package main

import (
	"bufio"
	"encoding/csv"
	"flag"
	"fmt"
	"html/template"
	"io"
	"log"
	"os"
	"strings"
)

func main() {
	var file = flag.String("file", "", "File to import")
	var output = flag.String("output", "", "File to generate")
	//var columnStart = flag.Int("columnStart", -1, "Column number with a start Datetime")
	//var columnEnd = flag.Int("columnEnd", -1, "Column number with a end Datetime")
	//var columnDescription = flag.Int("columnDescription", -1, "Column number with a descriptive name or similar")
	flag.Parse()

	if _, err := os.Stat(*file); os.IsNotExist(err) || *output == "" {
		flag.Usage()
		return
	}

	fmt.Println("Analyzing " + *file + "...")
	readCsvFile(*file, *output)
}

func readCsvFile(input string, output string) {
	csvFile, _ := os.Open(input)
	reader := csv.NewReader(bufio.NewReader(csvFile))

	type JobDetails struct {
		Id       int
		Name     string
		Type     string
		Provider string
		Start    []string
		End      []string
	}

	type ViewData struct {
		Jobs []JobDetails
	}

	var data ViewData

	id := 0
	for {
		row, err := reader.Read()
		if err == io.EOF {
			break
		}

		id++
		job := JobDetails{
			Id:       id,
			Name:     row[1],
			Type:     row[2],
			Provider: row[0],
			Start:    strings.Split(row[3], ","),
			End:      strings.Split(row[4], ","),
		}

		data.Jobs = append(data.Jobs, job)
	}
	fmt.Println("Scanning done.")

	fmt.Println("Creating template...")
	tpl, err := template.ParseFiles("template.html")
	if err != nil {
		fmt.Println(err)
	}

	outputFile, err := os.Create(output)
	if err != nil {
		log.Println("create file: ", err)
		return
	}
	err = tpl.Execute(outputFile, data)
	if err != nil {
		log.Print("execute: ", err)
		return
	}
	outputFile.Close()
	fmt.Println("Generated " + output)
}