"""
    Flowblade Movie Editor is a nonlinear video editor.
    Copyright 2012 Janne Liljeblad.

    This file is part of Flowblade Movie Editor <http://code.google.com/p/flowblade>.

    Flowblade Movie Editor is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Flowblade Movie Editor is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Flowblade Movie Editor.  If not, see <http://www.gnu.org/licenses/>.
"""

from gi.repository import Gtk
import os
from xml.dom import minidom
from math import floor
try:
    import mlt7 as mlt
except:
    import mlt
import time
import hashlib
import re
import shutil

import appconsts
import atomicfile
import dialogs
import dialogutils
from editorstate import PLAYER
from editorstate import PROJECT
from editorstate import current_sequence
import exportardour
import gui
import guiutils
import renderconsumer
import utils
import userfolders


REEL_NAME_HASH_8_NUMBER = 1
REEL_NAME_FILE_NAME_START = 2

_xml_render_player = None

_screenshot_img = None
_img_types = ["png", "bmp", "targa","tiff"]
_img_extensions = ["png", "bmp", "tga","tif"]

_ardour_export_sample_rate = exportardour.DEFAULT_SAMPLE_RATE

####---------------MLT--------------####    
def MELT_XML_export():
    dialogs.export_xml_dialog(_export_melt_xml_dialog_callback, PROJECT().name)

def _export_melt_xml_dialog_callback(dialog, response_id):
    if response_id == Gtk.ResponseType.ACCEPT:
        filenames = dialog.get_filenames()
        save_path = filenames[0]

        _xml_render_player = renderconsumer.XMLRenderPlayer(  save_path,
                                                              _xml_render_done,
                                                              None,
                                                              PROJECT().c_seq,
                                                              PROJECT(),
                                                              PLAYER())
        _xml_render_player.start()
        
        dialog.destroy()
    else:
        dialog.destroy()

def _xml_render_done(data):
    global _xml_render_player
    _xml_render_player = None



####---------------EDL--------------####
def EDL_export():
    dialogs.export_edl_dialog(_export_edl_dialog_callback, gui.editor_window.window, PROJECT().name)

def _export_edl_dialog_callback(dialog, response_id):
    if response_id == Gtk.ResponseType.ACCEPT:
        filenames = dialog.get_filenames()
        edl_path = filenames[0]
        
        _xml_render_player = renderconsumer.XMLRenderPlayer(get_edl_temp_xml_path(),
                                                            _edl_xml_render_done,
                                                            edl_path,
                                                            PROJECT().c_seq,
                                                            PROJECT(),
                                                            PLAYER())
        _xml_render_player.start()

        dialog.destroy()
    else:
        dialog.destroy()

def _edl_xml_render_done(data):
    edl_path  = data
    mlt_parse = MLTXMLToEDLParse(get_edl_temp_xml_path(), current_sequence())
    edl_contents = mlt_parse.create_edl()
    with atomicfile.AtomicFileWriter(edl_path, "w") as afw:
        f = afw.get_file()
        f.write(edl_contents)

def get_edl_temp_xml_path():
    return userfolders.get_cache_dir() + "edl_temp_xml.xml"


class MLTXMLToEDLParse:
    def __init__(self, xmlfile, current_sequence):
        self.xmldoc = minidom.parse(xmlfile)
        self.current_sequence = current_sequence

        self.producers = {} # producer id -> producer_data
        self.resource_to_reel_name = {}
        self.reel_name_to_resource = {}
        
        self.reel_name_type = REEL_NAME_FILE_NAME_START
        self.from_clip_comment = True
        self.use_drop_frames = False

    def get_project_profile(self):
        profile_dict = {}
        profile = self.xmldoc.getElementsByTagName("profile")
        key_list = list(profile.item(0).attributes.keys())
        for a in key_list:
            profile_dict[a] = profile.item(0).attributes[a].value
        return profile_dict
    
