"""Utils to slurp stuff"""

__author__ = 'thorwhalen'


def slurp_with_login_and_pwd():
    import sys
    import mechanize

    # sys.path.append('ClientCookie-1.0.3')
    # from mechanize import ClientCookie
    # sys.path.append('ClientForm-0.1.17')
    # import ClientForm

    # Create special URL opener (for User-Agent) and cookieJar
    cookieJar = mechanize.CookieJar()

    opener = mechanize.build_opener(mechanize.HTTPCookieProcessor(cookieJar))
    opener.addheaders = [('User-agent', 'Mozilla/5.0 (compatible)')]
    mechanize.install_opener(opener)
    fp = mechanize.urlopen('http://login.yahoo.com')
    forms = mechanize.ParseResponse(fp)
    fp.close()

    # print forms on this page
    for form in forms:
        print('***************************')
        print(form)

    form = forms[0]
    form['login'] = 'yahoo-user-id'  # use your userid
    form['passwd'] = 'password'  # use your password
    fp = mechanize.urlopen(form.click())
    fp.close()
    fp = mechanize.urlopen(
        'https://class.coursera.org/ml-003/lecture/download.mp4?lecture_id=1'
    )  # use your group
    fp.readlines()
    fp.close()




def download_file(url, destination_path):
    """
    Downloads a file from a specified URL to a local destination path using HTTP GET request.

    Args:
        url (str): The URL from which to download the file.
        destination_path (str): The local path where the file should be saved.

    Example:
        download_file("http://example.com/file.pdf", "/path/to/local/file.pdf")
    """
    import requests

    response = requests.get(url)
    response.raise_for_status()  # Raises an HTTPError for bad responses

    with open(destination_path, 'wb') as f:
        f.write(response.content)

def configure_browser(user_agent='Mozilla/5.0 (compatible)'):
    """
    Configures and returns a mechanize browser object with custom settings.

    Args:
        user_agent (str): The User-Agent string to be used for the browser.

    Returns:
        mechanize.Browser: A configured mechanize browser object.

    Example:
        browser = configure_browser()
        response = browser.open('http://example.com')
        print(response.read())
    """
    import mechanize

    browser = mechanize.Browser()
    browser.set_handle_robots(False)
    browser.addheaders = [('User-agent', user_agent)]

    return browser

def login_and_navigate(login_url, target_url, login_form_number=0, login_data={}):
    """
    Logs into a website and navigates to a target URL after login.

    Args:
        login_url (str): URL of the login page.
        target_url (str): URL to navigate to after login.
        login_form_number (int): Index of the login form on the login page.
        login_data (dict): Dictionary containing form field names and values.

    Example:
        login_and_navigate(
            "http://login.example.com",
            "http://example.com/profile",
            login_data={'username': 'user', 'password': 'pass'}
        )
    """
    browser = configure_browser()

    browser.open(login_url)
    browser.select_form(nr=login_form_number)
    for field, value in login_data.items():
        browser.form[field] = value
    browser.submit()

    response = browser.open(target_url)
    return response.read()



def extract_forms_from_url(url):
    """
    Extracts and prints all forms available on a given URL using mechanize.

    Args:
        url (str): The URL from which to extract forms.

    Example:
        extract_forms_from_url("http://example.com/login")
    """
    import mechanize

    browser = configure_browser()
    response = browser.open(url)
    forms = mechanize.ParseResponse(response, backwards_compat=False)
    response.close()

    for form in forms:
        print('***************************')
        print(form)

def save_webpage_content(url, file_path):
    """
    Saves the HTML content of a webpage to a specified local file.

    Args:
        url (str): The URL of the webpage to download.
        file_path (str): The local file path to save the webpage content.

    Example:
        save_webpage_content("http://example.com", "example.html")
    """
    import requests

    response = requests.get(url)
    response.raise_for_status()  # Raises an HTTPError for bad responses

    with open(file_path, 'w', encoding='utf-8') as f:
        f.write(response.text)

def simulate_user_interaction(url, interaction_steps):
    """
    Simulates a sequence of user interactions on a webpage using a mechanize browser.

    Args:
        url (str): The initial URL to open.
        interaction_steps (list of tuple): A list of tuples where each tuple represents
                                           an interaction step. Each tuple should have
                                           the form (action, details), where 'action'
                                           can be 'click_link', 'submit_form', etc.,
                                           and 'details' are the parameters for the action.

    Example:
        simulate_user_interaction(
            "http://example.com",
            [
                ('select_form', {'nr': 0}),
                ('form_fill', {'username': 'user', 'password': 'pass'}),
                ('submit', {}),
                ('click_link', {'text': 'Next page'})
            ]
        )
    """
    import mechanize

    browser = configure_browser()
    browser.open(url)

    for action, details in interaction_steps:
        if action == 'select_form':
            browser.select_form(nr=details['nr'])
        elif action == 'form_fill':
            for field, value in details.items():
                browser.form[field] = value
        elif action == 'submit':
            browser.submit()
        elif action == 'click_link':
            try:
                link = browser.find_link(text=details['text'])
                browser.follow_link(link)
            except mechanize.LinkNotFoundError:
                print("Link not found:", details['text'])

def fetch_and_parse_url(url):
    """
    Fetches a URL using mechanize and returns both the response and parsed forms.

    Args:
        url (str): The URL to fetch and parse.

    Returns:
        tuple: A tuple containing the mechanize response object and a list of parsed forms.

    Example:
        response, forms = fetch_and_parse_url("http://example.com/login")
    """
    import mechanize

    browser = configure_browser()
    response = browser.open(url)
    forms = mechanize.ParseResponse(response, backwards_compat=False)
    return response, forms