮被点击")
        end
    })
    ----------------------------------------------------
    -- 底部信息
    common_ui.create_status_bar(main_container)
end

-- 初始化GPIO检测
local function init_gpio_detect()
    -- 配置为下降沿中断检测
    gpio.setup(DETECT_PIN, pin_interrupt_callback, gpio.PULLDOWN, gpio.FALLING)
    log.info("bmq", "GPIO初始化完成，引脚:", DETECT_PIN)
    
    -- 初始化显示当前电平
    local level = gpio.get(DETECT_PIN)
    if label_cur_vol then
        label_cur_vol:set_text(level == 1 and "高" or "低")
    end
    if label_pulse_count then
        label_pulse_count:set_text("0")
    end
    
    -- 启动周期性电平检查定时器（每50ms检查一次）
    level_check_timer = sys.timerLoopStart(check_level_status, 2)
    log.info("bmq", "电平检查定时器已启动")
end

-- 初始化页面
function tsb_bmq_page.init(params)
    tsb_bmq_page.create_ui()
    -- 初始化GPIO检测
    init_gpio_detect()
end

-- 清理页面
function tsb_bmq_page.cleanup()
    -- 停止电平检查定时器
    if level_check_timer then
        sys.timerStop(level_check_timer)
        level_check_timer = nil
        log.info("bmq", "电平检查定时器已停止")
    end
    
    -- 释放GPIO资源
    gpio.setup(DETECT_PIN, nil)
    log.info("bmq", "GPIO资源已释放")
    
    if main_container then
        main_container:destroy()
        main_container = nil
    end
end

return tsb_bmq_page