package main

import (
	"errors"
	"io/ioutil"
	"log"
	"os"
	"regexp"

	"gopkg.in/yaml.v3"
)

type serveConfig struct {
	Path string

	Root  string
	Proxy string

	r *regexp.Regexp
}

type serverConfig struct {
	Cert    string
	Key     string
	Address string
	Serve   []*serveConfig
}

var config = &serverConfig{}

func readconfig(configPath string) error {
	if configPath == "" {
		return errors.New("file unspecified")
	}

	if _, err := os.Stat(configPath); os.IsNotExist(err) {
		return errors.New("file not found")
	}

	configData, err := ioutil.ReadFile(configPath)
	if err != nil {
		return err
	}

	err = yaml.Unmarshal(configData, &config)
	if err != nil {
		return err
	}

	for _, serve := range config.Serve {
		if serve.Path == "" {
			log.Fatal("path must be specified in serve entry")
		} else if serve.Root != "" && serve.Proxy != "" {
			log.Fatal("only one root or reverse proxy may defined for a serve entry")
		}

		if serve.Path[0] == '^' {
			serve.r = regexp.MustCompile(serve.Path)
		} else if serve.Path[len(serve.Path)-1] == '/' {
			serve.Path = serve.Path[:len(serve.Path)-1]
		}
	}

	return nil
}