use crate::core::config::AppConfig;
use crate::core::message::{Destination, Envelope, Message};
use crate::core::plugin::{CapabilityTestResult, Plugin, PluginContext};
use crate::core::plugin_loader::{ErrorPolicy, PluginLoader, PluginRegistryEntry};
use crate::core::plugin_repo::PluginRepository;
use crate::core::version_manager::VersionManager;
use anyhow::{anyhow, Result};
use serde::Deserialize;
use std::collections::{HashMap, HashSet};
use std::sync::{mpsc, Arc};

const DEFAULT_PLUGIN_REPO_URL: &str = "https://plugins.example.com";

#[derive(Deserialize)]
struct PluginSwitchCommand {
    id: String,
    version: String,
}

#[derive(Deserialize)]
struct PluginInstallCommand {
    id: String,
    #[serde(default)]
    version: Option<String>,
}

/// 插件运行时状态包装
struct PluginState {
    plugin: Box<dyn Plugin>,
    /// 是否为动态加载的插件
    is_dynamic: bool,
    /// 错误处理策略
    error_policy: ErrorPolicy,
    /// 连续错误计数
    error_count: u32,
    /// 最大允许错误数
    max_errors: u32,
    /// 是否启用
    enabled: bool,
    /// 挂载时的自测结果
    test_results: Vec<CapabilityTestResult>,
    /// 声明的功能列表
    capabilities: Vec<String>,
    /// manifest 中声明的必须通过的功能
    required_capabilities: Vec<String>,
    /// 是否自动测试
    auto_test: bool,
    /// 是否需要在后续生命周期中执行回退
    needs_rollback: bool,
}

impl PluginState {
    fn new_static(plugin: Box<dyn Plugin>) -> Self {
        Self {
            plugin,
            is_dynamic: false,
            error_policy: ErrorPolicy::DisableAndLog,
            error_count: 0,
            max_errors: u32::MAX, // 静态插件不自动禁用
            enabled: true,
            test_results: vec![],
            capabilities: vec![],
            required_capabilities: vec![],
            auto_test: false, // 静态插件默认不自测
            needs_rollback: false,
        }
    }

    fn new_dynamic(plugin: Box<dyn Plugin>, error_policy: ErrorPolicy, max_errors: u32) -> Self {
        Self {
            plugin,
            is_dynamic: true,
            error_policy,
            error_count: 0,
            max_errors,
            enabled: true,
            test_results: vec![],
            capabilities: vec![],
            required_capabilities: vec![],
            auto_test: true,
            needs_rollback: false,
        }
    }

    fn id(&self) -> &str {
        self.plugin.id()
    }

    /// 记录一次错误，返回是否超过阈值
    fn record_error(&mut self) -> bool {
        self.error_count += 1;
        self.error_count >= self.max_errors
    }

    /// 重置错误计数（成功处理消息后调用）
    fn reset_errors(&mut self) {
        self.error_count = 0;
    }
}

/// 中央调度器：插件注册、生命周期管理、消息路由
pub struct ServiceManager {
    plugins: Vec<PluginState>,
    config: Arc<AppConfig>,
    tx: mpsc::Sender<Envelope>,
    rx: mpsc::Receiver<Envelope>,
    running: bool,
    version_manager: Option<VersionManager>,
}

impl ServiceManager {
    fn plugin_context(&self) -> PluginContext {
        PluginContext {
            tx: self.tx.clone(),
            config: Arc::clone(&self.config),
        }
    }

    fn init_and_start_plugin_with_context(
        state: &mut PluginState,
        ctx: PluginContext,
    ) -> Result<()> {
        if let Err(init_error) = state.plugin.init(ctx) {
            let cleanup_error = state.plugin.stop().err();
            return match cleanup_error {
                Some(stop_error) => Err(anyhow!(
                    "plugin '{}' init failed: {}; cleanup stop failed: {}",
                    state.id(),
                    init_error,
                    stop_error
                )),
                None => Err(init_error),
            };
        }

        if let Err(start_error) = state.plugin.start() {
            let cleanup_error = state.plugin.stop().err();
            return match cleanup_error {
                Some(stop_error) => Err(anyhow!(
                    "plugin '{}' start failed: {}; cleanup stop failed: {}",
                    state.id(),
                    start_error,
                    stop_error
                )),
                None => Err(start_error),
            };
        }