    def get_tracks(self):
        tracks = []
        t = self.xmldoc.getElementsByTagName("track")
        for track in t:
            tracks.append(track.attributes["producer"].value) 
        return tuple(tracks)
    
    def get_playlists(self):
        playlist_list = []
        playlists = self.xmldoc.getElementsByTagName("playlist")
        eid = 0
        for p in playlists:
            
            track_id_attr_value = p.attributes["id"].value

            # Don't empty, black or hidden tracks
            if track_id_attr_value == "playlist0":
                continue
            
            if len(p.getElementsByTagName("entry")) < 1:
                continue
                
            # plist contains id and events list data
            plist = {}
            plist["pl_id"] = track_id_attr_value
 
            # Set track type info
            track_index = int(track_id_attr_value.lstrip("playlist"))
            track_object =  self.current_sequence.tracks[track_index]
            plist["src_channel"] =  "AA/V" 
            if track_object.type == appconsts.AUDIO:
                plist["src_channel"] = "AA"
                        
            # Create events list
            event_list = []
            event_nodes = p.childNodes
            events = []
            for i in range(0, event_nodes.length):
                # Get edit event
                event_node = event_nodes.item(i)
                
                # Create event  and give it id
                event = {}
                event["eid"] = eid
                eid = eid + 1
                
                # Set event data
                if event_node.localName == "entry":# or  event.localName == "blank":
                    event["type"] = event_node.localName
                    event["producer"] = event_node.attributes["producer"].value
                    event["inTime"] = event_node.attributes["in"].value
                    event["outTime"] = event_node.attributes["out"].value
                    event_list.append(event)
                elif event_node.localName == "blank":
                    event["type"] = event_node.localName
                    event["length"] = event_node.attributes["length"].value
                    event_list.append(event)

            plist["events_list"] = event_list
            
            # Add to playlists list
            playlist_list.append(plist)
            
        return tuple(playlist_list)

    def create_producers_dict(self):
        producer_nodes = self.xmldoc.getElementsByTagName("producer")
        for p in producer_nodes:
            producer_data = {}
            producer_data["id"] = p.attributes["id"].value
            producer_data["inTime"] = p.attributes["in"].value
            producer_data["outTime"] = p.attributes["out"].value
            properties = p.getElementsByTagName("property")
            for props in properties:
                producer_data[props.attributes["name"].value.replace(".","_")] = props.firstChild.data
                
            self.producers[producer_data["id"]] = producer_data
    
    def link_resources(self):
        for producer_id, producer_data in self.producers.items():

            producer_resource = producer_data["resource"]
            reel_name = self.get_reel_name(producer_resource)

            # If two reel names are same but point to different resources,
            # use md5 hash as reel name for the new resource.
            # This happens when two resources have same 8 first letters in file name.
            if reel_name in self.reel_name_to_resource:
                existing_resource = self.reel_name_to_resource[reel_name]

                if existing_resource != producer_resource:
                    reel_name = hashlib.md5(producer_resource.encode('utf-8')).hexdigest()[:8]
                    

            self.resource_to_reel_name[producer_resource] = reel_name
            self.reel_name_to_resource[reel_name] = producer_resource

    def get_reel_name(self, resource):
        if self.reel_name_type == REEL_NAME_HASH_8_NUMBER:
            return "{0:08d}".format(hashlib.md5(resource.encode('utf-8')).hexdigest())
        else:
            file_name = resource.split("/")[-1]
            file_name_no_ext = file_name.split(".")[0]
            file_name_no_ext = re.sub('[^0-9a-zA-Z]+', 'X', file_name_no_ext)
            file_name_len = len(file_name_no_ext)
            if file_name_len >= 8:
                reel_name = file_name_no_ext[0:8]
            else:
                reel_name = file_name_no_ext  + "XXXXXXXX"[0:8 - file_name_len]

            return reel_name

    def get_producer_media_data(self, producer_id):
        producer_data = self.producers[producer_id]
        producer_resource = producer_data["resource"]
        reel_name = self.resource_to_reel_name[producer_resource]
        
