/* Copyright 2009 Myhailo Danylenko

This file is part of lua-lm.

lua-lm is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program.  If not, see <http://www.gnu.org/licenses/>. */

#include <lua.h>

#include <lauxlib.h>

#include <loudmouth/loudmouth.h>

#include <string.h>

#include "config.h"

#include "util.h"

#include "lm_types.h"

#include "lm_message_node.h"

/// lm.message

/// Module, representing individual message.

/// Message have a type and optionally a sub type.

/// Message have a set common methods with message node,

/// these are name, next, prev, parent, value, child, children,

/// find_child, attribute, raw, xml and path. They just save

/// you typing :node() each time and save memory for

/// one node object.

/// message type

/// Message type (root tag type).

/// G:

const string2enum_t type_lm_message[] = {

	{ "message",         LM_MESSAGE_TYPE_MESSAGE         },

	{ "presence",        LM_MESSAGE_TYPE_PRESENCE        },

	{ "iq",              LM_MESSAGE_TYPE_IQ              },

	{ "stream",          LM_MESSAGE_TYPE_STREAM          },

	{ "stream error",    LM_MESSAGE_TYPE_STREAM_ERROR    },

	{ "stream features", LM_MESSAGE_TYPE_STREAM_FEATURES },

	{ "auth",            LM_MESSAGE_TYPE_AUTH            },

	{ "challenge",       LM_MESSAGE_TYPE_CHALLENGE       },

	{ "response",        LM_MESSAGE_TYPE_RESPONSE        },

	{ "success",         LM_MESSAGE_TYPE_SUCCESS         },

	{ "failure",         LM_MESSAGE_TYPE_FAILURE         },

	{ "proceed",         LM_MESSAGE_TYPE_PROCEED         },

	{ "starttls",        LM_MESSAGE_TYPE_STARTTLS        },

	{ "unknown",         LM_MESSAGE_TYPE_UNKNOWN         },

	{ "stream:stream",   LM_MESSAGE_TYPE_STREAM          },

	{ "stream:error",    LM_MESSAGE_TYPE_STREAM_ERROR    },

	{ "stream:features", LM_MESSAGE_TYPE_STREAM_FEATURES },

	{ "stream_error",    LM_MESSAGE_TYPE_STREAM_ERROR    },

	{ "stream_features", LM_MESSAGE_TYPE_STREAM_FEATURES },

	{ NULL,              LM_MESSAGE_TYPE_MESSAGE         },

};

/// message sub type

/// Message subtype, not all combinations of type and subtype are possible.

/// G:

const string2enum_t sub_type_lm_message[] = {

	{ "not set",       LM_MESSAGE_SUB_TYPE_NOT_SET      },

	{ "available",     LM_MESSAGE_SUB_TYPE_AVAILABLE    },

	{ "normal",        LM_MESSAGE_SUB_TYPE_NORMAL       },

	{ "chat",          LM_MESSAGE_SUB_TYPE_CHAT         },

	{ "groupchat",     LM_MESSAGE_SUB_TYPE_GROUPCHAT    },

	{ "headline",      LM_MESSAGE_SUB_TYPE_HEADLINE     },

	{ "unavailable",   LM_MESSAGE_SUB_TYPE_UNAVAILABLE  },

	{ "probe",         LM_MESSAGE_SUB_TYPE_PROBE        },

	{ "subscribe",     LM_MESSAGE_SUB_TYPE_SUBSCRIBE    },

	{ "unsubscribe",   LM_MESSAGE_SUB_TYPE_UNSUBSCRIBE  },

	{ "subscribed",    LM_MESSAGE_SUB_TYPE_SUBSCRIBED   },

	{ "unsubscribed",  LM_MESSAGE_SUB_TYPE_UNSUBSCRIBED },

	{ "get",           LM_MESSAGE_SUB_TYPE_GET          },

	{ "set",           LM_MESSAGE_SUB_TYPE_SET          },

	{ "result",        LM_MESSAGE_SUB_TYPE_RESULT       },

	{ "error",         LM_MESSAGE_SUB_TYPE_ERROR        },

	{ "not_set",       LM_MESSAGE_SUB_TYPE_NOT_SET      },

	{ NULL,            LM_MESSAGE_SUB_TYPE_NOT_SET      },

};

/// lm.message.new

/// Creates new message object.

