package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"os"

	"gitlab.com/EternalWanderer/dice-roller/Colors"
	"gitlab.com/EternalWanderer/dice-roller/Dice"
)

var (
	path, skillString, saveString, checkString string
	modifier, diceThrows, surfaces             int
	char                                       Character
	skillMap                                   = make(map[string]int)
	statMap                                    = make(map[string]int)
	advantage, disadvantage                    bool
)

func parseFlags() {
	flag.StringVar(&path, "file", "stats.json", "fock me")
	flag.StringVar(&path, "f", "stats.json", "fock me")
	flag.StringVar(&skillString, "skill", "athletics", "Skill to parse")
	flag.StringVar(&checkString, "check", "strength", "Stat check")
	flag.StringVar(&saveString, "save", "strength", "Saving throw to... throw")
	flag.BoolVar(&advantage, "advantage", advantage, "Roll with advantage")
	flag.BoolVar(&disadvantage, "disadvantage", disadvantage, "Roll with disadvantage")
	flag.Parse()
}

func isError(err error) bool {
	if err != nil {
		fmt.Println(err.Error())
	}
	return (err != nil)
}

func readJson() {
	fmt.Println("Opening file:", path)
	var file, err = os.Open(path)
	if isError(err) {
		return
	}
	defer file.Close()

	byteValue, _ := ioutil.ReadAll(file)
	json.Unmarshal(byteValue, &char)
}

func initMaps() {
	for i := 0; i < len(char.Skills); i++ {
		skillMap[char.Skills[i].SkillName] = i
	}

	for i := 0; i < len(char.Stats); i++ {
		statMap[char.Stats[i].StatName] = i
	}
}

func main() {
	parseFlags()
	readJson()
	initMaps()

	fmt.Println("Skill check:", skillString)
	fmt.Println(skillCheck(getSkill(skillString)))
	fmt.Println("Stat check", checkString)
	fmt.Println(statCheck(getStat(checkString)))
	fmt.Println("Saving throw", saveString)
	fmt.Println(savingThrow(getStat(saveString)))
	fmt.Println("Proficiency")
	fmt.Println(getProficiency())
}

func getProficiency() int {
	return (char.Misc.Level-1)/4 + 2
}

func getSkill(skillName string) Skill {
	return char.Skills[skillMap[skillName]]
}

func getStat(statName string) Stat {
	return char.Stats[statMap[statName]]
}

func getModifier(stat Stat) int {
	return (stat.Score - 10) / 2
}

func rollDice() int {
	var die, x, y int
	switch {
	case advantage:
		die, x, y = Dice.Advantage()
	case disadvantage:
		die, x, y = Dice.Disadvantage()
	default:
		die = Dice.SimpleCast()
	}
	fmt.Printf("%s%d%s\tx: %d\ty: %d\n", Colors.ColorGreen, die, Colors.ColorReset, x, y)
	return die
}

func statCheck(stat Stat) int {
	return rollDice() + getModifier(stat)

}

func savingThrow(stat Stat) int {
	die := rollDice()

	if stat.Proficient {
		die += getModifier(stat)
	}
	return die
}

func skillCheck(skill Skill) int {
	var die, x, y int
	switch {
	case advantage:
		die, x, y = Dice.Advantage()
	case disadvantage:
		die, x, y = Dice.Disadvantage()
	default:
		die = Dice.SimpleCast()
	}
	fmt.Printf("%s%d%s\tx: %d\ty: %d\n", Colors.ColorGreen, die, Colors.ColorReset, x, y)

	die += getModifier(getStat(skill.BaseStat))

	switch {
	case skill.Expertise:
		die += getProficiency() * 2
	case skill.Proficient:
		die += getProficiency()
	}
	return die
}