Monster = {name = 'Monster', health = 100, image = 'gfx/weiwen/circle.png', scalex = 1, scaley = 1, atk = 1, def = 1, spd = 5, x = 0, y = 0, ang = 0, imgang = 0, exp = 5, money = 50, type = 'monster', loot = {}}
MONSTERS = {}
local t = 0

local SPAWNS = {
     FULLMAP = {{1, 34}, {18, 51}},
     BOTTOMHALF = {{9, 58}, {64, 58}},
     BOTTOMMAP = {{5, 71}, {55, 70}},
}

CONFIG.MONSTERS = {
	{
		name = 'Zombie', health = 100, image = 'gfx/minecraft_npc/zombie.png', scalex = 2, scaley = 2, r = 136, g = 224, b = 32, 
		atk = 1.9, def = 2.1, spd = 6, atkspd = 8, x = 0, y = 0, ang = 0, imgang = 0, runat = 10, 
		spawnchance = {['rpg_mapb'] = {5}}, 
		spawn = {
			['rpg_mineraft'] = {SPAWNS.BOTTOMHALF}
		}, 
		exp = 25, money = 67, loot = {{chance = 5000, id = 102}, {chance = 250, id = 221}}, 
	}, 
	{
		name = 'Spider', health = 100, image = 'gfx/minecraft_npc/spider.png', scalex = 2, scaley = 2, 
		atk = 2.2, def = 1.8, spd = 6, atkspd = 8, x = 0, y = 0, ang = 0, imgang = 0, runat = 10,  
		spawnchance = {['rpg_mapb'] = {5}}, 
		spawn = {
			['rpg_mapb'] = {SPAWNS.BOTTOMMAP}
		}, 
		exp = 34, money = 24, loot = {{chance = 5000, id = 100}, {chance = 250, id = 222}}, 
	}, 
	{
		name = 'Creeper', health = 100, image = 'gfx/minecraft_npc/creeper.png', scalex = 2, scaley = 2, 
		atk = 1.9, def = 2.3, spd = 6, atkspd = 8, x = 0, y = 0, ang = 0, imgang = 0, runat = 10, 
		spawnchance = {['rpg_minecraft'] = {5}}, 
		spawn = {
			['rpg_mapb'] = {SPAWNS.FULLMAP}
		}, 
		exp = 45, money = 78, loot = {{chance = 5000, id = 101}, {chance = 250, id = 223}}, 
		spc = {1000, function(self) 
			if self.health < 20 then
				radiusmsg("Creeper uses selfdestruct!", self.x, self.y)
				parse('explosion ' .. self.x .. ' ' .. self.y .. ' 128 80')
				parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' 100 128 255 128 0')
				parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' 100 128 255 255 0')
				self:destroy()
			end
		end},
	}, 
	{
		name = 'Zombie Pigman', health = 100, image = 'gfx/minecraft_npc/zombie pigman.png', scalex = 1.5, scaley = 1.5, r = 104, g = 152, b = 40, 
		atk = 3.1, def = 2.2, spd = 7, atkspd = 10, x = 0, y = 0, ang = 0, imgang = 0, runat = 20, 
		spawnchance = {['rpg_minecraft'] = {32}}, 
		spawn = {
			['rpg_mapb'] = {SPAWNS.FULLMAP}
		}, 
		exp = 5, money = 30, loot = {{chance = 8000, id = 1}},
		spc = {750, function(self, id, dist) 
			if dist <= 96 then
				radiusmsg("Zombie Pigman uses horn attack!", self.x, self.y)
				self:hit(id, 20)
			end
		end},
	}, 
	{
		name = 'Skeleton', health = 100, image = 'gfx/minecraft_npc/skeleton.png', scalex = 1.5, scaley = 1.5, r = 104, g = 152, b = 40, 
		atk = 2.2, def = 1.1, spd = 7, atkspd = 10, x = 0, y = 0, ang = 0, imgang = 0, runat = 20, 
		spawnchance = {['rpg_mapb'] = {100}}, 
		spawn = {
			['rpg_minecraft'] = {SPAWNS.FULLMAP}
		}, 
		exp = 100, money = 100, loot = {{chance = 8000, id = 1}},
		spc = {750, function(self, id, dist) 
			radiusmsg("Skeleton uses arrow!", self.x, self.y)
			parse('explosion ' .. self.x .. ' ' .. self.y .. ' 96 40')
			parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' 100 96 255 255 255')
			parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' 75 96 128 128 255')
		end},
	}, 
}