        Ok(())
    }

    pub fn new(config: AppConfig) -> Self {
        let (tx, rx) = mpsc::channel();
        Self {
            plugins: Vec::new(),
            config: Arc::new(config),
            tx,
            rx,
            running: false,
            version_manager: None,
        }
    }

    pub fn set_version_manager(&mut self, version_manager: VersionManager) {
        self.version_manager = Some(version_manager);
    }

    /// 注册静态插件（编译时链接的插件）
    pub fn register(&mut self, plugin: Box<dyn Plugin>) {
        println!("[ServiceManager] 注册插件: {}", plugin.id());
        self.plugins.push(PluginState::new_static(plugin));
    }

    /// 注册动态插件（运行时加载的 .so 插件）
    pub fn register_dynamic(
        &mut self,
        plugin: Box<dyn Plugin>,
        error_policy: ErrorPolicy,
        max_errors: u32,
    ) {
        self.register_dynamic_with_manifest(plugin, error_policy, max_errors, vec![], vec![], true);
    }

    /// 注册动态插件（带 manifest 自测信息）
    pub fn register_dynamic_with_manifest(
        &mut self,
        plugin: Box<dyn Plugin>,
        error_policy: ErrorPolicy,
        max_errors: u32,
        required_capabilities: Vec<String>,
        capabilities: Vec<String>,
        auto_test: bool,
    ) {
        println!(
            "[ServiceManager] 注册动态插件: {} (策略: {:?}, 最大错误: {})",
            plugin.id(),
            error_policy,
            max_errors
        );
        let mut state = PluginState::new_dynamic(plugin, error_policy, max_errors);
        state.required_capabilities = required_capabilities;
        state.capabilities = capabilities;
        state.auto_test = auto_test;
        self.plugins.push(state);
    }

    /// 按注册顺序 init() → self_test() → start() 所有插件
    /// 动态插件 init/start/test 失败时按策略处理，不中断其他插件
    pub fn start_all(&mut self) -> Result<()> {
        self.validate_and_sort_plugins()?;

        // Phase 1: init
        for state in &mut self.plugins {
            let ctx = PluginContext {
                tx: self.tx.clone(),
                config: Arc::clone(&self.config),
            };
            println!("[ServiceManager] 初始化插件: {}", state.id());
            if let Err(e) = state.plugin.init(ctx) {
                if state.is_dynamic {
                    eprintln!(
                        "[ServiceManager] 动态插件 '{}' 初始化失败，禁用: {}",
                        state.id(),
                        e
                    );
                    state.enabled = false;
                    continue;
                } else {
                    return Err(e);
                }
            }
        }

        // Phase 2: self_test (init 之后, start 之前)
        for state in &mut self.plugins {
            if !state.enabled || !state.auto_test {
                continue;
            }

            // 获取插件的功能列表并运行自测
            let caps = state.plugin.capabilities();
            if caps.is_empty() && state.required_capabilities.is_empty() {
                // 无功能声明 → 跳过自测
                continue;
            }

            println!(
                "[ServiceManager] 自测插件: {} (功能: {:?})",
                state.id(),
                caps
            );
            state.capabilities = caps;
            let results = state.plugin.self_test();

            // 检查 required_capabilities 中的项是否全部通过
            let mut has_required_failure = false;
            let passed_caps: std::collections::HashSet<&str> = results
                .iter()
                .filter(|r| r.passed)
                .map(|r| r.capability.as_str())
                .collect();

            // 检查每个 required capability 是否出现在通过列表中
            for req in &state.required_capabilities {
                if !passed_caps.contains(req.as_str()) {
                    eprintln!(
                        "[ServiceManager]   ✗ [必须] {} — {}",
                        req,
                        results
                            .iter()
                            .find(|r| r.capability == *req)
                            .map(|r| r.message.as_str())
                            .unwrap_or("未在测试结果中出现")
                    );
                    has_required_failure = true;
                }
            }

            for result in &results {
                if result.passed {
                    println!(
                        "[ServiceManager]   ✓ {} — {}",
                        result.capability, result.message
                    );
                } else if !state.required_capabilities.contains(&result.capability) {
                    eprintln!(
                        "[ServiceManager]   ✗ [可选] {} — {}",
                        result.capability, result.message
                    );
                }
            }

            state.test_results = results;

