from audio_separator.separator import Separator
from flask import Flask, request, jsonify, send_file
import requests
import os
import uuid
from pathlib import Path
import threading
import time

separator = Separator(output_dir="/tmp")

roformer_models = {
        'BS-Roformer-Viperx-1297.ckpt': 'model_bs_roformer_ep_317_sdr_12.9755.ckpt',
        'BS-Roformer-Viperx-1296.ckpt': 'model_bs_roformer_ep_368_sdr_12.9628.ckpt',
        'BS-Roformer-Viperx-1053.ckpt': 'model_bs_roformer_ep_937_sdr_10.5309.ckpt',
        'Mel-Roformer-Viperx-1143.ckpt': 'model_mel_band_roformer_ep_3005_sdr_11.4360.ckpt'
}

mdx23c_models = [
    'MDX23C_D1581.ckpt',
    'MDX23C-8KFFT-InstVoc_HQ.ckpt',
    'MDX23C-8KFFT-InstVoc_HQ_2.ckpt',
]

mdxnet_models = [
    'UVR-MDX-NET-Inst_full_292.onnx',
    'UVR-MDX-NET_Inst_187_beta.onnx',
    'UVR-MDX-NET_Inst_82_beta.onnx',
    'UVR-MDX-NET_Inst_90_beta.onnx',
    'UVR-MDX-NET_Main_340.onnx',
    'UVR-MDX-NET_Main_390.onnx',
    'UVR-MDX-NET_Main_406.onnx',
    'UVR-MDX-NET_Main_427.onnx',
    'UVR-MDX-NET_Main_438.onnx',
    'UVR-MDX-NET-Inst_HQ_1.onnx',
    'UVR-MDX-NET-Inst_HQ_2.onnx',
    'UVR-MDX-NET-Inst_HQ_3.onnx',
    'UVR-MDX-NET-Inst_HQ_4.onnx',
    'UVR_MDXNET_Main.onnx',
    'UVR-MDX-NET-Inst_Main.onnx',
    'UVR_MDXNET_1_9703.onnx',
    'UVR_MDXNET_2_9682.onnx',
    'UVR_MDXNET_3_9662.onnx',
    'UVR-MDX-NET-Inst_1.onnx',
    'UVR-MDX-NET-Inst_2.onnx',
    'UVR-MDX-NET-Inst_3.onnx',
    'UVR_MDXNET_KARA.onnx',
    'UVR_MDXNET_KARA_2.onnx',
    'UVR_MDXNET_9482.onnx',
    'UVR-MDX-NET-Voc_FT.onnx',
    'Kim_Vocal_1.onnx',
    'Kim_Vocal_2.onnx',
    'Kim_Inst.onnx',
    'Reverb_HQ_By_FoxJoy.onnx',
    'UVR-MDX-NET_Crowd_HQ_1.onnx',
    'kuielab_a_vocals.onnx',
    'kuielab_a_other.onnx',
    'kuielab_a_bass.onnx',
    'kuielab_a_drums.onnx',
    'kuielab_b_vocals.onnx',
    'kuielab_b_other.onnx',
    'kuielab_b_bass.onnx',
    'kuielab_b_drums.onnx',
]

vrarch_models = [
    '1_HP-UVR.pth',
    '2_HP-UVR.pth',
    '3_HP-Vocal-UVR.pth',
    '4_HP-Vocal-UVR.pth',
    '5_HP-Karaoke-UVR.pth',
    '6_HP-Karaoke-UVR.pth',
    '7_HP2-UVR.pth',
    '8_HP2-UVR.pth',
    '9_HP2-UVR.pth',
    '10_SP-UVR-2B-32000-1.pth',
    '11_SP-UVR-2B-32000-2.pth',
    '12_SP-UVR-3B-44100.pth',
    '13_SP-UVR-4B-44100-1.pth',
    '14_SP-UVR-4B-44100-2.pth',
    '15_SP-UVR-MID-44100-1.pth',
    '16_SP-UVR-MID-44100-2.pth',
    '17_HP-Wind_Inst-UVR.pth',
    'UVR-De-Echo-Aggressive.pth',
    'UVR-De-Echo-Normal.pth',
    'UVR-DeEcho-DeReverb.pth',
    'UVR-DeNoise-Lite.pth',
    'UVR-DeNoise.pth',
    'UVR-BVE-4B_SN-44100-1.pth',
    'MGM_HIGHEND_v4.pth',
    'MGM_LOWEND_A_v4.pth',
    'MGM_LOWEND_B_v4.pth',
    'MGM_MAIN_v4.pth',
]

