-- This file takes care of cave biomes

noordstar_caves.registered_biomes = {}

-- Clean the input and return a valid shape def
-- If the input is invalid, return nil
local function clean_def(def)
    if type(def.name) ~= "string" then
        return nil
    end
    if type(def.heat_point) ~= "number" then
        return nil
    end
    if type(def.humidity_point) ~= "number" then
        return nil
    end

    local d = {
        name = def.name,
        heat_point = def.heat_point,
        humidity_point = def.humidity_point,
    }

    -- Position
    if type(def.min_pos) == "table" then
        d.minp = {
            x = def.min_pos.x or -1e5,
            y = def.min_pos.y or -1e5,
            z = def.min_pos.z or -1e5,
        }
    elseif type(def.y_min) == "number" then
        d.minp = { x = -1e5, y = def.y_min, z = -1e5 }
    else
        d.minp = { x = -1e5, y = -1e5, z = -1e5 }
    end

    if type(def.max_pos) == "table" then
        d.maxp = {
            x = def.max_pos.x or 1e5,
            y = def.max_pos.y or 1e5,
            z = def.max_pos.z or 1e5,
        }
    elseif type(def.y_max) == "number" then
        d.maxp = { x = 1e5, y = def.y_max, z = 1e5 }
    else
        d.maxp = { x = 1e5, y = 1e5, z = 1e5 }
    end

    -- Optional nodes
    if type(def.node_dust) == "string" then
        d.node_dust = def.node_dust
    end
    if type(def.node_floor) == "string" then
        d.node_floor = def.node_floor
    end
    if type(def.node_wall) == "string" then
        d.node_wall = def.node_wall
    end
    if type(def.node_roof) == "string" then
        d.node_roof = def.node_roof
    end
    if type(def.node_shell) == "string" then
        d.node_shell = def.node_shell
    end
    if type(def.depth_shell) == "number" then
        d.depth_shell = def.depth_shell
    else
        d.depth_shell = 0
    end

    return d
end

function noordstar_caves.register_biome(def)
    local d = clean_def(def)

    if d ~= nil then
        noordstar_caves.registered_biomes[d.name] = d
    end
end

function noordstar_caves.unregister_biome(name)
    noordstar_caves.registered_biomes[name] = nil
end

function noordstar_caves.clear_registered_biomes()
    noordstar_caves.registered_biomes = {}
end