-- Monster Battle -- finished version.
-- Two monsters trade blows until one faints.
-- Run with: lua projects/monster-battle/finished.lua

local Monster = {}
Monster.__index = Monster

function Monster.new(name, hp, attack)
    return setmetatable({ name = name, hp = hp, attack = attack }, Monster)
end

function Monster:isAlive()
    return self.hp > 0
end

function Monster:hit(other)
    local damage = math.random(1, self.attack)
    other.hp = other.hp - damage
    if other.hp < 0 then other.hp = 0 end
    print(self.name .. " hits " .. other.name .. " for " .. damage
        .. ". " .. other.name .. " has " .. other.hp .. " HP left.")
end

local hero = Monster.new("Hero", 30, 8)
local goblin = Monster.new("Goblin", 25, 6)

local round = 1
while hero:isAlive() and goblin:isAlive() do
    print("-- Round " .. round .. " --")
    hero:hit(goblin)
    if goblin:isAlive() then
        goblin:hit(hero)
    end
    round = round + 1
end

if hero:isAlive() then
    print(hero.name .. " wins!")
else
    print(goblin.name .. " wins!")
end