/* Manual.cpp
 *
 * Copyright (C) 1996-2020 Paul Boersma
 *
 * This code 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 code 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 work. If not, see <http://www.gnu.org/licenses/>.
 */

#include "Manual.h"
#include "Printer.h"
#include "machine.h"
#include "site.h"
#include <time.h>
#include "EditorM.h"
#include "praat_script.h"
#include "praatP.h"

Thing_implement (Manual, HyperPage, 0);

/* Remaining BUGS: HTML writer does not recognize "\s{". */

#define SEARCH_PAGE  0

static const conststring32 month [] =
	{ U"", U"January", U"February", U"March", U"April", U"May", U"June",
	  U"July", U"August", U"September", U"October", U"November", U"December" };

static void menu_cb_writeOneToHtmlFile (Manual me, EDITOR_ARGS_FORM) {
	EDITOR_FORM_SAVE (U"Save as HTML file", nullptr)
		ManPages manPages = (ManPages) my data;
		autoMelderString buffer;
		MelderString_copy (& buffer, manPages -> pages.at [my visiblePageNumber] -> title.get());
		char32 *p = buffer.string;
		while (*p) {
			if (! isalnum ((int) *p) && *p != U'_')
				*p = U'_';
			p ++;
		}
		MelderString_append (& buffer, U".html");
		Melder_sprint (defaultName,300, buffer.string);
	EDITOR_DO_SAVE
		ManPages_writeOneToHtmlFile ((ManPages) my data, my visiblePageNumber, file);
	EDITOR_END
}

static void menu_cb_writeAllToHtmlDir (Manual me, EDITOR_ARGS_FORM) {
	EDITOR_FORM (U"Save all pages as HTML files", nullptr)
		TEXTFIELD (directory, U"Directory:", U"")
	EDITOR_OK
		SET_STRING (directory, Melder_dirToPath (& my rootDirectory))
	EDITOR_DO
		ManPages_writeAllToHtmlDir ((ManPages) my data, directory);
	EDITOR_END
}

static void menu_cb_searchForPageList (Manual me, EDITOR_ARGS_FORM) {
	EDITOR_FORM (U"Search for page", nullptr)
		static ManPages manPages;
		static constSTRVEC pages;
		manPages = (ManPages) my data;
		pages = ManPages_getTitles (manPages);
		LIST (page, U"Page", pages, 1)
	EDITOR_OK
	EDITOR_DO
		HyperPage_goToPage_number (me, page);
	EDITOR_END
}