            if has_required_failure {
                if state.is_dynamic {
                    match &state.error_policy {
                        ErrorPolicy::AutoRollback => {
                            eprintln!(
                                "[ServiceManager] 动态插件 '{}' 必须能力自测失败，尝试自动回退到稳定版本",
                                state.id()
                            );
                            state.needs_rollback = true;
                        }
                        ErrorPolicy::DisableAndLog => {
                            eprintln!(
                                "[ServiceManager] 动态插件 '{}' 必须能力自测失败，禁用",
                                state.id()
                            );
                            state.needs_rollback = false;
                        }
                    }
                    state.enabled = false;
                } else {
                    return Err(anyhow!("静态插件 '{}' 必须能力自测失败", state.id()));
                }
            }
        }

        for idx in 0..self.plugins.len() {
            if !self.plugins[idx].needs_rollback {
                continue;
            }

            let plugin_id = self.plugins[idx].id().to_string();
            self.rollback_dynamic_plugin(idx, &plugin_id);
        }

        // Phase 3: start
        for state in &mut self.plugins {
            if !state.enabled {
                continue;
            }
            println!("[ServiceManager] 启动插件: {}", state.id());
            if let Err(e) = state.plugin.start() {
                if state.is_dynamic {
                    eprintln!(
                        "[ServiceManager] 动态插件 '{}' 启动失败，禁用: {}",
                        state.id(),
                        e
                    );
                    state.enabled = false;
                    continue;
                } else {
                    return Err(e);
                }
            }
        }

        self.broadcast_plugin_states();

        Ok(())
    }

    /// 主消息循环（阻塞）
    pub fn run(&mut self) -> Result<()> {
        println!("[ServiceManager] 进入主消息循环");
        self.running = true;

        while self.running {
            let envelope = match self.rx.recv() {
                Ok(env) => env,
                Err(_) => {
                    println!("[ServiceManager] 所有发送端已关闭，退出");
                    break;
                }
            };

            match envelope.to {
                Destination::Plugin(id) => {
                    self.deliver_to_plugin(&id, envelope.message);
                }
                Destination::Broadcast => {
                    self.broadcast_message(envelope.message);
                }
                Destination::Manager => {
                    self.handle_manager_message(envelope.message)?;
                }
            }
        }

        self.stop_all()
    }

    /// 逆序 stop() 所有插件
    pub fn stop_all(&mut self) -> Result<()> {
        println!("[ServiceManager] 停止所有插件");
        for state in self.plugins.iter_mut().rev() {
            if !state.enabled {
                continue;
            }
            println!("[ServiceManager] 停止插件: {}", state.id());
            if let Err(e) = state.plugin.stop() {
                eprintln!("[ServiceManager] 停止插件 '{}' 失败: {}", state.id(), e);
            }
        }
        Ok(())
    }

    /// 启用/禁用指定插件
    pub fn set_plugin_enabled(&mut self, plugin_id: &str, enabled: bool) -> Result<()> {
        let idx = self
            .plugins
            .iter()
            .position(|s| s.id() == plugin_id)
            .ok_or_else(|| anyhow!("plugin '{plugin_id}' not found"))?;

        if enabled && !self.plugins[idx].enabled {
            let ctx = self.plugin_context();
            let state = &mut self.plugins[idx];
            state.error_count = 0;
            match Self::init_and_start_plugin_with_context(state, ctx) {
                Ok(()) => {
                    state.enabled = true;
                    println!("[ServiceManager] 插件 '{plugin_id}' 已启用");
                }
                Err(error) => {
                    state.enabled = false;
                    return Err(anyhow!("failed to enable plugin '{plugin_id}': {error}"));
                }
            }
        } else if !enabled && self.plugins[idx].enabled {
            let state = &mut self.plugins[idx];
            state.plugin.stop()?;
            state.enabled = false;
            println!("[ServiceManager] 插件 '{plugin_id}' 已禁用");
        }

