#compdef exiv2
## completion for exiv2 0.20, based on exiv2(1)

function _exiv2_command_or_file {
	_alternative \
	'options:command:_exiv2_command' \
	'files:file:_files'
}

function _exiv2_command {
	typeset -a commands
	commands=(
		'print:print metadata (default)'
		'extract:extract metadata'
		'insert:insert metadata'
		'delete:delete metadata'
		'adjust:adjust exif timestamps'
		'modify:modify metadata'
		'rename:rename files basd on exif data'
		'fixiso:fix ISO tag for Nikon/Canon makernotes'
		'fixcom:fix encoding of user comments'
	)
	_describe command commands
}

function _exiv2_targets {
	typeset target=$*[-1]
	typeset target_opchar=$target[1]
	typeset -a targets ignored
	targets=(
		'a:all metadata'
		'e:Exif section'
		't:Exif thumbnail'
		'i:IPTC data'
		'x:XMP packet'
		'c:JPEG comment'
	)

	case $target in
		insert) targets+='X:insert XMP metadata' ;;
		extract) targets+=(
				'p:extract preview files'
				'X:extract XMP metadata'
			)
			;;
	esac

	ignored=(${(s::)words[$CURRENT]#-*${target_opchar}})

	_describe "${target} targets" targets \
	-F ignored -qS '' -P "${words[$CURRENT]#-*${target_opchar}}"
}

function _exiv2_print_mode {
	typeset -a modes
	modes=(
		's:Exif summary'
		'a:Exif, IPTC and XMP metadata'
		't:interpreted Exif tags'
		'v:plain Exif tags'
		'h:hexdump of Exif data'
		'i:IPTC datasets'
		'x:XMP properties'
		'c:JPEG comment'
		'p:image previews'
	)
	_describe mode modes
}

function _exiv2_print_flags {
	typeset -a flags ignored
	flags=(
		'E:include Exif tags'
		'I:IPTC datasets'
		'X:XMP properties'
		'x:column with tag number'
		'g:group name'
		'k:key'
		'l:tag label'
		'n:tag name'
		'y:type'
		'c:number of components'
		's:size (bytes)'
		'v:plain data value'
		't:interpreted data'
		'h:hexdump of data'
	)

	ignored=(${(s::)words[$CURRENT]#-*P})

	_describe 'print flags' flags \
	-F ignored -qS '' -P "${words[$CURRENT]#-*P}"
}

function _exiv2 {
	_arguments -s \
	'(- 1 *)-h[show help]' \
	'(- 1 *)-V[show version]' \
	'-v[be verbose]' \
	'-b[show large binary values]' \
	'-u[show unknown tags]' \
	'*-g-[grep by exiv2 key]:exiv2 key' \
	'-n-[charset to decode user comments]:charset' \
	'(-t -T)-k[preserve file timestamps when updating]' \
	'(-k)-t[set file timestamps according to EXIF data when renaming]' \
	'(-k)-T[only set timestamp, do not rename]' \
	'-f[force overwrite of files]' \
	'-F[force rename of files]' \
	'-a-[adjust time]:HH[\:MM[\:SS]] time delta' \
	'-Y-[adjust year]:year delta' \
	'-O-[adjust month]:month delta' \
	'-D-[adjust day]:day delta' \
	'-p-[print mode]: :_exiv2_print_mode' \
	'-P-[print flags]:print flags:_exiv2_print_flags' \
	'-d-[delete targets]: :_exiv2_targets delete' \
	'-i-[insert targets]: :_exiv2_targets insert' \
	'-e-[extract targets]: :_exiv2_targets extract' \
	'-r-[file rename format]:file format' \
	'-c-[JPEG comment string]:comment' \
	'-m-[set command file]:command file:_files' \
	'-M-[set modify command line]:command' \
	'-l-[set directory for inserted/extracted files]:directory:_path_files -/' \
	'-S-[set source file suffix]:suffix' \
	': :_exiv2_command_or_file' \
	'*:file:_files'
}

_exiv2 "$@"