---@module 'obj/Area'

---@class Area:Object
---@field room Room
---@field game_objects GameObject[]
---@field world table|nil
local Area = Object:extend()

---Instantiates area
function Area:new(room)
    self.room = room
    self.game_objects = {}
    self.world = nil
end

---Updates area
---@param dt number
function Area:update(dt)
    for i = #self.game_objects, 1, -1 do
        local game_object = self.game_objects[i]

        game_object:update(dt)

        if game_object:isDead() then
            table.remove(self.game_objects, i)
        end
    end
end

---Draws area
function Area:draw()
    for _, game_object in ipairs(self.game_objects) do game_object:draw() end
end

---Destroys area
function Area:destroy()
    for i = #self.game_objects, 1, -1 do
        local game_object = self.game_objects[i]
        game_object:kill()
        table.remove(self.game_objects, i)
    end
    self.game_objects = {}

    if self.world then self.world = nil end
end

---Adds game object to area
---@param game_object_type string name of game object's class
---@param x number|nil horizontal position
---@param y number|nil vertical position
---@param opts table|nil additional arguments
function Area:addGameObject(game_object_type, x, y, opts)
    local game_object = _G[game_object_type](self, x or 0, y or 0, opts or {})
    table.insert(self.game_objects, game_object)
    return game_object
end

---Initializes HC collision manager as a world
---@param cell_size number|nil
function Area:addCollisionManager(cell_size)
    self.world = HC(cell_size or 100)
end

return Area