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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "debug.h"

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#include "player_base.h"

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#include "player_func.h"

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#include "command_func.h"

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#include "news_func.h"

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#include "saveload.h"

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#include "variables.h"

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#include "train.h"

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#include "aircraft.h"

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#include "newgrf_cargo.h"

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#include "group.h"

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#include "strings_func.h"

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#include "gfx_func.h"

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#include "functions.h"

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#include "window_func.h"

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#include "date_func.h"

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#include "autoreplace_base.h"

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#include "autoreplace_gui.h"

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#include "string_func.h"

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#include "settings_type.h"

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#include "oldpool_func.h"

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#include "table/strings.h"

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#include "table/engines.h"

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enum {

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	YEAR_ENGINE_AGING_STOPS = 2050,

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};

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   183

void SetupEngines()

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{

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   192

}

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   194

   195

void ShowEnginePreviewWindow(EngineID engine);

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void DeleteCustomEngineNames()

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{

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	Engine *e;

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	FOR_ALL_ENGINES(e) {

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		free(e->name);

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		e->name = NULL;

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	}

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	_vehicle_design_names &= ~1;

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}

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void LoadCustomEngineNames()

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{

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	/* XXX: not done */

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	DEBUG(misc, 1, "LoadCustomEngineNames: not done");

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}

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static void CalcEngineReliability(Engine *e)

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{

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	uint age = e->age;

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   218

	/* Check for early retirement */

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	if (e->player_avail != 0 && !_patches.never_expire_vehicles) {

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		uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);

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		if (retire_early != 0 && age >= retire_early_max_age) {

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			/* Early retirement is enabled and we're past the date... */

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			e->player_avail = 0;

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			AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);

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		}

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	}

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	if (age < e->duration_phase_1) {

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		uint start = e->reliability_start;

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		e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;

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	} else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _patches.never_expire_vehicles) {

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		/* We are at the peak of this engines life. It will have max reliability.

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		 * This is also true if the engines never expire. They will not go bad over time */

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		e->reliability = e->reliability_max;

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	} else if ((age -= e->duration_phase_2) < e->duration_phase_3) {

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		uint max = e->reliability_max;

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		e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;

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	} else {

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		/* time's up for this engine.

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		 * We will now completely retire this design */

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		e->player_avail = 0;

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		e->reliability = e->reliability_final;

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		/* Kick this engine out of the lists */

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		AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);

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	}

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	InvalidateWindowClasses(WC_BUILD_VEHICLE); // Update to show the new reliability

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	InvalidateWindowClasses(WC_REPLACE_VEHICLE);

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}

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void StartupEngines()

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{

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	Engine *e;

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	/* Aging of vehicles stops, so account for that when starting late */

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	const Date aging_date = min(_date, ConvertYMDToDate(YEAR_ENGINE_AGING_STOPS, 0, 1));

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   259

		uint32 r;

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   261

		e->age = 0;

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		e->flags = 0;

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		e->player_avail = 0;

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		/* The magic value of 729 days below comes from the NewGRF spec. If the

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		 * base intro date is before 1922 then the random number of days is not

   267

		 * added. */

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		r = Random();

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		e->intro_date = ei->base_intro <= ConvertYMDToDate(1922, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;

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		if (e->intro_date <= _date) {

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			e->age = (aging_date - e->intro_date) >> 5;

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			e->player_avail = (byte)-1;

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			e->flags |= ENGINE_AVAILABLE;

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		}

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		e->reliability_start = GB(r, 16, 14) + 0x7AE0;

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		r = Random();

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		e->reliability_max   = GB(r,  0, 14) + 0xBFFF;

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		e->reliability_final = GB(r, 16, 14) + 0x3FFF;

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		r = Random();

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		e->duration_phase_1 = GB(r, 0, 5) + 7;

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		e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;

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		e->duration_phase_3 = GB(r, 9, 7) + 120;

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		e->reliability_spd_dec = (ei->unk2&0x7F) << 2;

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		/* my invented flag for something that is a wagon */

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		if (ei->unk2 & 0x80) {

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			e->age = 0xFFFF;

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		} else {

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			CalcEngineReliability(e);

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		}

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		e->lifelength = ei->lifelength + _patches.extend_vehicle_life;

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		/* prevent certain engines from ever appearing. */

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		if (!HasBit(ei->climates, _opt.landscape)) {

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			e->flags |= ENGINE_AVAILABLE;

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			e->player_avail = 0;

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		}

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	}

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}

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static void AcceptEnginePreview(EngineID eid, PlayerID player)

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{

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	Engine *e = GetEngine(eid);

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	Player *p = GetPlayer(player);

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	SetBit(e->player_avail, player);

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	if (e->type == VEH_TRAIN) {

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		const RailVehicleInfo *rvi = RailVehInfo(eid);

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		assert(rvi->railtype < RAILTYPE_END);

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		SetBit(p->avail_railtypes, rvi->railtype);

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	} else if (e->type == VEH_ROAD) {

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		SetBit(p->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);

