local doors = {}

function artifact.rotate_selectionbox(box, rot)
    local a = vector.new(box[1], box[2], box[3]):rotate(rot)
    local b = vector.new(box[4], box[5], box[6]):rotate(rot)
    return {
        a.x, a.y, a.z,
        b.x, b.y, b.z
    }
end

minetest.register_entity(":artifact:door", {
    initial_properties = {
        visual = "mesh",
        mesh = "artifact_door.gltf",
        textures = {"artifact_door_wood.png"},
        selectionbox = {
            -0.5, -0.5, -0.5,
             0.5,  1.5, -6/16
        }
    },
    _interact_time = 0.2,
    _interact_marker_offset = function(e)
        return (e._open and vector.new(-0.5, 0.5, 0) or vector.new(0, 0.5, 0.5)):rotate(e.object:get_rotation())
    end,
    on_activate = function(e, data)
        local node = minetest.get_node(e.object:get_pos())
        if not node.name:find "door" then
            e.object:remove()
            return
        end
        e.object:set_armor_groups{immortal = 1}
        extend(e, minetest.deserialize(data) or {})
        if e.type == "iron" then
            if e._locked == nil then
                e._locked = true
            end
            e.object:set_properties {
                textures = {"artifact_door_iron.png"},
            }
        end
        if e.rotation then
            e.rotation.y = e.rotation.y +math.pi
            e:rotate(e.rotation)
        end
        if e._locked then
            e._no_interact = true
        end
        e._name = ""..math.random()
        local nm = minetest.get_meta(e.object:get_pos())
        if (node.name:find "_open") and not e._open then
            e:open(true)
        elseif not (node.name:find "_open") and e._open then
            e:close(true)
        end
        doors[e.object:get_pos():round():to_string()] = e
    end,
    on_deactivate = function(e)
        doors[e.object:get_pos():round():to_string()] = nil
    end,
    on_interact = function(e)
        if e._locked then return end
        if e._open then
            e:close()
        else
            e:open()
        end
    end,
    open = function(e, snap)
        if e._open then return end
        e._open = true
        e._no_interact = true
        e._name = ""..math.random()
        e.object:set_animation({x=snap and 0.5 or 0,y=0.5}, 1.5, 0.1, false)
        minetest.after(snap and 0 or 0.1, function()
            local pos = e.object:get_pos():round()
            local node = minetest.get_node(pos)
            node.name = "door_"..e.type.."_open"
            minetest.swap_node(pos, node)
            e.object:set_properties {
                selectionbox = artifact.rotate_selectionbox({
                    0.5, -0.5, -0.5,
                    6/16, 1.5,  0.5
                }, e.rotation)
            }
        end)
        if not e._locked then
            minetest.after(snap and 0 or 0.25, function()
                e._no_interact = nil
            end)
        end
    end,
    close = function(e, snap)
        if not e._open then return end
        e._open = nil
        e._no_interact = true
        e._name = ""..math.random()
        e.object:set_animation({x=snap and 1 or 0.5,y=1}, 1.5, 0.1, false)
        minetest.after(snap and 0 or 0.1, function()
            local pos = e.object:get_pos():round()
            local node = minetest.get_node(pos)
            node.name = "door_"..e.type
            minetest.swap_node(pos, node)
            e.object:set_properties {
                selectionbox = artifact.rotate_selectionbox({
                    -0.5, -0.5, -0.5,
                     0.5,  1.5, -6/16
                }, e.rotation)
            }
        end)
        if not e._locked then
            minetest.after(snap and 0 or 0.25, function()
                e._no_interact = nil
            end)
        end
    end,
    get_staticdata = function(e)
        return minetest.serialize{type = e.type, _locked = e._locked, rotation = e.rotation}
    end,
    unlock = function(e)
        if e._locked then
            e._locked = false
            e._no_interact = nil
        end
    end,
    rotate = function(e, rot)
        e.object:set_rotation(rot)
        rot.y = rot.y -math.pi
        e.rotation = rot
        e.object:set_properties {
            selectionbox = artifact.rotate_selectionbox(e.object:get_properties().selectionbox, e.rotation)
        }
    end
})

local function register_basic_door(type)
    local function onload(pos)
        local m = minetest.get_meta(pos)
        -- Dynamically initialize doors that were mapgen'd in.
        if not m:contains("initialized") then
            m:set_string("initialized", "true")
            local rot = minetest.facedir_to_dir(minetest.get_node(pos).param2):dir_to_rotation()
            rot.y = rot.y -math.pi
            minetest.add_entity(pos, "artifact:door", minetest.serialize{type = type}):get_luaentity():rotate(rot)
        end
    end
    local function ondestruct(pos, reason)
        if reason == "whack" then
            -- TODO: Particles
        end
        doors[pos:to_string()].object:remove()
        doors[pos:to_string()] = nil
    end
    local function onsignal(pos, event)
        local door = doors[vector.to_string(pos)]
        if event.type == "on" then
            if door then
                door:open()
            else
                local node = minetest.get_node(pos)
                node.name = "door_"..e.type.."_open"
                minetest.swap_node(pos, node)
            end
        elseif event.type == "off" then
            if door then
                door:close()
            else
                local node = minetest.get_node(pos)
                node.name = "door_"..e.type.."_open"
                minetest.swap_node(pos, node)
            end
        end
    end
    artifact.register_node("door_"..type, {
        drawtype = "nodebox",
        node_box = {
            type = "fixed",
            fixed = {
                -0.5, -0.5, -0.5,
                 0.5,  1.5, -6/16
            }
        },
        paramtype2 = "facedir",
        tiles = {"blank.png"},
        use_texture_alpha = "clip",
        paramtype = "light",
        pointable = false,
        groups = {call_on_load = 1, whackable = type == "wood" and 1 or nil},
        on_construct = onload,
        on_destruct = ondestruct,
        on_load = onload,
        on_signal = onsignal
    })
    artifact.register_node("door_"..type.."_open", {
        drawtype = "nodebox",
        node_box = {
            type = "fixed",
            fixed = {
                0.5, -0.5, -0.5,
                6/16, 1.5,  0.5
            }
        },
        paramtype2 = "facedir",
        tiles = {"blank.png"},
        use_texture_alpha = "clip",
        paramtype = "light",
        pointable = false,
        groups = {call_on_load = 1, whackable = type == "wood" and 1 or nil},
        on_construct = onload,
        on_destruct = ondestruct,
        on_load = onload,
        on_signal = onsignal
    })
end

register_basic_door("wood")
register_basic_door("iron")