void structManual :: v_draw () {
	ManPages manPages = (ManPages) our data;
	#if motif
	Graphics_clearWs (our graphics.get());
	#endif
	if (our visiblePageNumber == SEARCH_PAGE) {
		HyperPage_pageTitle (this, U"Best matches");
		HyperPage_intro (this, U"The best matches to your query seem to be:");
		for (int i = 1; i <= our numberOfMatches; i ++) {
			char32 link [300];
			ManPage page = manPages -> pages.at [matches [i]];
			Melder_sprint (link,300, U"• @@", page -> title.get());
			HyperPage_listItem (this, link);
		}
		return;
	}
	ManPage page = manPages -> pages.at [our visiblePageNumber];
	//if (! our paragraphs____)
	//	return;
	HyperPage_pageTitle (this, page -> title.get());
	for (integer ipar = 1; ipar <= page -> paragraphs.size; ipar ++) {
		ManPage_Paragraph paragraph = & page -> paragraphs [ipar];
		switch (paragraph -> type) {
			case  kManPage_type::INTRO: HyperPage_intro (this, paragraph -> text); break;
			case  kManPage_type::ENTRY: HyperPage_entry (this, paragraph -> text); break;
			case  kManPage_type::NORMAL: HyperPage_paragraph (this, paragraph -> text); break;
			case  kManPage_type::LIST_ITEM: HyperPage_listItem (this, paragraph -> text); break;
			case  kManPage_type::TAG: HyperPage_listTag (this, paragraph -> text); break;
			case  kManPage_type::DEFINITION: HyperPage_definition (this, paragraph -> text); break;
			case  kManPage_type::CODE: HyperPage_code (this, paragraph -> text); break;
			case  kManPage_type::PROTOTYPE: HyperPage_prototype (this, paragraph -> text); break;
			case  kManPage_type::FORMULA: HyperPage_formula (this, paragraph -> text); break;
			case  kManPage_type::PICTURE: HyperPage_picture (this, paragraph -> width,
				paragraph -> height, paragraph -> draw); break;
			case  kManPage_type::SCRIPT: HyperPage_script (this, paragraph -> width,
				paragraph -> height, paragraph -> text); break;
			case  kManPage_type::LIST_ITEM1: HyperPage_listItem1 (this, paragraph -> text); break;
			case  kManPage_type::LIST_ITEM2: HyperPage_listItem2 (this, paragraph -> text); break;
			case  kManPage_type::LIST_ITEM3: HyperPage_listItem3 (this, paragraph -> text); break;
			case  kManPage_type::TAG1: HyperPage_listTag1 (this, paragraph -> text); break;
			case  kManPage_type::TAG2: HyperPage_listTag2 (this, paragraph -> text); break;
			case  kManPage_type::TAG3: HyperPage_listTag3 (this, paragraph -> text); break;
			case  kManPage_type::DEFINITION1: HyperPage_definition1 (this, paragraph -> text); break;
			case  kManPage_type::DEFINITION2: HyperPage_definition2 (this, paragraph -> text); break;
			case  kManPage_type::DEFINITION3: HyperPage_definition3 (this, paragraph -> text); break;
			case  kManPage_type::CODE1: HyperPage_code1 (this, paragraph -> text); break;
			case  kManPage_type::CODE2: HyperPage_code2 (this, paragraph -> text); break;
			case  kManPage_type::CODE3: HyperPage_code3 (this, paragraph -> text); break;
			case  kManPage_type::CODE4: HyperPage_code4 (this, paragraph -> text); break;
			case  kManPage_type::CODE5: HyperPage_code5 (this, paragraph -> text); break;
			default: break;
		}
	}
	if (ManPages_uniqueLinksHither (manPages, our visiblePageNumber)) {
		integer ilink, jlink;
		bool goAhead = true;
		if (page -> paragraphs.size > 0) {
			conststring32 text = page -> paragraphs [page -> paragraphs.size]. text;
			if (! text || text [0] == U'\0' || text [str32len (text) - 1] != U':') {
				if (our printing && our suppressLinksHither)
					goAhead = false;
				else
					HyperPage_entry (this, U"Links to this page");
			}
		}
		if (goAhead) for (ilink = 1; ilink <= page -> linksHither.size; ilink ++) {
			integer link = page -> linksHither [ilink];
			bool alreadyShown = false;
			for (jlink = 1; jlink <= page -> linksThither.size; jlink ++)
				if (page -> linksThither [jlink] == link)
					alreadyShown = true;
			if (! alreadyShown) {
				conststring32 title = manPages -> pages.at [page -> linksHither [ilink]] -> title.get();
				char32 linkText [304];
				Melder_sprint (linkText, 304, U"@@", title, U"@");
				HyperPage_listItem (this, linkText);
			}
		}
	}
	if (! our printing && page -> date) {
		char32 signature [100];
		integer date = page -> date;
		const integer imonth = Melder_clipped (0_integer, date % 10000 / 100, 12_integer);
		Melder_sprint (signature,100,
			U"© ", str32equ (page -> author.get(), U"ppgb") ? U"Paul Boersma" :
			       str32equ (page -> author.get(), U"djmw") ? U"David Weenink" : page -> author.get(),
			U", ", date % 100,
			U" ", month [imonth],
			U" ", date / 10000);
		HyperPage_any (this, U"", our p_font, our p_fontSize, 0, 0.0,
			0.0, 0.0, 0.1, 0.1, HyperPage_ADD_BORDER);
		HyperPage_any (this, signature, our p_font, our p_fontSize, Graphics_ITALIC, 0.0,
			0.03, 0.0, 0.1, 0.0, 0);
	}
}

