# sync_logic.py
"""
Handles the logic for syncing LinkedIn data: posts, mentions, and follower statistics.
Fetches data from LinkedIn APIs and uploads to Bubble.
"""
import pandas as pd
import logging
import html

# Assuming Bubble_API_Calls contains bulk_upload_to_bubble
from Bubble_API_Calls import bulk_upload_to_bubble

# Assuming Linkedin_Data_API_Calls contains all necessary LinkedIn data fetching and processing functions
from Linkedin_Data_API_Calls import (
    fetch_linkedin_posts_core,
    fetch_comments,
    analyze_sentiment, # For post comments
    compile_detailed_posts,
    prepare_data_for_bubble, # For posts, stats, comments
    fetch_linkedin_mentions_core,
    analyze_mentions_sentiment, # For individual mentions
    compile_detailed_mentions, # Compiles to user-specified format
    prepare_mentions_for_bubble # Prepares user-specified format for Bubble
)
# Assuming linkedin_follower_stats.py contains get_linkedin_follower_stats
from linkedin_follower_stats import get_linkedin_follower_stats

# Assuming config.py contains all necessary constants
from config import (
    LINKEDIN_POST_URN_KEY, BUBBLE_POST_URN_COLUMN_NAME, BUBBLE_POSTS_TABLE_NAME,
    BUBBLE_POST_STATS_TABLE_NAME, BUBBLE_POST_COMMENTS_TABLE_NAME,
    BUBBLE_MENTIONS_TABLE_NAME, BUBBLE_MENTIONS_ID_COLUMN_NAME, BUBBLE_MENTIONS_DATE_COLUMN_NAME,
    DEFAULT_MENTIONS_INITIAL_FETCH_COUNT, DEFAULT_MENTIONS_UPDATE_FETCH_COUNT,
    BUBBLE_FOLLOWER_STATS_TABLE_NAME, FOLLOWER_STATS_TYPE_COLUMN, FOLLOWER_STATS_CATEGORY_COLUMN,
    FOLLOWER_STATS_ORG_URN_COLUMN, FOLLOWER_STATS_ORGANIC_COLUMN, FOLLOWER_STATS_PAID_COLUMN,
    LINKEDIN_CLIENT_ID_ENV_VAR
)


def _sync_linkedin_posts_internal(token_state, fetch_count_for_posts_api):
    """Internal logic for syncing LinkedIn posts."""
    logging.info(f"Posts sync: Starting fetch for {fetch_count_for_posts_api} posts.")
    client_id = token_state.get("client_id")
    token_dict = token_state.get("token")
    org_urn = token_state.get('org_urn')
    bubble_posts_df_orig = token_state.get("bubble_posts_df", pd.DataFrame()).copy()
    posts_sync_message = ""

    try:
        processed_raw_posts, stats_map, _ = fetch_linkedin_posts_core(client_id, token_dict, org_urn, count=fetch_count_for_posts_api)

        if not processed_raw_posts:
            posts_sync_message = "Posts: None found via API. "
            logging.info("Posts sync: No raw posts returned from API.")
            return posts_sync_message, token_state

        existing_post_urns = set()
        if not bubble_posts_df_orig.empty and BUBBLE_POST_URN_COLUMN_NAME in bubble_posts_df_orig.columns:
            existing_post_urns = set(bubble_posts_df_orig[BUBBLE_POST_URN_COLUMN_NAME].dropna().astype(str))

        new_raw_posts = [p for p in processed_raw_posts if str(p.get(LINKEDIN_POST_URN_KEY)) not in existing_post_urns]

        if not new_raw_posts:
            posts_sync_message = "Posts: All fetched already in Bubble. "
            logging.info("Posts sync: All fetched posts were already found in Bubble.")
            return posts_sync_message, token_state

        logging.info(f"Posts sync: Processing {len(new_raw_posts)} new raw posts.")
        post_urns_to_process = [p[LINKEDIN_POST_URN_KEY] for p in new_raw_posts if p.get(LINKEDIN_POST_URN_KEY)]

        all_comments_data = fetch_comments(client_id, token_dict, post_urns_to_process, stats_map)
        sentiments_per_post = analyze_sentiment(all_comments_data) # Assumes analysis of comments for posts
        detailed_new_posts = compile_detailed_posts(new_raw_posts, stats_map, sentiments_per_post)

        li_posts, li_post_stats, li_post_comments = prepare_data_for_bubble(detailed_new_posts, all_comments_data)

        if li_posts:
            bulk_upload_to_bubble(li_posts, BUBBLE_POSTS_TABLE_NAME)
            updated_posts_df = pd.concat([bubble_posts_df_orig, pd.DataFrame(li_posts)], ignore_index=True)
            token_state["bubble_posts_df"] = updated_posts_df.drop_duplicates(subset=[BUBBLE_POST_URN_COLUMN_NAME], keep='last')
            logging.info(f"Posts sync: Uploaded {len(li_posts)} new posts to Bubble.")

