# Evaluate with Librispeech test-clean, ~3s prompt to generate 4-10s audio (the way of valle/voicebox evaluation)

import sys, os
sys.path.append(os.getcwd())

import multiprocessing as mp
import numpy as np

from model.utils import (
    get_librispeech_test,
    run_asr_wer,
    run_sim,
)


eval_task = "wer"  # sim | wer
lang = "en"
metalst = "data/librispeech_pc_test_clean_cross_sentence.lst"
librispeech_test_clean_path = "<SOME_PATH>/LibriSpeech/test-clean"  # test-clean path
gen_wav_dir = "PATH_TO_GENERATED"  # generated wavs

gpus = [0,1,2,3,4,5,6,7]
test_set = get_librispeech_test(metalst, gen_wav_dir, gpus, librispeech_test_clean_path)

## In LibriSpeech, some speakers utilized varying voice characteristics for different characters in the book,
## leading to a low similarity for the ground truth in some cases.
# test_set = get_librispeech_test(metalst, gen_wav_dir, gpus, librispeech_test_clean_path, eval_ground_truth = True)  # eval ground truth

local = False
if local:  # use local custom checkpoint dir
    asr_ckpt_dir = "../checkpoints/Systran/faster-whisper-large-v3"
else:
    asr_ckpt_dir = ""  # auto download to cache dir

wavlm_ckpt_dir = "../checkpoints/UniSpeech/wavlm_large_finetune.pth"


# --------------------------- WER ---------------------------

if eval_task == "wer":
    wers = []

    with mp.Pool(processes=len(gpus)) as pool:
        args = [(rank, lang, sub_test_set, asr_ckpt_dir) for (rank, sub_test_set) in test_set]
        results = pool.map(run_asr_wer, args)
        for wers_ in results:
            wers.extend(wers_)

    wer = round(np.mean(wers)*100, 3)
    print(f"\nTotal {len(wers)} samples")
    print(f"WER      : {wer}%")


# --------------------------- SIM ---------------------------

if eval_task == "sim":
    sim_list = []

    with mp.Pool(processes=len(gpus)) as pool:
        args = [(rank, sub_test_set, wavlm_ckpt_dir) for (rank, sub_test_set) in test_set]
        results = pool.map(run_sim, args)
        for sim_ in results:
            sim_list.extend(sim_)

    sim = round(sum(sim_list)/len(sim_list), 3)
    print(f"\nTotal {len(sim_list)} samples")
    print(f"SIM      : {sim}")