# encoding: UTF-8
# api: streamtuner2
# title: Drag and Drop (experimental)
# description: Copy streams/stations from and to other applications.
# depends: uikit
# version: 0.5
# type: interface
# config:
#   { name: dnd_format, type: select, value: xspf, select: "pls|m3u|xspf|jspf|asx|smil", description: "Default temporary file format for copying a station entry." }
# category: ui
# priority: experimental
#
# Implements Gtk/X11 drag and drop support for station lists.
# Should allow to export either just stream URLs, or complete
# PLS, XSPF collections.
#
# Also used by the bookmarks channel to copy favourites around.
# Which perhaps should even be constrained to just the bookmarks
# tab.


import copy
from config import conf, json, log
from uikit import *
import action

      ("text/uri-list", 0, 4),
      # url+comments
      ("TEXT", 0, 5),
      ("STRING", 0, 5),
      ("UTF8_STRING", 0, 5),
      ("text/plain", 0, 5),
    ]
    
    # Map target/`info` integers to action. module identifiers
    cnv_types = {
       20: "m3u",
       21: "pls",
       22: "xspf",
       23: "smil",
       25: "jspf",
       15: "srv",

    # Keep currently selected row when source dragging starts
    def treelist_row(self):
        cn = self.parent.channel()
        row = copy.copy(cn.row())
        row.setdefault("format", cn.audioformat)
        row.setdefault("listformat", cn.listformat)
        row.setdefault("url", row.get("homepage"))
        row.update({"_origin": [cn.module, cn.current, cn.rowno()]}) # internal: origin channel+genre+rowid
        return row
    
    # 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)
        if func.find("text") >= 0:
            # Yay for trial and error. Nay for docs. PyGtks selection.set_text() doesn't

        # incoming data
        data = selection.get_text()
        urls = selection.get_uris()
        any = (data or urls) and True

        # Convert/Add

        if any: self.import_row(info, urls, data, y)

        else: log.DND("Abort, no urls/text.")
        
        # Respond
        context.drop_finish(any, time)
        context.finish(any, False, time)
        return True

    # Received files or payload has to be converted, copied into streams
    def import_row(self, info, urls, data, y=5000):
        # Internal target dicts
        cn = self.parent.channel()
        rows = []
        print info
                
        # Direct/internal row import
        if data and info >= 51:
            log.DND("Received row, append, reload")
            rows += [ json.loads(data) ]

        # Convertible formats
        elif data and info >= 5:
            cnv = action.extract_playlist(data)
            urls = cnv.format(self.cnv_types[info] if info>=20 else "raw")
            rows += [ self.imported_row(urls[0], cnv.title()) ]

        # Extract from playlist files, either passed as text/uri-list or FILE_NAME
        elif urls:
            for fn in [re.sub("^\w+://[^/]*", "", fn) for fn in urls or [data] if re.match("^(scp|file)://(localhost)?/|/", fn)]:
                ext = action.probe_playlist_fn_ext(fn)
                if ext:  # don't import mp3s into stream lists directly
                    cnt = open(fn, "rt").read()
                    probe = action.probe_playlist_content(cnt)
                    if ext == probe:
                        cnv = action.extract_playlist(cnt)
                        urls = cnv.format(probe)
                        rows += [ self.imported_row(urls[0], cnv.title() or os.path.basename(fn)) ]
        
        # Insert and update view
        if rows:
            # Inserting at correct row requires deducing index from dnd `y` position
            streams = cn.streams[cn.current]
            i_pos = (cn.gtk_list.get_path_at_pos(10, y) or [[len(streams) + 1]])[0][0]
            for row in rows:
                streams.insert(i_pos - 1, row)
                i_pos = i_pos + 1
            # Now appending to the liststore directly would be even nicer
            uikit.do(lambda *x: cn.load(cn.current))#, cn.gtk_list.scroll_to_point(0, y))
            if cn.module == "bookmarks":
                cn.save()
            #self.parent.streamedit()
        else:
            self.parent.status("Unsupported station format. Not imported.")


    # Stub row for dragged entries.
    # Which is a workaround for the missing full playlist conversion and literal URL input
    def imported_row(self, url, title=None):
        return {
            "title": title or "",
            "url": url,
            "homepage": "",
            "playling": "",
            "listformat": action.probe_playlist_fn_ext(url) or "href",
            "format": ",".join(re.findall("ogg|mpeg|mp\d+", url)),
            "genre": "copy",
        }