/*
    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>

    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 2 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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "subtitle.h"

using std::ostream;
using std::list;
using namespace sub;

Subtitle::Subtitle (RawSubtitle s)
	: from (s.from)
	, to (s.to)
	, fade_up (s.fade_up)
	, fade_down (s.fade_down)
{
	lines.push_back (Line (s));
}

bool
Subtitle::same_metadata (RawSubtitle s) const
{
	if (from != s.from || to != s.to) {
		return false;
	}

	if (fade_up && s.fade_up && fade_up.get() != s.fade_up.get()) {
		return false;
	}

	if ((fade_up && !s.fade_up) || (!fade_up && s.fade_up)) {
		return false;
	}

	if (fade_down && s.fade_down && fade_down.get() != s.fade_down.get()) {
		return false;
	}

	if ((fade_down && !s.fade_down) || (!fade_down && s.fade_down)) {
		return false;
	}
	
	return true;
}

bool
sub::operator== (Subtitle const & a, Subtitle const & b)
{
	return (
		a.from == b.from &&
		a.to == b.to &&
		a.fade_up == b.fade_up &&
		a.fade_down == b.fade_down &&
		a.lines == b.lines
		);
}

Line::Line (RawSubtitle s)
	: vertical_position (s.vertical_position)
{
	blocks.push_back (Block (s));
}

bool
Line::same_metadata (RawSubtitle s) const
{
	return vertical_position == s.vertical_position;
}

bool
sub::operator== (Line const & a, Line const & b)
{
	return (
		a.vertical_position == b.vertical_position &&
		a.blocks == b.blocks
		);
}

Block::Block (RawSubtitle s)
	: text (s.text)
	, font (s.font)
	, font_size (s.font_size)
	, effect (s.effect)
	, effect_colour (s.effect_colour)
	, colour (s.colour)
	, bold (s.bold)
	, italic (s.italic)
	, underline (s.underline)
{
	
}

bool
sub::operator== (Block const & a, Block const & b)
{
	return (
		a.text == b.text &&
		a.font == b.font &&
		a.font_size == b.font_size &&
		a.effect == b.effect &&
		a.effect_colour == b.effect_colour &&
		a.colour == b.colour &&
		a.bold == b.bold &&
		a.italic == b.italic &&
		a.underline == b.underline
		);
}

/* The output of this method should not be relied upon
   as part of the API.
*/
ostream &
sub::operator<< (ostream& s, Subtitle const & sub)
{
	s << "Subtitle at " << sub.from << " -> " << sub.to << "\n";
	for (list<sub::Line>::const_iterator i = sub.lines.begin(); i != sub.lines.end(); ++i) {
		
		s << "\t";
		
		/* XXX: should be in VerticalPosition operator<< */
		if (i->vertical_position.proportional) {
			s << i->vertical_position.proportional.get() << " of screen";
		} else if (i->vertical_position.line) {
			s << i->vertical_position.line.get() << " lines of " << i->vertical_position.lines.get();
		}
		if (i->vertical_position.reference) {
			s << " from ";
			switch (i->vertical_position.reference.get()) {
			case TOP_OF_SCREEN:
				s << "top";
				break;
			case CENTRE_OF_SCREEN:
				s << "centre";
				break;
			case BOTTOM_OF_SCREEN:
				s << "bottom";
				break;
			case TOP_OF_SUBTITLE:
				s << "top of subtitle";
				break;
			}
		}
		
		s << "\t";
		bool italic = false;
		bool underline = false;
		for (list<sub::Block>::const_iterator j = i->blocks.begin(); j != i->blocks.end(); ++j) {
			if (j->italic && !italic) {
				s << "<i>";
			} else if (italic && !j->italic) {
				s << "</i>";
			}
			if (j->underline && !underline) {
				s << "<u>";
			} else if (underline && !j->underline) {
				s << "</u>";
			}
			
			italic = j->italic;
			underline = j->underline;
			
			s << j->text;
		}
		
		if (italic) {
			s << "</i>";
		}
		if (underline) {
			s << "</u>";
		}
		s << "\n";
	}

	return s;
}