#!/bin/sh
# Tcl ignores the next line -*- tcl -*- \
exec tclsh "$0" -- "$@"

# This is a really stupid program, which serves as an alternative to
# msgfmt.  It _only_ translates to Tcl mode, does _not_ validate the
# input, and does _not_ output any statistics.

proc u2a {s} {
	set res ""
	foreach i [split $s ""] {
		scan $i %c c
		if {$c<128} {
			# escape '[', '\' and ']'
			if {$c == 0x5b || $c == 0x5d} {
				append res "\\"
			}
			append res $i
		} else {
			append res \\u[format %04.4x $c]
		}
	}
	return $res
}

set output_directory "."
set lang "dummy"
set files [list]

# parse options
for {set i 1} {$i < $argc} {incr i} {
	set arg [lindex $argv $i]
	if {$arg == "--statistics" || $arg == "--tcl"} {
		continue
	}
	if {$arg == "-l"} {
		incr i
		set lang [lindex $argv $i]
		continue
	}
	if {$arg == "-d"} {
		incr i
		set tmp [lindex $argv $i]
		regsub "\[^/\]$" $tmp "&/" output_directory
		continue
	}
	lappend files $arg
}

proc flush_msg {} {
	global msgid msgstr mode lang out

	if {![info exists msgid] || $mode == ""} {
		return
	}
	set mode ""

	if {$msgid == ""} {
		set prefix "set ::msgcat::header"
	} else {
		set prefix "::msgcat::mcset $lang \"[u2a $msgid]\""
	}

	puts $out "$prefix \"[u2a $msgstr]\""
}

foreach file $files {
	regsub "^.*/\(\[^/\]*\)\.po$" $file "$output_directory\\1.msg" outfile
	set in [open $file "r"]
	fconfigure $in -encoding utf-8
	set out [open $outfile "w"]

	set mode ""
	while {[gets $in line] >= 0} {
		if {[regexp "^#" $line]} {
			flush_msg
			continue
		} elseif {[regexp "^msgid \"(.*)\"$" $line dummy match]} {
			flush_msg
			set msgid $match
			set mode "msgid"
		} elseif {[regexp "^msgstr \"(.*)\"$" $line dummy match]} {
			set msgstr $match
			set mode "msgstr"
		} elseif {$line == ""} {
			flush_msg
		} elseif {[regexp "^\"(.*)\"$" $line dummy match]} {
			if {$mode == "msgid"} {
				append msgid $match
			} elseif {$mode == "msgstr"} {
				append msgstr $match
			} else {
				puts stderr "I do not know what to do: $match"
			}
		} else {
			puts stderr "Cannot handle $line"
		}
	}
	flush_msg
	close $in
	close $out
}