        Ok(())
    }

    pub fn rollback_plugin(&mut self, plugin_id: &str) -> Result<()> {
        let idx = self
            .plugins
            .iter()
            .position(|state| state.id() == plugin_id)
            .ok_or_else(|| anyhow!("plugin '{plugin_id}' not found"))?;

        if !self.plugins[idx].is_dynamic {
            return Err(anyhow!(
                "plugin '{plugin_id}' is not dynamic and cannot be rolled back"
            ));
        }

        self.rollback_dynamic_plugin(idx, plugin_id);
        Ok(())
    }

    /// 查询插件状态信息（供 HTTP API 使用）
    pub fn plugin_states(&self) -> Vec<PluginStateInfo> {
        self.plugins
            .iter()
            .map(|s| PluginStateInfo {
                id: s.id().to_string(),
                info: s.plugin.info(),
                is_dynamic: s.is_dynamic,
                error_policy: s.error_policy.clone(),
                error_count: s.error_count,
                max_errors: s.max_errors,
                enabled: s.enabled,
                test_results: s.test_results.clone(),
                capabilities: s.capabilities.clone(),
                needs_rollback: s.needs_rollback,
            })
            .collect()
    }

    fn replace_dynamic_plugin_at_index(
        &mut self,
        idx: usize,
        plugin_id: &str,
        new_plugin: Box<dyn Plugin>,
        error_policy: ErrorPolicy,
        max_errors: u32,
        required_capabilities: Vec<String>,
        capabilities: Vec<String>,
        auto_test: bool,
    ) -> Result<()> {
        if !self.plugins[idx].is_dynamic {
            return Err(anyhow!(
                "plugin '{plugin_id}' is not dynamic and cannot be replaced"
            ));
        }

        let mut new_state = PluginState::new_dynamic(new_plugin, error_policy, max_errors);
        new_state.required_capabilities = required_capabilities;
        new_state.capabilities = capabilities;
        new_state.auto_test = auto_test;

        let ctx = self.plugin_context();
        let mut old_state = self.plugins.remove(idx);
        let old_was_enabled = old_state.enabled;

        if old_was_enabled {
            // 先停旧插件，避免热替换窗口内新旧实例同时持有端口、文件句柄等独占资源。
            old_state.plugin.stop()?;
        }

        let replace_result = Self::init_and_start_plugin_with_context(&mut new_state, ctx);
        match replace_result {
            Ok(()) => {
                new_state.enabled = true;
                self.plugins.insert(idx, new_state);
            }
            Err(new_error) => {
                if old_was_enabled {
                    let restore_ctx = self.plugin_context();
                    match Self::init_and_start_plugin_with_context(&mut old_state, restore_ctx) {
                        Ok(()) => {
                            old_state.enabled = true;
                            self.plugins.insert(idx, old_state);
                            return Err(anyhow!(
                                "failed to replace plugin '{plugin_id}': {new_error}; restored previous plugin"
                            ));
                        }
                        Err(restore_error) => {
                            old_state.enabled = false;
                            self.plugins.insert(idx, old_state);
                            return Err(anyhow!(
                                "failed to replace plugin '{plugin_id}': {new_error}; failed to restore previous plugin: {restore_error}"
                            ));
                        }
                    }
                }

                old_state.enabled = false;
                self.plugins.insert(idx, old_state);
                return Err(anyhow!(
                    "failed to replace plugin '{plugin_id}': {new_error}"
                ));
            }
        }

        println!("[ServiceManager] 插件 '{plugin_id}' 热替换成功");
        Ok(())
    }

    /// 热替换动态插件（stop 旧的 → 替换 → init → start 新的）
    pub fn replace_dynamic_plugin(
        &mut self,
        plugin_id: &str,
        new_plugin: Box<dyn Plugin>,
        error_policy: ErrorPolicy,
        max_errors: u32,
    ) -> Result<()> {
        let idx = self
            .plugins
            .iter()
            .position(|s| s.id() == plugin_id)
            .ok_or_else(|| anyhow!("plugin '{plugin_id}' not found for replacement"))?;

        if !self.plugins[idx].is_dynamic {
            return Err(anyhow!(
                "plugin '{plugin_id}' is not dynamic and cannot be replaced"
            ));
        }

        let required_capabilities = self.plugins[idx].required_capabilities.clone();
        let capabilities = self.plugins[idx].capabilities.clone();
        let auto_test = self.plugins[idx].auto_test;

        self.replace_dynamic_plugin_at_index(
            idx,
            plugin_id,
            new_plugin,
            error_policy,
            max_errors,
            required_capabilities,
            capabilities,
            auto_test,
        )
    }

    fn plugin_loader(&self) -> Result<PluginLoader> {
        let version_manager = self
            .version_manager
            .as_ref()
            .ok_or_else(|| anyhow!("plugin version manager is not configured"))?;
        Ok(PluginLoader::new(version_manager.loader().store_path()))
    }

