/*
README to .guide converter $Ver: 0.13 (29.01.2016)

This script converts the pure ASCII-text based README file of ScummVM to a
basic Amiga guide file.

More AmigaGuide features being added in the process if feasible.
*/

PARSE ARG readme_txt

/* Check if the given file is really the readme */
/* If a given filename has spaces in it's name, AmigaDOS/AmigaCLI will add extra quotation marks
to secure a sane working path. We get rid of them to make AREXX find the file */
readme_txt=COMPRESS(readme_txt,'"')
OPEN(check_readme,readme_txt,'R')
IF READCH(check_readme,14) = 'ScummVM README' THEN
	CLOSE(check_readme)
ELSE DO
	SAY "Not the README file. Aborting!"
	CLOSE(readme_read)
	EXIT 0
END

/* If it's the proper file, lets start converting */

OPEN(readme_read,readme_txt,'R')
OPEN(guide_write,'README.guide','W')

/* Prepare the Amiga guide file, add the intro and fixed text */

WRITELN(guide_write,'@DATABASE ScummVM README.guide')
WRITELN(guide_write,'@WORDWRAP')
WRITELN(guide_write,'@NODE "main" "ScummVM README Guide"')
WRITELN(guide_write,' ')
WRITELN(guide_write,'@{b}')
WRITELN(guide_write,READLN(readme_read))
WRITELN(guide_write,'@{ub}')

/* Creating the main link nodes */

x=1

DO WHILE EOF(readme_read) = 0
	/* Read in the line */
	working_line=READLN(readme_read)

	/* Checking if the sub links have been reached and leave the loop, if met */
	IF POS('°1.0°',working_line) = 1 & x > 1 THEN
		LEAVE
	ENDIF
	/* If no chapter has been found, simply write the line */
	IF POS('°',working_line) = 0 THEN
		WRITELN(guide_write,working_line)
	ENDIF

	/* Fix the empty chapters - two chapters (1.0 and 7.8) are empty and consist of only the headlines.
	    We add them to the following chapter and link both of them to the empty one */

	/* If chapter 1.1 is found add a link node to 1.0 (as chapter 1.0 is empty) */
	IF POS(' * °1.1°',working_line) = 1 THEN DO
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
		WRITELN(guide_write,'    @{" 1.1 " Link "1.0"} 'working_line)
	END

	/* If chapter 7.8.1 is found add a link node to 7.8 (as chapter 7.8  is empty) */
	IF POS(' * * °7.8.1°',working_line) = 1 THEN DO
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
		WRITELN(guide_write,'      @{" 7.8.1 " Link "7.8"} 'working_line)
	END

	/* If a single number main chapter is found 1.0 upto 9.0), prepare and write the link node */
	IF POS('.0',working_line) = 3 THEN DO
		WRITELN(guide_write,' ')
		WRITELN(guide_write,'  @{" 'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1) '" Link "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'"} 'COMPRESS(working_line,'*°'))
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
		x=x+1
	END

	/* If a double number main chapter is found (10.0 ff), prepare and write the link node */
	IF POS('.0',working_line) = 4 THEN DO
		WRITELN(guide_write,' ')
		WRITELN(guide_write,'  @{" 'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1) '" Link "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'"} 'COMPRESS(working_line,'*°'))
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
	END

	/* If a level one sub chapter is found (i.e. 1.1), prepare and write the link node */
	IF POS(' * °',working_line) = 1 THEN DO
		WRITELN(guide_write,'    @{" 'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1) '" Link "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'"} 'COMPRESS(working_line,'*°'))
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
	END

	/* If a level two sub chapter is found (i.e. 1.1.1), prepare and write the link node */
	IF POS(' * * °',working_line) = 1 THEN DO
		WRITELN(guide_write,'      @{" 'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1) '" Link "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'"} 'COMPRESS(working_line,'*°'))
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'*°')
	END
END

/* Finish the TOC, hardcoded due the outro text getting read in last, but needs to be read/written after the TOC creation */
WRITELN(guide_write,'------------------------------------------------------------------------')
WRITELN(guide_write,'Good Luck and Happy Adventuring!')
WRITELN(guide_write,'The ScummVM team.')
WRITELN(guide_write,'@{"http://www.scummvm.org/" System "URLOpen http://www.scummvm.org/"}')
WRITELN(guide_write,'------------------------------------------------------------------------')

/* Creating the sub links nodes */

DO WHILE EOF(readme_read) = 0
	/* If no chapter has been found, simply write the line */
	IF POS('°',working_line) = 0 THEN
		WRITELN(guide_write,working_line)
	ENDIF

	/* Fix the empty chapters - two chapters (1.0 and 7.8) are empty and consist of only the Headlines.
	    We don't close the NODE, rather add the following chapter to the former empty one */

	/* If chapter 1.1 is found don't close the NODE, just write the line */
	IF POS('°1.1°',working_line) = 1 THEN DO
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'°')
		WRITELN(guide_write,working_line)
	END
	/* If chapter 7.8.1 is found don't close the NODE, just write the line */
	IF POS('°7.8.1°',working_line) = 1 THEN DO
		/* Get rid of the markers so the following loops doesn't process them again */
		working_line=COMPRESS(working_line,'°')
		WRITELN(guide_write,working_line)
	END

	IF POS('°',working_line) > 0 THEN DO
		/* Check for link references inside the text and create link nodes for them */
		IF POS('section °',working_line) > 0 THEN DO
			working_line=SUBSTR(working_line,1,POS('°',working_line)-1)'@{"'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'" Link "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'"}'SUBSTR(working_line,LASTPOS('°',working_line)+1)
			/* Get rid of the markers so the following loops doesn't process them again */
			WRITELN(guide_write,COMPRESS(working_line,'°'))
		END
		ELSE DO
		/* If a chapter has been found, prepare and write the link */
		WRITELN(guide_write,'@ENDNODE')
		WRITELN(guide_write,'@NODE "'SUBSTR(working_line,POS('°',working_line)+1,LASTPOS('°',working_line)-POS('°',working_line)-1)'" "'COMPRESS(working_line,'°')'"')
		WRITELN(guide_write,' ')
		/* Get rid of the markers so the following loops doesn't process them again */
		WRITELN(guide_write,COMPRESS(working_line,'°'))
		END
	END

	/* Read in the line at the end of the second loop, as the first line to work with was already read in on the end of the first loop */
	working_line=READLN(readme_read)

	/* If the outtro text is found, leave the loop and prepare for closing */
	IF POS('------------------------------------------------------------------------',working_line) > 0 THEN
		LEAVE
	ENDIF
END

WRITELN(guide_write,'@ENDNODE')

/* Closing the guide and cleaning up */
WRITELN(guide_write,'@ENDNODE')

CLOSE(readme_read)
CLOSE(guide_write)
EXIT 0