from decorator import decorator
import re


@decorator
def rule1_decorator(f, *args, **kwargs):
    """
        处理表头第二格合并至第三格的情况
        predict_line = ['项目 ', '', '每100克营养素参考值%', '']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    idx = 0
    if '' in predict_line:
        idx = predict_line.index('')
    try:
        if idx == 1:
            if '项目' in predict_line[0] and '每100克' in predict_line[2]:
                predict_line[1] = '每100克'
                r = re.split('每100克', predict_line[2])
                if len(r) == 2 and r[1]:
                    predict_line[2] = r[1]
    except IndexError as e:
        print('rule1_decorator', e)
    return predict_line


@decorator
def rule2_decorator(f, *args, **kwargs):
    """
        处理碳水化合物这一行，第二格合并至第一格的问题
        predict_line = ['碳水化合物18.2克', '', '6%', '']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    idx = 0
    if '' in predict_line:
        idx = predict_line.index('')
    try:
        if idx == 1:
            if '化合物' in predict_line[0]:
                r = re.split('化合物', predict_line[0])
                predict_line[0] = '碳水化合物'
                if len(r) == 2 and r[1]:
                    predict_line[1] = r[1]
    except IndexError as e:
        print('rule2_decorator', e)
    return predict_line


@decorator
def rule3_decorator(f, *args, **kwargs):
    """
        处理易错字
        ['患直质', '1.6克', '3%', '']
        ['脂扇', '1.1', '19%', '']
        ['碳水化合物', '勿18.2克', '6%', '']
        ['能量.', '408千焦',	'5%']
        ['——精', '2.9克']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    predict_line = [re.sub('患直质', '蛋白质', s) for s in predict_line]
    predict_line = [re.sub('脂扇', '脂肪', s) for s in predict_line]
    predict_line = [re.sub('勿(.*克)', '\\1', s) for s in predict_line]
    predict_line = [re.sub('毫 克', '毫克', s) for s in predict_line]
    predict_line = [re.sub('——精', '——糖', s) for s in predict_line]
    return predict_line


@decorator
def rule4_decorator(f, *args, **kwargs):
    """
        处理表头第一格合并至第二格的问题
        ['', '项目每100克', '营养素参考值']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    try:
        if '项目' in predict_line[1] and predict_line[0] == '':
            predict_line[0] = '项目'
            predict_line[1] = predict_line[1].replace('项目', '')
    except IndexError as e:
        print('rule4_decorator', e)
    return predict_line


@decorator
def rule5_decorator(f, *args, **kwargs):
    """
        处理表头第三格合并至第二格的问题
        predict_line = ['项目 ', '每份（70g）营养素参考值%', '']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    try:
        if '项目' in predict_line[0] and '营养素参考值' in predict_line[1] and len(predict_line[1]) > 7 and \
                predict_line[2] == '':
            predict_line[2] = '营养素参考值'
            if len(predict_line[1].split('营养素参考值')) > 1:
                predict_line[2] = predict_line[2] + predict_line[1].split('营养素参考值')[1]
            predict_line[1] = predict_line[1].split('营养素参考值')[0]
    except IndexError as e:
        print('rule5_decorator', e)
    return predict_line


@decorator
def rule6_decorator(f, *args, **kwargs):
    """
        处理表头第二格合并至第三格的问题
        predict_line = ['项目 ', '', '每份（70g）营养素参考值%', '']
    """
    predict_line = args[1]
    predict_line = f(*args, **kwargs)
    idx = 0
    if '' in predict_line:
        idx = predict_line.index('')
    try:
        if idx == 1:
            if '项目' in predict_line[0] and '每份' in predict_line[2] and '营养素参考值' in predict_line[2]:
                predict_line[1] = predict_line[2].split('营养素参考值')[0]
                r = predict_line[2].split('营养素参考值')
                if len(r) == 2:
                    predict_line[2] = '营养素参考值' + r[1]
    except IndexError as e:
        print('rule6_decorator', e)
    return predict_line

@decorator
def rule7_decorator(f, *args, **kwargs):
    """
        处理项目缺一个字未识别出的问题
        predict_line = ['项', '每份（70g）', '营养素参考值%', '']
    """
    predict_line = f(*args, **kwargs)
    try:
        if '项目' in predict_line[0] or '项' in predict_line[0] or '目' in predict_line[0]:
            predict_line[0] = '项目'
    except IndexError as e:
        print('rule7_decorator', e)
    return predict_line

@decorator
def rule8_decorator(f, *args, **kwargs):
    """
        处理表头数据集中在第三格的问题
        predict_line = ['', '', '项目每份（70g）营养素参考值%', '']
    """
    predict_line = f(*args, **kwargs)
    try:
        if len(predict_line) >= 3 \
                and '' == predict_line[0] \
                and '' in predict_line[1] \
                and ('项' in predict_line[2] or '目' in predict_line[2]) \
                and ('100' in predict_line[2] or '克' in predict_line[2]) \
                and '营养' in predict_line[2]:
            predict_line[0] = '项目'
            predict_line[1] = '每100克'
            predict_line[2] = '营养素参考值%'
    except IndexError as e:
        print('rule8_decorator', e)
    return predict_line


decorators = []


def register_decorator(dtor):
    decorators.append(dtor)


def combined_decorator(func):
    for dtor in reversed(decorators):
        func = dtor(func)
    return func


register_decorator(rule1_decorator)
register_decorator(rule2_decorator)
register_decorator(rule3_decorator)
register_decorator(rule4_decorator)
register_decorator(rule5_decorator)
register_decorator(rule6_decorator)
register_decorator(rule7_decorator)
register_decorator(rule8_decorator)