demucs_models = [
    'htdemucs_ft.yaml',
    'htdemucs.yaml',
    'hdemucs_mmi.yaml',
]

def roformer_separator(audio, checkpoint_name):
    full_checkpoint_name = roformer_models[checkpoint_name]
    separator.load_model(full_checkpoint_name)
    output_files = separator.separate(audio)
    stem1 = output_files[0]
    stem2 = output_files[1]
    return stem1, stem2

def mdx_vr_separator(audio, checkpoint_name):
    separator.load_model(checkpoint_name)
    output_files = separator.separate(audio)
    stem1 = output_files[0]
    stem2 = output_files[1]
    return stem1, stem2

def demucs_separator(audio, checkpoint_name):
    separator.load_model(checkpoint_name)
    output_files = separator.separate(audio)
    stem1 = output_files[0]
    stem2 = output_files[1]
    stem3 = output_files[2]
    stem4 = output_files[3]
    return stem1, stem2, stem3, stem4

# 任务队列和状态存储
tasks = {}

def process_audio_separation(task_id, mp3_url):
    try:
        # 下载MP3文件到本地
        response = requests.get(mp3_url)
        if response.status_code != 200:
            raise Exception("无效的 URL")
        mp3_filename = mp3_url.split('/')[-1]
        with open("/tmp/" + mp3_filename, 'wb') as f:
            f.write(response.content)

        # 执行音频分离操作
        mdxnet_stem1, mdxnet_stem2 = mdx_vr_separator("/tmp/" + mp3_filename, 'UVR-MDX-NET-Inst_HQ_3.onnx')

        # 生成分离后的文件名
        vocals_filename = f"{os.path.splitext(mp3_filename)[0]}_vocals.wav"
        no_vocals_filename = f"{os.path.splitext(mp3_filename)[0]}_no_vocals.wav"

        # 保存结果
        with open(vocals_filename, 'wb') as file:
            file.write(mdxnet_stem1)

        with open(no_vocals_filename, 'wb') as file:
            file.write(mdxnet_stem2)

        # 提供文件的永久直链
        vocals_url = f"/download/{os.path.basename(vocals_filename)}"
        no_vocals_url = f"/download/{os.path.basename(no_vocals_filename)}"

        # 更新任务状态
        tasks[task_id] = {
            "status": "completed",
            "vocals_url": vocals_url,
            "no_vocals_url": no_vocals_url
        }
    except Exception as e:
        tasks[task_id] = {
            "status": "error",
            "message": str(e)
        }

app = Flask(__name__)

@app.route('/', methods=['GET'])
def hello():
    return "Hello! This is an api server, and it is running successfully. For usage, please contact the person who hosted this api server."

@app.route('/api/audio_separation', methods=['GET'])
def audio_separation():
    mp3_url = request.args.get('url')
    if not mp3_url:
        return jsonify({"error": "URL parameter is required"}), 400

    task_id = str(uuid.uuid4())
    tasks[task_id] = {"status": "processing"}

    # 异步执行任务
    threading.Thread(target=process_audio_separation, args=(task_id, mp3_url)).start()

    return jsonify({"task_id": task_id}), 202

@app.route('/api/tasks/<task_id>', methods=['GET'])
def get_task_status(task_id):
    task = tasks.get(task_id)
    if task:
        return jsonify(task)
    else:
        return jsonify({"error": "Task not found"}), 404

@app.route('/download/<filename>', methods=['GET'])
def download(filename):
    return send_file("/tmp/" + filename, as_attachment=True)

if __name__ == '__main__':
    app.run(debug=False)