local BattleHelper = require "app/module/battle/helper/battle_helper"
local BattleConst = require "app/module/battle/battle_const"

local BattleFormula = {}

local DEFAULT_FACTOR = 10000
local HURT_STATE_CRIT = BattleConst.HURT_STATE_CRIT

function BattleFormula:getDamageOrCureResult(unitComp, buff, targetUnitComp)
	local func = self.calculateFormula[buff:getFormula()]
	if func then
		return func(unitComp, buff, targetUnitComp)
	end
	return 0
end

BattleFormula.calculateFormula = {
	-- （攻击）*技能倍率*(1+(攻击者元素伤害增加+所有伤害增加）（攻击者）+(受到元素伤害增加+受到所有伤害增加（受击）-受到元素伤害降低-受到所有伤害降低（受击）*暴击伤害
	[1] = function(unitComp, buff, targetUnit)
		local result = unitComp.unitEntity:getAtk() * buff:getEffectNum() // DEFAULT_FACTOR *
						(DEFAULT_FACTOR + unitComp.unitEntity:getDmgAddition() + targetUnit.unitEntity:getWeakness() - targetUnit.unitEntity:getDmgDec()) // DEFAULT_FACTOR
		local hurtState = 0
		local crit = unitComp.unitEntity:getCrit()
		if crit > 0 then
			if BattleHelper:random(1, DEFAULT_FACTOR) <= crit then -- 暴击了
				result = result * (DEFAULT_FACTOR + unitComp.unitEntity:getCrittime()) // DEFAULT_FACTOR
				hurtState = HURT_STATE_CRIT
			end
		end
		return result, hurtState
	end,
	-- 生命值*回合开始时的回血系数*(1 + 治疗效果增加)
	[2] = function(unitComp,  buff, targetUnit)
		local result = targetUnit.unitEntity:getMaxHp() * buff:getEffectNum() // DEFAULT_FACTOR * (unitComp.unitEntity:getCureAddition() + DEFAULT_FACTOR) // DEFAULT_FACTOR
		return result, 0
	end,
	-- 角色攻击力*技能倍率*(1+治疗效果增加)
	[3] = function(unitComp,  buff, targetUnit)
		local result = unitComp.unitEntity:getAtk() * buff:getEffectNum() // DEFAULT_FACTOR * (unitComp.unitEntity:getCureAddition() + DEFAULT_FACTOR) // DEFAULT_FACTOR
		return result, 0
	end
}

return BattleFormula