            if li_post_stats:
                bulk_upload_to_bubble(li_post_stats, BUBBLE_POST_STATS_TABLE_NAME)
                logging.info(f"Posts sync: Uploaded {len(li_post_stats)} post_stats entries.")
            if li_post_comments:
                bulk_upload_to_bubble(li_post_comments, BUBBLE_POST_COMMENTS_TABLE_NAME)
                logging.info(f"Posts sync: Uploaded {len(li_post_comments)} post_comments entries.")
            posts_sync_message = f"Posts: Synced {len(li_posts)} new. "
        else:
            posts_sync_message = "Posts: No new ones to upload after processing. "
            logging.info("Posts sync: No new posts were prepared for Bubble upload.")

    except ValueError as ve:
        posts_sync_message = f"Posts Error: {html.escape(str(ve))}. "
        logging.error(f"Posts sync: ValueError: {ve}", exc_info=True)
    except Exception as e:
        logging.exception("Posts sync: Unexpected error during processing.")
        posts_sync_message = f"Posts: Unexpected error ({type(e).__name__}). "
    return posts_sync_message, token_state


def sync_linkedin_mentions(token_state):
    """Fetches new LinkedIn mentions and uploads them to Bubble."""
    logging.info("Starting LinkedIn mentions sync process.")
    if not token_state or not token_state.get("token"):
        logging.error("Mentions sync: Access denied. No LinkedIn token.")
        return "Mentions: No token. ", token_state

    client_id = token_state.get("client_id")
    token_dict = token_state.get("token")
    org_urn = token_state.get('org_urn')
    # Work with a copy, original df in token_state will be updated at the end
    bubble_mentions_df_orig = token_state.get("bubble_mentions_df", pd.DataFrame()).copy()

    if not org_urn or not client_id or client_id == "ENV VAR MISSING":
        logging.error("Mentions sync: Configuration error (Org URN or Client ID missing).")
        return "Mentions: Config error. ", token_state

    fetch_count_for_mentions_api = 0
    mentions_sync_is_needed_now = False
    if bubble_mentions_df_orig.empty:
        mentions_sync_is_needed_now = True
        fetch_count_for_mentions_api = DEFAULT_MENTIONS_INITIAL_FETCH_COUNT
        logging.info("Mentions sync needed: Bubble DF empty. Fetching initial count.")
    else:
        if BUBBLE_MENTIONS_DATE_COLUMN_NAME not in bubble_mentions_df_orig.columns or \
           bubble_mentions_df_orig[BUBBLE_MENTIONS_DATE_COLUMN_NAME].isnull().all():
            mentions_sync_is_needed_now = True
            fetch_count_for_mentions_api = DEFAULT_MENTIONS_INITIAL_FETCH_COUNT
            logging.info(f"Mentions sync needed: Date column '{BUBBLE_MENTIONS_DATE_COLUMN_NAME}' missing or all null. Fetching initial count.")
        else:
            # Use a copy for date checks to avoid SettingWithCopyWarning if any modification were made
            mentions_df_check = bubble_mentions_df_orig.copy()
            mentions_df_check[BUBBLE_MENTIONS_DATE_COLUMN_NAME] = pd.to_datetime(mentions_df_check[BUBBLE_MENTIONS_DATE_COLUMN_NAME], errors='coerce', utc=True)
            last_mention_date_utc = mentions_df_check[BUBBLE_MENTIONS_DATE_COLUMN_NAME].dropna().max()
            if pd.isna(last_mention_date_utc) or \
               (pd.Timestamp('now', tz='UTC').normalize() - last_mention_date_utc.normalize()).days >= 7:
                mentions_sync_is_needed_now = True
                fetch_count_for_mentions_api = DEFAULT_MENTIONS_UPDATE_FETCH_COUNT
                logging.info(f"Mentions sync needed: Last mention date {last_mention_date_utc} is old or invalid. Fetching update count.")

