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/* $Id$ */

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/** @file timetable_cmd.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "functions.h"

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#include "variables.h"

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#include "table/strings.h"

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#include "command.h"

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#include "vehicle.h"

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/**

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 * Add or remove waiting times from an order.

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 * @param tile Not used.

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 * @param flags Operation to perform.

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 * @param p1 Various bitstuffed elements

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 * - p1 = (bit  0-15) - Vehicle with the orders to change.

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 * - p1 = (bit 16-23) - Order index to modify.

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 * - p1 = (bit    24) - Whether to change the waiting time or the travelling

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 *                      time.

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 * @param p2 The amount of time to wait.

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 */

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CommandCost CmdChangeTimetable(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	if (!_patches.timetabling) return CMD_ERROR;

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	VehicleID veh = GB(p1, 0, 16);

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	if (!IsValidVehicleID(veh)) return CMD_ERROR;

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	Vehicle *v = GetVehicle(veh);

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	if (!CheckOwnership(v->owner)) return CMD_ERROR;

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	VehicleOrderID order_number = GB(p1, 16, 8);

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	Order *order = GetVehicleOrder(v, order_number);

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	if (order == NULL) return CMD_ERROR;

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	bool is_journey = HASBIT(p1, 24);

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	if (!is_journey) {

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		if (order->type != OT_GOTO_STATION) return_cmd_error(STR_TIMETABLE_ONLY_WAIT_AT_STATIONS);

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		if (_patches.new_nonstop && (order->flags & OF_NON_STOP)) return_cmd_error(STR_TIMETABLE_NOT_STOPPING_HERE);

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	}

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	if (flags & DC_EXEC) {

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		if (is_journey) {

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			order->travel_time = p2;

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		} else {

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			order->wait_time = p2;

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		}

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		if (v->cur_order_index == order_number && HASBIT(v->current_order.flags, OFB_PART_OF_ORDERS)) {

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			if (is_journey) {

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				v->current_order.travel_time = p2;

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			} else {

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				v->current_order.wait_time = p2;

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			}

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		}

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		InvalidateWindow(WC_VEHICLE_TIMETABLE, v->index);

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	}

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	return CommandCost();

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}

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/**

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 * Clear the lateness counter to make the vehicle on time.

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 * @param tile Not used.

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 * @param flags Operation to perform.

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 * @param p1 Various bitstuffed elements

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 * - p1 = (bit  0-15) - Vehicle with the orders to change.

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 */

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CommandCost CmdSetVehicleOnTime(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	if (!_patches.timetabling) return CMD_ERROR;

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	VehicleID veh = GB(p1, 0, 16);

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	if (!IsValidVehicleID(veh)) return CMD_ERROR;

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	Vehicle *v = GetVehicle(veh);

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	if (!CheckOwnership(v->owner)) return CMD_ERROR;

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	if (flags & DC_EXEC) {

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		v->lateness_counter = 0;

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	}

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	return CommandCost();

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}

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void UpdateVehicleTimetable(Vehicle *v, bool travelling)

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{

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	uint timetabled = travelling ? v->current_order.travel_time : v->current_order.wait_time;

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	uint time_taken = v->current_order_time;

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	v->current_order_time = 0;

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	if (!_patches.timetabling || timetabled == 0) return;

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	v->lateness_counter -= (timetabled - time_taken);

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	InvalidateWindow(WC_VEHICLE_TIMETABLE, v->index);

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}