// Copyright (c) 2007, Rodrigo Braz Monteiro
// All rights reserved.
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//     this list of conditions and the following disclaimer.
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//     this list of conditions and the following disclaimer in the documentation
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// Aegisub Project http://www.aegisub.org/
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// $Id$

/// @file visual_tool_rotatexy.cpp
/// @brief 3D rotation in X/Y axes visual typesetting tool
/// @ingroup visual_ts

#include "config.h"

#ifndef AGI_PRE
#include <math.h>
#endif

#include "ass_dialogue.h"
#include "ass_file.h"
#include "subs_edit_box.h"
#include "subs_grid.h"
#include "utils.h"
#include "video_context.h"
#include "video_display.h"
#include "visual_tool_rotatexy.h"

/// @brief Constructor 
/// @param _parent 
VisualToolRotateXY::VisualToolRotateXY(VideoDisplay *parent, VideoState const& video, wxToolBar *)
: VisualTool<VisualDraggableFeature>(parent, video)
{
	DoRefresh();
}

/// @brief Draw 
void VisualToolRotateXY::Draw() {
	// Get line to draw
	AssDialogue *line = GetActiveDialogueLine();
	if (!line) return;

	// Pivot coordinates
	int dx=0,dy=0;
	if (dragging) GetLinePosition(line,dx,dy);
	else GetLinePosition(line,dx,dy,orgx,orgy);
	dx = orgx;
	dy = orgy;

	// Rotation
	float rx,ry;
	GetLineRotation(line,rx,ry,rz);
	if (line == curDiag) {
		rx = curAngleX;
		ry = curAngleY;
	}

	// Set colours
	SetLineColour(colour[0]);
	SetFillColour(colour[1],0.3f);

	// Draw pivot
	DrawAllFeatures();
		
	// Transform grid
	glMatrixMode(GL_MODELVIEW);
	glPushMatrix();
	glLoadIdentity();
	glTranslatef(dx,dy,0.0f);
	float matrix[16] = { 2500, 0, 0, 0, 0, 2500, 0, 0, 0, 0, 1, 1, 0, 0, 2500, 2500 };
	glMultMatrixf(matrix);
	glScalef(1.0f,1.0f,8.0f);
	if (ry != 0.0f) glRotatef(ry,0.0f,-1.0f,0.0f);
	if (rx != 0.0f) glRotatef(rx,-1.0f,0.0f,0.0f);
	if (rz != 0.0f) glRotatef(rz,0.0f,0.0f,-1.0f);

	// Draw grid
	glShadeModel(GL_SMOOTH);
	SetLineColour(colour[0],0.5f,2);
	SetModeLine();
	float r = colour[0].Red()/255.0f;
	float g = colour[0].Green()/255.0f;
	float b = colour[0].Blue()/255.0f;
	glBegin(GL_LINES);
	for (int i=0;i<11;i++) {
		float a = 1.0f - abs(i-5)*0.18f;
		int pos = 20*(i-5);
		glColor4f(r,g,b,0.0f);
		glVertex2i(pos,120);
		glColor4f(r,g,b,a);
		glVertex2i(pos,0);
		glVertex2i(pos,0);
		glColor4f(r,g,b,0.0f);
		glVertex2i(pos,-120);
		glVertex2i(120,pos);
		glColor4f(r,g,b,a);
		glVertex2i(0,pos);
		glVertex2i(0,pos);
		glColor4f(r,g,b,0.0f);
		glVertex2i(-120,pos);
	}
	glEnd();

	// Draw vectors
	SetLineColour(colour[3],1.0f,2);
	SetModeLine();
	glBegin(GL_LINES);
		glVertex3f(0.0f,0.0f,0.0f);
		glVertex3f(50.0f,0.0f,0.0f);
		glVertex3f(0.0f,0.0f,0.0f);
		glVertex3f(0.0f,50.0f,0.0f);
		glVertex3f(0.0f,0.0f,0.0f);
		glVertex3f(0.0f,0.0f,50.0f);
	glEnd();