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	}

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	e->preview_player_rank = 0xFF;

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	if (player == _local_player) {

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		AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);

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	}

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}

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static PlayerID GetBestPlayer(uint8 pp)

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{

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	const Player *p;

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	int32 best_hist;

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	PlayerID best_player;

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	uint mask = 0;

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	do {

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		best_hist = -1;

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		best_player = PLAYER_SPECTATOR;

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		FOR_ALL_PLAYERS(p) {

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			if (p->is_active && p->block_preview == 0 && !HasBit(mask, p->index) &&

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					p->old_economy[0].performance_history > best_hist) {

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				best_hist = p->old_economy[0].performance_history;

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				best_player = p->index;

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			}

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		}

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		if (best_player == PLAYER_SPECTATOR) return PLAYER_SPECTATOR;

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		SetBit(mask, best_player);

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	} while (--pp != 0);

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	return best_player;

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}

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void EnginesDailyLoop()

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{

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	if (_cur_year >= YEAR_ENGINE_AGING_STOPS) return;

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		if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {

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			if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {

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				if (e->preview_player_rank != 0xFF && !--e->preview_wait) {

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					e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;

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					DeleteWindowById(WC_ENGINE_PREVIEW, i);

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					e->preview_player_rank++;

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				}

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			} else if (e->preview_player_rank != 0xFF) {

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				PlayerID best_player = GetBestPlayer(e->preview_player_rank);

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   369

				if (best_player == PLAYER_SPECTATOR) {

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					e->preview_player_rank = 0xFF;

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					continue;

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				}

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				if (!IsHumanPlayer(best_player)) {

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					/* XXX - TTDBUG: TTD has a bug here ???? */

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					AcceptEnginePreview(i, best_player);

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				} else {

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					e->flags |= ENGINE_OFFER_WINDOW_OPEN;

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					e->preview_wait = 20;

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					if (IsInteractivePlayer(best_player)) ShowEnginePreviewWindow(i);

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				}

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			}

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		}

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	}

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}

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/** Accept an engine prototype. XXX - it is possible that the top-player

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 * changes while you are waiting to accept the offer? Then it becomes invalid

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 * @param tile unused

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 * @param flags operation to perfom

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 * @param p1 engine-prototype offered

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 * @param p2 unused

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 */

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

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{

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	Engine *e;

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	if (!IsEngineIndex(p1)) return CMD_ERROR;

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	e = GetEngine(p1);

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	if (GetBestPlayer(e->preview_player_rank) != _current_player) return CMD_ERROR;

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	if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_player);

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	return CommandCost();

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}

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/* Determine if an engine type is a wagon (and not a loco) */

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static bool IsWagon(EngineID index)

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{

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}

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static void NewVehicleAvailable(Engine *e)

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{

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	Vehicle *v;

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	Player *p;

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	/* In case the player didn't build the vehicle during the intro period,

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	 * prevent that player from getting future intro periods for a while. */

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	if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {

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		FOR_ALL_PLAYERS(p) {

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			uint block_preview = p->block_preview;

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			if (!HasBit(e->player_avail, p->index)) continue;

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			/* We assume the user did NOT build it.. prove me wrong ;) */

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			p->block_preview = 20;

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			FOR_ALL_VEHICLES(v) {

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				if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||

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						(v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) {

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					if (v->owner == p->index && v->engine_type == index) {

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						/* The user did prove me wrong, so restore old value */

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						p->block_preview = block_preview;

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						break;

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					}

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				}

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			}

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		}

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	}

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	e->flags = (e->flags & ~ENGINE_EXCLUSIVE_PREVIEW) | ENGINE_AVAILABLE;

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	AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);

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	/* Now available for all players */

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	e->player_avail = (byte)-1;

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   452

	/* Do not introduce new rail wagons */

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	if (IsWagon(index)) return;

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	if (e->type == VEH_TRAIN) {

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		/* maybe make another rail type available */

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		assert(railtype < RAILTYPE_END);

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		FOR_ALL_PLAYERS(p) {

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			if (p->is_active) SetBit(p->avail_railtypes, railtype);

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		}

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	} else if (e->type == VEH_ROAD) {

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		/* maybe make another road type available */

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		FOR_ALL_PLAYERS(p) {

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		}

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	}

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}

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void EnginesMonthlyLoop()

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{

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	if (_cur_year < YEAR_ENGINE_AGING_STOPS) {

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		Engine *e;

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		FOR_ALL_ENGINES(e) {

   479

			/* Age the vehicle */

   480

			if (e->flags & ENGINE_AVAILABLE && e->age != 0xFFFF) {

   481

				e->age++;

   482

				CalcEngineReliability(e);

   483

			}

   484

   485

			if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + 365)) {

   486

				/* Introduce it to all players */

   487

				NewVehicleAvailable(e);

   488

			} else if (!(e->flags & (ENGINE_AVAILABLE|ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {

   489

				/* Introduction date has passed.. show introducing dialog to one player. */

   490

				e->flags |= ENGINE_EXCLUSIVE_PREVIEW;