use crate::core::config::AppConfig;
use serde::{Deserialize, Serialize};

/// 消息信封：包含来源、目的地、消息体
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Envelope {
    pub from: String,
    pub to: Destination,
    pub message: Message,
}

/// 消息目的地
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum Destination {
    /// 点对点发送给指定插件
    Plugin(String),
    /// 广播给所有插件
    Broadcast,
    /// 发给管理层自身
    Manager,
}

/// 所有插件间通信的类型安全消息
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum Message {
    // ── 播放控制 ──
    PlayerCommand(PlayerCommand),
    PlayerStatus(PlayerStatusData),
    Trigger {
        name: String,
        value: String,
    },
    StateChanged {
        old_state: String,
        new_state: String,
    },

    // ── 屏幕管理 ──
    ScreenLockRequest(bool),
    CursorVisibility(bool),

    // ── 网络 ──
    WifiCommand(WifiCommand),
    WifiResult(String),
    WifiProvisioned {
        ssid: String,
        ip: String,
    },

    // ── 配置 ──
    /// 配置重载广播需要经过 JSON/FFI 路径，因此这里保存可序列化的 AppConfig。
    ConfigReloaded(AppConfig),
    ConfigReloadRequest,

    // ── 系统 ──
    Shutdown,
    PluginReady(String),

    // ── 设备管理 ──
    DeviceCommand(DeviceCommand),
    DeviceResponse(DeviceResponse),
    DeviceEvent(DeviceEvent),

    // ── 扩展（未来插件用） ──
    Custom {
        kind: String,
        payload: String,
    },
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum PlayerCommand {
    Play,
    Pause,
    Next,
    Previous,
    Goto(usize),
    ChangeScene(String),
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct PlayerStatusData {
    pub running: bool,
    pub paused: bool,
    pub in_transition: bool,
    pub current_index: usize,
    pub playlist_length: usize,
    pub current_video: Option<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum WifiCommand {
    Scan,
    Connect { ssid: String, password: String },
    Status,
    ApStart { ssid: String, password: String },
    ApStop,
}

// ── 设备管理 ──

/// 像素格式
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum PixelFormat {
    /// RGBA 8888 格式（每像素 4 字节）
    RGBA8888,
    /// RGB 888 格式（每像素 3 字节）
    RGB888,
    /// RGB 565 格式（每像素 2 字节）
    RGB565,
}

/// 传感器类型
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum SensorType {
    /// 温度传感器
    Temperature,
    /// 湿度传感器
    Humidity,
    /// 光线传感器
    Light,
    /// 接近传感器
    Proximity,
}

/// 触摸动作
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum TouchAction {
    /// 按下
    Down,
    /// 移动
    Move,
    /// 抬起
    Up,
}

/// 设备能力
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum DeviceCapability {
    /// 显示屏
    Display,
    /// 触摸屏
    Touch,
    /// 按钮
    Buttons,
    /// 音频
    Audio,
    /// 电池
    Battery,
    /// 背光
    Backlight,
    /// 传感器
    Sensors,
    /// 帧缓冲
    Framebuffer,
    /// GPIO
    GPIO,
}

/// 设备命令（业务插件 → DevicePlugin）
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum DeviceCommand {
    /// 获取显示信息
    GetDisplayInfo,
    /// 设置亮度（0-100）
    SetBrightness(u8),
    /// 设置背光开关
    SetBacklight(bool),
    /// 写入帧缓冲
    WriteFramebuffer { data: Vec<u8>, format: PixelFormat },
    /// 设置防息屏
    SetSleepInhibit(bool),
    /// 获取电池电量
    GetBatteryLevel,
    /// 设置音量（0-100）
    SetVolume(u8),
    /// 播放音频
    PlayAudio { path: String },
    /// 获取触摸事件
    GetTouchEvents,
    /// 获取按钮状态
    GetButtonState,
    /// 获取传感器数据
    GetSensorData(SensorType),
    /// 自定义命令
    CustomCommand {
        subsystem: String,
        payload: serde_json::Value,
    },
}

/// 设备响应（DevicePlugin → 请求者）
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum DeviceResponse {
    /// 显示信息
    DisplayInfo {
        width: u32,
        height: u32,
        format: PixelFormat,
    },
    /// 传感器数据
    SensorData { sensor: SensorType, value: f64 },
    /// 电池电量（0-100）
    BatteryLevel(u8),
    /// 操作成功
    Ok,
    /// 操作失败
    Error(String),
    /// 自定义响应
    Custom(serde_json::Value),
}

/// 设备事件（DevicePlugin → 广播）
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum DeviceEvent {
    /// 触摸事件
    TouchEvent { x: i32, y: i32, action: TouchAction },
    /// 按钮事件
    ButtonEvent { button: u8, pressed: bool },
    /// 电池电量低
    BatteryLow(u8),
    /// 显示器已连接
    DisplayConnected,
    /// 显示器已断开
    DisplayDisconnected,
    /// 传感器警报
    SensorAlert { sensor: SensorType, value: f64 },
}