/// Note: you can specify nil as to argument to send message to server.

/// A: string (to), message type, message sub type (optional)

/// R: lm message object

static int new_lm_message (lua_State *L)

{

	const char *to   = NULL;

	int         type = luaL_checkenum (L, 2, type_lm_message);

	LmMessage *message;

	if (lua_type (L, 1) != LUA_TNIL)

		to = luaL_checkstring (L, 1);

	if (lua_gettop (L) > 2)

		message = lm_message_new_with_sub_type (to, type,

						luaL_checkenum (L, 3, sub_type_lm_message));

	else

		message = lm_message_new (to, type);

	bless_lm_message (L, message);

	lm_message_unref (message);

	D ("Message %p created", message);

	return 1;

}

/// message table

/// Table describes xml structure of the message, the only exception is mtype key of root table.

/// mtype is a string of form "<message type>-<message sub type>", eg "iq-set".

/// Best way to learn how this table is organized, is just to look at next example:

/// [ lm.message.create { mtype = 'iq-result', to = 'foo@bar.xyz',

/// 	command = { xmlns = 'http://jabber.org/protocol/commands', node = 'http://jabber.org/protocol/rc#set-status', status = 'executing', sessionid = 'set-status:aaa3',

/// 		x = { xmlns = 'jabber:x:data', type = 'form',

/// 			title = { "Change Status" },

/// 			instructions = { "Choose the status and status message" },

/// 			field = {{ type = 'hidden', var = 'FORM_TYPE',

/// 				value = { "http://jabber.org/protocol/rc" },

/// 			},{ type = 'list-single', label = 'Status', var = 'status',

/// 				required = { },

/// 				value = { "online" },

/// 				option = {{ label = 'Chat',

/// 					value = { "chat" },

/// 				},{ label = 'Online',

/// 					value = { "online" },

/// 				},{ label = 'Away',

/// 					value = { "away" },

/// 				},{ label = 'Extended Away',

/// 					value = { "xa" },

/// 				},{ label = 'Do Not Disturb',

/// 					value = { "dnd" },

/// 				},{ label = 'Invisible',

/// 					value = { "invisible" },

/// 				},{ label = 'Offline',

/// 					value = { "offline" },

/// 				}},

/// 			},{ type = 'text-single', label = 'Priority', var = 'status-priority',

/// 				value = { "5" },

/// 			},{ type = 'text-multi', label = 'Message', var = 'status-message' }},

/// 		},

/// 	},

/// }

/// ]

static void fill_lm_node (lua_State *L, LmMessageNode *node, int index)

{

	int top = lua_gettop (L); // 0

	for (lua_pushnil (L); lua_next (L, index) != 0; lua_pop (L, lua_gettop (L) - top - 1)) // 2 value

		if (lua_type (L, top + 2) == LUA_TTABLE) {

			const char *name = lua_tostring (L, top + 1);

			lua_pushinteger (L, 1); // 3 1

			lua_gettable (L, top + 2); // 3 value[1]

			if (lua_type (L, top + 3) == LUA_TTABLE) {

				int i = 1;

				do {

					fill_lm_node (L, lm_message_node_add_child (node, name, NULL), top + 3);

					lua_pop (L, 1); // 2 value

					lua_pushinteger (L, ++i); // 3 i

					lua_gettable (L, top + 2); // 3 value[i]

				} while (lua_type (L, top + 3) == LUA_TTABLE);

			} else

				fill_lm_node (L, lm_message_node_add_child (node, name, NULL), top + 2);

		} else if (lua_type (L, top + 1) == LUA_TNUMBER && lua_tointeger (L, top + 1) == 1)

			lm_message_node_set_value (node, lua_tostring (L, top + 2));

		else

			lm_message_node_set_attribute (node, lua_tostring (L, top + 1), lua_tostring (L, top + 2));

}

/// lm.message.create

/// Creates new message object and fills it from message table.

/// Note, that table fields are not checked for their types, so, on wrong input results may be undefined.

