import action
import compat2and3


# Welcome to my new blog.
#
# Now it's perhaps not even Gtks fault, but all the gory implementation
# details of XDND are pretty gory. And not much documentatiion lives up
# to reality anymore.
#
# Almost only the ridiculous `TEXT/URI-LIST` is used in practice. Without
# host names, of course, despite the spec saying otherwise. (It perhaps
# leaked into the Gnome UI, and they decreed it banished). And needless
# to say, there's no actual IRI (or "URI" if you've been living under a
# rock for two decades) support in any file manager or pairing clients
# beyond local paths.
#
# Supporting PLS, XSPF, M3U as direct payload was a pointless exercise.
# It's not gonna get requested by anyone. Instead there's another config
# option now, which predefines the exchange format for temporary file:///
# dumps. Because, you know, there was never any point in type negotiation
# due to all the API overhead. There's no way to indicate any actually
# supported content types per text/uri-list.
#
# What works, and what's widely used in practice instead, is declaring
# yet another custom type per application. Our row format is transferred
# unfiltered over the selection buffer as JSON. However, it's decidedly
# never exposed to other apps as x-special/x-custom whatever. (It's also
# not using the MIME 1.0 application/* trash bin for that very reason.)

      ("application/x-desktop", 0, 26),
      # direct srv urls
      ("text/url", 0, 15),  #@TODO: support in action.save_/convert_
      ("message/external-body", 0, 15),
      ("url/direct", 0, 15),
      # filename, file:// IRL
      ("FILE_NAME", 0, 3),
#     ("text/uri-list;x-format=xspf,pls,m3u,jspf,smil,http", 0, 4),
      ("text/uri-list", 0, 4),
      # url+comments
      ("TEXT", 0, 5),
      ("STRING", 0, 5),
      ("UTF8_STRING", 0, 5),
      ("text/plain", 0, 5),
    ]

    # Target window/app requests data for offered drop
    def data_get(self, widget, context, selection, info, time):
        log.DND("source→out: data-get, send and convert to requested target type:", info, selection.get_target())
        # Return prepared data
        func, data = self.export_row(info, self.row)
        log.DND("data==", func, data)
        if func.find("text") >= 0:
            try:
                # Yay for trial and error. Nay for docs. PyGtks selection.set_text() doesn't
                # actually work unless the requested target type is an Atom. Therefore "STRING".
                selection.set("STRING", 8, data)
            except:
                # Except of course Gtk3, where an Atom is required, but neither
                # gtk.gdk.TARGET_STRING nor selection.get_target() actually do
                selection.set_text(data, len(data))
        if func.find("uris") >= 0:
            selection.set_uris(data)
        return True

    # Handles the conversion from the stored .row to the desired selection data
    def export_row(self, info, r):

    # -- DESTINATION, when playlist/file gets dragged into ST2 from other app --

    # Just a notification for incoming drop
    def drop(self, widget, context, x, y, time):
        log.DND("dest←in: drop-probing, possible targets:", context.targets)
        # find a matching target
        targets = [t.split(";")[0] for t in context.targets]
        accept = [type[0] for type in self.drag_types if type[0] in targets]
        context.drop_reply(len(accept) > 0, time)
        if accept:
                widget.drag_get_data(context, accept[0], time) or True
        return True

    # Actual data is being passed,
    def data_received(self, widget, context, x, y, selection, info, time):

            log.DND("Received row in internal format, append+reload")
            rows += [ json.loads(data) ]

        # Convertible formats as direct payload
        elif data and info >= 5:
            log.DND("Converting direct payload playlist")
            cnv = action.extract_playlist(data)
            if info >= 20:
                fmt = self.cnv_types[info]
            else:
                fmt = cnv.probe_fmt()
                if fmt == "href": fmt = "raw"
            add = cnv.rows(fmt)
            rows += [ cnv.mkrow(row) for row in add ]

        # Extract from playlist files, either passed as text/uri-list or single FILE_NAME
        elif urls:
            log.DND("Importing from playlist file")
            for fn in urls or [data]:
                if not re.match("^(scp|file)://(localhost)?/|/", fn):
                    continue
                fn = compat2and3.urldecode(re.sub("^\w+://[^/]*", "", fn))
                cnv = action.extract_playlist(fn=fn)
                if cnv.src:
                    rows += [ cnv.mkrow(row) for row in cnv.rows() ]
        
        # Insert and update view
        if rows:
            cn.insert_rows(rows, y)

            cn.save()
            # Show streamedit window if title is empty
            if not len(rows[0].get("title", "")):
                self.parent.configwin.load_config(rows[0], "streamedit_")
                self.parent.win_streamedit.show()
        else:
            self.parent.status("Unsupported station format. Not imported.")