#    Copyright (C) 2025 James Brotosky, Brandon Wickline
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.


from dataclasses import asdict
from datetime import datetime, timedelta
import json
import logging
import os
import re
from typing import List

import pandas as pd

from flows.prepPolicy import selectPolicies
from models.agent import Agent
from models.policy import Policy
from services.API import AirlockAPIWrapper
from utils.configmanager import get_protected_json, load_env
from utils.selector import Selector
from utils.utils import colorText, get_sanitized_input

logger = logging.getLogger(__name__)


def devicehistory(api: AirlockAPIWrapper, outputjson: bool):
    agents = selectAgents(api)
    history_days = Selector.select_value(
        prompt="Enter how many days of history to pull (1–150): ",
        value_type=int,
        valid_range=(1, 150),
    )

    if not agents or not history_days:
        print(colorText("No agents selected or invalid history range.", "red"))
        return

    historical_date = (datetime.now() - timedelta(days=history_days)).strftime(
        "%Y-%m-%d"
    )
    today = datetime.now().strftime("%Y-%m-%d")

    all_history = []

    for agent in agents:
        try:
            exechistory = api.history_execution(today, historical_date, agent.hostname)
        except Exception as e:
            print(
                colorText(
                    f"❌ Error retrieving history for {agent.hostname}: {e}", "red"
                )
            )
            continue

        if isinstance(exechistory, list):
            for block in exechistory:
                record = {
                    "Command": block.get("commandline", "N/A"),
                    "Date": block.get("datetime", "N/A"),
                    "Filename": block.get("filename", "N/A"),
                    "Policy Name": block.get("policyname", "N/A"),
                    "Hostname": block.get("hostname", "N/A"),
                    "Hash": block.get("sha256", "N/A"),
                }
                all_history.append(record)

                if not outputjson:
                    for key, value in record.items():
                        print(colorText(f"{key}: {value}", "green"))
                    print("\n")
        else:
            print(
                colorText(f"No execution history found for {agent.hostname}.", "yellow")
            )

    if outputjson:
        print(json.dumps(all_history, indent=2))


def findAllAgents(api):
    # Step 1: Load data from API
    policies = [Policy(**row["data"]) for _, row in api.policy_find_all().iterrows()]
    agents = [Agent(**row["data"]) for _, row in api.agent_find_all().iterrows()]

    for agent in agents:
        agent.enrich_with_policies(policies)

    return agents


def findAgents(api, return_dataframe):
    agents = selectAgents(api)
    working_dir = load_env("WORKING_DIR")

    if not agents:
        logging.warning("No agents or policies found.")
        print("No agents matched the criteria.")
        return

    # Convert enriched agents to DataFrame
    agent_dicts = [asdict(agent) for agent in agents]
    agent_df = pd.DataFrame(agent_dicts)

    if return_dataframe:
        logging.debug("Returning DataFrame to caller.")
        return agent_df

    # Otherwise, print and optionally export
    print(agent_df)
    logging.debug("Displayed DataFrame to console.")

    user_input = (
        get_sanitized_input(
            "\nWould you like to export the results to a CSV file? (y/n): "
        )
        .strip()
        .lower()
    )
    if user_input == "y":
        timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
        filename = f"agentsearch_{timestamp}.csv"
        file_path = os.path.join(str(working_dir), filename)

        agent_df.to_csv(file_path, index=False)
        logging.info(f"Exported DataFrame to {file_path}")

        print(
            colorText(
                f"\n✅ Matched devices exported to: {working_dir}\\{filename}",
                "green",
            )
        )
    else:
        logging.debug("User declined to export the DataFrame.")


def collect_device_names() -> List[str]:
    print(colorText("🔍 Device Search", "cyan"))
    print(
        colorText(
            "Enter the device hostnames you'd like to search for, one per line.", "cyan"
        )
    )
    print(
        colorText(
            "When you're done, press Enter twice (Three times if you have a single device).\n",
            "cyan",
        )
    )
    print(colorText("Example:", "cyan"))
    print(colorText("H00000\nUTN00000\ni-hSuperSecretServer\nu-hVenderBroke\n", "cyan"))
    print(colorText("Paste or type your device names below:", "white"))

    device_input_lines = []
    empty_line_count = 0
    valid_line_pattern = re.compile(r"^[a-zA-Z0-9_\- ]+$")

    while True:
        line = get_sanitized_input("")
        stripped_line = line.strip()

        if stripped_line == "":
            empty_line_count += 1
            if empty_line_count == 2:
                break
            continue
        else:
            empty_line_count = 0

        if valid_line_pattern.match(stripped_line):
            device_input_lines.append(stripped_line)
        else:
            print(
                colorText(
                    f"⚠️ Invalid input: '{stripped_line}' — only letters, numbers, underscores, spaces, and hyphens are allowed.",
                    "yellow",
                )
            )

    return [name for name in device_input_lines if name]


def choose_match_type() -> bool:
    print(colorText("Use exact match? (Y for exact, N for fuzzy):", "white"))
    return get_sanitized_input("").strip().lower() in ["y", "yes"]


def match_agents(
    device_names: List[str], agents: List["Agent"], use_exact: bool
) -> List["Agent"]:
    if use_exact:
        return [
            agent
            for agent in agents
            if agent.hostname.lower() in [name.lower() for name in device_names]
        ]
    else:
        pattern = "|".join(map(re.escape, device_names))
        regex = re.compile(pattern, re.IGNORECASE)
        return [agent for agent in agents if regex.search(agent.hostname)]


