package starainrt

import (
	"bufio"
	"errors"
	"io"
	"io/ioutil"
	"os"
	"regexp"
	"strings"
)

func ReWriteFileByKV(filepath, rem, conn, ret string, kv map[string]string) bool {
	var outputstr string
	var ataru bool = false
	if (!Exists(filepath)) || (!IsFile(filepath)) {
		return false
	}
	fso, err := os.Open(filepath)
	if err != nil {
		return false
	}
	rempar := regexp.MustCompile("^" + rem)
	buf := bufio.NewReader(fso)
	for {
		bytxt, _, eof := buf.ReadLine()
		if eof == io.EOF {
			break
		}
		txt := strings.TrimSpace(string(bytxt))
		if rempar.Match([]byte(txt)) {
			outputstr += txt + ret
			continue
		}
		for k, v := range kv {
			keypar := regexp.MustCompile("^" + k)
			if keypar.Match([]byte(txt)) {
				ataru = true
				outputstr += k + conn + v + ret
				delete(kv, k)
			}
		}
		if ataru {
			ataru = false
			continue
		} else {
			outputstr += txt + ret
		}
	}
	fso.Close()
	if len(kv) != 0 {
		for k, v := range kv {
			outputstr += k + conn + v + ret
			delete(kv, k)
		}
	}
	err = ioutil.WriteFile(filepath, []byte(outputstr), 0755)
	if err != nil {
		return false
	}
	return true
}

func GetINIValue(filepath, rem, conn string, kv []string) (bool, map[string]string) {
	outputstr := make(map[string]string)
	if (!Exists(filepath)) || (!IsFile(filepath)) {
		return false, outputstr
	}
	fso, err := os.Open(filepath)
	if err != nil {
		return false, outputstr
	}
	rempar := regexp.MustCompile("^" + rem)
	buf := bufio.NewReader(fso)
	for {
		bytxt, _, eof := buf.ReadLine()
		if eof == io.EOF {
			break
		}
		txt := strings.TrimSpace(string(bytxt))
		if rempar.Match([]byte(txt)) {
			continue
		}
		var i int = 0
		var v2 string
		for k, v := range kv {
			if v == "" {
				continue
			}
			v2 = ""
			for _, b := range []byte(v) {
				switch string(b) {
				case ".":
					v2 += "\\."
				case "\\":
					v2 += "\\"
				case "-":
					v2 += "\\-"
				case "(":
					v2 += "\\("
				case ")":
					v2 += "\\)"
				case "{":
					v2 += "\\{"
				case "}":
					v2 += "\\}"
				case "[":
					v2 += "\\["
				case "]":
					v2 += "\\]"
				case "$":
					v2 += "\\]$"
				case "^":
					v2 += "\\^"
				default:
					v2 += string(b)
				}
			}
			keypar := regexp.MustCompile("^" + v2 + ".*?" + conn + "(.*?)" + "(" + rem + "|$)")
			if keypar.Match([]byte(txt)) {
				i++
				kekka := keypar.FindSubmatch([]byte(txt))
				outputstr[v] = string(kekka[1])
				kv[k] = ""
			}
		}
		if i != len(kv) {
			for _, v := range kv {
				if v != "" {
					outputstr[v] = ""
				}
			}
		}
	}
	return true, outputstr
}

func ReadINIConfig(filepath string) (map[string]map[string]string, error) {
	var result map[string]map[string]string
	result = make(map[string]map[string]string)
	if !Exists(filepath) {
		return result, errors.New("file not exists")
	}
	data, err := ioutil.ReadFile(filepath)
	if err != nil {
		return result, nil
	}
	strdata := string(data)
	datas := strings.Split(strdata, "\n")
	var inseg, nolabel bool = false, false
	var segname string
jump:
	if nolabel {
		segname = "unnamed"
		inseg = true
	}
	for _, v := range datas {
		v = strings.TrimSpace(v)
		if ok, _ := regexp.MatchString("^#", v); ok {
			continue
		}
		segfind := regexp.MustCompile(`\[(.*)\]`)
		if !inseg {
			if ok, _ := regexp.MatchString(`(.*?)=(.*)`, v); ok {
				nolabel = true
				goto jump
			}
			if !segfind.MatchString(v) {
				continue
			} else {
				tmp := segfind.FindStringSubmatch(v)
				segname = tmp[1]
				inseg = true
			}
		} else {
			if segfind.MatchString(v) {
				tmp := segfind.FindStringSubmatch(v)
				segname = tmp[1]
				inseg = true
			}
		}
		if fn := strings.Index(v, "#"); fn >= 0 {
			v = v[0:fn]
		}
		if ok, _ := regexp.MatchString(`(.*?)=(.*)`, v); ok {
			regtmp := regexp.MustCompile(`(.*?)=(.*)`)
			tmp := regtmp.FindStringSubmatch(v)
			if result[segname] == nil {
				result[segname] = make(map[string]string)
			}
			result[segname][strings.TrimSpace(tmp[1])] = strings.TrimSpace(tmp[2])
		} else {
			continue
		}
	}
	return result, nil
}