/// A: message table

/// R: lm message object

static int create_lm_message (lua_State *L)

{

	const char *mtype;

	const char *st      = NULL;

	const char *to      = NULL;

	LmMessage  *message;

	luaL_checktype (L, 1, LUA_TTABLE);

	lua_getfield (L, 1, "mtype");

	mtype = lua_tostring (L, -1);

	if (mtype)

		st = strchr (mtype, '-');

	lua_getfield (L, 1, "to");

	if (lua_type (L, -1) == LUA_TSTRING)

		to = lua_tostring (L, -1);

	if (st) {

		LmMessageType mt;

		lua_pushlstring (L, mtype, st - mtype);

		mt = luaL_checkenum (L, -1, type_lm_message);

		lua_pop (L, 1);

		message = lm_message_new_with_sub_type (to, mt, string2enum (st + 1, sub_type_lm_message));

	} else

		message = lm_message_new (to, luaL_checkenum (L, -2, type_lm_message));

	lua_pop (L, 2);

	lua_pushnil (L);

	lua_setfield (L, 1, "mtype");

	lua_pushnil (L);

	lua_setfield (L, 1, "to");

	fill_lm_node (L, lm_message_get_node (message), 1);

	bless_lm_message (L, message);

	lm_message_unref (message);

	D ("Message %p created", message);

	return 1;

}

/// lm.message.bless

/// Blesses given pointer to lm message object.

/// A: lightuserdata (C lm message object)

/// R: lm message object

static int bless_lua_lm_message (lua_State *L)

{

	luaL_argcheck (L, lua_islightuserdata (L, 1), 1, "lm message lightuserdata expected");

	bless_lm_message (L, lua_touserdata (L, 1));

	return 1;

}

/// message:node

/// Returns root node object of message.

/// R: lm message node object

static int node_lm_message (lua_State *L)

{

	llm_message_t *object = luaL_checklm_message (L, 1);

	LmMessageNode *node = lm_message_get_node (object->message);

	bless_lm_node (L, node);

	// XXX lm_message_node_unref (node);

	return 1;

}

/// message:type

/// Returns two strings: message type and message sub type.

/// R: message type, message sub type

static int kind_lm_message (lua_State *L)

{

	llm_message_t *object = luaL_checklm_message (L, 1);

	luaL_pushenum (L, lm_message_get_type (object->message), type_lm_message);

	luaL_pushenum (L, lm_message_get_sub_type (object->message), sub_type_lm_message);

	return 2;

}

/// message:pointer

/// Returns pointer to underlying C loudmouth structure.

/// R: lightuserdata

static int pointer_lm_message (lua_State *L)

{

	llm_message_t *object = luaL_checklm_message (L, 1);

	lua_pushlightuserdata (L, object->message);

	return 1;

}

static int gc_lm_message (lua_State *L)

{

	llm_message_t *message = luaL_checklm_message (L, 1);

	D ("Message %p gc called", message);

	lm_message_unref (message->message);

	return 0;

}

static const luaL_Reg reg_f_lm_message[] = {

	{ "new",    new_lm_message       },

	{ "create", create_lm_message    },

	{ "bless",  bless_lua_lm_message },

	{ NULL,     NULL                 },

};

static const luaL_Reg reg_m_lm_message[] = {

	{ "node",       node_lm_message    },

	{ "type",       kind_lm_message    },

	// These methods are common for message and message node

	{ "name",       name_lm_node       },

	{ "next",       next_lm_node       },

	{ "prev",       prev_lm_node       },

	{ "parent",     parent_lm_node     },

	{ "value",      value_lm_node      },

	{ "child",      child_lm_node      },

	{ "children",   children_lm_node   },

	{ "find_child", find_child_lm_node },

	{ "attribute",  attribute_lm_node  },

	{ "raw",        raw_lm_node        },

	{ "xml",        xml_lm_node        },

	{ "path",       path_lm_node       },

	// End common methods

	{ "pointer",    pointer_lm_message },

	{ "__gc",       gc_lm_message      },

	{ NULL,         NULL               },

};

int luaopen_lm_message (lua_State *L)

{

	luaL_newmetatable (L, "loudmouth.message");

	lua_pushvalue (L, -1);

	lua_setfield (L, -2, "__index");

	luaL_setfuncs (L, reg_m_lm_message, 0);

	lua_pop (L, 1);

	lua_newtable (L); // XXX we can specify here exact amount of fields

	luaL_setfuncs (L, reg_f_lm_message, 0);

	return 1;

}