// Copyright (c) 2005, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//


///////////
// Headers
#include "export_framerate.h"
#include "vfr.h"
#include "ass_file.h"
#include "ass_dialogue.h"
#include "ass_override.h"


///////////////
// Constructor
AssTransformFramerateFilter::AssTransformFramerateFilter() {
	initialized = false;
}


////////
// Init
void AssTransformFramerateFilter::Init() {
	if (initialized) return;
	initialized = true;
	autoExporter = true;
	Register(_("Transform Framerate"),1000);
	description = _("Transform subtitles times, including those in override tags, from input to output. This is most useful to convert CFR to VFR for hardsubbing. You usually DO NOT want to check this filter for softsubbing.");
	Input = NULL;
	Output = NULL;
}


///////////
// Process
void AssTransformFramerateFilter::ProcessSubs(AssFile *subs, wxWindow *export_dialog) {
	// Transform frame rate
	if (Input->IsLoaded() && Output->IsLoaded()) {
		if (Output->GetFrameRateType() == VFR || Output->GetAverage() != Input->GetAverage()) {
			TransformFrameRate(subs);
		}
	}
}


//////////////
// Get dialog
wxWindow *AssTransformFramerateFilter::GetConfigDialogWindow(wxWindow *parent) {
	wxWindow *base = new wxPanel(parent, -1);

	// Input sizer
	wxSizer *InputSizer = new wxBoxSizer(wxHORIZONTAL);
	wxString initialInput;
	wxButton *FromVideo = new wxButton(base,Get_Input_From_Video,_("From Video"));
	if (VFR_Input.IsLoaded()) initialInput = wxString::Format(_T("%2.3f"),VFR_Input.GetAverage());
	else {
		initialInput = _T("23.976");
		FromVideo->Enable(false);
	}
	InputFramerate = new wxTextCtrl(base,-1,initialInput,wxDefaultPosition,wxSize(60,20));
	InputSizer->Add(InputFramerate,0,wxEXPAND | wxLEFT,5);
	InputSizer->Add(FromVideo,0,wxEXPAND | wxLEFT,5);
	InputSizer->AddStretchSpacer(1);

	// Output sizers
	wxSizer *OutputSizerTop = new wxBoxSizer(wxHORIZONTAL);
	wxSizer *OutputSizerBottom = new wxBoxSizer(wxHORIZONTAL);
	wxSizer *OutputSizer = new wxBoxSizer(wxVERTICAL);

	// Output top line
	RadioOutputVFR = new wxRadioButton(base,-1,_("Variable"),wxDefaultPosition,wxDefaultSize,wxRB_GROUP);
	OutputSizerTop->Add(RadioOutputVFR,0,wxEXPAND,0);

	// Output bottom line
	RadioOutputCFR = new wxRadioButton(base,-1,_("Constant: "));
	wxString initialOutput = initialInput;
	if (VFR_Output.GetFrameRateType() != VFR) {
		RadioOutputVFR->Enable(false);
		RadioOutputCFR->SetValue(true);
	}
	OutputFramerate = new wxTextCtrl(base,-1,initialOutput,wxDefaultPosition,wxSize(60,20));
	OutputSizerBottom->Add(RadioOutputCFR,0,wxEXPAND,0);
	OutputSizerBottom->Add(OutputFramerate,0,wxEXPAND | wxLEFT,5);
	OutputSizerBottom->AddStretchSpacer(1);

	// Output final
	OutputSizer->Add(OutputSizerTop,0,wxLEFT,5);
	OutputSizer->Add(OutputSizerBottom,0,wxLEFT,5);

	// Main window
	wxSizer *MainSizer = new wxFlexGridSizer(2,2,5,10);
	MainSizer->Add(new wxStaticText(base,-1,_("Input framerate: ")),0,wxEXPAND | wxALIGN_CENTER_VERTICAL,0);
	MainSizer->Add(InputSizer,0,wxEXPAND,0);
	MainSizer->Add(new wxStaticText(base,-1,_("Output: ")),0,wxALIGN_CENTER_VERTICAL,0);
	MainSizer->Add(OutputSizer,0,wxEXPAND,0);

