// analyze.go contains all data analysis
package main

import (
	"fmt"
)

// Data for Month
type Month struct {
	Month int
	MonthName string
	Year int
	Days []int

	Earnings float64

	Workvalue float64
	Workhours float64
	//Workdays int
	Tasks []int
	Projects []int
}

// Yearly Data
type Year struct {
	Year int
	Months []int
	Days []int

	Earnings float64

	Workvalue float64
	Workhours float64

	Tasks []int
	Projects []int
}

var analysis []Month
var yearly   []Year

//Analyze all tasks and PAyments 
func MakeAnalysis() {
	fmt.Println("Making Analysis")
	analysis = nil
	yearly = nil

	tids := GetTaskIds()
	alltasks := GetSelectedTasks(tids)

	for _,ta := range alltasks {
		year,monthn,day := ta.Start.Local().Date()
		month := int(monthn)
		monthstr := fmt.Sprintf("%v",monthn)
		exist, exid := MonthExists(year,month)
		dur := ta.Duration()
		val := ta.Money()

		if exist {
			if !isElement(day,analysis[exid].Days){
				analysis[exid].Days = append(analysis[exid].Days,day)
			}
			analysis[exid].Workvalue += val
			analysis[exid].Workhours += dur
			analysis[exid].Tasks = append(analysis[exid].Tasks,ta.Id)
			if !isElement(ta.Projectid,analysis[exid].Projects){
				analysis[exid].Projects = append(analysis[exid].Projects,ta.Projectid)
			}
		}else{
			analysis = append(analysis,Month{
				month,
				monthstr,
				year,
				[]int{day},

				0.0,  //Earning

				val,  // Workvalue
				dur,  //Workhours
				[]int{ta.Id},[]int{ta.Projectid}})
		}

	}
	pays := GetAllPayments()
	for _,py := range pays {
		year,monthn,_ := py.Date.Local().Date()
		month := int(monthn)
		monthstr := fmt.Sprintf("%v",monthn)
		exist, exid := MonthExists(year,month)

		if exist {
			analysis[exid].Earnings += py.Amount
		}else{
			analysis = append(analysis,Month{
				month,
				monthstr,
				year,
				[]int{},

				py.Amount,  //Earning

				0.0,  //Workvalue
				0.0,  //Workhours
				[]int{},
				[]int{}})
		}
	}
	//fmt.Println("Length:",len(analysis))
	for _,mo := range analysis {
		exist,exid := YearExists(mo.Year)

		if exist{
			yearly[exid].Months = append(yearly[exid].Months,mo.Month)
			yearly[exid].Days = append(yearly[exid].Days,mo.Days...)
			//yearly[exid].Days = AddNewElement(yearly[exid].Days,mo.Days)

			yearly[exid].Earnings += mo.Earnings

			yearly[exid].Workvalue += mo.Workvalue
			yearly[exid].Workhours += mo.Workhours

			yearly[exid].Tasks = AddNewElement(yearly[exid].Tasks,mo.Tasks)
			yearly[exid].Projects = AddNewElement(yearly[exid].Projects,mo.Projects)
		}else{
			yearly = append(yearly,Year{
				mo.Year,
				[]int{mo.Month},
				mo.Days,

				mo.Earnings,

				mo.Workvalue,
				mo.Workhours,

				mo.Tasks,
				mo.Projects})
		}
	}

	ShowMonthlyAnalysis()
	ShowYearlyAnalysis()
}


//Show Yearly analysis
func ShowYearlyAnalysis() {
	fmt.Println(frame("Yearly Analysis",true))
	for _,yr := range yearly {
		cnt, hr, dur := AnalyzeTasks(GetSelectedTasks(yr.Tasks))

		fmt.Println(sli,yr.Year)
		fmt.Printf("%s    Workhours: %.2f[h]\n",nli,yr.Workhours)
		fmt.Printf("%s     Earnings: %.2f[€]\n",nli,yr.Earnings)
		fmt.Printf("%s               %.2f[€/m]\n",nli,yr.Earnings/float64(len(yr.Months)))
		fmt.Printf("%s    Workvalue: %.2f[€]\n",nli,yr.Workvalue)
		fmt.Printf("%s               %.2f[€/m]\n",nli,yr.Workvalue/float64(len(yr.Months)))
		fmt.Printf("%s     Projects: %v\n",nli,len(yr.Projects))
		fmt.Printf("%s         Days: %v\n",nli,len(yr.Days))
		fmt.Printf("%s        Tasks: %v Hours: %.2f[h]\n",nli,cnt, hr)
		fmt.Printf("%s               %s\n",nli,dur)
		fmt.Printf("%s  Hourly Rate: %.2f[€/h]\n",nli,yr.Earnings/yr.Workhours)
		fmt.Printf("%s Productivity: %.2f[h/d]\n",nli,yr.Workhours/float64(len(yr.Days)))
		fmt.Printf("%s               %.2f[h/m]\n",nli,yr.Workhours/float64(len(yr.Months)))
		fmt.Printf("%s               %.2f[d/m]\n",nli,float64(len(yr.Days))/float64(len(yr.Months)))

		fmt.Println(nli)
	}
	fmt.Println(frame("",false))
}
//Show Mothly analysis
func ShowMonthlyAnalysis() {
	fmt.Println(frame("Monthly Analysis",true))
	for _,mo := range analysis {
		cnt, hr, dur := AnalyzeTasks(GetSelectedTasks(mo.Tasks))

		fmt.Println(sli,mo.Year,mo.MonthName)
		fmt.Printf("%s    Workhours: %.2f[h]\n",nli,mo.Workhours)
		fmt.Printf("%s     Earnings: %.2f[€]\n",nli,mo.Earnings)
		fmt.Printf("%s    Workvalue: %.2f[€]\n",nli,mo.Workvalue)
		fmt.Printf("%s     Projects: %v\n",nli,len(mo.Projects))
		fmt.Printf("%s         Days: %v\n",nli,len(mo.Days))
		fmt.Printf("%s        Tasks: %v Hours: %.2f[h]\n",nli,cnt, hr)
		fmt.Printf("%s               %s\n",nli,dur)
		fmt.Printf("%s  Hourly Rate: %.2f[€/h]\n",nli,mo.Earnings/mo.Workhours)
		fmt.Printf("%s Productivity: %.2f[h/d]\n",nli,mo.Workhours/float64(len(mo.Days)))

		fmt.Println(nli)
	}
	fmt.Println(frame("",false))
}


// Test if analysis slice conatins the month already and return its id if
func MonthExists(year, month int) (exist bool, id int) {
	for i,mo := range analysis {
		if mo.Month == month && mo.Year == year {
			return true,i
		}
	}
	return false,-1
}

// Test if yearly slice conatins the year already and return its id if
func YearExists(year int) (exist bool, id int) {
	for i,yr := range yearly {
		if yr.Year == year {
			return true,i
		}
	}
	return false,-1
}