use anyhow::anyhow;
use std::net::Ipv4Addr;
use std::str::FromStr;

use crate::config::get_device_id;
use crate::{args_parse, config};
use serde::{Deserialize, Serialize};
use vnt::channel::punch::PunchModel;
use vnt::channel::UseChannelType;
use vnt::cipher::CipherModel;
use vnt::compression::Compressor;
use vnt::core::Config;

#[derive(Serialize, Deserialize, Debug)]
#[serde(default)]
pub struct FileConfig {
    #[cfg(target_os = "windows")]
    pub tap: bool,
    pub token: String,
    pub device_id: String,
    pub name: String,
    pub server_address: String,
    pub stun_server: Vec<String>,
    pub dns: Vec<String>,
    pub in_ips: Vec<String>,
    pub out_ips: Vec<String>,
    pub password: Option<String>,
    pub mtu: Option<u32>,
    pub tcp: bool,
    pub ip: Option<String>,
    pub use_channel: String,
    #[cfg(feature = "ip_proxy")]
    pub no_proxy: bool,
    pub server_encrypt: bool,
    pub cipher_model: Option<String>,
    pub finger: bool,
    pub punch_model: String,
    pub ports: Option<Vec<u16>>,
    pub cmd: bool,
    pub first_latency: bool,
    pub device_name: Option<String>,
    pub packet_loss: Option<f64>,
    pub packet_delay: u32,
    #[cfg(feature = "port_mapping")]
    pub mapping: Vec<String>,
    pub compressor: Option<String>,
    pub vnt_mapping: Vec<String>,
    pub disable_stats: bool,
    // 允许传递wg流量
    pub allow_wire_guard: bool,
}

impl Default for FileConfig {
    fn default() -> Self {
        let mut stun_server = Vec::new();
        for x in config::PUB_STUN {
            stun_server.push(x.to_string());
        }
        Self {
            #[cfg(target_os = "windows")]
            tap: false,
            token: "".to_string(),
            device_id: get_device_id(),
            name: gethostname::gethostname()
                .to_str()
                .unwrap_or("UnknownName")
                .to_string(),
            server_address: "nat1.wherewego.top:29872".to_string(),
            stun_server,
            dns: vec![],
            in_ips: vec![],
            out_ips: vec![],
            password: None,
            mtu: None,
            tcp: false,
            ip: None,
            use_channel: "all".to_string(),
            #[cfg(feature = "ip_proxy")]
            no_proxy: false,
            server_encrypt: false,
            cipher_model: None,
            finger: false,
            punch_model: "all".to_string(),
            ports: None,
            cmd: false,
            first_latency: false,
            device_name: None,
            packet_loss: None,
            packet_delay: 0,
            #[cfg(feature = "port_mapping")]
            mapping: vec![],
            compressor: None,
            vnt_mapping: vec![],
            disable_stats: false,
            allow_wire_guard: false,
        }
    }
}

pub fn read_config(file_path: &str) -> anyhow::Result<(Config, Vec<String>, bool)> {
    let conf = std::fs::read_to_string(file_path)?;
    let file_conf = match serde_yaml::from_str::<FileConfig>(&conf) {
        Ok(val) => val,
        Err(e) => {
            log::error!("{:?}", e);
            return Err(anyhow!("{}", e));
        }
    };
    if file_conf.token.is_empty() {
        return Err(anyhow!("token is_empty"));
    }

    let in_ips = match args_parse::ips_parse(&file_conf.in_ips) {
        Ok(in_ips) => in_ips,
        Err(e) => {
            return Err(anyhow!("in_ips {:?} error:{}", &file_conf.in_ips, e));
        }
    };
    let out_ips = match args_parse::out_ips_parse(&file_conf.out_ips) {
        Ok(out_ips) => out_ips,
        Err(e) => {
            return Err(anyhow!("out_ips {:?} error:{}", &file_conf.out_ips, e));
        }
    };
    let virtual_ip = match file_conf.ip.clone().map(|v| Ipv4Addr::from_str(&v)) {
        None => None,
        Some(r) => Some(r.map_err(|e| anyhow!("ip {:?} error:{}", &file_conf.ip, e))?),
    };
    let cipher_model = if let Some(v) = file_conf.cipher_model {
        CipherModel::from_str(&v).map_err(|e| anyhow!("{}", e))?
    } else {
        #[cfg(not(any(feature = "aes_gcm", feature = "server_encrypt")))]
        if file_conf.password.is_some() {
            Err(anyhow!("cipher_model undefined"))?
        } else {
            CipherModel::None
        }
        #[cfg(any(feature = "aes_gcm", feature = "server_encrypt"))]
        CipherModel::AesGcm
    };

    let punch_model = PunchModel::from_str(&file_conf.punch_model).map_err(|e| anyhow!("{}", e))?;
    let use_channel_type =
        UseChannelType::from_str(&file_conf.use_channel).map_err(|e| anyhow!("{}", e))?;
    let compressor = if let Some(compressor) = file_conf.compressor.as_ref() {
        Compressor::from_str(compressor).map_err(|e| anyhow!("{}", e))?
    } else {
        Compressor::None
    };
    let config = Config::new(
        #[cfg(target_os = "windows")]
        #[cfg(feature = "integrated_tun")]
        file_conf.tap,
        file_conf.token,
        file_conf.device_id,
        file_conf.name,
        file_conf.server_address,
        file_conf.dns,
        file_conf.stun_server,
        in_ips,
        out_ips,
        file_conf.password,
        file_conf.mtu,
        virtual_ip,
        #[cfg(feature = "integrated_tun")]
        #[cfg(feature = "ip_proxy")]
        file_conf.no_proxy,
        file_conf.server_encrypt,
        cipher_model,
        file_conf.finger,
        punch_model,
        file_conf.ports,
        file_conf.first_latency,
        #[cfg(feature = "integrated_tun")]
        file_conf.device_name,
        use_channel_type,
        file_conf.packet_loss,
        file_conf.packet_delay,
        #[cfg(feature = "port_mapping")]
        file_conf.mapping,
        compressor,
        !file_conf.disable_stats,
        file_conf.allow_wire_guard,
    )?;

    Ok((config, file_conf.vnt_mapping, file_conf.cmd))
}