    if not mentions_sync_is_needed_now:
        logging.info("Mentions data is fresh based on current check. No API fetch needed for mentions.")
        return "Mentions: Up-to-date. ", token_state

    logging.info(f"Mentions sync proceeding. Fetch count: {fetch_count_for_mentions_api}")
    try:
        processed_raw_mentions = fetch_linkedin_mentions_core(client_id, token_dict, org_urn, count=fetch_count_for_mentions_api)
        if not processed_raw_mentions:
            logging.info("Mentions sync: No new mentions found via API.")
            return "Mentions: None found via API. ", token_state

        existing_mention_ids = set()
        if not bubble_mentions_df_orig.empty and BUBBLE_MENTIONS_ID_COLUMN_NAME in bubble_mentions_df_orig.columns:
            existing_mention_ids = set(bubble_mentions_df_orig[BUBBLE_MENTIONS_ID_COLUMN_NAME].dropna().astype(str))

        sentiments_map = analyze_mentions_sentiment(processed_raw_mentions)
        all_compiled_mentions = compile_detailed_mentions(processed_raw_mentions, sentiments_map)

        new_compiled_mentions_to_upload = [
            m for m in all_compiled_mentions if str(m.get("id")) not in existing_mention_ids
        ]

        if not new_compiled_mentions_to_upload:
            logging.info("Mentions sync: All fetched mentions are already in Bubble.")
            return "Mentions: All fetched already in Bubble. ", token_state

        bubble_ready_mentions = prepare_mentions_for_bubble(new_compiled_mentions_to_upload)
        if bubble_ready_mentions:
            bulk_upload_to_bubble(bubble_ready_mentions, BUBBLE_MENTIONS_TABLE_NAME)
            logging.info(f"Successfully uploaded {len(bubble_ready_mentions)} new mentions to Bubble.")
            updated_mentions_df = pd.concat([bubble_mentions_df_orig, pd.DataFrame(bubble_ready_mentions)], ignore_index=True)
            token_state["bubble_mentions_df"] = updated_mentions_df.drop_duplicates(subset=[BUBBLE_MENTIONS_ID_COLUMN_NAME], keep='last')
            return f"Mentions: Synced {len(bubble_ready_mentions)} new. ", token_state
        else:
            logging.info("Mentions sync: No new mentions were prepared for Bubble upload.")
            return "Mentions: No new ones to upload. ", token_state
    except ValueError as ve:
        logging.error(f"ValueError during mentions sync: {ve}", exc_info=True)
        return f"Mentions Error: {html.escape(str(ve))}. ", token_state
    except Exception as e:
        logging.exception("Unexpected error in sync_linkedin_mentions.")
        return f"Mentions: Unexpected error ({type(e).__name__}). ", token_state


def sync_linkedin_follower_stats(token_state):
    """Fetches new LinkedIn follower statistics and uploads them to Bubble."""
    logging.info("Starting LinkedIn follower stats sync process.")
    if not token_state or not token_state.get("token"):
        logging.error("Follower Stats sync: Access denied. No LinkedIn token.")
        return "Follower Stats: No token. ", token_state

    client_id = token_state.get("client_id")
    token_dict = token_state.get("token")
    org_urn = token_state.get('org_urn')
    bubble_follower_stats_df_orig = token_state.get("bubble_follower_stats_df", pd.DataFrame()).copy()

    if not org_urn or not client_id or client_id == "ENV VAR MISSING":
        logging.error("Follower Stats sync: Configuration error (Org URN or Client ID missing).")
        return "Follower Stats: Config error. ", token_state

    follower_stats_sync_is_needed_now = False
    if bubble_follower_stats_df_orig.empty:
        follower_stats_sync_is_needed_now = True
        logging.info("Follower stats sync needed: Bubble DF is empty.")
    else:
        monthly_gains_df_check = bubble_follower_stats_df_orig[bubble_follower_stats_df_orig[FOLLOWER_STATS_TYPE_COLUMN] == 'follower_gains_monthly'].copy()
        if monthly_gains_df_check.empty or FOLLOWER_STATS_CATEGORY_COLUMN not in monthly_gains_df_check.columns:
            follower_stats_sync_is_needed_now = True
            logging.info("Follower stats sync needed: Monthly gains data missing or date column absent.")
        else:
            monthly_gains_df_check.loc[:, FOLLOWER_STATS_CATEGORY_COLUMN] = pd.to_datetime(monthly_gains_df_check[FOLLOWER_STATS_CATEGORY_COLUMN], errors='coerce').dt.normalize()
            last_gain_date = monthly_gains_df_check[FOLLOWER_STATS_CATEGORY_COLUMN].dropna().max()
            
