import numpy as np
import csv

sample_rate = 32000
clip_samples = sample_rate * 10     # Audio clips are 10-second

# Load label
with open('./audio_detection/audio_infer/metadata/class_labels_indices.csv', 'r') as f:
    reader = csv.reader(f, delimiter=',')
    lines = list(reader)

labels = []
ids = []    # Each label has a unique id such as "/m/068hy"
for i1 in range(1, len(lines)):
    id = lines[i1][1]
    label = lines[i1][2]
    ids.append(id)
    labels.append(label)

classes_num = len(labels)

lb_to_ix = {label : i for i, label in enumerate(labels)}
ix_to_lb = {i : label for i, label in enumerate(labels)}

id_to_ix = {id : i for i, id in enumerate(ids)}
ix_to_id = {i : id for i, id in enumerate(ids)}

full_samples_per_class = np.array([
        937432,  16344,   7822,  10271,   2043,  14420,    733,   1511,
         1258,    424,   1751,    704,    369,    590,   1063,   1375,
         5026,    743,    853,   1648,    714,   1497,   1251,   2139,
         1093,    133,    224,  39469,   6423,    407,   1559,   4546,
         6826,   7464,   2468,    549,   4063,    334,    587,    238,
         1766,    691,    114,   2153,    236,    209,    421,    740,
          269,    959,    137,   4192,    485,   1515,    655,    274,
           69,    157,   1128,    807,   1022,    346,     98,    680,
          890,    352,   4169,   2061,   1753,   9883,   1339,    708,
        37857,  18504,  12864,   2475,   2182,    757,   3624,    677,
         1683,   3583,    444,   1780,   2364,    409,   4060,   3097,
         3143,    502,    723,    600,    230,    852,   1498,   1865,
         1879,   2429,   5498,   5430,   2139,   1761,   1051,    831,
         2401,   2258,   1672,   1711,    987,    646,    794,  25061,
         5792,   4256,     96,   8126,   2740,    752,    513,    554,
          106,    254,   1592,    556,    331,    615,   2841,    737,
          265,   1349,    358,   1731,   1115,    295,   1070,    972,
          174, 937780, 112337,  42509,  49200,  11415,   6092,  13851,
         2665,   1678,  13344,   2329,   1415,   2244,   1099,   5024,
         9872,  10948,   4409,   2732,   1211,   1289,   4807,   5136,
         1867,  16134,  14519,   3086,  19261,   6499,   4273,   2790,
         8820,   1228,   1575,   4420,   3685,   2019,    664,    324,
          513,    411,    436,   2997,   5162,   3806,   1389,    899,
         8088,   7004,   1105,   3633,   2621,   9753,   1082,  26854,
         3415,   4991,   2129,   5546,   4489,   2850,   1977,   1908,
         1719,   1106,   1049,    152,    136,    802,    488,    592,
         2081,   2712,   1665,   1128,    250,    544,    789,   2715,
         8063,   7056,   2267,   8034,   6092,   3815,   1833,   3277,
         8813,   2111,   4662,   2678,   2954,   5227,   1472,   2591,
         3714,   1974,   1795,   4680,   3751,   6585,   2109,  36617,
         6083,  16264,  17351,   3449,   5034,   3931,   2599,   4134,
         3892,   2334,   2211,   4516,   2766,   2862,   3422,   1788,
         2544,   2403,   2892,   4042,   3460,   1516,   1972,   1563,
         1579,   2776,   1647,   4535,   3921,   1261,   6074,   2922,
         3068,   1948,   4407,    712,   1294,   1019,   1572,   3764,
         5218,    975,   1539,   6376,   1606,   6091,   1138,   1169,
         7925,   3136,   1108,   2677,   2680,   1383,   3144,   2653,
         1986,   1800,   1308,   1344, 122231,  12977,   2552,   2678,
         7824,    768,   8587,  39503,   3474,    661,    430,    193,
         1405,   1442,   3588,   6280,  10515,    785,    710,    305,
          206,   4990,   5329,   3398,   1771,   3022,   6907,   1523,
         8588,  12203,    666,   2113,   7916,    434,   1636,   5185,
         1062,    664,    952,   3490,   2811,   2749,   2848,  15555,
          363,    117,   1494,   1647,   5886,   4021,    633,   1013,
         5951,  11343,   2324,    243,    372,    943,    734,    242,
         3161,    122,    127,    201,   1654,    768,    134,   1467,
          642,   1148,   2156,   1368,   1176,    302,   1909,     61,
          223,   1812,    287,    422,    311,    228,    748,    230,
         1876,    539,   1814,    737,    689,   1140,    591,    943,
          353,    289,    198,    490,   7938,   1841,    850,    457,
        814,    146,    551,    728,   1627,    620,    648,   1621,
         2731,    535,     88,   1736,    736,    328,    293,   3170,
          344,    384,   7640,    433,    215,    715,    626,    128,
         3059,   1833,   2069,   3732,   1640,   1508,    836,    567,
         2837,   1151,   2068,    695,   1494,   3173,    364,     88,
          188,    740,    677,    273,   1533,    821,   1091,    293,
          647,    318,   1202,    328,    532,   2847,    526,    721,
          370,    258,    956,   1269,   1641,    339,   1322,   4485,
          286,   1874,    277,    757,   1393,   1330,    380,    146,
          377,    394,    318,    339,   1477,   1886,    101,   1435,
          284,   1425,    686,    621,    221,    117,     87,   1340,
          201,   1243,   1222,    651,   1899,    421,    712,   1016,
         1279,    124,    351,    258,   7043,    368,    666,    162,
         7664,    137,  70159,  26179,   6321,  32236,  33320,    771,
         1169,    269,   1103,    444,    364,   2710,    121,    751,
         1609,    855,   1141,   2287,   1940,   3943,    289])