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#
#  This program 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 2
#  of the License, or (at your option) any later version.
#
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#  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 this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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# ##### END GPL LICENSE BLOCK #####

import bpy
import sys, os, re
import http, http.client, http.server, urllib
import subprocess, shutil, time, hashlib

import netrender
import netrender.model
import netrender.slave as slave
import netrender.master as master
from netrender.utils import *

def addFluidFiles(job, path):
    if os.path.exists(path):
        pattern = re.compile("fluidsurface_(final|preview)_([0-9]+)\.(bobj|bvel)\.gz")

        for fluid_file in sorted(os.listdir(path)):
            match = pattern.match(fluid_file)

            if match:
                # fluid frames starts at 0, which explains the +1
                # This is stupid
                current_frame = int(match.groups()[1]) + 1
                job.addFile(path + fluid_file, current_frame, current_frame)

def addPointCache(job, ob, point_cache, default_path):
    if not point_cache.use_disk_cache:
        return


    name = point_cache.name
    if name == "":
        name = "".join(["%02X" % ord(c) for c in ob.name])

    cache_path = bpy.path.abspath(point_cache.filepath) if point_cache.use_external else default_path

    index = "%02i" % point_cache.index

    if os.path.exists(cache_path):
        pattern = re.compile(name + "_([0-9]+)_" + index + "\.bphys")

        cache_files = []

        for cache_file in sorted(os.listdir(cache_path)):
            match = pattern.match(cache_file)

            if match:
                cache_frame = int(match.groups()[0])
                cache_files.append((cache_frame, cache_file))

        cache_files.sort()

        if len(cache_files) == 1:
            cache_frame, cache_file = cache_files[0]
            job.addFile(cache_path + cache_file, cache_frame, cache_frame)
        else:
            for i in range(len(cache_files)):
                current_item = cache_files[i]
                next_item = cache_files[i+1] if i + 1 < len(cache_files) else None
                previous_item = cache_files[i - 1] if i > 0 else None

                current_frame, current_file = current_item

                if  not next_item and not previous_item:
                    job.addFile(cache_path + current_file, current_frame, current_frame)
                elif next_item and not previous_item:
                    next_frame = next_item[0]
                    job.addFile(cache_path + current_file, current_frame, next_frame - 1)
                elif not next_item and previous_item:
                    previous_frame = previous_item[0]
                    job.addFile(cache_path + current_file, previous_frame + 1, current_frame)
                else:
                    next_frame = next_item[0]
                    previous_frame = previous_item[0]
                    job.addFile(cache_path + current_file, previous_frame + 1, next_frame - 1)

def clientSendJob(conn, scene, anim = False):
    netsettings = scene.network_render
    job = netrender.model.RenderJob()

    if anim:
        for f in range(scene.frame_start, scene.frame_end + 1):
            job.addFrame(f)
    else:
        job.addFrame(scene.frame_current)

    filename = bpy.data.filepath
    job.addFile(filename)

    job_name = netsettings.job_name
    path, name = os.path.split(filename)
    if job_name == "[default]":
        job_name = name

    ###########################
    # LIBRARIES
    ###########################
    for lib in bpy.data.libraries:
        file_path = bpy.path.abspath(lib.filepath)
        if os.path.exists(file_path):
            job.addFile(file_path)

    ###########################
    # IMAGES
    ###########################
    for image in bpy.data.images:
        if image.source == "FILE" and not image.packed_file:
            file_path = bpy.path.abspath(image.filepath)
            if os.path.exists(file_path):
                job.addFile(file_path)
                
                tex_path = os.path.splitext(file_path)[0] + ".tex"
                if os.path.exists(tex_path):
                    job.addFile(tex_path)

    ###########################
    # FLUID + POINT CACHE
    ###########################
    root, ext = os.path.splitext(name)
    default_path = path + os.sep + "blendcache_" + root + os.sep # need an API call for that

    for object in bpy.data.objects:
        for modifier in object.modifiers:
            if modifier.type == 'FLUID_SIMULATION' and modifier.settings.type == "DOMAIN":
                addFluidFiles(job, bpy.path.abspath(modifier.settings.path))
            elif modifier.type == "CLOTH":
                addPointCache(job, object, modifier.point_cache, default_path)
            elif modifier.type == "SOFT_BODY":
                addPointCache(job, object, modifier.point_cache, default_path)
            elif modifier.type == "SMOKE" and modifier.smoke_type == "TYPE_DOMAIN":
                addPointCache(job, object, modifier.domain_settings.point_cache_low, default_path)
                if modifier.domain_settings.use_high_resolution:
                    addPointCache(job, object, modifier.domain_settings.point_cache_high, default_path)
            elif modifier.type == "MULTIRES" and modifier.is_external:
                file_path = bpy.path.abspath(modifier.filepath)
                job.addFile(file_path)