        return reel_name, producer_resource

    def create_edl(self):

        self.create_producers_dict()
        self.link_resources()

        playlists = self.get_playlists()

        edl_event_count = 1 # incr. event index

        str_list = []
        for plist in playlists:
            prog_in = 0
            prog_out = 0
            
            str_list.append("\n === " + plist["pl_id"] + " === \n\n")
            
            event_list = plist["events_list"]
            
            src_channel = plist["src_channel"] 
                    
            for event in event_list:
                
                if event["type"] == "entry":
                    src_in = int(event["inTime"])
                    src_out = int(event["outTime"])
                    src_len = src_out - src_in + 1
                     
                    prog_out = prog_in + src_len
                    
                    producer_id = event["producer"]
                    reel_name, resource = self.get_producer_media_data(producer_id)
                elif event["type"] == "blank":

                    src_in = 0
                    src_out = int(event["length"])
                    src_len = int(event["length"])
                    prog_out = prog_in + int(event["length"])

                    reel_name = "BL      "
                    resource = None

                src_transition = "C"
                
                str_list.append("{0:03d}".format(edl_event_count))
                str_list.append("  ")
                str_list.append(reel_name)
                str_list.append(" ")
                str_list.append(src_channel)            
                str_list.append("  ")
                str_list.append(src_transition)
                str_list.append("        ")
                str_list.append(self.frames_to_tc(src_in))
                str_list.append(" ")
                str_list.append(self.frames_to_tc(src_out + 1))
                str_list.append(" ")
                str_list.append(self.frames_to_tc(prog_in))
                str_list.append(" ")
                str_list.append(self.frames_to_tc(prog_out))
                str_list.append("\n")

                if self.from_clip_comment == True and resource != None:
                    str_list.append("* FROM CLIP NAME: " + resource.split("/")[-1] + "\n")
                    
                edl_event_count += 1
   
                prog_in += src_len

        return ''.join(str_list).strip("\n")

    def frames_to_tc(self, frame):
        if self.use_drop_frames == True:
            return self.frames_to_DF(frame)
        else:
            return utils.get_tc_string(frame)

    def frames_to_DF(self, framenumber):
        """
            This method adapted from C++ code called "timecode" by Jason Wood.
            begin: Wed Dec 17 2003
            copyright: (C) 2003 by Jason Wood
            email: jasonwood@blueyonder.co.uk 
            Framerate should be 29.97, 59.94, or 23.976, otherwise the calculations will be off.
        """
        projectMeta = self.get_project_profile()
        framerate = float(projectMeta["frame_rate_num"]) / float(projectMeta["frame_rate_den"])
        
        # Number of frames to drop on the minute marks is the nearest integer to 6% of the framerate
        dropFrames = round(framerate * 0.066666) 
        # Number of frames in an hour
        framesPerHour = round(framerate * 60 * 60) 
        # Number of frames in a day - timecode rolls over after 24 hours
        framesPerDay = framesPerHour * 24 
        # Number of frames per ten minutes
        framesPer10Minutes = round(framerate * 60 * 10) 
        # Number of frames per minute is the round of the framerate * 60 minus the number of dropped frames
        framesPerMinute = (round(framerate) * 60) - dropFrames 
        
        if (framenumber < 0): # For negative time, add 24 hours.
            framenumber = framesPerDay + framenumber