    fn plugin_repository(&self) -> Result<PluginRepository> {
        Ok(PluginRepository::new(
            &std::env::var("SHOWEN_PLUGIN_REPO_URL")
                .ok()
                .filter(|value| !value.trim().is_empty())
                .unwrap_or_else(|| DEFAULT_PLUGIN_REPO_URL.to_string()),
            self.plugin_loader()?,
        ))
    }

    fn register_dynamic_plugin_runtime(
        &mut self,
        plugin_id: &str,
        plugin: Box<dyn Plugin>,
        error_policy: ErrorPolicy,
        max_errors: u32,
        required_capabilities: Vec<String>,
        capabilities: Vec<String>,
        auto_test: bool,
    ) -> Result<()> {
        let mut state = PluginState::new_dynamic(plugin, error_policy, max_errors);
        state.required_capabilities = required_capabilities;
        state.capabilities = capabilities;
        state.auto_test = auto_test;

        let ctx = self.plugin_context();
        Self::init_and_start_plugin_with_context(&mut state, ctx)
            .map_err(|error| anyhow!("failed to start installed plugin '{plugin_id}': {error}"))?;
        state.enabled = true;
        self.plugins.push(state);

        println!("[ServiceManager] 插件 '{plugin_id}' 已安装并启动");
        Ok(())
    }

    fn switch_plugin_version(&mut self, plugin_id: &str, version: &str) -> Result<()> {
        let version_manager = self
            .version_manager
            .as_ref()
            .ok_or_else(|| anyhow!("plugin version manager is not configured"))?;
        version_manager.switch_version(plugin_id, version)?;

        let (plugin, manifest) = version_manager
            .loader()
            .load_plugin(plugin_id, Some(version))?;
        let loader = PluginLoader::new(version_manager.loader().store_path());
        let registry = loader.load_registry()?;
        let entry = registry
            .plugins
            .get(plugin_id)
            .ok_or_else(|| anyhow!("plugin '{plugin_id}' not in registry"))?;

        if let Some(idx) = self
            .plugins
            .iter()
            .position(|state| state.id() == plugin_id)
        {
            self.replace_dynamic_plugin_at_index(
                idx,
                plugin_id,
                Box::new(plugin),
                manifest.error_policy,
                entry.max_errors,
                manifest.required_capabilities,
                manifest.capabilities,
                manifest.auto_test,
            )?;
        } else {
            self.register_dynamic_plugin_runtime(
                plugin_id,
                Box::new(plugin),
                manifest.error_policy,
                entry.max_errors,
                manifest.required_capabilities,
                manifest.capabilities,
                manifest.auto_test,
            )?;
        }

        println!("[ServiceManager] 插件 '{plugin_id}' 已切换到版本 {version}");
        Ok(())
    }

    fn install_plugin(&mut self, request: PluginInstallCommand) -> Result<()> {
        let plugin_id = request.id.clone();
        let repo = self.plugin_repository()?;
        let version = match request.version.clone() {
            Some(version) => version,
            None => repo.check_update(&plugin_id, "0.0.0")?.ok_or_else(|| {
                anyhow!(
                    "repo did not report an installable version for '{}'",
                    plugin_id
                )
            })?,
        };

        repo.download_and_install(&plugin_id, &version)?;

        let loader = self.plugin_loader()?;
        let (plugin, manifest) = loader.load_plugin(&plugin_id, Some(&version))?;

        let mut registry = loader.load_registry()?;
        let existing = registry.plugins.get(&plugin_id).cloned();
        let entry = PluginRegistryEntry {
            active_version: version.clone(),
            last_stable_version: existing
                .as_ref()
                .and_then(|entry| entry.last_stable_version.clone()),
            enabled: true,
            error_policy: existing
                .as_ref()
                .map(|entry| entry.error_policy.clone())
                .unwrap_or_else(|| manifest.error_policy.clone()),
            max_errors: existing.as_ref().map(|entry| entry.max_errors).unwrap_or(5),
        };
        registry.plugins.insert(plugin_id.clone(), entry.clone());
        loader.save_registry(&registry)?;

        if let Some(idx) = self
            .plugins
            .iter()
            .position(|state| state.id() == plugin_id)
        {
            self.replace_dynamic_plugin_at_index(
                idx,
                &plugin_id,
                Box::new(plugin),
                manifest.error_policy,
                entry.max_errors,
                manifest.required_capabilities,
                manifest.capabilities,
                manifest.auto_test,
            )?;
        } else {
            self.register_dynamic_plugin_runtime(
                &plugin_id,
                Box::new(plugin),
                manifest.error_policy,
                entry.max_errors,
                manifest.required_capabilities,
                manifest.capabilities,
                manifest.auto_test,
            )?;
        }

