##################################################################################################
# Adapted from https://github.com/TheAgentCompany/TheAgentCompany/blob/main/evaluation/browsing.py
##################################################################################################

import base64
import os
import re
from dataclasses import dataclass
from enum import Enum, auto
from typing import Union

from openhands.core.logger import openhands_logger as logger
from openhands.events.action import BrowseInteractiveAction
from openhands.events.observation import BrowserOutputObservation
from openhands.runtime.base import Runtime


class ActionType(Enum):
    GOTO = auto()
    FILL = auto()
    CLICK = auto()
    NOOP = auto()


@dataclass
class Selector:
    """Represents either a direct anchor ID or a descriptive selector"""

    value: str
    is_anchor: bool = False

    def __str__(self) -> str:
        return f'{self.value}'


@dataclass
class BrowserAction:
    """Base class for all browser actions"""

    action_type: ActionType

    def to_instruction(self) -> str:
        """Convert the action to a browser instruction string"""
        raise NotImplementedError


@dataclass
class GotoAction(BrowserAction):
    url: str

    def __init__(self, url: str):
        super().__init__(ActionType.GOTO)
        self.url = url

    def to_instruction(self) -> str:
        return f'goto("{self.url}")'


@dataclass
class NoopAction(BrowserAction):
    milliseconds: int

    def __init__(self, milliseconds: int):
        super().__init__(ActionType.NOOP)
        self.milliseconds = milliseconds

    def to_instruction(self) -> str:
        return f'noop({self.milliseconds})'


@dataclass
class InputAction(BrowserAction):
    selector: Selector
    value: str

    def __init__(self, selector: Union[str, Selector], value: str):
        super().__init__(ActionType.FILL)
        self.selector = (
            selector if isinstance(selector, Selector) else Selector(selector)
        )
        self.value = value

    def to_instruction(self) -> str:
        return f'fill("{self.selector}", "{self.value}")'


@dataclass
class ClickAction(BrowserAction):
    selector: Selector

    def __init__(self, selector: Union[str, Selector]):
        super().__init__(ActionType.CLICK)
        self.selector = (
            selector if isinstance(selector, Selector) else Selector(selector)
        )

    def to_instruction(self) -> str:
        return f'click("{self.selector}")'


def parse_content_to_elements(content: str) -> dict[str, str]:
    """Parse the observation content into a dictionary mapping anchors to their descriptions"""
    elements = {}
    current_anchor = None
    description_lines = []

    for line in content.split('\n'):
        line = line.strip()
        if not line:
            continue

        # Check for anchor line
        anchor_match = re.match(r'\[(\d+)\](.*)', line)
        if anchor_match:
            # Save previous element if it exists
            if current_anchor and description_lines:
                elements[current_anchor] = ' '.join(description_lines)

            # Start new element
            current_anchor = anchor_match.group(1)
            description_lines = [anchor_match.group(2).strip()]
        else:
            # Add to current description if we have an anchor
            if current_anchor:
                description_lines.append(line)

    # Save last element
    if current_anchor and description_lines:
        elements[current_anchor] = ' '.join(description_lines)

    return elements


def find_matching_anchor(content: str, selector: str) -> str | None:
    """Find the anchor ID that matches the given selector description"""
    elements = parse_content_to_elements(content)

    # Clean up selector and create a pattern
    selector = selector.lower().strip()

    for anchor, description in elements.items():
        description = description.lower().strip()
        if selector in description:
            return anchor

    return None


def resolve_action(action: BrowserAction, content: str) -> BrowserAction:
    """Resolve any descriptive selectors in the action to anchor IDs based on the content.
    Returns a new action with resolved selectors.
    """
    if isinstance(action, (InputAction, ClickAction)):
        if not action.selector.is_anchor:
            anchor = find_matching_anchor(content, action.selector.value)
            if anchor:
                new_selector = Selector(anchor, is_anchor=True)
                if isinstance(action, InputAction):
                    return InputAction(new_selector, action.value)
                else:
                    return ClickAction(new_selector)
            else:
                logger.error(f'NO MATCH FOUND FOR SELECTOR, {action.selector}')
                return None
    return action