        # If framenumber is greater than 24 hrs, next operation will rollover clock
        # % is the modulus operator, which returns a remainder. a % b = the remainder of a/b

        framenumber = framenumber % framesPerDay 
        d = floor(framenumber / framesPer10Minutes)
        m = framenumber % framesPer10Minutes

        if (m > 1):
            framenumber=framenumber + (dropFrames * 9 * d) + dropFrames * floor((m-dropFrames) / framesPerMinute)
        else:
            framenumber = framenumber + dropFrames * 9 * d

        frRound = round(framerate)
        frames = framenumber % frRound
        seconds = floor(framenumber / frRound) % 60
        minutes = floor(floor(framenumber / frRound) / 60) % 60
        hours = floor(floor(floor(framenumber / frRound) / 60) / 60)

        tc = "%d:%02d:%02d;%02d" % (hours, minutes, seconds, frames)
        return tc
        

####---------------Screenshot--------------####
def screenshot_export():
    length = current_sequence().tractor.get_length()
    if length < 2:
        dialogutils.info_message(_("Sequence is too short"), _("Sequence needs to be at least 2 frames long to allow frame export."), None)
        return
    
    frame = PLAYER().current_frame()

    # Can't get last frame to render easily, so just force range.
    if frame > length - 2:
        frame = length - 2

    render_screen_shot(frame, get_displayed_image_render_path(), "png")
    export_screenshot_dialog(_export_screenshot_dialog_callback, frame,
                             gui.editor_window.window, PROJECT().name)
    PLAYER().seek_frame(frame)

def _export_screenshot_dialog_callback(dialog, response_id, data):
    file_name, out_folder, file_type_combo, frame = data
    if response_id == Gtk.ResponseType.YES:
        vcodec = _img_types[file_type_combo.get_active()]
        ext = _img_extensions[file_type_combo.get_active()]
        render_path = userfolders.get_hidden_screenshot_dir_path() + "screenshot_%01d." + ext
        rendered_file_path = userfolders.get_hidden_screenshot_dir_path() + "screenshot_1." + ext 
        out_file_path = out_folder.get_filename()+ "/" + file_name.get_text() + "." + ext
        dialog.destroy()

        render_screen_shot(frame, render_path, vcodec)
        shutil.copyfile(rendered_file_path, out_file_path)
    else:
        dialog.destroy()
    
    purge_screenshots()
    PLAYER().seek_frame(frame)

def get_displayed_image_render_path():
    return userfolders.get_hidden_screenshot_dir_path() + "screenshot_%01d.png"

def get_displayed_image_path():
    return userfolders.get_hidden_screenshot_dir_path() + "screenshot_1.png"

def render_screen_shot(frame, render_path, vcodec):
    producer = current_sequence().tractor   
    
    consumer = mlt.Consumer(PROJECT().profile, "avformat", str(render_path))
    consumer.set("real_time", -1)
    consumer.set("rescale", "bicubic")
    consumer.set("vcodec", str(vcodec))
    
    renderer = renderconsumer.FileRenderPlayer(None, producer, consumer, frame, frame + 1)
    renderer.wait_for_producer_end_stop = False
    renderer.consumer_pos_stop_add = 2
    renderer.start()

    while renderer.has_started_running == False:
        time.sleep(0.05)

    while renderer.stopped == False:
        time.sleep(0.05)

def export_screenshot_dialog(callback, frame, parent_window, project_name):
    cancel_str = _("Cancel")
    ok_str = _("Export Image")
    dialog = Gtk.Dialog(_("Export Frame Image"),
                        parent_window,
                        Gtk.DialogFlags.MODAL | Gtk.DialogFlags.DESTROY_WITH_PARENT,
                        (cancel_str, Gtk.ResponseType.CANCEL,
                        ok_str, Gtk.ResponseType.YES))

    global _screenshot_img
    _screenshot_img = guiutils.get_gtk_image_from_file(get_displayed_image_path(), 300)

    frame_frame = guiutils.get_named_frame_with_vbox(None, [_screenshot_img])
    