/********** PRINTING **********/

static void print (void *void_me, Graphics graphics) {
	iam (Manual);
	ManPages manPages = (ManPages) my data;
	integer numberOfPages = manPages -> pages.size, saveVisiblePageNumber = my visiblePageNumber;
	my ps = graphics;
	Graphics_setDollarSignIsCode (my ps, true);
	Graphics_setAtSignIsLink (my ps, true);
	my printing = true;
	HyperPage_initSheetOfPaper ((HyperPage) me);
	for (integer ipage = 1; ipage <= numberOfPages; ipage ++) {
		ManPage page = manPages -> pages.at [ipage];
		if (my printPagesStartingWith == nullptr ||
		    Melder_stringMatchesCriterion (page -> title.get(), kMelder_string::STARTS_WITH, my printPagesStartingWith, true))
		{
			my visiblePageNumber = ipage;
			my currentPageTitle = Melder_dup_f (page -> title.get());
			my v_goToPage_number (ipage);
			my v_draw ();
			my v_goToPage_number (saveVisiblePageNumber);
		}
	}
	my printing = false;
	my printPagesStartingWith = nullptr;
}

static void menu_cb_printRange (Manual me, EDITOR_ARGS_FORM) {
	EDITOR_FORM (U"Print range", nullptr)
		SENTENCE (leftOrInsideHeader, U"Left or inside header", U"")
		SENTENCE (middleHeader, U"Middle header", U"")
		SENTENCE (rightOrOutsideHeader, U"Right or outside header", U"Manual")
		SENTENCE (leftOrInsideFooter, U"Left or inside footer", U"")
		SENTENCE (middleFooter, U"Middle footer", U"")
		SENTENCE (rightOrOutsideFooter, U"Right or outside footer", U"")
		BOOLEAN (mirrorEvenOddHeaders, U"Mirror even/odd headers", true)
		TEXTFIELD (printAllPagesWhoseTitleStartsWith, U"Print all pages whose title starts with:", U"Intro")
		INTEGER (firstPageNumber, U"First page number", U"1")
		BOOLEAN (suppressLinksToThisPage, U"Suppress \"Links to this page\"", false)
	EDITOR_OK
		ManPages manPages = (ManPages) my data;
		time_t today = time (nullptr);
		char dateA [50];
		#ifdef UNIX
			struct tm *tm = localtime (& today);
			strftime (dateA, 50, "%B %e, %Y", tm);
		#else
			strcpy (dateA, ctime (& today));
		#endif
		autostring32 date = Melder_8to32 (dateA);
		char32 *newline = str32chr (date.get(), U'\n');
		if (newline)
			*newline = U'\0';
		SET_STRING (leftOrInsideHeader, date.get())
		SET_STRING (rightOrOutsideHeader, my name.get())
		if (my d_printingPageNumber) SET_INTEGER (firstPageNumber, my d_printingPageNumber + 1)
		if (my visiblePageNumber >= 1 && my visiblePageNumber <= manPages -> pages.size) {
			ManPage page = manPages -> pages.at [my visiblePageNumber];
			SET_STRING (printAllPagesWhoseTitleStartsWith, page -> title.get());
		}
	EDITOR_DO
		my insideHeader = leftOrInsideHeader;
		my middleHeader = middleHeader;
		my outsideHeader = rightOrOutsideHeader;
		my insideFooter = leftOrInsideFooter;
		my middleFooter = middleFooter;
		my outsideFooter = rightOrOutsideFooter;
		my mirror = mirrorEvenOddHeaders;
		my printPagesStartingWith = printAllPagesWhoseTitleStartsWith;
		my d_printingPageNumber = firstPageNumber;
		my suppressLinksHither = suppressLinksToThisPage;
		Printer_print (print, me);
	EDITOR_END
}