        Ok(())
    }

    fn check_plugin_updates(&self) -> Result<()> {
        let repo = self.plugin_repository()?;
        let registry = self.plugin_loader()?.load_registry()?;

        for (plugin_id, entry) in &registry.plugins {
            match repo.check_update(plugin_id, &entry.active_version)? {
                Some(version) => println!(
                    "[ServiceManager] 插件 '{plugin_id}' 发现可用更新: {} -> {version}",
                    entry.active_version
                ),
                None => println!(
                    "[ServiceManager] 插件 '{plugin_id}' 已是最新版本 {}",
                    entry.active_version
                ),
            }
        }

        Ok(())
    }

    fn broadcast_plugin_states(&mut self) {
        match serde_json::to_string(&self.plugin_states()) {
            Ok(payload) => self.broadcast_message(Message::Custom {
                kind: "plugin_states".to_string(),
                payload,
            }),
            Err(error) => eprintln!("[ServiceManager] 序列化 plugin_states 失败: {error}"),
        }
    }

    /// 处理发给管理层自身的消息
    fn handle_manager_message(&mut self, msg: Message) -> Result<()> {
        match msg {
            Message::Shutdown => {
                println!("[ServiceManager] 收到 Shutdown 指令");
                self.broadcast_message(Message::Shutdown);
            }
            Message::WifiResult(payload) => {
                self.broadcast_message(Message::WifiResult(payload));
            }
            Message::PlayerStatus(status) => {
                self.broadcast_message(Message::PlayerStatus(status));
            }
            Message::StateChanged {
                old_state,
                new_state,
            } => {
                self.broadcast_message(Message::StateChanged {
                    old_state,
                    new_state,
                });
            }
            Message::WifiProvisioned { ssid, ip } => {
                self.broadcast_message(Message::WifiProvisioned { ssid, ip });
            }
            Message::ConfigReloadRequest => {
                println!("[ServiceManager] 收到配置重载请求");
                match AppConfig::from_file(&self.config.source_path) {
                    Ok(new_config) => {
                        let new_config = Arc::new(new_config);
                        self.config = Arc::clone(&new_config);
                        println!("[ServiceManager] 配置重载成功，广播 ConfigReloaded");
                        self.broadcast_message(Message::ConfigReloaded((*new_config).clone()));
                    }
                    Err(e) => {
                        eprintln!("[ServiceManager] 配置重载失败: {}", e);
                    }
                }
            }
            Message::PluginReady(id) => {
                println!("[ServiceManager] 插件 '{}' 就绪", id);
                self.broadcast_message(Message::PluginReady(id));
            }
            Message::Custom { kind, payload } => {
                let should_broadcast = match kind.as_str() {
                    "plugin_enable" => {
                        if let Err(error) = self.set_plugin_enabled(&payload, true) {
                            eprintln!(
                                "[ServiceManager] plugin_enable('{}') 失败: {error}",
                                payload
                            );
                        }
                        true
                    }
                    "plugin_disable" => {
                        if let Err(error) = self.set_plugin_enabled(&payload, false) {
                            eprintln!(
                                "[ServiceManager] plugin_disable('{}') 失败: {error}",
                                payload
                            );
                        }
                        true
                    }
                    "plugin_rollback" => {
                        if let Err(error) = self.rollback_plugin(&payload) {
                            eprintln!(
                                "[ServiceManager] plugin_rollback('{}') 失败: {error}",
                                payload
                            );
                        }
                        true
                    }
                    "plugin_switch" => {
                        match serde_json::from_str::<PluginSwitchCommand>(&payload) {
                            Ok(command) => {
                                if let Err(error) =
                                    self.switch_plugin_version(&command.id, &command.version)
                                {
                                    eprintln!(
                                        "[ServiceManager] plugin_switch('{}', '{}') 失败: {error}",
                                        command.id, command.version
                                    );
                                }
                            }
                            Err(error) => {
                                eprintln!("[ServiceManager] plugin_switch payload 非法: {error}");
                            }
                        }
                        true
                    }
                    "plugin_install" => {
                        match serde_json::from_str::<PluginInstallCommand>(&payload) {
                            Ok(command) => {
                                if let Err(error) = self.install_plugin(command) {
                                    eprintln!("[ServiceManager] plugin_install 失败: {error}");
                                }
                            }
                            Err(error) => {
                                eprintln!("[ServiceManager] plugin_install payload 非法: {error}");
                            }
                        }
                        true
                    }
                    "plugin_check_updates" => {
                        if let Err(error) = self.check_plugin_updates() {
                            eprintln!("[ServiceManager] plugin_check_updates 失败: {error}");
                        }
                        true
                    }
                    _ => false,
                };

