from selenium.webdriver.remote.webdriver import WebDriver
from selenium.webdriver.remote.webelement import WebElement
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import time

class BasePage:
    """
    The BasePage class serves as a foundation for all page objects.
    It encapsulates common Selenium operations to promote code reuse and
    improve test maintenance.
    """

    def __init__(self, driver: WebDriver):
        """
        Initializes the BasePage with a WebDriver instance.

        :param driver: The WebDriver instance to interact with the browser.
        """
        self.driver = driver
        self.wait = WebDriverWait(driver, 10)  # Default explicit wait of 10 seconds

    def open(self, base_url: str, path: str):
        """
        Navigates to a specific path relative to the base URL.

        :param base_url: The base URL of the web application.
        :param path: The relative path to open (e.g., "/form-elements").
        """
        url = base_url.rstrip('/') + path
        self.driver.get(url)

    def find_element(self, locator: tuple) -> WebElement:
        """
        Finds and returns a web element using an explicit wait.

        :param locator: A tuple containing the locator strategy and value 
                        (e.g., (By.ID, "my-element")).
        :return: The located WebElement.
        """
        return self.wait.until(EC.presence_of_element_located(locator))

    def find_visible_element(self, locator: tuple) -> WebElement:
        """
        Finds and returns a web element that is visible on the page.

        :param locator: A tuple containing the locator strategy and value.
        :return: The located and visible WebElement.
        """
        return self.wait.until(EC.visibility_of_element_located(locator))

    def click(self, locator: tuple):
        """
        Waits for an element to be clickable and then clicks on it.

        :param locator: A tuple containing the locator strategy and value.
        """
        element = self.wait.until(EC.element_to_be_clickable(locator))
        element.click()

    def send_keys(self, locator: tuple, text: str):
        """
        Finds an element, clears its content, and sends keys to it.

        :param locator: A tuple containing the locator strategy and value.
        :param text: The text to send to the element.
        """
        element = self.find_element(locator)
        element.clear()
        element.send_keys(text)

    def get_text(self, locator: tuple) -> str:
        """
        Finds an element and returns its text content.

        :param locator: A tuple containing the locator strategy and value.
        :return: The text content of the element.
        """
        element = self.find_element(locator)
        return element.text

    def is_element_selected(self, locator: tuple) -> bool:
        """
        Checks if a checkbox or radio button element is selected.

        :param locator: A tuple containing the locator strategy and value.
        :return: True if the element is selected, False otherwise.
        """
        element = self.find_element(locator)
        return element.is_selected()

    def is_element_enabled(self, locator: tuple) -> bool:
        """
        Checks if a form element is enabled.

        :param locator: A tuple containing the locator strategy and value.
        :return: True if the element is enabled, False otherwise.
        """
        element = self.find_element(locator)
        return element.is_enabled()

    def switch_to_alert(self):
        """
        Switches the driver's focus to a browser alert.
        
        :return: The alert object.
        """
        return self.wait.until(EC.alert_is_present())


    def back(self):
        """
        Navigates one step backward in the browser history.
        """
        self.driver.back()

    def forward(self):
        """
        Navigates one step forward in the browser history.
        """
        self.driver.forward()

    def refresh(self):
        """
        Refreshes the current page.
        """
        self.driver.refresh()

    def take_screenshot(self, name: str = "screenshot"):
        """
        Captures a screenshot of the current browser window.

        :param name: Base name for the screenshot file.
        :return: The filename of the saved screenshot.
        """
        timestamp = time.strftime("%Y%m%d_%H%M%S")
        filename = f"{name}_{timestamp}.png"
        self.driver.save_screenshot(filename)
        return filename

    def find_elements(self, locator: tuple):
        """
        Finds and returns a list of web elements using an explicit wait.

        :param locator: A tuple containing the locator strategy and value 
                        (e.g., (By.CLASS_NAME, "items")).
        :return: A list of located WebElements.
        """
        return self.wait.until(EC.presence_of_all_elements_located(locator))

    def scroll_into_view(self, locator: tuple):
        """
        Scrolls the page until the specified element is in view.

        :param locator: A tuple containing the locator strategy and value.
        """
        element = self.find_element(locator)
        self.driver.execute_script("arguments[0].scrollIntoView(true);", element)

    def click_by_js(self, locator: tuple):
        """
        Clicks on an element using JavaScript execution.
        Useful when standard Selenium click does not work.

        :param locator: A tuple containing the locator strategy and value.
        """
        element = self.find_element(locator)
        self.driver.execute_script("arguments[0].click();", element)

    def wait_for_text(self, locator: tuple, text: str):
        """
        Waits until the specified text is present within an element.

        :param locator: A tuple containing the locator strategy and value.
        :param text: The text to wait for in the element.
        :return: True if the text is present, False otherwise.
        """
        return self.wait.until(EC.text_to_be_present_in_element(locator, text))

    def wait_for_url_contains(self, url_substring: str):
        """
        Waits until the current URL contains the given substring.

        :param url_substring: The substring to look for in the URL.
        :return: True if the URL contains the substring, False otherwise.
        """
        return self.wait.until(EC.url_contains(url_substring))