/********** SEARCHING **********/

static double searchToken (ManPages me, integer ipage, conststring32 token) {
	double goodness = 0.0;
	ManPage page = my pages.at [ipage];
	if (! token [0])
		return 1.0;
	/*
		Try to find a match in the title, case-insensitively.
	*/
	static MelderString buffer;
	MelderString_copy (& buffer, page -> title.get());
	for (char32 *p = & buffer.string [0]; *p != U'\0'; p ++)
		*p = Melder_toLowerCase (*p);
	if (str32str (buffer.string, token)) {
		goodness += 300.0;   // lots of points for a match in the title!
		if (str32equ (buffer.string, token))
			goodness += 10000.0;   // even more points for an exact match!
	}
	/*
		Try to find a match in the paragraphs, case-insensitively.
	*/
	for (integer ipar = 1; ipar <= page -> paragraphs.size; ipar ++) {
		ManPage_Paragraph par = & page -> paragraphs [ipar];
		if (par -> text) {
			char32 *ptoken;
			MelderString_copy (& buffer, par -> text);
			for (char32 *p = & buffer.string [0]; *p != '\0'; p ++)
				*p = Melder_toLowerCase (*p);
			ptoken = str32str (buffer.string, token);
			if (ptoken) {
				goodness += 10.0;   // ten points for every paragraph with a match!
				if (str32str (ptoken + str32len (token), token))
					goodness += 1.0;   // one point for every second occurrence in a paragraph!
			}
		}
	}
	return goodness;
}

static void search (Manual me, conststring32 query) {
	ManPages manPages = (ManPages) my data;
	integer numberOfPages = manPages -> pages.size;
	static MelderString searchText;
	MelderString_copy (& searchText, query);
	for (char32 *p = & searchText.string [0]; *p != U'\0'; p ++) {
		if (*p == U'\n')
			*p = U' ';
		*p = Melder_toLowerCase (*p);
	}
	static autoVEC goodnessOfMatch;
	if (NUMisEmpty (goodnessOfMatch))
		goodnessOfMatch = newVECzero (numberOfPages);
	for (integer ipage = 1; ipage <= numberOfPages; ipage ++) {
		char32 *token = searchText.string;
		goodnessOfMatch [ipage] = 1.0;
		for (;;) {
			char32 *space = str32chr (token, U' ');
			if (space)
				*space = U'\0';
			goodnessOfMatch [ipage] *= searchToken (manPages, ipage, token);
			if (! space)
				break;
			*space = U' ';   // restore
			token = space + 1;
		}
	}
	/*
		Find the 20 best matches.
	*/
	my numberOfMatches = 0;
	for (integer imatch = 1; imatch <= 20; imatch ++) {
		integer imax = 0;
		double max = 0.0;
		for (integer ipage = 1; ipage <= numberOfPages; ipage ++) {
			if (goodnessOfMatch [ipage] > max) {
				max = goodnessOfMatch [ipage];
				imax = ipage;
			}
		}
		if (! imax) break;
		my matches [++ my numberOfMatches] = imax;
		goodnessOfMatch [imax] = 0.0;   // skip next time
	}
	HyperPage_goToPage_number (me, SEARCH_PAGE);
}

void Manual_search (Manual me, conststring32 query) {
	GuiText_setString (my searchText, query);
	search (me, query);
}

static void gui_button_cb_home (Manual me, GuiButtonEvent /* event */) {
	ManPages pages = (ManPages) my data;
	integer iHome = ManPages_lookUp (pages, U"Intro");
	HyperPage_goToPage_number (me, iHome ? iHome : 1);
}
 
static void gui_button_cb_record (Manual me, GuiButtonEvent /* event */) {
	ManPages manPages = (ManPages) my data;
	ManPage manPage = ( my visiblePageNumber < 1 ? nullptr : manPages -> pages.at [my visiblePageNumber] );
	GuiThing_setSensitive (my recordButton,  false);
	GuiThing_setSensitive (my playButton,    false);
	GuiThing_setSensitive (my publishButton, false);
	#if defined (_WIN32)
		GdiFlush ();
	#endif
	if (! Melder_record (manPage == nullptr ? 1.0 : manPage -> recordingTime)) Melder_flushError ();
	GuiThing_setSensitive (my recordButton,  true);
	GuiThing_setSensitive (my playButton,    true);
	GuiThing_setSensitive (my publishButton, true);
}

