local class =  require("class")
local DebugWindow = require("debug_overlay.debugwindow")
local ECS = require("ecs.ECS")
require "imgui"

local ECSDebug = class(DebugWindow)

function ECSDebug:init()
    self.ecs = ecs
    self.once = true
end

function ECSDebug:render()
    imgui.Begin("ECS")
    imgui.BeginChild("Entity table", 0,-imgui.GetItemsLineHeightWithSpacing()*2)
        imgui.Columns(ecs.n_components+1)
        imgui.SetColumnOffset(1, 64)
        -- Header
        imgui.TextUnformatted("Entities")
        imgui.NextColumn()
        for i,v in pairs(ecs.components) do
            imgui.TextUnformatted(string.format("%s", i))
            imgui.NextColumn()
        end
        imgui.Separator()
        for i=0,ECS.N_ENTITIES-1 do
            if ecs.entities[i] then
                imgui.TextUnformatted(string.format("%d", i))
                imgui.NextColumn()
                for j,c in pairs(ecs.components) do
                    if c[i]._alive then
                        imgui.TextUnformatted(tostring(c[i]))
                    else
                        imgui.NewLine()
                    end
                    imgui.NextColumn()
                end
            end
        end
    imgui.EndChild()
    imgui.End()
end

return ECSDebug