            if pd.isna(last_gain_date):
                 follower_stats_sync_is_needed_now = True
                 logging.info("Follower stats sync needed: No valid dates in monthly gains after conversion for check.")
            else:
                if last_gain_date.tzinfo is None or last_gain_date.tzinfo.utcoffset(last_gain_date) is None:
                    last_gain_date = last_gain_date.tz_localize('UTC')
                else:
                    last_gain_date = last_gain_date.tz_convert('UTC')
                
                start_of_current_month = pd.Timestamp('now', tz='UTC').normalize().replace(day=1)
                if last_gain_date < start_of_current_month:
                    follower_stats_sync_is_needed_now = True
                    logging.info(f"Follower stats sync needed: Last gain date {last_gain_date} is old or invalid.")
        
        if bubble_follower_stats_df_orig[bubble_follower_stats_df_orig[FOLLOWER_STATS_TYPE_COLUMN] != 'follower_gains_monthly'].empty:
            follower_stats_sync_is_needed_now = True
            logging.info("Follower stats sync needed: Demographic data (non-monthly) is missing.")

    if not follower_stats_sync_is_needed_now:
        logging.info("Follower stats data is fresh based on current check. No API fetch needed.")
        return "Follower Stats: Data up-to-date. ", token_state

    logging.info(f"Follower stats sync proceeding for org_urn: {org_urn}")
    try:
        api_follower_stats = get_linkedin_follower_stats(client_id, token_dict, org_urn)
        if not api_follower_stats:
            logging.info(f"Follower Stats sync: No stats found via API for org {org_urn}.")
            return "Follower Stats: None found via API. ", token_state

        new_stats_to_upload = []
        api_monthly_gains = [s for s in api_follower_stats if s.get(FOLLOWER_STATS_TYPE_COLUMN) == 'follower_gains_monthly']
        existing_monthly_gain_dates = set()
        if not bubble_follower_stats_df_orig.empty:
            bubble_monthly_df = bubble_follower_stats_df_orig[bubble_follower_stats_df_orig[FOLLOWER_STATS_TYPE_COLUMN] == 'follower_gains_monthly']
            if FOLLOWER_STATS_CATEGORY_COLUMN in bubble_monthly_df.columns:
                existing_monthly_gain_dates = set(bubble_monthly_df[FOLLOWER_STATS_CATEGORY_COLUMN].astype(str).unique())

        for gain_stat in api_monthly_gains:
            if str(gain_stat.get(FOLLOWER_STATS_CATEGORY_COLUMN)) not in existing_monthly_gain_dates:
                new_stats_to_upload.append(gain_stat)

        api_demographics = [s for s in api_follower_stats if s.get(FOLLOWER_STATS_TYPE_COLUMN) != 'follower_gains_monthly']
        existing_demographics_map = {}
        if not bubble_follower_stats_df_orig.empty:
            bubble_demographics_df = bubble_follower_stats_df_orig[bubble_follower_stats_df_orig[FOLLOWER_STATS_TYPE_COLUMN] != 'follower_gains_monthly']
            if not bubble_demographics_df.empty and \
               all(col in bubble_demographics_df.columns for col in [
                   FOLLOWER_STATS_ORG_URN_COLUMN, FOLLOWER_STATS_TYPE_COLUMN,
                   FOLLOWER_STATS_CATEGORY_COLUMN, FOLLOWER_STATS_ORGANIC_COLUMN,
                   FOLLOWER_STATS_PAID_COLUMN
               ]):
                for _, row in bubble_demographics_df.iterrows():
                    key = (
                        str(row[FOLLOWER_STATS_ORG_URN_COLUMN]),
                        str(row[FOLLOWER_STATS_TYPE_COLUMN]),
                        str(row[FOLLOWER_STATS_CATEGORY_COLUMN])
                    )
                    existing_demographics_map[key] = (
                        row[FOLLOWER_STATS_ORGANIC_COLUMN],
                        row[FOLLOWER_STATS_PAID_COLUMN]
                    )
        for demo_stat in api_demographics:
            key = (
                str(demo_stat.get(FOLLOWER_STATS_ORG_URN_COLUMN)),
                str(demo_stat.get(FOLLOWER_STATS_TYPE_COLUMN)),
                str(demo_stat.get(FOLLOWER_STATS_CATEGORY_COLUMN))
            )
            api_counts = (
                demo_stat.get(FOLLOWER_STATS_ORGANIC_COLUMN, 0),
                demo_stat.get(FOLLOWER_STATS_PAID_COLUMN, 0)
            )
            if key not in existing_demographics_map or existing_demographics_map[key] != api_counts:
                new_stats_to_upload.append(demo_stat)