        # particles modifier are stupid and don't contain data
        # we have to go through the object property
        for psys in object.particle_systems:
            addPointCache(job, object, psys.point_cache, default_path)

    #print(job.files)

    job.name = job_name
    job.category = netsettings.job_category

    for slave in netrender.blacklist:
        job.blacklist.append(slave.id)

    job.chunks = netsettings.chunks
    job.priority = netsettings.priority

    # try to send path first
    conn.request("POST", "/job", repr(job.serialize()))
    response = conn.getresponse()
    response.read()

    job_id = response.getheader("job-id")

    # if not ACCEPTED (but not processed), send files
    if response.status == http.client.ACCEPTED:
        for rfile in job.files:
            f = open(rfile.filepath, "rb")
            conn.request("PUT", fileURL(job_id, rfile.index), f)
            f.close()
            response = conn.getresponse()
            response.read()

    # server will reply with ACCEPTED until all files are found

    return job_id

def requestResult(conn, job_id, frame):
    conn.request("GET", renderURL(job_id, frame))

class NetworkRenderEngine(bpy.types.RenderEngine):
    bl_idname = 'NET_RENDER'
    bl_label = "Network Render"
    bl_postprocess = False
    def render(self, scene):
        if scene.network_render.mode == "RENDER_CLIENT":
            self.render_client(scene)
        elif scene.network_render.mode == "RENDER_SLAVE":
            self.render_slave(scene)
        elif scene.network_render.mode == "RENDER_MASTER":
            self.render_master(scene)
        else:
            print("UNKNOWN OPERATION MODE")

    def render_master(self, scene):
        netsettings = scene.network_render

        address = "" if netsettings.server_address == "[default]" else netsettings.server_address

        master.runMaster((address, netsettings.server_port), netsettings.use_master_broadcast, netsettings.use_master_clear, netsettings.path, self.update_stats, self.test_break)


    def render_slave(self, scene):
        slave.render_slave(self, scene.network_render, scene.render.threads)

    def render_client(self, scene):
        netsettings = scene.network_render
        self.update_stats("", "Network render client initiation")


        conn = clientConnection(netsettings.server_address, netsettings.server_port)

        if conn:
            # Sending file

            self.update_stats("", "Network render exporting")

            new_job = False

            job_id = netsettings.job_id

            # reading back result

            self.update_stats("", "Network render waiting for results")

            requestResult(conn, job_id, scene.frame_current)
            response = conn.getresponse()
            response.read()

            if response.status == http.client.NO_CONTENT:
                new_job = True
                netsettings.job_id = clientSendJob(conn, scene)
                job_id = netsettings.job_id

                requestResult(conn, job_id, scene.frame_current)
                response = conn.getresponse()
                response.read()

            while response.status == http.client.ACCEPTED and not self.test_break():
                time.sleep(1)
                requestResult(conn, job_id, scene.frame_current)
                response = conn.getresponse()
                response.read()

            # cancel new jobs (animate on network) on break
            if self.test_break() and new_job:
                conn.request("POST", cancelURL(job_id))
                response = conn.getresponse()
                response.read()
                print( response.status, response.reason )
                netsettings.job_id = 0

            if response.status != http.client.OK:
                conn.close()
                return

            r = scene.render
            x= int(r.resolution_x*r.resolution_percentage*0.01)
            y= int(r.resolution_y*r.resolution_percentage*0.01)

            f = open(os.path.join(netsettings.path, "output.exr"), "wb")
            buf = response.read(1024)

            while buf:
                f.write(buf)
                buf = response.read(1024)

            f.close()

            result = self.begin_result(0, 0, x, y)
            result.load_from_file(os.path.join(netsettings.path, "output.exr"))
            self.end_result(result)

            conn.close()

def compatible(module):
    module = __import__(module)
    for subclass in module.__dict__.values():
        try:		subclass.COMPAT_ENGINES.add('NET_RENDER')
        except:	pass
    del module

#compatible("properties_render")
compatible("properties_world")
compatible("properties_material")
compatible("properties_data_mesh")
compatible("properties_data_camera")
compatible("properties_texture")