                if should_broadcast {
                    self.broadcast_plugin_states();
                }
            }
            _ => {}
        }
        Ok(())
    }

    fn validate_and_sort_plugins(&mut self) -> Result<()> {
        let mut plugin_ids = Vec::with_capacity(self.plugins.len());
        let mut plugin_set = HashSet::with_capacity(self.plugins.len());
        let mut dependency_map = HashMap::with_capacity(self.plugins.len());

        for state in &self.plugins {
            let id = state.id().to_string();
            if !plugin_set.insert(id.clone()) {
                return Err(anyhow!("duplicate plugin id registered: '{id}'"));
            }

            plugin_ids.push(id.clone());
            dependency_map.insert(id, state.plugin.dependencies());
        }

        for (plugin_id, dependencies) in &dependency_map {
            for dependency in dependencies {
                if dependency == plugin_id {
                    return Err(anyhow!("plugin '{plugin_id}' cannot depend on itself"));
                }

                if !plugin_set.contains(dependency.as_str()) {
                    return Err(anyhow!(
                        "plugin '{plugin_id}' depends on missing plugin '{dependency}'"
                    ));
                }
            }
        }

        let mut resolved = HashSet::with_capacity(plugin_ids.len());
        let mut sorted_ids = Vec::with_capacity(plugin_ids.len());

        while sorted_ids.len() < plugin_ids.len() {
            let mut progressed = false;

            for plugin_id in &plugin_ids {
                if resolved.contains(plugin_id) {
                    continue;
                }

                let dependencies = dependency_map
                    .get(plugin_id)
                    .expect("plugin dependency map must contain all registered ids");

                if dependencies
                    .iter()
                    .all(|dependency| resolved.contains(dependency))
                {
                    resolved.insert(plugin_id.clone());
                    sorted_ids.push(plugin_id.clone());
                    progressed = true;
                }
            }

            if !progressed {
                let unresolved = plugin_ids
                    .iter()
                    .filter(|plugin_id| !resolved.contains(plugin_id.as_str()))
                    .cloned()
                    .collect::<Vec<_>>()
                    .join(", ");

                return Err(anyhow!(
                    "plugin dependency cycle detected among: {unresolved}"
                ));
            }
        }

        let mut remaining_plugins = std::mem::take(&mut self.plugins);
        let mut ordered_plugins = Vec::with_capacity(remaining_plugins.len());

        for plugin_id in &sorted_ids {
            let index = remaining_plugins
                .iter()
                .position(|state| state.id() == plugin_id)
                .ok_or_else(|| anyhow!("plugin '{plugin_id}' disappeared during sorting"))?;
            ordered_plugins.push(remaining_plugins.remove(index));
        }

        self.plugins = ordered_plugins;
        Ok(())
    }

    /// 投递消息给指定插件，带错误计数和策略处理
    fn deliver_to_plugin(&mut self, id: &str, msg: Message) {
        let state = match self.plugins.iter_mut().find(|s| s.id() == id) {
            Some(s) => s,
            None => {
                eprintln!("[ServiceManager] 目标插件 '{}' 不存在", id);
                return;
            }
        };

        if !state.enabled {
            return;
        }

        match state.plugin.handle_message(msg) {
            Ok(()) => {
                state.reset_errors();
            }
            Err(e) => {
                eprintln!(
                    "[ServiceManager] 插件 '{}' 处理消息失败 ({}/{}): {}",
                    id,
                    state.error_count + 1,
                    state.max_errors,
                    e
                );

                if state.record_error() && state.is_dynamic {
                    self.handle_error_threshold(id);
                }
            }
        }
    }

    fn broadcast_message(&mut self, msg: Message) {
        let should_shutdown = matches!(&msg, Message::Shutdown);

        for state in &mut self.plugins {
            if !state.enabled {
                continue;
            }

            match state.plugin.handle_message(msg.clone()) {
                Ok(()) => {
                    state.reset_errors();
                }
                Err(e) => {
                    eprintln!(
                        "[ServiceManager] 插件 '{}' 处理广播消息失败: {}",
                        state.id(),
                        e
                    );
                    // 广播消息的错误不触发阈值处理（避免广播期间修改列表）
                }
            }
        }

        if should_shutdown {
            println!("[ServiceManager] 收到 Shutdown 广播");
            self.running = false;
        }
    }