CONFIG.MONSTERSKILLS = {
     endAgility = function(id)
          self = MONSTERS[tonumber(id)]
          self.spd = self._spd
          self._spd = nil
          imagecolor(self.image, 255, 255, 255)
          self.agility = nil
     end,
     endRage = function(id)
          self = MONSTERS[tonumber(id)]
          self.atk = self._atk
          self._atk = nil
          imagecolor(self.image, 255, 255, 255)
          self.rage = nil
     end,
     endHarden = function(id)
          self = MONSTERS[tonumber(id)]
          self.def = self._def
          self._def = nil
          imagecolor(self.image, 255, 255, 255)
          self.harden = nil
     end,
}

addhook("attack", "MONSTERattack")
function MONSTERattack(id)
     if gettile(PLAYERS[id].x, PLAYERS[id].y).SAFE or gettile(PLAYERS[id].x, PLAYERS[id].y).NOMONSTERS then
          return
     end
     if inarray({400, 401, 402, 403, 404}, PLAYERS[id].Equipment[7]) then
          message(id, "You may not attack on a horse.")
          return
     end
     local weapon, closest = player(id, 'weapontype')
     for _, m in ipairs(MONSTERS) do
          local x, y = player(id, 'x'), player(id, 'y')
          local dist = math.sqrt((m.x-x)^2+(m.y-y)^2)
          if dist <= (closest and closest[2] or (CONFIG.WEAPONRANGE[weapon] or CONFIG.WEAPONRANGE[50])) then
               local rot = player(id, 'rot')
               if math.abs(math.rad(rot) - math.atan2(y-m.y, x-m.x) + math.pi/2)%(2*math.pi) <= (CONFIG.WEAPONWIDTH[weapon] or CONFIG.WEAPONRANGE[50]) then
                    closest = {m, dist}
               end
          end
     end
     if closest then
          closest[1]:damage(id, math.ceil(20*((PLAYERS[id].Level+50)*PLAYERS[id].tmp.atk/closest[1].def)/math.random(60, 140)), weapon)
     end
end

addhook("ms100", "MONSTERms100")
function MONSTERms100()
     t = t + 1
     if t % 100 == 0 then
          while #MONSTERS < CONFIG.MAXMONSTERS do
               local rand, spawnNo, mapName
               while true do 
                    rand = math.random(#CONFIG.MONSTERS)
                    mapName = CONFIG.MONSTERS[rand].spawn[map'name'] and map'name' or CONFIG.DEFAULTMAP
                    spawnNo = math.random(#CONFIG.MONSTERS[rand].spawn[mapName])
                    if math.random(0, 100) < CONFIG.MONSTERS[rand].spawnchance[mapName][spawnNo] then
                         break
                    end
               end 
               local m = deepcopy(CONFIG.MONSTERS[rand])
               local x, y, tilex, tiley
               local spawn = m.spawn[mapName][spawnNo]
               repeat
                    tilex, tiley = math.random(spawn[1][1], spawn[2][1]), math.random(spawn[1][2], spawn[2][2])
               until not gettile(tilex, tiley).SAFE and 
                      not gettile(tilex, tiley).NOMONSTERS and 
                      tile(tilex, tiley, "walkable") and 
                      tile(tilex, tiley, "frame") ~= 34
               m.x, m.y = math.floor(tilex*32+16), math.floor(tiley*32+16)
               Monster:new(m)
          end
     end
     for _, m in ipairs(MONSTERS) do
          if t % m.atkspd == 0 then
               m.target = nil
               local closest
               for _, p in ipairs(table.shuffle(player(0, 'table'))) do
                    if player(p, 'health') > 0 and 
                         not gettile(PLAYERS[p].x, PLAYERS[p].y).SAFE and 
                         not gettile(PLAYERS[p].x, PLAYERS[p].y).NOMONSTERS then
                         local dist = math.sqrt((player(p, 'x')-m.x)^2 + (player(p, 'y')-m.y)^2)
                         if dist < 400 then
                              if not closest or dist < closest[2] then
                                   closest = {p, dist}
                              end
                         end
                    end
               end
               if closest then
                    local dist = closest[2]
                    if dist < 400 then
                         m.target = closest[1]
                         if m.spc and math.random(10000) <= m.spc[1] then
                              m.spc[2](m, m.target, dist)
                         elseif dist <= (m.range or 32) then
                              m:hit(m.target, 10)
                         end
                    end
               end
          end
          m.imgang = math.sin(t/2.5*math.pi) * 15
          if m.target and player(m.target, 'exists') and player(m.target, 'health') > 0 and 
               not gettile(PLAYERS[m.target].x, PLAYERS[m.target].y).SAFE and 
               not gettile(PLAYERS[m.target].x, PLAYERS[m.target].y).NOMONSTERS then
               xdist, ydist = player(m.target, 'x') - m.x, player(m.target, 'y') - m.y
               local dist = math.sqrt(xdist^2 + ydist^2)
               if dist < 400 then
                    m.ang = math.atan2(ydist, xdist)-math.pi/2+math.random(-1, 1)/2
               else
                    m.target = nil
               end
          end
          if not m.target then
               m:rot(math.random(-1, 1)/2)
          end
          if not m:move(m:rot(), m.health > m.runat and 1 or -1) then
               repeat until m:move(math.rad(math.random(360)), 1)
          end
     end
end

