package main

import (
	"encoding/json"
	log "github.com/sirupsen/logrus"
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
)

type configStaticHtml struct {
	Dir         string
	StaticUrl   string
	StripPrefix string
}

type configuration struct {
	Host       string
	Port       string
	DSN        string
	TlsCert    string
	TlsKey     string
	Static     []configStaticHtml
	Debug      bool
	UploadsDir struct {
		FileDir      string
		FileDefault  string
		JpgDir       string
		JpgDefault   string
		ThumbDir     string
		ThumbDefault string
		PdfDir       string
		PdfDefault   string
		JsonDir      string
	}
	TempDir string
	Session struct { //TODO: figure what is this intended for
		Guest bool
		Year  int //how many years
		Month int //how many years
		Day   int //how many years
	}
}

var configFile = "config.json"
var config = configuration{}

func (m *configuration) readConfig() (e error) {
	log.Printf("read Path config from %s", configFile)
	body, e := ioutil.ReadFile(configFile)
	if e != nil {
		log.Fatal("Cannot read config from " + configFile)
		return
	}
	e = json.Unmarshal(body, m)

	// Check upload dir and defaults
	if !config.checkUploadDir() {
		log.Fatal("bad config file", configFile)
		return
	}

	if config.Debug {
		log.Println(config)
	}

	//TODO: check config before proceed further
	return
}

func (m *configuration) checkUploadDir() (valid bool) {
	valid = true
	if !fileExists(m.UploadsDir.ThumbDefault) {
		valid = false
		log.Fatal("default thumbnail is missing ", m.UploadsDir.ThumbDefault)
	}

	if !fileExists(m.UploadsDir.FileDefault) {
		valid = false
		log.Fatal("default file for upload  is missing ", m.UploadsDir.FileDefault)
	}
	if !fileExists(m.UploadsDir.JpgDefault) {
		valid = false
		log.Fatal("default jpg for upload is missing ", m.UploadsDir.JpgDefault)
	}
	if !fileExists(m.UploadsDir.PdfDefault) {
		valid = false
		log.Fatal("default pdf for upload is missing ", &m.UploadsDir.PdfDefault)
	}

	//check dir
	if !fileExists(m.UploadsDir.FileDir) {
		valid = false
		log.Fatal("UploadsDir.FileDir is missing ", m.UploadsDir.FileDir)
	}

	if !fileExists(m.UploadsDir.JpgDir) {
		valid = false
		log.Fatal("UploadsDir.JpgDir is missing ", m.UploadsDir.JpgDir)
	}
	if !fileExists(m.UploadsDir.ThumbDir) {
		valid = false
		log.Fatal("UploadsDir.ThumbDir is missing ", m.UploadsDir.ThumbDir)
	}
	if !fileExists(m.UploadsDir.PdfDir) {
		valid = false
		log.Fatal("UploadsDir.PdfDir is missing ", m.UploadsDir.PdfDir)
	}

	if !fileExists(m.UploadsDir.JsonDir) {
		valid = false
		log.Fatal("UploadsDir.JsonDir is missing ", m.UploadsDir.JsonDir)
	}

	if !fileExists(m.TempDir) {
		valid = false
		log.Fatal("temp Dir is missing ", m.TempDir)
	}

	// convert to absolute path : fileDir
	p, e := filepath.Abs(m.UploadsDir.FileDir)
	if e != nil {
		valid = false
		log.Fatal("bad upload file dir", m.UploadsDir.FileDir, e)
	}
	m.UploadsDir.FileDir = p + string(os.PathSeparator) //change it to absolute dir

	// convert to absolute path : jpgDir
	p, e = filepath.Abs(m.UploadsDir.JpgDir)
	if e != nil {
		valid = false
		log.Fatal("bad jpg file dir", m.UploadsDir.JpgDir, e)
	}
	m.UploadsDir.JpgDir = p + string(os.PathSeparator) //change it to absolute dir

	// convert to absolute path : thumbDir
	p, e = filepath.Abs(m.UploadsDir.ThumbDir)
	if e != nil {
		valid = false
		log.Fatal("bad thumbnail dir", m.UploadsDir.ThumbDir, e)
	}
	m.UploadsDir.ThumbDir = p + string(os.PathSeparator) //change it to absolute dir

	// convert to absolute path : PdfDir
	p, e = filepath.Abs(m.UploadsDir.PdfDir)
	if e != nil {
		valid = false
		log.Fatal("bad pdf file dir", m.UploadsDir.PdfDir, e)
	}
	m.UploadsDir.PdfDir = p + string(os.PathSeparator) //change it to absolute dir

	// convert to absolute path : JsonDir
	p, e = filepath.Abs(m.UploadsDir.JsonDir)
	if e != nil {
		valid = false
		log.Fatal("bad pdf file dir", m.UploadsDir.JsonDir, e)
	}
	m.UploadsDir.JsonDir = p + string(os.PathSeparator) //change it to absolute dir

	// convert to absolute path : TmpDir
	p, e = filepath.Abs(m.TempDir)
	if e != nil {
		valid = false
		log.Fatal("bad TempDir dir", m.TempDir, e)
	}
	m.TempDir = p + string(os.PathSeparator) //change it to absolute dir
	return
}

func (m *configuration) getAvatarPath() (ret string) {
	for _, v := range m.Static {
		if strings.ToLower(v.Dir) == "avatar" {
			return v.Dir //found it
		}
	}
	return ""
}