/*
 * Copyright (C) 2020-2022, IrineSistiana
 *
 * This file is part of mosdns.
 *
 * mosdns is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * mosdns is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package mikrotik_addresslist

import (
	"fmt"
	"strconv"
	"strings"

	"github.com/IrineSistiana/mosdns/v5/coremain"
	"github.com/IrineSistiana/mosdns/v5/plugin/executable/sequence"
)

const PluginType = "mikrotik_addresslist"

func init() {
	coremain.RegNewPluginFunc(PluginType, Init, func() any { return new(Args) })
	sequence.MustRegExecQuickSetup(PluginType, QuickSetup)
}

type Args struct {
	Host     string `yaml:"host"`     // MikroTik 路由器 IP 地址
	Port     int    `yaml:"port"`     // API 端口，默认 8728
	Username string `yaml:"username"` // 用户名
	Password string `yaml:"password"` // 密码
	UseTLS   bool   `yaml:"use_tls"`  // 是否使用 TLS，默认 false
	Timeout  int    `yaml:"timeout"`  // 连接超时时间（秒），默认 10

	AddressList4 string `yaml:"address_list4"` // IPv4 address list 名称
	AddressList6 string `yaml:"address_list6"` // IPv6 address list 名称
	Mask4        int    `yaml:"mask4"`         // IPv4 掩码，默认 32（单个IP）
	Mask6        int    `yaml:"mask6"`         // IPv6 掩码，默认 128（单个IP）
	Comment      string `yaml:"comment"`       // 添加的地址的注释
	TimeoutAddr  int    `yaml:"timeout_addr"`  // 地址超时时间（秒），0 表示永久
	CacheTTL     int    `yaml:"cache_ttl"`     // 缓存 TTL（秒），默认 3600（1小时）
	VerifyAdd    bool   `yaml:"verify_add"`    // 是否在添加后验证地址确实存在，默认 false
	AddAllIPs    bool   `yaml:"add_all_ips"`   // 是否添加DNS响应中的所有IP地址，默认 true
	MaxIPs       int    `yaml:"max_ips"`       // 每个域名最多添加的IP数量，0表示无限制，默认 0
}

var _ sequence.Executable = (*mikrotikAddressListPlugin)(nil)

// Init initializes the plugin from coremain
func Init(bp *coremain.BP, args any) (any, error) {
	return newMikrotikAddressListPlugin(args.(*Args))
}

// QuickSetup format: host:port:username:password:use_tls:timeout:address_list4:address_list6:mask4:mask6:comment:timeout_addr:cache_ttl:verify_add
// e.g. "192.168.1.1:8728:admin:password:false:10:my_list4:my_list6:24:32:from_dns:3600:3600:true"
func QuickSetup(_ sequence.BQ, s string) (any, error) {
	parts := strings.Split(s, ":")
	if len(parts) < 6 {
		return nil, fmt.Errorf("invalid args, expect at least 6 parts, got %d", len(parts))
	}

	args := &Args{
		Host:      parts[0],
		Username:  parts[2],
		Password:  parts[3],
		UseTLS:    false,
		Timeout:   10,
		Mask4:     32,   // 默认单个IP，确保所有IP都被添加
		Mask6:     128,  // 默认单个IP，确保所有IP都被添加
		AddAllIPs: true, // 默认添加所有IP
		MaxIPs:    0,    // 默认无限制
	}

	// 解析端口
	if port, err := strconv.Atoi(parts[1]); err == nil {
		args.Port = port
	} else {
		args.Port = 8728
	}

	// 解析 TLS 设置
	if len(parts) > 4 {
		if useTLS, err := strconv.ParseBool(parts[4]); err == nil {
			args.UseTLS = useTLS
		}
	}

	// 解析超时时间
	if len(parts) > 5 {
		if timeout, err := strconv.Atoi(parts[5]); err == nil {
			args.Timeout = timeout
		}
	}

	// 解析 address list 名称
	if len(parts) > 6 {
		args.AddressList4 = parts[6]
	}
	if len(parts) > 7 {
		args.AddressList6 = parts[7]
	}

	// 解析掩码
	if len(parts) > 8 {
		if mask4, err := strconv.Atoi(parts[8]); err == nil {
			args.Mask4 = mask4
		}
	}
	if len(parts) > 9 {
		if mask6, err := strconv.Atoi(parts[9]); err == nil {
			args.Mask6 = mask6
		}
	}

	// 解析注释
	if len(parts) > 10 {
		args.Comment = parts[10]
	}

	// 解析地址超时时间
	if len(parts) > 11 {
		if timeoutAddr, err := strconv.Atoi(parts[11]); err == nil {
			args.TimeoutAddr = timeoutAddr
		}
	}

	// 解析缓存 TTL
	if len(parts) > 12 {
		if cacheTTL, err := strconv.Atoi(parts[12]); err == nil {
			args.CacheTTL = cacheTTL
		}
	}

	// 解析验证开关
	if len(parts) > 13 {
		if verifyAdd, err := strconv.ParseBool(parts[13]); err == nil {
			args.VerifyAdd = verifyAdd
		}
	}

	return newMikrotikAddressListPlugin(args)
}