//！
//! feat mod 里的函数主要用于
//! - hotkey 快捷键
//! - timer 定时器
//! - cmds 页面调用
//!
use crate::config::*;
use crate::core::*;
use crate::log_err;
use anyhow::{bail, Result};
use serde_yaml::{Mapping, Value};

// 重启clash
pub fn restart_clash_core() {
    tauri::async_runtime::spawn(async {
        match CoreManager::global().run_core().await {
            Ok(_) => {
                handle::Handle::refresh_clash();
                handle::Handle::notice_message("set_config::ok", "ok");
            }
            Err(err) => {
                handle::Handle::notice_message("set_config::error", format!("{err}"));
                log::error!(target:"app", "{err}");
            }
        }
    });
}

// 切换模式 rule/global/direct/script mode
pub fn change_clash_mode(mode: String) {
    let mut mapping = Mapping::new();
    mapping.insert(Value::from("mode"), mode.clone().into());

    tauri::async_runtime::spawn(async move {
        match clash_api::patch_configs(&mapping).await {
            Ok(_) => {
                // 更新配置
                Config::clash().data().patch_config(mapping);

                if let Ok(_) = Config::clash().data().save_config() {
                    handle::Handle::refresh_clash();
                    log_err!(handle::Handle::update_systray_part());
                }
            }
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 切换系统代理
pub fn toggle_system_proxy() {
    let enable = Config::verge().draft().enable_system_proxy.clone();
    let enable = enable.unwrap_or(false);

    tauri::async_runtime::spawn(async move {
        match patch_verge(IVerge {
            enable_system_proxy: Some(!enable),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 打开系统代理
pub fn enable_system_proxy() {
    tauri::async_runtime::spawn(async {
        match patch_verge(IVerge {
            enable_system_proxy: Some(true),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 关闭系统代理
pub fn disable_system_proxy() {
    tauri::async_runtime::spawn(async {
        match patch_verge(IVerge {
            enable_system_proxy: Some(false),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 切换tun模式
pub fn toggle_tun_mode() {
    let enable = Config::verge().data().enable_tun_mode.clone();
    let enable = enable.unwrap_or(false);

    tauri::async_runtime::spawn(async move {
        match patch_verge(IVerge {
            enable_tun_mode: Some(!enable),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 打开tun模式
pub fn enable_tun_mode() {
    tauri::async_runtime::spawn(async {
        match patch_verge(IVerge {
            enable_tun_mode: Some(true),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

// 关闭tun模式
pub fn disable_tun_mode() {
    tauri::async_runtime::spawn(async {
        match patch_verge(IVerge {
            enable_tun_mode: Some(false),
            ..IVerge::default()
        })
        .await
        {
            Ok(_) => handle::Handle::refresh_verge(),
            Err(err) => log::error!(target: "app", "{err}"),
        }
    });
}

/// 修改clash的配置
pub async fn patch_clash(patch: Mapping) -> Result<()> {
    Config::clash().draft().patch_config(patch.clone());

    match {
        let mixed_port = patch.get("mixed-port");
        if mixed_port.is_some() {
            let changed = mixed_port != Config::clash().data().0.get("mixed-port");
            // 检查端口占用
            if changed {
                if let Some(port) = mixed_port.clone().unwrap().as_u64() {
                    if !port_scanner::local_port_available(port as u16) {
                        Config::clash().discard();
                        bail!("port already in use");
                    }
                }
            }
        };

        // 激活配置
        if mixed_port.is_some()
            || patch.get("secret").is_some()
            || patch.get("external-controller").is_some()
        {
            Config::generate()?;
            CoreManager::global().run_core().await?;
            handle::Handle::refresh_clash();
        }

        // 更新系统代理
        if mixed_port.is_some() {
            log_err!(sysopt::Sysopt::global().init_sysproxy());
        }

        if patch.get("mode").is_some() {
            log_err!(handle::Handle::update_systray_part());
        }

        <Result<()>>::Ok(())
    } {
        Ok(()) => {
            Config::clash().apply();
            Config::clash().data().save_config()?;
            Ok(())
        }
        Err(err) => {
            Config::clash().discard();
            Err(err)
        }
    }
}

/// 修改verge的配置
/// 一般都是一个个的修改
pub async fn patch_verge(patch: IVerge) -> Result<()> {
    Config::verge().draft().patch_config(patch.clone());

    let tun_mode = patch.enable_tun_mode;
    let auto_launch = patch.enable_auto_launch;
    let system_proxy = patch.enable_system_proxy;
    let proxy_bypass = patch.system_proxy_bypass;
    let language = patch.language;

    match {
        #[cfg(target_os = "windows")]
        {
            let service_mode = patch.enable_service_mode;

            if service_mode.is_some() {
                log::debug!(target: "app", "change service mode to {}", service_mode.unwrap());

                Config::generate()?;
                CoreManager::global().run_core().await?;
            } else if tun_mode.is_some() {
                update_core_config().await?;
            }
        }

        #[cfg(not(target_os = "windows"))]
        if tun_mode.is_some() {
            update_core_config().await?;
        }

        if auto_launch.is_some() {
            sysopt::Sysopt::global().update_launch()?;
        }
        if system_proxy.is_some() || proxy_bypass.is_some() {
            sysopt::Sysopt::global().update_sysproxy()?;
            sysopt::Sysopt::global().guard_proxy();
        }

        if let Some(true) = patch.enable_proxy_guard {
            sysopt::Sysopt::global().guard_proxy();
        }

        if let Some(hotkeys) = patch.hotkeys {
            hotkey::Hotkey::global().update(hotkeys)?;
        }

        if language.is_some() {
            handle::Handle::update_systray()?;
        } else if system_proxy.or(tun_mode).is_some() {
            handle::Handle::update_systray_part()?;
        }

        <Result<()>>::Ok(())
    } {
        Ok(()) => {
            Config::verge().apply();
            Config::verge().data().save_file()?;
            Ok(())
        }
        Err(err) => {
            Config::verge().discard();
            Err(err)
        }
    }
}

/// 更新某个profile
/// 如果更新当前配置就激活配置
pub async fn update_profile(uid: String, option: Option<PrfOption>) -> Result<()> {
    let url_opt = {
        let profiles = Config::profiles();
        let profiles = profiles.latest();
        let item = profiles.get_item(&uid)?;
        let is_remote = item.itype.as_ref().map_or(false, |s| s == "remote");

        if !is_remote {
            None // 直接更新
        } else if item.url.is_none() {
            bail!("failed to get the profile item url");
        } else {
            Some((item.url.clone().unwrap(), item.option.clone()))
        }
    };

    let should_update = match url_opt {
        Some((url, opt)) => {
            let merged_opt = PrfOption::merge(opt, option);
            let item = PrfItem::from_url(&url, None, None, merged_opt).await?;

            let profiles = Config::profiles();
            let mut profiles = profiles.latest();
            profiles.update_item(uid.clone(), item)?;

            Some(uid) == profiles.get_current()
        }
        None => true,
    };

    if should_update {
        update_core_config().await?;
    }

    Ok(())
}

/// 更新配置
async fn update_core_config() -> Result<()> {
    match CoreManager::global().update_config().await {
        Ok(_) => {
            handle::Handle::refresh_clash();
            handle::Handle::notice_message("set_config::ok", "ok");
            Ok(())
        }
        Err(err) => {
            handle::Handle::notice_message("set_config::error", format!("{err}"));
            Err(err)
        }
    }
}