def pre_login(
    runtime: Runtime,
    services: list[str],
    save_screenshots=True,
    screenshots_dir='screenshots',
):
    """Logs in to all the websites that are needed for the evaluation.
    Once logged in, the sessions would be cached in the browser, so OpenHands
    agent doesn't need to log in to these websites again.
    """
    owncloud_login_actions = [
        GotoAction('http://the-agent-company.com:8092'),
        NoopAction(1000),
        InputAction("textbox '', clickable, focused, required", 'theagentcompany'),
        NoopAction(1000),
        InputAction("textbox '', clickable, required", 'theagentcompany'),
        NoopAction(1000),
        ClickAction("button '', clickable"),
        NoopAction(1000),
    ]

    rocketchat_login_actions = [
        GotoAction('http://the-agent-company.com:3000'),
        NoopAction(1000),
        InputAction("textbox '', clickable, focused", 'theagentcompany'),
        NoopAction(1000),
        InputAction("textbox '', clickable", 'theagentcompany'),
        NoopAction(1000),
        ClickAction("button 'Login', clickable"),
    ]

    gitlab_login_actions = [
        GotoAction('http://the-agent-company.com:8929/users/sign_in'),
        NoopAction(1000),
        InputAction("textbox 'Username or primary email'", 'root'),
        NoopAction(1000),
        InputAction("textbox 'Password'", 'theagentcompany'),
        NoopAction(1000),
        ClickAction("button 'Sign in', clickable"),
    ]

    # devnote: plane reset is not stable, and sometimes it fails to launch
    # in which case the login action will fail, and then we would skip the task
    plane_login_actions = [
        GotoAction('http://the-agent-company.com:8091'),
        NoopAction(1000),
        InputAction(
            "textbox 'Email', clickable, focused",
            'agent@company.com',
        ),
        NoopAction(1000),
        ClickAction("button 'Continue'"),
        NoopAction(1000),
        InputAction("textbox 'Enter password', clickable", 'theagentcompany'),
        NoopAction(1000),
        ClickAction("button 'Go to workspace'"),
    ]

    all_login_actions = [
        ('owncloud', owncloud_login_actions),
        ('rocketchat', rocketchat_login_actions),
        ('gitlab', gitlab_login_actions),
        ('plane', plane_login_actions),
    ]

    for website_name, login_actions in all_login_actions:
        if website_name not in services:
            logger.info(
                f"Skipping login for {website_name} because it's not in the list of services to reset"
            )
            continue

        if save_screenshots:
            directory = os.path.join(screenshots_dir, website_name)
            if not os.path.exists(directory):
                os.makedirs(directory)
            image_id = 0
        obs: BrowserOutputObservation = None
        for action in login_actions:
            # Resolve any descriptive selectors to anchor IDs
            if obs:
                action = resolve_action(action, obs.get_agent_obs_text())

            if not action:
                logger.error(f'FAILED TO RESOLVE ACTION, {action}')
                raise Exception(
                    'FAILED TO RESOLVE ACTION, maybe the service is not available'
                )

            # Convert the action to an instruction string
            instruction = action.to_instruction()

            browser_action = BrowseInteractiveAction(browser_actions=instruction)
            browser_action.set_hard_timeout(10000)
            logger.info(browser_action, extra={'msg_type': 'ACTION'})
            obs: BrowserOutputObservation = runtime.run_action(browser_action)
            logger.debug(obs, extra={'msg_type': 'OBSERVATION'})
            if save_screenshots:
                image_data = base64.b64decode(
                    obs.screenshot.replace('data:image/png;base64,', '')
                )
                with open(os.path.join(directory, f'{image_id}.png'), 'wb') as file:
                    file.write(image_data)
                    image_id += 1
