package main

type Board struct {
	Sentinal [4]Card
	Scourge  [4]Card
}

func NewBoard() *Board {
	return &Board{
		Sentinal: [4]Card{nil, nil, nil, nil},
		Scourge:  [4]Card{nil, nil, nil, nil},
	}
}

func (b *Board) GetRow(id int) []Card {
	if id == 1 {
		return b.Sentinal[:]
	} else {
		return b.Scourge[:]
	}
}

func (b *Board) Move(id, src, dest int) bool {
	var brd [4]Card
	if id == 1 {
		brd = b.Sentinal
	} else {
		brd = b.Scourge
	}
	if brd[src] == nil {
		return false
	}
	if brd[dest] != nil {
		return false
	}
	brd[dest] = brd[src]
	brd[src] = nil
	if id == 1 {
		b.Sentinal = brd
	} else {
		b.Scourge = brd
	}
	return true
}

func (b *Board) CanPlay(id int, c *Card, dest int) bool {
	var brd [4]Card
	if id == 1 {
		brd = b.Sentinal
	} else {
		brd = b.Scourge
	}
	if brd[dest] != nil {
		return false
	}
	return true
}

func (b *Board) Play(id int, c *Card, dest int) bool {
	var brd [4]Card
	if id == 1 {
		brd = b.Sentinal
	} else {
		brd = b.Scourge
	}
	if brd[dest] != nil {
		return false
	}
	brd[dest] = *c
	if id == 1 {
		b.Sentinal = brd
	} else {
		b.Scourge = brd
	}
	return true
}

func (b *Board) Attack(id int, atk, def int) int {
	var aBrd [4]Card
	var dBrd [4]Card
	if id == 1 {
		aBrd = b.Sentinal
		dBrd = b.Scourge
	} else {
		aBrd = b.Scourge
		dBrd = b.Sentinal
	}
	if aBrd[atk] == nil || !aBrd[atk].CanAttack(atk, def) {
		return -1
	}
	aBrd[atk].Acted()
	if dBrd[def] == nil {
		//health damage
		if id == 1 {
			b.Sentinal = aBrd
			b.Scourge = dBrd
		} else {
			b.Scourge = aBrd
			b.Sentinal = dBrd
		}
		return 1
	}
	//Do actual battle math
	attacker := aBrd[atk].Value()
	defender := dBrd[def].Value()
	dBrd[def].Acted()
	//check atk buffs
	for i, v := range aBrd {
		if v.Value() == Two {
			attacker = attacker + 1
		}
		if v.Value() == Three && (i == atk-1 || i == atk+1) {
			attacker = attacker + 1
		}
	}
	for i, v := range dBrd {
		if v.Value() == Two {
			defender = defender + 1
		}
		if v.Value() == Three && (i == def-1 || i == def+1) {
			defender = defender + 1
		}
	}
	if attacker > defender {
		dBrd[def] = nil
		if id == 1 {
			b.Sentinal = aBrd
			b.Scourge = dBrd
		} else {
			b.Scourge = aBrd
			b.Sentinal = dBrd
		}
		return 0
	}
	if attacker == defender {
		aBrd[atk] = nil
		dBrd[def] = nil
		if id == 1 {
			b.Sentinal = aBrd
			b.Scourge = dBrd
		} else {
			b.Scourge = aBrd
			b.Sentinal = dBrd
		}
		return 0
	}
	return -1

}