def show_unmatched(
    device_names: List[str], matched_agents: List["Agent"], use_exact: bool
):
    if use_exact:
        unmatched = [
            name
            for name in device_names
            if not any(
                agent.hostname.lower() == name.lower() for agent in matched_agents
            )
        ]
    else:
        unmatched = [
            name
            for name in device_names
            if not any(
                re.search(re.escape(name), agent.hostname, re.IGNORECASE)
                for agent in matched_agents
            )
        ]

    if unmatched:
        logger.debug(f"⚠️ No matches for: {', '.join(unmatched)}")
        print(colorText(f"⚠️ No matches for: {', '.join(unmatched)}", "yellow"))


def enrich_agents(agents: List["Agent"], policies: List["Policy"]):
    for agent in agents:
        agent.enrich_with_policies(policies)


def selectAgents(api: "AirlockAPIWrapper") -> List["Agent"]:
    device_names = collect_device_names()
    if not device_names:
        logger.debug("No device names entered")
        print(colorText("⚠️ No device names entered.", "red"))
        return []

    use_exact = choose_match_type()

    policies = [Policy(**row.to_dict()) for _, row in api.policy_find_all().iterrows()]
    agents = [Agent(**row.to_dict()) for _, row in api.agent_find_all().iterrows()]
    matched_agents = match_agents(device_names, agents, use_exact)
    matched_agents.sort(key=lambda agent: agent.hostname.lower())

    show_unmatched(device_names, matched_agents, use_exact)

    if not matched_agents:
        logger.debug("❌ No matching devices found.")
        print(colorText("❌ No matching devices found.", "red"))
        return []

    print(colorText(f"✅ Found {len(matched_agents)} matching device(s).", "green"))
    logger.info("Matched agent hostnames:")
    rows = (len(matched_agents) + 2) // 3  # 3 columns
    for row in range(rows):
        line = ""
        for col in range(3):
            idx = row + col * rows
            if idx < len(matched_agents):
                line += f"{matched_agents[idx].hostname:<30}"
        logger.info(line)

    matched_agents = Selector.select_with_mode(
        matched_agents,
        label_func=lambda agent: agent.hostname,
        header="Matched Devices:",
    )

    if not matched_agents:
        logger.debug("❌ No matching devices remain after refinement.")
        print(colorText("❌ No matching devices remain after refinement.", "red"))
        return []

    enrich_agents(matched_agents, policies)
    return matched_agents


def moveAgentToRelatedPolicy(
    api: AirlockAPIWrapper,
    agent: Agent,
    mode: str = "audit",
):
    """
    Moves an agent between audit and enforcement policies based on the mode.

    Args:
        api: AirlockAPIWrapper instance.
        agent: Agent object.
        policy_relationship_map: Dict mapping enforcement → audit.
        mode: 'audit' to move to audit, 'enforcement' to move to enforcement.
    """
    policy_relationship_map = get_protected_json("POLICY_MAP_ENF_AUD", "{}")

    if mode == "audit":
        if agent.groupid in policy_relationship_map:
            target_policy = policy_relationship_map[agent.groupid]
        elif agent.groupid in policy_relationship_map.values():
            logger.debug(
                f"Agent {agent.hostname} is already in an audit group. No action needed."
            )
            print(
                f"Agent {agent.hostname} is already in an audit group. No action needed."
            )
            return
        else:
            logger.warning(
                f"Error: No corresponding audit policy found for groupid: {agent.groupid}."
            )
            return

    elif mode == "enforcement":
        inverse_map = {v: k for k, v in policy_relationship_map.items()}
        if agent.groupid in inverse_map:
            target_policy = inverse_map[agent.groupid]
        elif agent.groupid in inverse_map.values():
            logger.info(
                f"Agent {agent.hostname} is already in an enforcement group. No action needed."
            )
            return
        else:
            logger.warning(
                f"Error: No corresponding enforcement policy found for groupid: {agent.groupid}."
            )
            return

    else:
        logger.error(f"Unknown mode '{mode}'. Use 'audit' or 'enforcement'.")
        return

    result = api.agent_move(agent.agentid, target_policy)
    return result


def toggleEnforcement(api: AirlockAPIWrapper):
    choices = ["Audit", "Enforcement", "Exit"]
    print(colorText("Move devices to which state?:", "yellow"))
    direction = Selector.select_string(choices, False, False)
    if direction == "Exit":
        pass
    else:
        devices = selectAgents(api)
        for device in devices:
            print(device.hostname)
        confirm = Selector.confirm(
            "Would you like to continue with these devices? Y/N: "
        )
        if direction and devices and confirm:
            for device in devices:
                result = moveAgentToRelatedPolicy(api, device, str(direction).lower())
                logger.info(f"{device.hostname}: result: {result}")
    get_sanitized_input("Press enter to continue")


def moveAgents(api: AirlockAPIWrapper):
    devices = selectAgents(api)
    for device in devices:
        print(device.hostname)
    confirm_devices = Selector.confirm(
        "Would you like to continue with these devices? Y/N: "
    )
    if devices and confirm_devices:
        policies = selectPolicies(api, False)
        confirm_move = Selector.confirm(
            f"Would you like to move these devices to {policies[0].name}?"
        )
        if confirm_move:
            for device in devices:
                result = api.agent_move(device.agentid, policies[0].groupid)
                logger.info(f"{device.hostname}: result: {result}")
        else:
            logger.info("Exiting without change")
    get_sanitized_input("Press enter to continue")