/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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 3 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 "ags/shared/ac/view.h"
#include "ags/shared/util/stream.h"

namespace AGS3 {

using AGS::Shared::Stream;

ViewFrame::ViewFrame()
	: pic(0)
	, xoffs(0)
	, yoffs(0)
	, speed(0)
	, flags(0)
	, sound(-1)
	, audioclip(-1) {
	reserved_for_future[0] = 0;
	reserved_for_future[1] = 0;
}

void ViewFrame::ReadFromFile(Stream *in) {
	pic = in->ReadInt32();
	xoffs = in->ReadInt16();
	yoffs = in->ReadInt16();
	speed = in->ReadInt16();
	in->ReadInt16(); // alignment padding to int32
	flags = in->ReadInt32();
	sound = in->ReadInt32();
	in->ReadInt32(); // reserved 1
	in->ReadInt32(); // reserved 1
}

void ViewFrame::WriteToFile(Stream *out) {
	out->WriteInt32(pic);
	out->WriteInt16(xoffs);
	out->WriteInt16(yoffs);
	out->WriteInt16(speed);
	out->WriteInt16(0); // alignment padding to int32
	out->WriteInt32(flags);
	out->WriteInt32(sound);
	out->WriteInt32(0);
	out->WriteInt32(0);
}

ViewLoopNew::ViewLoopNew()
	: numFrames(0)
	, flags(0) {
}

bool ViewLoopNew::RunNextLoop() {
	return (flags & LOOPFLAG_RUNNEXTLOOP);
}

void ViewLoopNew::Initialize(int frameCount) {
	numFrames = frameCount;
	flags = 0;
	// an extra frame is allocated to prevent crashes with empty loops
	frames.resize(numFrames > 0 ? numFrames : 1);
}

void ViewLoopNew::Dispose() {
	frames.clear();
	numFrames = 0;
}

void ViewLoopNew::WriteToFile_v321(Stream *out) {
	out->WriteInt16(static_cast<uint16_t>(numFrames));
	out->WriteInt32(flags);
	WriteFrames(out);
}

void ViewLoopNew::WriteFrames(Stream *out) {
	for (int i = 0; i < numFrames; ++i) {
		frames[i].WriteToFile(out);
	}
}

void ViewLoopNew::ReadFromFile_v321(Stream *in) {
	Initialize(static_cast<uint16_t>(in->ReadInt16()));
	flags = in->ReadInt32();
	ReadFrames(in);
}

void ViewLoopNew::ReadFrames(Stream *in) {
	for (int i = 0; i < numFrames; ++i) {
		frames[i].ReadFromFile(in);
	}
}

ViewStruct::ViewStruct()
	: numLoops(0) {
}

void ViewStruct::Initialize(int loopCount) {
	numLoops = loopCount;
	loops.resize(numLoops);
}

void ViewStruct::Dispose() {
	loops.clear();
	numLoops = 0;
}

void ViewStruct::WriteToFile(Stream *out) {
	out->WriteInt16(static_cast<uint16_t>(numLoops));
	for (int i = 0; i < numLoops; i++) {
		loops[i].WriteToFile_v321(out);
	}
}

void ViewStruct::ReadFromFile(Stream *in) {
	Initialize(static_cast<uint16_t>(in->ReadInt16()));

	for (int i = 0; i < numLoops; i++) {
		loops[i].ReadFromFile_v321(in);
	}
}

ViewStruct272::ViewStruct272()
	: numloops(0) {
	memset(numframes, 0, sizeof(numframes));
	memset(loopflags, 0, sizeof(loopflags));
}

void ViewStruct272::ReadFromFile(Stream *in) {
	numloops = in->ReadInt16();
	for (int i = 0; i < 16; ++i) {
		numframes[i] = in->ReadInt16();
	}
	in->ReadInt16(); // alignment padding to int32
	in->ReadArrayOfInt32(loopflags, 16);
	for (int j = 0; j < 16; ++j) {
		for (int i = 0; i < 20; ++i) {
			frames[j][i].ReadFromFile(in);
		}
	}
}

void Convert272ViewsToNew(const std::vector<ViewStruct272> &oldv, std::vector<ViewStruct> &newv) {
	for (size_t a = 0; a < oldv.size(); a++) {
		newv[a].Initialize(oldv[a].numloops);

		for (int b = 0; b < oldv[a].numloops; b++) {
			newv[a].loops[b].Initialize(oldv[a].numframes[b]);

			if ((oldv[a].numframes[b] > 0) &&
			        (oldv[a].frames[b][oldv[a].numframes[b] - 1].pic == -1)) {
				newv[a].loops[b].flags = LOOPFLAG_RUNNEXTLOOP;
				newv[a].loops[b].numFrames--;
			} else
				newv[a].loops[b].flags = 0;

			for (int c = 0; c < newv[a].loops[b].numFrames; c++)
				newv[a].loops[b].frames[c] = oldv[a].frames[b][c];
		}
	}
}

} // namespace AGS3