import ctypes

max_name_len = 32

server = ctypes.windll.LoadLibrary("./TJNetworkServer.dll")

class LinkNodes:
    def __init__(self, from_node, to_node):
        self.from_node = from_node
        self.to_node = to_node

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

class Result:
    def __init__(self, ec, v):
        self.error_code = ec
        self.value = v

def c_str(value):
    return ctypes.c_char_p(value.encode())

def c_ref(value):
    return ctypes.byref(value)

# have database
def have_project(name):
    yes = 406
    ec = server.TJ_haveproject(c_str(name))
    return True if ec == yes else False

# create database
def create_project(name):
    return server.TJ_createproject(c_str(name))

# delete database
def delete_project(name):
    return server.TJ_deleteproject(c_str(name))

# create runtime project and connect to database
def open_project(name):
    return server.TJ_openproject(c_str(name))

# delete runtime project and disconnect from database
def close_project(name):
    return server.TJ_closeproject(c_str(name))

def undo(name):
    return server.TJ_undo(c_str(name))

def redo(name):
    return server.TJ_redo(c_str(name))

def get_count(name, object_type):
    count = ctypes.c_int()
    ec = server.TJ_getcount(c_str(name), object_type, c_ref(count))
    return Result(ec, count.value)

def add_node(name, node_id, node_type):
    return server.TJ_addnode(c_str(name), c_str(node_id), node_type)

def delete_node(name, node_id):
    return server.TJ_deletenode(c_str(name), c_str(node_id))

def get_node_id(name, node_index):
    id = ctypes.create_string_buffer(max_name_len)
    ec = server.TJ_getnodeid(c_str(name), node_index, c_ref(id))
    return Result(ec, id.value)

def get_node_coord(name, node_id):
    x = ctypes.c_double()
    y = ctypes.c_double()
    ec = server.TJ_getnodecoord(c_str(name), c_str(node_id), c_ref(x), c_ref(y))
    return Result(ec, Point(x.value, y.value))

def set_node_coord(name, node_id, x, y):
    func = server.TJ_setnodecoord
    func.argtypes = [ctypes.c_char_p, ctypes.c_char_p, ctypes.c_double, ctypes.c_double]
    return func(c_str(name), c_str(node_id), x, y)

def add_link(name, link_id, link_type, from_node, to_node):
    return server.TJ_addlink(c_str(name), c_str(link_id), link_type, c_str(from_node), c_str(to_node))

def delete_link(name, link_id):
    return server.TJ_deletelink(c_str(name), c_str(link_id))

def get_link_id(name, link_index):
    id = ctypes.create_string_buffer(max_name_len)
    ec = server.TJ_getlinkid(c_str(name), link_index, c_ref(id))
    return Result(ec, id.value)

def get_link_nodes(name, link_id):
    from_node = ctypes.create_string_buffer(max_name_len)
    to_node = ctypes.create_string_buffer(max_name_len)
    ec = server.TJ_getlinknodes(c_str(name), c_str(link_id), c_ref(from_node), c_ref(to_node))
    return Result(ec, LinkNodes(from_node.value, to_node.value))