import os.path
import random

import file_utils
import xml_utils


def change_application(game, sdk, sub_channel, config, target_application):
    """
    修改最顶级的application
    """
    decompile_path = file_utils.get_decompile_path(game, sdk, sub_channel, config['cache'])
    manifest = os.path.join(decompile_path, 'AndroidManifest.xml')
    application = xml_utils.get_application_attr(manifest, 'name')

    if application is None:
        xml_utils.change_application_attr(manifest, 'name', target_application)

        print('change add application %s' % target_application)
    else:
        smaliPath = os.path.join(decompile_path, 'smali')
        super_application = find_super_application(smaliPath, application)
        print('super application is %s' % super_application)

        if super_application == target_application:
            return
        change_super_application(smaliPath, super_application, target_application.replace('.', '/'))

        print('change super application %s to %s' % (super_application, target_application))


def change_top_application(game, sdk, sub_channel, config, target_application):
    """
    修改manifest清单下的application入口。
    PS：例八门渠道，因游戏app继承到渠道app过程中有停住，未进入到渠道app初始化，故改用渠道app为入口,继承原游戏app确保他们的功能正常运行
    """

    decompliePath = file_utils.get_decompile_path(game, sdk, sub_channel, config['cache'])
    manifest = os.path.join(decompliePath, 'AndroidManifest.xml')
    gameApplication = xml_utils.get_application_attr(manifest, 'name')
    print("游戏application" + gameApplication)
    xml_utils.change_application_attr(manifest, 'name', target_application)
    # if application is None:
    #     xml_utils.changeApplicationAttr(manifest, 'name', targetApplication)
    #
    #     print('change add application %s' % targetApplication)
    # else:
    smaliPath = os.path.join(decompliePath, 'smali')
    superApplication = find_super_application(smaliPath, target_application)
    print('寻找入口application。super application is %s' % superApplication)
    change_super_application(smaliPath, superApplication, gameApplication.replace('.', '/'))

    print('change super application %s to %s' % (target_application, gameApplication))


def find_super_application(base_path, class_name):
    """
    获取最顶级的application
    """
    tagSuper = '.super Landroid/app/Application;'
    tag = '.super L'
    applicationFile = file_utils.get_package_path(base_path, class_name) + '.smali'

    topClassName = None
    superClass = None
    with open_file(applicationFile, 'r') as f:
        line = f.readline()

        while line:
            if tagSuper in line:
                topClassName = class_name
                break
            elif tag in line:
                superClass = line[8:-2]
                superClass = superClass.replace('/', '.')
                break

            line = f.readline()

    if topClassName is not None:
        return topClassName
    elif superClass is not None:
        return find_super_application(base_path, superClass)


def change_super_application(base_path, class_name, target_application):
    """
    更改application
    """
    applicationFile = file_utils.get_package_path(base_path, class_name) + '.smali'

    # 修改application
    change_supper_application_smali(applicationFile, target_application)


def change_supper_application_smali(file, application):
    """
    修改application.smali
    """
    contentSpuer = '.super Landroid/app/Application;'
    constructor = '.method public constructor <init>()V'
    direct = 'invoke-direct'
    invokeSuper = 'invoke-super'
    applicationTag = 'Landroid/app/Application;->'
    newContent = ''

    with open_file(file, 'r+') as f:
        line = f.readline()
        isConstructor = False

        while line:
            if contentSpuer in line:
                newContent += '.super L%s;\n' % application
            elif invokeSuper in line and applicationTag in line:
                newContent += line.replace('android/app/Application', application)
            elif isConstructor and direct in line and applicationTag in line:
                newContent += line.replace('android/app/Application', application)
                isConstructor = False
            else:
                if constructor in line:
                    isConstructor = True
                newContent += line

            line = f.readline()

        f.seek(0, 0)
        # 清空内容
        f.truncate()
        f.write(newContent)
    return 0


def get_random_number(size):
    content = ""
    for i in range(6):
        ch = chr(random.randrange(ord('0'), ord('9') + 1))
        content += ch
    return content


def open_file(file, mode):
    return file_utils.open_file(file, mode)