Explaining this placement system code?

I found this code for a placement system and I would like someone to break it down and explain it to me. Copying this code and adding -- tags to explain each section would be really useful. Thanks in advance.

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local moves = false
local i = .5

for _,buttons in pairs(script.Parent:GetChildren()) do
    if buttons:IsA("TextButton") then
        buttons.MouseButton1Click:connect(function()
            moves = true
            if mouse.TargetFilter ~= nil then
                return
            end
            local typeOf = game.ReplicatedStorage:FindFirstChild(buttons.Name)
            if not typeOf then
                return
            end
            print'test1'
            if script.Parent.Money.Gross.Value >= typeOf.Cost.Value then
                script.Parent.Money.Gross.Value = script.Parent.Money.Profit.Value - typeOf.Cost.Value
            buttons.Text = 'Left Click to Place'
            local building = typeOf:Clone()
            building.Parent = workspace
            mouse.TargetFilter = building
            building:MakeJoints()
            local money = building.Cost

            script.Parent.Money.Gross.Value = script.Parent.Money.Gross.Value+money.Value
            script.Parent.Money.Profit.Value = script.Parent.Money.Profit.Value+(money.Value*2)
            print'test2'

            local move = mouse.Move:connect(function()
                local base = workspace:FindFirstChild(player.Name..'base')
                if mouse.Target.Name ~= base.Name then
                    error('error')
                    return
                end
                if moves == true then
                local x = math.floor(mouse.Hit.x)+1
                local y = math.floor(mouse.Hit.y)+.5
                local z = math.floor(mouse.Hit.z)+1
                building:SetPrimaryPartCFrame(CFrame.new(x,y,z))
                building:SetPrimaryPartCFrame(CFrame.new(x,y,z)*CFrame.Angles(0,math.pi*i,0))
                local key, gpe = game:getService('UserInputService').InputBegan:wait()
                if not gpe then
                    if key.KeyCode == Enum.KeyCode.R then
                        building:SetPrimaryPartCFrame(CFrame.new(x,y,z)*CFrame.Angles(0,math.pi*i,0))
                        i = i +.5
                        if i==2.5 then
                            i = .5
                        end
                    end
                end
                print 'test3'
                end
            end)
            end
        end)

            mouse.Button1Down:connect(function()
                if mouse.Target == nil then
                    return
                end
                if moves == true then
            buttons.Text = buttons.Name
            mouse.TargetFilter = nil
            script.Disabled = true
            wait()
            script.Disabled = false
            moves = false
                elseif not moves then
                    return
                end
                print 'test4'
            end)
    end
    end