#!/usr/bin/python3
import os
from render_kdenlive import KDEnliveProject, _CACHE
import subprocess

def generate_sax_mix(root):
    os.chdir(root)


root = os.path.abspath(".")
project = KDEnliveProject(root)

long_wav = "Soon_Kim_Long_Reverb_Only2.wav"
nois_wav = "Soon_Kim_Noise.wav"
reverb_wav = "Soon_Kim_Short_Reverb_Mix2.wav"
'''
i = item.models.Item.objects.get(data__title='Soon_Kim_Long_Reverb_Only2')
i.files.all()[0].data.path
'/srv/pandora/data/media/6b/44/16/3f2905e886/data.wav'

i = item.models.Item.objects.get(data__title='Soon_Kim_Short_Reverb_Mix2')
i.files.all()[0].data.path
'/srv/pandora/data/media/ee/e0/04/d4ab42c3de/data.wav'

i = item.models.Item.objects.get(data__title='Soon_Kim_Noise')
i.files.all()[0].data.path
'/srv/pandora/data/media/84/88/87/d2fb2e2dc2/data.wav'
'''


long = {
    "src": long_wav,
    "duration": 3600.0,
    "filter": {
        "volume": "-4"
    },
}
noise = {
    "src": nois_wav,
    "duration": 3600.0,
    "filter": {
        "volume": "2"
    },
}

project.append_clip('A1', long)
project.append_clip('A2', noise)
path = os.path.join(root, "sax-mix.kdenlive")
with open(path, 'w') as fd:
    fd.write(project.to_xml())

cmds = []
cmds.append([
    "melt", "sax-mix.kdenlive", '-quiet', '-consumer', 'avformat:sax-mix.wav'
])
cmds.append([
    "ffmpeg", "-y",
    "-nostats", "-loglevel", "error",
    "-f", "lavfi", "-i", "anullsrc=r=48000:cl=mono", "-t", "3600", "silence.wav"
])

for src, out1, out2 in (
    (reverb_wav, "fl.wav", "fr.wav"),
    ("sax-mix.wav", "bl.wav", "br.wav"),
):
    cmds.append([
        "ffmpeg", "-y",
        "-nostats", "-loglevel", "error",
        "-i", src,
        "-filter_complex",
        "[0:0]pan=1|c0=c0[left]; [0:0]pan=1|c0=c1[right]",
        "-map", "[left]", out1,
        "-map", "[right]", out2,
    ])

cmds.append([
    "ffmpeg", "-y",
    "-nostats", "-loglevel", "error",
    "-i", "fl.wav",
    "-i", "fr.wav",
    "-i", "silence.wav",
    "-i", "silence.wav",
    "-i", "bl.wav",
    "-i", "br.wav",
    "-filter_complex", "[0:a][1:a][2:a][3:a][4:a][5:a]amerge=inputs=6[a]",
    "-map", "[a]",
    "-ar", "48000",
    "-c:a", "aac", "Saxophone-5.1.mp4"
])
for cmd in cmds:
    print(" ".join([str(x) for x in cmd]))
    subprocess.call(cmd)