function Monster:new(m)
     if not (m.x or m.y) then return false end
     m.image = image(m.image, m.x, m.y, 0)
     imagescale(m.image, m.scalex, m.scaley)
     setmetatable(m, self)
     self.__index = self
     local n = #MONSTERS+1
     MONSTERS[#MONSTERS+1] = m
     m.id = n
     return m
end

function Monster:pos(x, y)
     if not x and not y then
          return self.x, self.y
     else
          self.x, self.y = x or self.x, y or self.y
          imagepos(self.image, self.x, self.y, self.imgang)
     end
     return true
end

function Monster:move(dir, amt)
     local x, y = -math.sin(dir)*amt*self.spd, math.cos(dir)*amt*self.spd
     local x, y = self.x+x, self.y+y
     local tilex, tiley = math.floor(x/32), math.floor(y/32)
     if tile(tilex, tiley, 'walkable') and tile(tilex, tiley, 'frame') ~= 34 and 
          not gettile(tilex, tiley).SAFE and 
          not gettile(tilex, tiley).NOMONSTERS then
          self:pos(x, y)
          return true
     else
          self:rot(math.random(-1, 1)*math.pi/2)
          return false
     end
end

function Monster:damage(id, dmg, wpntype)
     if not PLAYERS[id].Tutorial.damagem then
          message(id, "You have attacked a monster! Good job! Keep on attacking it until it dies.", "255128000")
          PLAYERS[id].Tutorial.damagem = true
     end
     local wpnName
     if weapon == 251 then
          wpnName = 'rune'
     elseif weapon == 46 then
          wpnName = 'firewave'
          dmg = dmg/5
     else
          wpnName = PLAYERS[id].Equipment[3] and ITEMS[PLAYERS[id].Equipment[3]].name or 'dagger'
     end
     self.health = self.health - dmg
     --print(player(id, 'name') .. ' deals ' .. dmg .. ' damage to ' .. self.name .. ' usng a ' .. wpnName .. '.')
     if self.health <= 0 then
          if not PLAYERS[id].Tutorial.killm then
               message(id, "Congratulation! You have killed your first monster. You can proceed to pick up the loot by using the drop weapon button (default G)", "255128000")
               PLAYERS[id].Tutorial.killm = true
          end
          addexp(id, math.floor(self.exp*CONFIG.EXPRATE))
          self:die()
     else
          parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' 0 ' .. self.scaley .. ' ' .. (self.r and (self.r .. ' ' .. self.g .. ' ' .. self.b) or '192 0 0'))
     end
     radiussound("weapons/machete_hit.wav", self.x, self.y)
     return true
end

function Monster:hit(id, dmg)
     if not PLAYERS[id].Tutorial.hitm then
          message(id, "A monster is attacking you! You can fight back by swinging your weapon at it.", "255128000")
          PLAYERS[id].Tutorial.hitm = true
     end
     if player(id, 'weapontype') == 41 and (math.abs(math.rad(player(id, 'rot')) - math.atan2(player(id, 'y')-self.y, player(id, 'x')-self.x) + math.pi/2)%(2*math.pi) <= math.pi*2/3) then
          EXPhit(id, self, -1, dmg/4)
          radiussound("weapons/ricmetal" .. math.random(1,2) .. ".wav", self.x, self.y)
     else
          EXPhit(id, self, -1, dmg)
          radiussound("weapons/knife_hit.wav", self.x, self.y)
     end
     return true
end

function Monster:die(id)
     local size = self.scalex+self.scaley
     parse('effect "colorsmoke" ' .. self.x .. ' ' .. self.y .. ' ' .. size .. ' 64 ' .. (self.r and (self.r .. ' ' .. self.g .. ' ' .. self.b) or '192 0 0'))
     local tilex, tiley = math.floor(self.x/32), math.floor(self.y/32)
     spawnitem(1337, tilex, tiley, math.floor(self.money*math.random(50, 150)/100)*CONFIG.MONEYRATE)
     for _, loot in ipairs(self.loot) do
          local chance = math.random(10000)
          if chance <= loot.chance then
               spawnitem(loot.id, tilex, tiley)
          end
     end
     radiussound("weapons/c4_explode.wav", self.x, self.y)
     self:destroy()
end

function Monster:destroy()
     freeimage(self.image)
     local found
     table.remove(MONSTERS, self.id)
     for i, m in ipairs(MONSTERS) do
          m.id = i
     end
     return true
end

function Monster:rot(rot)
     if not rot then
          return self.ang
     else
          self.ang = (self.ang+rot)%(math.pi*2)
     end
     return true
end