    /// 插件错误达到阈值时的处理
    fn handle_error_threshold(&mut self, plugin_id: &str) {
        let idx = match self.plugins.iter().position(|s| s.id() == plugin_id) {
            Some(idx) => idx,
            None => return,
        };

        match self.plugins[idx].error_policy.clone() {
            ErrorPolicy::DisableAndLog => {
                eprintln!(
                    "[ServiceManager] 插件 '{}' 错误次数达到阈值，已禁用",
                    plugin_id
                );
                let state = &mut self.plugins[idx];
                let _ = state.plugin.stop();
                state.enabled = false;
                state.needs_rollback = false;
            }
            ErrorPolicy::AutoRollback => {
                {
                    let state = &mut self.plugins[idx];
                    let _ = state.plugin.stop();
                    state.enabled = false;
                    state.needs_rollback = false;
                }

                eprintln!(
                    "[ServiceManager] 插件 '{}' 错误次数达到阈值，尝试自动回退到稳定版本",
                    plugin_id
                );
                self.rollback_dynamic_plugin(idx, plugin_id);
            }
        }
    }

    fn rollback_dynamic_plugin(&mut self, idx: usize, plugin_id: &str) {
        let rollback_result = {
            let Some(version_manager) = self.version_manager.as_ref() else {
                eprintln!(
                    "[ServiceManager] 插件 '{}' 未配置 VersionManager，标记为待回退",
                    plugin_id
                );
                self.plugins[idx].needs_rollback = true;
                return;
            };

            match version_manager.rollback(plugin_id) {
                Ok(version) => match version_manager
                    .loader()
                    .load_plugin(plugin_id, Some(&version))
                {
                    Ok((plugin, manifest)) => {
                        Ok((version, Box::new(plugin) as Box<dyn Plugin>, manifest))
                    }
                    Err(e) => Err((Some(version), e)),
                },
                Err(e) => Err((None, e)),
            }
        };

        match rollback_result {
            Ok((version, plugin, manifest)) => {
                let max_errors = self.plugins[idx].max_errors;
                match self.replace_dynamic_plugin_at_index(
                    idx,
                    plugin_id,
                    plugin,
                    manifest.error_policy,
                    max_errors,
                    manifest.required_capabilities,
                    manifest.capabilities,
                    manifest.auto_test,
                ) {
                    Ok(()) => {
                        self.plugins[idx].needs_rollback = false;
                        println!(
                            "[ServiceManager] 插件 '{}' 已回退并重新加载稳定版本 {}",
                            plugin_id, version
                        );
                    }
                    Err(e) => {
                        eprintln!(
                            "[ServiceManager] 插件 '{}' 已切换到稳定版本 {}，但热替换失败: {}",
                            plugin_id, version, e
                        );
                        self.plugins[idx].needs_rollback = true;
                    }
                }
            }
            Err((Some(version), e)) => {
                eprintln!(
                    "[ServiceManager] 插件 '{}' 已切换到稳定版本 {}，但加载回退版本失败: {}",
                    plugin_id, version, e
                );
                self.plugins[idx].needs_rollback = true;
            }
            Err((None, e)) => {
                eprintln!(
                    "[ServiceManager] 插件 '{}' 自动回退失败，标记为待回退: {}",
                    plugin_id, e
                );
                self.plugins[idx].needs_rollback = true;
            }
        }
    }

    /// 获取发送通道的克隆（供外部使用）
    pub fn sender(&self) -> mpsc::Sender<Envelope> {
        self.tx.clone()
    }
}

/// 插件状态信息（用于 API 查询）
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct PluginStateInfo {
    pub id: String,
    pub info: crate::core::plugin::PluginInfo,
    pub is_dynamic: bool,
    pub error_policy: ErrorPolicy,
    pub error_count: u32,
    pub max_errors: u32,
    pub enabled: bool,
    pub test_results: Vec<CapabilityTestResult>,
    pub capabilities: Vec<String>,
    pub needs_rollback: bool,
}