	// Draw arrow tops
	glBegin(GL_TRIANGLE_FAN);
		glVertex3f(60.0f,0.0f,0.0f);
		glVertex3f(50.0f,-3.0f,-3.0f);
		glVertex3f(50.0f,3.0f,-3.0f);
		glVertex3f(50.0f,3.0f,3.0f);
		glVertex3f(50.0f,-3.0f,3.0f);
		glVertex3f(50.0f,-3.0f,-3.0f);
	glEnd();
	glBegin(GL_TRIANGLE_FAN);
		glVertex3f(0.0f,60.0f,0.0f);
		glVertex3f(-3.0f,50.0f,-3.0f);
		glVertex3f(3.0f,50.0f,-3.0f);
		glVertex3f(3.0f,50.0f,3.0f);
		glVertex3f(-3.0f,50.0f,3.0f);
		glVertex3f(-3.0f,50.0f,-3.0f);
	glEnd();
	glBegin(GL_TRIANGLE_FAN);
		glVertex3f(0.0f,0.0f,60.0f);
		glVertex3f(-3.0f,-3.0f,50.0f);
		glVertex3f(3.0f,-3.0f,50.0f);
		glVertex3f(3.0f,3.0f,50.0f);
		glVertex3f(-3.0f,3.0f,50.0f);
		glVertex3f(-3.0f,-3.0f,50.0f);
	glEnd();

	// Restore gl's state
	glPopMatrix();
	glShadeModel(GL_FLAT);
}

/// @brief Start holding 
bool VisualToolRotateXY::InitializeHold() {
	GetLinePosition(curDiag,odx,ody,orgx,orgy);
	GetLineRotation(curDiag,origAngleX,origAngleY,rz);
	startAngleX = (orgy-video.y)*2.f;
	startAngleY = (video.x-orgx)*2.f;
	curAngleX = origAngleX;
	curAngleY = origAngleY;
	curDiag->StripTag(L"\\frx");
	curDiag->StripTag(L"\\fry");

	return true;
}

/// @brief Update hold 
void VisualToolRotateXY::UpdateHold() {
	float screenAngleX = (orgy-video.y)*2.f;
	float screenAngleY = (video.x-orgx)*2.f;

	// Deltas
	float deltaX = screenAngleX - startAngleX;
	float deltaY = screenAngleY - startAngleY;
	if (shiftDown) {
		if (fabs(deltaX) >= fabs(deltaY)) deltaY = 0.f;
		else deltaX = 0.f;
	}

	// Calculate
	curAngleX = fmodf(deltaX + origAngleX + 360.f, 360.f);
	curAngleY = fmodf(deltaY + origAngleY + 360.f, 360.f);

	// Oh Snap
	if (ctrlDown) {
		curAngleX = floorf(curAngleX/30.f+.5f)*30.f;
		curAngleY = floorf(curAngleY/30.f+.5f)*30.f;
		if (curAngleX > 359.f) curAngleX = 0.f;
		if (curAngleY > 359.f) curAngleY = 0.f;
	}
}

/// @brief Commit hold 
void VisualToolRotateXY::CommitHold() {
	SubtitlesGrid *grid = VideoContext::Get()->grid;
	wxArrayInt sel = grid->GetSelection();
	for (wxArrayInt::const_iterator cur = sel.begin(); cur != sel.end(); ++cur) {
		AssDialogue* line = grid->GetDialogue(*cur);
		assert(line);
		SetOverride(line, L"\\frx",wxString::Format(L"(%0.3g)",curAngleX));
		SetOverride(line, L"\\fry",wxString::Format(L"(%0.3g)",curAngleY));
	}
}

/// @brief Get \\org pivot 
void VisualToolRotateXY::PopulateFeatureList() {
	// Get line
	curDiag = GetActiveDialogueLine();
	GetLinePosition(curDiag,odx,ody,orgx,orgy);

	// Set features
	features.resize(1);
	VisualDraggableFeature &feat = features.back();
	feat.x = orgx;
	feat.y = orgy;
	feat.line = curDiag;
	feat.type = DRAG_BIG_TRIANGLE;
}

/// @brief Update dragging of \\org 
/// @param feature 
void VisualToolRotateXY::UpdateDrag(VisualDraggableFeature* feature) {
	orgx = feature->x;
	orgy = feature->y;
}

/// @brief Commit dragging of \\org 
/// @param feature 
void VisualToolRotateXY::CommitDrag(VisualDraggableFeature* feature) {
	int x = feature->x;
	int y = feature->y;
	parent->ToScriptCoords(&x, &y);
	SetOverride(feature->line, L"\\org",wxString::Format(L"(%i,%i)",x,y));
}

/// @brief Refresh 
void VisualToolRotateXY::DoRefresh() {
	AssDialogue *line = GetActiveDialogueLine();
	GetLinePosition(line,odx,ody,orgx,orgy);
	GetLineRotation(line,curAngleX,curAngleY,rz);
}