	// Window
	base->SetSizerAndFit(MainSizer);
	return base;
}


/////////////////
// Load settings
void AssTransformFramerateFilter::LoadSettings(bool IsDefault) {
	if (IsDefault) {
		Input = &VFR_Input;
		Output = &VFR_Output;
	}
	else {
		double temp;
		InputFramerate->GetValue().ToDouble(&temp);
		t1.SetCFR(temp);
		Input = &t1;
		if (RadioOutputCFR->GetValue()) {
			OutputFramerate->GetValue().ToDouble(&temp);
			t2.SetCFR(temp);
			Output = &t2;
		}
		else Output = &VFR_Output;
	}
}


///////////////////////////////
// Transform framerate in tags
void AssTransformFramerateFilter::TransformTimeTags (wxString name,int n,AssOverrideParameter *curParam,void *curData) {
	// Setup
	LineData *lineData = (LineData*) curData;
	AssDialogue *curDiag = lineData->line;;
	bool start = true;
	bool karaoke = false;
	int mult = 1;
	int value;
	switch (curParam->classification) {
		case PARCLASS_RELATIVE_TIME_START:
			start = true;
			mult = 1;
			break;
		case PARCLASS_RELATIVE_TIME_END:
			start = false;
			mult = 1;
			break;
		case PARCLASS_KARAOKE:
			karaoke = true;
			start = true;
			mult = 10;
			break;
		default:
			return;
	}

	// Parameter value
	int parVal = curParam->AsInt() * mult;

	// Karaoke preprocess
	int curKarPos = 0;
	if (karaoke) {
		if (name == _T("\\k")) {
			curKarPos = lineData->k;
			lineData->k += parVal/10;
		}
		else if (name == _T("\\K") || name == _T("\\kf")) {
			curKarPos = lineData->kf;
			lineData->kf += parVal/10;
		}
		else if (name == _T("\\ko")) {
			curKarPos = lineData->ko;
			lineData->ko += parVal/10;
		}
		else throw wxString::Format(_T("Unknown karaoke tag! '%s'"), name.c_str());
		curKarPos *= 10;
		parVal += curKarPos;
	}

	// Start time
	if (start) {
		int newStart = instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(curDiag->Start.GetMS()));
		int absTime = curDiag->Start.GetMS() + parVal;
		value = instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(absTime)) - newStart;
	}

	// End time
	else {
		int newEnd = instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(curDiag->End.GetMS()));
		int absTime = curDiag->End.GetMS() - parVal;
		value = newEnd - instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(absTime));
	}

	// Karaoke postprocess
	if (karaoke) {
		int post = instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(curDiag->Start.GetMS() + curKarPos));
		int start = instance.Input->GetTimeAtFrame(instance.Output->GetFrameAtTime(curDiag->Start.GetMS()));
		curKarPos = post-start;
		value -= curKarPos;
	}

	curParam->SetInt(value/mult);
}


///////////////////////
// Transform framerate
void AssTransformFramerateFilter::TransformFrameRate(AssFile *subs) {
	int n=0;

	// Run through
	using std::list;
	AssEntry *curEntry;
	AssDialogue *curDialogue;
	for (entryIter cur=subs->Line.begin();cur!=subs->Line.end();cur++) {
		curEntry = *cur;
		curEntry->StartMS = Input->GetTimeAtFrame(Output->GetFrameAtTime(curEntry->StartMS,true),true);
		curDialogue = AssEntry::GetAsDialogue(curEntry);

		// Update dialogue entries
		if (curDialogue) {
			// Line data
			LineData data;
			data.line = curDialogue;
			data.k = 0;
			data.kf = 0;
			data.ko = 0;

			// Process stuff
			curDialogue->ParseASSTags();
			curDialogue->ProcessParameters(TransformTimeTags,&data);
			curDialogue->Start.SetMS(Input->GetTimeAtFrame(Output->GetFrameAtTime(curDialogue->Start.GetMS(),true),true));
			curDialogue->End.SetMS(Input->GetTimeAtFrame(Output->GetFrameAtTime(curDialogue->End.GetMS(),false),false));
			curDialogue->UpdateText();
			curDialogue->UpdateData();
			curDialogue->ClearBlocks();
			n++;
		}
	}
}


///////////////////
// Global instance
AssTransformFramerateFilter AssTransformFramerateFilter::instance;