        if not new_stats_to_upload:
            logging.info(f"Follower Stats sync: Data for org {org_urn} is up-to-date or no changes found.")
            return "Follower Stats: Data up-to-date or no changes. ", token_state

        bulk_upload_to_bubble(new_stats_to_upload, BUBBLE_FOLLOWER_STATS_TABLE_NAME)
        logging.info(f"Successfully uploaded {len(new_stats_to_upload)} follower stat entries to Bubble for org {org_urn}.")

        temp_df = pd.concat([bubble_follower_stats_df_orig, pd.DataFrame(new_stats_to_upload)], ignore_index=True)
        monthly_part = temp_df[temp_df[FOLLOWER_STATS_TYPE_COLUMN] == 'follower_gains_monthly'].drop_duplicates(
            subset=[FOLLOWER_STATS_ORG_URN_COLUMN, FOLLOWER_STATS_CATEGORY_COLUMN],
            keep='last'
        )
        demographics_part = temp_df[temp_df[FOLLOWER_STATS_TYPE_COLUMN] != 'follower_gains_monthly'].drop_duplicates(
            subset=[FOLLOWER_STATS_ORG_URN_COLUMN, FOLLOWER_STATS_TYPE_COLUMN, FOLLOWER_STATS_CATEGORY_COLUMN],
            keep='last'
        )
        token_state["bubble_follower_stats_df"] = pd.concat([monthly_part, demographics_part], ignore_index=True)
        return f"Follower Stats: Synced {len(new_stats_to_upload)} entries. ", token_state
    except ValueError as ve:
        logging.error(f"ValueError during follower stats sync for {org_urn}: {ve}", exc_info=True)
        return f"Follower Stats Error: {html.escape(str(ve))}. ", token_state
    except Exception as e:
        logging.exception(f"Unexpected error in sync_linkedin_follower_stats for {org_urn}.")
        return f"Follower Stats: Unexpected error ({type(e).__name__}). ", token_state


def sync_all_linkedin_data_orchestrator(token_state):
    """Orchestrates the syncing of all LinkedIn data types (Posts, Mentions, Follower Stats)."""
    logging.info("Starting sync_all_linkedin_data_orchestrator process.")
    if not token_state or not token_state.get("token"):
        logging.error("Sync All: Access denied. LinkedIn token not available.")
        return "<p style='color:red; text-align:center;'>❌ Access denied. LinkedIn token not available.</p>", token_state

    org_urn = token_state.get('org_urn')
    client_id = token_state.get("client_id") # Client ID should be in token_state from process_and_store_bubble_token

    posts_sync_message = ""
    mentions_sync_message = ""
    follower_stats_sync_message = ""

    if not org_urn:
        logging.error("Sync All: Org URN missing in token_state.")
        return "<p style='color:red;'>❌ Config error: Org URN missing.</p>", token_state
    if not client_id or client_id == "ENV VAR MISSING": # Check client_id from token_state
        logging.error("Sync All: Client ID missing or not set in token_state.")
        return "<p style='color:red;'>❌ Config error: Client ID missing.</p>", token_state

    # --- Sync Posts ---
    fetch_count_for_posts_api = token_state.get('fetch_count_for_api', 0)
    if fetch_count_for_posts_api == 0:
        posts_sync_message = "Posts: Already up-to-date. "
        logging.info("Posts sync: Skipped as fetch_count_for_posts_api is 0.")
    else:
        posts_sync_message, token_state = _sync_linkedin_posts_internal(token_state, fetch_count_for_posts_api)

    # --- Sync Mentions ---
    mentions_sync_message, token_state = sync_linkedin_mentions(token_state)

    # --- Sync Follower Stats ---
    follower_stats_sync_message, token_state = sync_linkedin_follower_stats(token_state)

    logging.info(f"Sync process complete. Messages: Posts: [{posts_sync_message.strip()}], Mentions: [{mentions_sync_message.strip()}], Follower Stats: [{follower_stats_sync_message.strip()}]")
    final_message = f"<p style='color:green; text-align:center;'>✅ Sync Attempted. {posts_sync_message} {mentions_sync_message} {follower_stats_sync_message}</p>"
    return final_message, token_state