package fastio

import (
	"bufio"
	"io"
	"os"
	"strings"
)

func Read(path string) (result string) {
	var res string
	list := strings.Split(path, ".")
	suffix := list[len(list)-1]

	switch suffix {
	case "json":
		readJSON()
	case "toml":
		readTOML()
	case "md", "txt", "go":
		res = readText(path)
	default:
		res = "Unknown kind:" + suffix
	}
	return res
}

func readJSON() {

}

func readTOML() {

}

func readText(path string) (content string) {
	file, err := os.Open(path)
	if err != nil {
		panic(err)
	}

	// 创建 Reader
	r := bufio.NewReader(file)
	var b strings.Builder

	buf := make([]byte, 1024)
	for {
		b.Grow(1024)
		n, err := r.Read(buf)
		if err != nil && err != io.EOF {
			panic(err)
		}

		if n == 0 {
			break
		}
		b.Write(buf[:n])
	}
	return b.String()
}