import re
import logging
import json
from langchain.schema import (
    HumanMessage,
    SystemMessage,
)
import requests
from datetime import datetime
from uuid import uuid4
import random



def save_logs(scheduler, JSON_DATASET_PATH, logs, feedback=None) -> None:
    """ Every interaction with app saves the log of question and answer, 
        this is to get the usage statistics of app and evaluate model performances
        Also adding feedback and timestamp 
    """
    try:
        # We get the timestamp here now because we are simply recording time of logging
        current_time = datetime.now().timestamp()
        logs["time"] = str(current_time)
        
        # Save feedback (if any)
        if feedback:
            logs["feedback"] = feedback
            logs["record_id"] = str(uuid4())

        # Do some reordering to keep things clean (time up front)
        field_order = [
            "record_id",
            "session_id",
            "time",  # current log time
            "session_duration_seconds",
            "client_location",
            "platform",
            "system_prompt",
            "sources",
            "reports",
            "subtype",
            "year",
            "question",
            "retriever",
            "endpoint_type",
            "reader",
            "docs",
            "answer",
            "feedback"
        ]
        ordered_logs = {k: logs.get(k) for k in field_order if k in logs}

        with scheduler.lock:
            with open(JSON_DATASET_PATH, 'a') as f:
                json.dump(ordered_logs, f)
                f.write("\n")
                logging.info("logging done")
    except Exception as e:
        raise


def get_message_template(type, SYSTEM_PROMPT, USER_PROMPT):
    if type == 'NVIDIA':
        messages =  [{"role": "system", "content": SYSTEM_PROMPT},
                {"role":"user","content":USER_PROMPT}]
    elif type == 'DEDICATED':
        messages = [
                 SystemMessage(content=SYSTEM_PROMPT),
                 HumanMessage(content=USER_PROMPT),]
    else:
        messages = None
    
    return messages


def make_html_source(source,i):
    """
    takes the text and converts it into html format for display in "source" side tab
    """
    meta = source.metadata
    content = source.page_content.strip()

    name = meta['subtype']
    card = f"""
        <div class="card" id="doc{i}">
            <div class="card-content">
                <h2>Doc {i} - {meta['subtype']} - Page {int(meta['page'])}</h2>
                <p>{content}</p>
            </div>
            <div class="card-footer">
                <span>{name}</span>
                <a href="{meta['subtype']}#page={int(meta['page'])}" target="_blank" class="pdf-link">
                    <span role="img" aria-label="Open PDF">🔗</span>
                </a>
            </div>
        </div>
        """

    return card


def parse_output_llm_with_sources(output):
    # Split the content into a list of text and "[Doc X]" references
    content_parts = re.split(r'\[(Doc\s?\d+(?:,\s?Doc\s?\d+)*)\]', output)
    parts = []
    for part in content_parts:
        if part.startswith("Doc"):
            subparts = part.split(",")
            subparts = [subpart.lower().replace("doc","").strip() for subpart in subparts]
            subparts = [f"""<a href="#doc{subpart}" class="a-doc-ref" target="_self"><span class='doc-ref'><sup>{subpart}</sup></span></a>""" for subpart in subparts]
            parts.append("".join(subparts))
        else:
            parts.append(part)
    content_parts = "".join(parts)
    return content_parts

def get_client_ip(request=None):
    """Get the client IP address from the request context"""
    try:
        if request:
            # Try different headers that might contain the real IP
            ip = request.client.host
            # Check for proxy headers
            forwarded_for = request.headers.get('X-Forwarded-For')
            if forwarded_for:
                # X-Forwarded-For can contain multiple IPs - first one is the client
                ip = forwarded_for.split(',')[0].strip()
            
            logging.debug(f"Client IP detected: {ip}")
            return ip
    except Exception as e:
        logging.error(f"Error getting client IP: {e}")
    return "127.0.0.1"


def get_client_location(ip_address) -> dict | None:
    """Get geolocation info using ipapi.co"""
    # Add headers so we don't get blocked...
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
    }
    try:
        response = requests.get(
            f'https://ipapi.co/{ip_address}/json/',
            headers=headers,
            timeout=5
        )
        if response.status_code == 200:
            data = response.json()
            # Add random noise between -0.01 and 0.01 degrees (roughly ±1km)
            lat = data.get('latitude')
            lon = data.get('longitude')
            if lat is not None and lon is not None:
                lat += random.uniform(-0.01, 0.01)
                lon += random.uniform(-0.01, 0.01)
            
            return {
                'city': data.get('city'),
                'region': data.get('region'),
                'country': data.get('country_name'),
                'latitude': lat,
                'longitude': lon
            }
        elif response.status_code == 429:
            logging.warning(f"Rate limit exceeded. Response: {response.text}")
            return None
        else:
            logging.error(f"Error: Status code {response.status_code}. Response: {response.text}")
            return None
            
    except requests.exceptions.RequestException as e:
        logging.error(f"Request failed: {str(e)}")
        return None
    

def get_platform_info(user_agent: str) -> str:
    """Get platform info"""
    # Make a best guess at the device type
    if any(mobile_keyword in user_agent.lower() for mobile_keyword in ['mobile', 'android', 'iphone', 'ipad', 'ipod']):
        platform_info = 'mobile'
    else:
        platform_info = 'desktop'
            
    return platform_info