static void gui_button_cb_play (Manual me, GuiButtonEvent /* event */) {
	GuiThing_setSensitive (my recordButton,  false);
	GuiThing_setSensitive (my playButton,    false);
	GuiThing_setSensitive (my publishButton, false);
	#if defined (_WIN32)
		GdiFlush ();
	#endif
	Melder_play ();
	GuiThing_setSensitive (my recordButton,  true);
	GuiThing_setSensitive (my playButton,    true);
	GuiThing_setSensitive (my publishButton, true);
}

static void gui_button_cb_publish (Manual /* me */, GuiButtonEvent /* event */) {
	Melder_publishPlayed ();
}

static void do_search (Manual me) {
	autostring32 query = GuiText_getString (my searchText);
	search (me, query.get());
}

static void gui_button_cb_search (Manual me, GuiButtonEvent /* event */) {
	do_search (me);
}

void structManual :: v_createChildren () {
	ManPages pages = (ManPages) our data;   // has been installed here by Editor_init ()
	our d_hasExtraRowOfTools = pages -> dynamic;
	Manual_Parent :: v_createChildren ();
	#if defined (macintosh)
		#define STRING_SPACING 8
	#else
		#define STRING_SPACING 2
	#endif
	int height = Machine_getTextHeight (), y = Machine_getMenuBarHeight () + 4;
	our homeButton = GuiButton_createShown (our windowForm, 104, 168, y, y + height,
		U"Home", gui_button_cb_home, this, 0);
	if (pages -> dynamic) {
		our recordButton = GuiButton_createShown (our windowForm, 4, 79, y+height+8, y+height+8 + height,
			U"Record", gui_button_cb_record, this, 0);
		our playButton = GuiButton_createShown (our windowForm, 85, 160, y+height+8, y+height+8 + height,
			U"Play", gui_button_cb_play, this, 0);
		our publishButton = GuiButton_createShown (our windowForm, 166, 166 + 175, y+height+8, y+height+8 + height,
			U"Copy last played to list", gui_button_cb_publish, this, 0);
	}
	GuiButton_createShown (our windowForm, 274, 274 + 69, y, y + height,
		U"Search:", gui_button_cb_search, this, GuiButton_DEFAULT);
	our searchText = GuiText_createShown (our windowForm, 274+69 + STRING_SPACING, 452 + STRING_SPACING - 2, y, y + Gui_TEXTFIELD_HEIGHT, 0);
}

static void menu_cb_help (Manual me, EDITOR_ARGS_DIRECT) { HyperPage_goToPage (me, U"Manual"); }

void structManual :: v_createMenus () {
	Manual_Parent :: v_createMenus ();

	Editor_addCommand (this, U"File", U"Print manual...", 0, menu_cb_printRange);
	Editor_addCommand (this, U"File", U"Save page as HTML file...", 0, menu_cb_writeOneToHtmlFile);
	Editor_addCommand (this, U"File", U"Save manual to HTML directory...", 0, menu_cb_writeAllToHtmlDir);
	Editor_addCommand (this, U"File", U"-- close --", 0, nullptr);

	Editor_addCommand (this, U"Go to", U"Search for page (list)...", 0, menu_cb_searchForPageList);
}

void structManual :: v_createHelpMenuItems (EditorMenu menu) {
	Manual_Parent :: v_createHelpMenuItems (menu);
	EditorMenu_addCommand (menu, U"Manual help", '?', menu_cb_help);
}