    INPUT_LABELS_WITDH = 320
    project_name = project_name.strip(".flb")

    file_name = Gtk.Entry()
    file_name.set_text(project_name)

    extension_label = Gtk.Label(label=".png")
    extension_label.set_size_request(35, 20)

    name_pack = Gtk.HBox(False, 4)
    name_pack.pack_start(file_name, True, True, 0)
    name_pack.pack_start(extension_label, False, False, 0)

    name_row = guiutils.get_two_column_box(Gtk.Label(label=_("Export file name:")), name_pack, INPUT_LABELS_WITDH)
 
    out_folder = Gtk.FileChooserButton(_("Select target folder"))
    out_folder.set_action(Gtk.FileChooserAction.SELECT_FOLDER)
    out_folder.set_current_folder(os.path.expanduser("~") + "/")
    
    folder_row = guiutils.get_two_column_box(Gtk.Label(label=_("Export folder:")), out_folder, INPUT_LABELS_WITDH)

    file_type_combo = Gtk.ComboBoxText()
    for img in _img_types:
        file_type_combo.append_text(img)
    file_type_combo.set_active(0)
    file_type_combo.connect("changed", _file_type_changed, extension_label)
    file_type_row = guiutils.get_two_column_box(Gtk.Label(label=_("Image type:")), file_type_combo, INPUT_LABELS_WITDH)
    
    file_frame = guiutils.get_named_frame_with_vbox(None, [file_type_row, name_row, folder_row])
    
    vbox = Gtk.VBox(False, 2)
    vbox.pack_start(frame_frame, False, False, 0)
    vbox.pack_start(guiutils.pad_label(12, 12), False, False, 0)
    vbox.pack_start(file_frame, False, False, 0)

    alignment = guiutils.set_margins(vbox, 12, 12, 12, 12)

    dialog.vbox.pack_start(alignment, True, True, 0)
    dialogutils.set_outer_margins(dialog.vbox)
    dialogutils.default_behaviour(dialog)
    dialog.connect('response', callback, (file_name, out_folder, file_type_combo, frame)) #(file_name, out_folder, track_select_combo, cascade_check, op_combo, audio_track_select_combo))
    dialog.show_all()

def _file_type_changed(combo, label):
    label.set_text("." + _img_extensions[combo.get_active()])

def purge_screenshots():
    d = userfolders.get_hidden_screenshot_dir_path()
    for f in os.listdir(d):
        os.remove(os.path.join(d, f))



####---------------Ardour Session--------------####
def ardour_export():
    print ("Ardour export...")
    dialogs.export_ardour_session_folder_select(_ardour_export_dialog_callback)
    
    
def _ardour_export_dialog_callback(dialog, response_id, session_folder, sample_rate_combo):
    if response_id != Gtk.ResponseType.ACCEPT:
        dialog.destroy()
        return

    # set ardour export sample rate
    global _ardour_export_sample_rate
    sample_rate_index = sample_rate_combo.get_active()
    _ardour_export_sample_rate = exportardour.SAMPLE_RATES[sample_rate_index][1]

    folder_path = session_folder.get_filenames()[0]
    if not (os.listdir(folder_path) == []):
        dialog.destroy()
        primary_txt = _("Selected folder contains files")
        secondary_txt = _("When exporting audio to Ardour, the selected folder\nhas to be empty.")
        dialogutils.info_message(primary_txt, secondary_txt, gui.editor_window.window)
        return

    # name = name_entry.get_text()
    dialog.destroy()

    xml_save_path = userfolders.get_cache_dir() + "ardour_export.xml"
    
    global _xml_render_player
    _xml_render_player = renderconsumer.XMLRenderPlayer(  xml_save_path,
                                                          _ardour_xml_render_done,
                                                          None,
                                                          PROJECT().c_seq,
                                                          PROJECT(),
                                                          PLAYER())

    _xml_render_player.ardour_session_folder = folder_path
    _xml_render_player.start()

def _ardour_xml_render_done(data):
    global _xml_render_player
    global _ardour_export_sample_rate

    adour_session_folder = _xml_render_player.ardour_session_folder
    temp_xml = _xml_render_player.file_name
    
    _xml_render_player = None
    
    exportardour.use_existing_basedir = True
    exportardour.launch_export_ardour_session_from_flowblade(temp_xml,
                                                             adour_session_folder,
                                                             sample_rate=_ardour_export_sample_rate)

    print ("Ardour export done.")