void structManual :: v_defaultHeaders (EditorCommand cmd) {
	Manual me = (Manual) cmd -> d_editor;
	ManPages manPages = (ManPages) my data;
	if (my visiblePageNumber > 0) {
		char32 string [400];
		static const conststring32 shortMonth [] =
			{ U"Jan", U"Feb", U"Mar", U"Apr", U"May", U"Jun", U"Jul", U"Aug", U"Sep", U"Oct", U"Nov", U"Dec" };
		ManPage page = manPages -> pages.at [my visiblePageNumber];
		integer date = page -> date;
		SET_STRING (my outsideHeader, page -> title.get())
		SET_STRING (my insideFooter, page -> author.get())
		if (date) {
			Melder_sprint (string,400, shortMonth [date % 10000 / 100 - 1], U" ", date % 100, U", ", date / 10000);
			SET_STRING (my insideHeader, string)
		}
	}
}

integer structManual :: v_getNumberOfPages () {
	ManPages manPages = (ManPages) our data;
	return manPages -> pages.size;
}

integer structManual :: v_getCurrentPageNumber () {
	return our visiblePageNumber > 0 ? our visiblePageNumber : 1;
}

void structManual :: v_goToPage_number (integer goToPageNumber) {
	ManPages manPages = (ManPages) our data;
	if (goToPageNumber < 1 || goToPageNumber > manPages -> pages.size) {
		if (goToPageNumber == SEARCH_PAGE) {
			our visiblePageNumber = SEARCH_PAGE;
			our currentPageTitle. reset();
			return;
		} else Melder_throw (U"Page ", goToPageNumber, U" not found.");
	}
	our visiblePageNumber = goToPageNumber;
	ManPage page = manPages -> pages.at [our visiblePageNumber];
	our currentPageTitle = Melder_dup_f (page -> title.get());
}

int structManual :: v_goToPage (conststring32 title) {
	ManPages manPages = (ManPages) our data;
	if (title [0] == U'\\' && title [1] == U'F' && title [2] == U'I') {
		structMelderFile file { };
		MelderDir_relativePathToFile (& manPages -> rootDirectory, title + 3, & file);
		Melder_recordFromFile (& file);
		return -1;
	} else if (title [0] == U'\\' && title [1] == U'S' && title [2] == U'C') {
		autoMelderSetDefaultDir dir (& manPages -> rootDirectory);
		autoPraatBackground background;
		try {
			autostring32 fileNameWithArguments = Melder_dup (title + 3);
			praat_executeScriptFromFileNameWithArguments (fileNameWithArguments.get());
		} catch (MelderError) {
			Melder_flushError ();
		}
		return 0;
	} else {
		integer i = ManPages_lookUp (manPages, title);
		if (! i)
			Melder_throw (U"Page \"", title, U"\" not found.");
		our v_goToPage_number (i);
		return 1;
	}
}

void Manual_init (Manual me, conststring32 title, Daata data, bool ownData) {
	ManPages manPages = (ManPages) data;
	integer lookUpPageNumber;
	if ((lookUpPageNumber = ManPages_lookUp (manPages, title)) == 0)
		Melder_throw (U"Page \"", title, U"\" not found.");
	my visiblePageNumber = lookUpPageNumber;
	ManPage page = manPages -> pages.at [lookUpPageNumber];

	/*
		The title of the window is the title of the whole manual, not the title of the page.
		If the first page has a title that starts with "-", then that is the title;
		otherwise, the title is just "Manual".
	*/
	char32 windowTitle [101];
	if (manPages -> pages.at [1] -> title [0] == U'-') {
		Melder_sprint (windowTitle,101, & manPages -> pages.at [1] -> title [1]);
		if (windowTitle [str32len (windowTitle) - 1] == U'-')
			windowTitle [str32len (windowTitle) - 1] = U'\0';
	} else {
		Melder_sprint (windowTitle,101, U"Manual");
	}
	my ownData = ownData;
	HyperPage_init (me, windowTitle, data);
	MelderDir_copy (& manPages -> rootDirectory, & my rootDirectory);
	my history [0]. page = Melder_dup_f (title);   // BAD
}

autoManual Manual_create (conststring32 title, Daata data, bool ownData) {
	try {
		autoManual me = Thing_new (Manual);
		Manual_init (me.get(), title, data, ownData);
		return me;
	} catch (MelderError) {
		Melder_throw (U"Manual window not created.");
	}
}

/* End of file Manual.cpp */
