"""Admin route registration."""

import logging
import os
import shutil
from datetime import datetime

from flask import flash, redirect, render_template, request, url_for
from flask_login import current_user, login_required

from database import db
from extensions import get_polling_service
from models import PollLog, PollSource
from services import load_platform_config, post_service

logger = logging.getLogger(__name__)


def _require_admin(redirect_endpoint="index", message="Access denied"):
    if current_user.is_admin:
        return None
    flash(message, "error")
    return redirect(url_for(redirect_endpoint))


def register_admin_routes(app, user_service):
    """Register admin routes while preserving endpoint names."""

    @app.route("/admin")
    @login_required
    def admin_panel():
        """Admin panel - user management."""
        denied = _require_admin("index", "Access denied. Admin privileges required.")
        if denied:
            return denied

        if not user_service:
            flash("User service not available", "error")
            return redirect(url_for("index"))

        users = user_service.get_all_users()
        return render_template("admin.html", users=users)

    @app.route("/admin/user/<user_id>/delete", methods=["POST"])
    @login_required
    def admin_delete_user(user_id):
        """Delete user (admin only)."""
        denied = _require_admin("index")
        if denied:
            return denied

        if current_user.id == user_id:
            flash("You cannot delete your own account!", "error")
            return redirect(url_for("admin_panel"))

        user = user_service.get_user_by_id(user_id)
        if user:
            username = user.username
            if user_service.delete_user(user_id):
                flash(f"User {username} has been deleted.", "success")
                logger.info(f"Admin {current_user.id} deleted user {username} ({user_id})")
            else:
                flash("Error deleting user", "error")
                logger.error(f"Failed to delete user {user_id}")
        else:
            flash("User not found", "error")

        return redirect(url_for("admin_panel"))

    @app.route("/admin/user/<user_id>/toggle-admin", methods=["POST"])
    @login_required
    def admin_toggle_admin(user_id):
        """Toggle user admin status."""
        denied = _require_admin("index")
        if denied:
            return denied

        target_user = user_service.get_user_by_id(user_id)
        if target_user:
            user_service.update_user_admin_status(user_id, not target_user.is_admin)
            flash("Admin status updated", "success")
        else:
            flash("User not found", "error")

        return redirect(url_for("admin_panel"))

    @app.route("/admin/clear_cache", methods=["POST"])
    @login_required
    def admin_clear_cache():
        """Clear application cache."""
        denied = _require_admin("admin_panel")
        if denied:
            return denied

        try:
            for cache_dir in ["cache", "temp"]:
                if os.path.exists(cache_dir):
                    shutil.rmtree(cache_dir)
            post_service.invalidate()
            flash("Cache cleared successfully", "success")
            logger.info(f"Cache cleared by admin user {current_user.id}")
        except Exception as e:
            flash(f"Error clearing cache: {str(e)}", "error")
            logger.error(f"Cache clearing error: {e}")

        return redirect(url_for("admin_panel"))

    @app.route("/admin/backup_data", methods=["POST"])
    @login_required
    def admin_backup_data():
        """Create backup of application data."""
        denied = _require_admin("admin_panel")
        if denied:
            return denied

        try:
            timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
            backup_name = f"balanceboard_backup_{timestamp}"
            backup_dir = f"backups/{backup_name}"
            os.makedirs(backup_dir, exist_ok=True)

            for dir_name in ["data", "templates", "themes", "static"]:
                if os.path.exists(dir_name):
                    shutil.copytree(dir_name, f"{backup_dir}/{dir_name}")

            for file_name in ["app.py", "models.py", "database.py", "filtersets.json"]:
                if os.path.exists(file_name):
                    shutil.copy2(file_name, backup_dir)

            flash(f"Backup created: {backup_name}", "success")
        except Exception as e:
            flash(f"Error creating backup: {str(e)}", "error")

        return redirect(url_for("admin_panel"))

    @app.route("/admin/polling")
    @login_required
    def admin_polling():
        """Admin polling management page."""
        denied = _require_admin("index", "Access denied. Admin privileges required.")
        if denied:
            return denied

        sources = PollSource.query.order_by(PollSource.platform, PollSource.display_name).all()
        scheduler_status = get_polling_service().get_status()
        platform_config = load_platform_config()
        return render_template(
            "admin_polling.html",
            sources=sources,
            scheduler_status=scheduler_status,
            platform_config=platform_config,
        )

    @app.route("/admin/polling/add", methods=["POST"])
    @login_required
    def admin_polling_add():
        """Add a new poll source."""
        denied = _require_admin("index")
        if denied:
            return denied

        platform = request.form.get("platform")
        source_id = request.form.get("source_id")
        custom_source_id = request.form.get("custom_source_id")
        display_name = request.form.get("display_name")
        poll_interval = int(request.form.get("poll_interval", 60))
        max_posts = int(request.form.get("max_posts", 100))
        fetch_comments = request.form.get("fetch_comments", "true") == "true"
        priority = request.form.get("priority", "medium")

        if custom_source_id and custom_source_id.strip():
            source_id = custom_source_id.strip()

        if not platform or not source_id or not display_name:
            flash("Missing required fields", "error")
            return redirect(url_for("admin_polling"))

        existing = PollSource.query.filter_by(platform=platform, source_id=source_id).first()
        if existing:
            flash(f"Source {platform}:{source_id} already exists", "warning")
            return redirect(url_for("admin_polling"))

        source = PollSource(
            platform=platform,
            source_id=source_id,
            display_name=display_name,
            poll_interval_minutes=poll_interval,
            max_posts=max_posts,
            fetch_comments=fetch_comments,
            priority=priority,
            enabled=False,
            created_by=current_user.id,
        )
        db.session.add(source)
        db.session.commit()

        flash(f"Added polling source: {display_name}", "success")
        logger.info(f"Admin {current_user.id} added poll source {platform}:{source_id}")
        return redirect(url_for("admin_polling"))

    @app.route("/admin/polling/<source_id>/toggle", methods=["POST"])
    @login_required
    def admin_polling_toggle(source_id):
        """Toggle a poll source on/off."""
        denied = _require_admin("index")
        if denied:
            return denied

        source = PollSource.query.get(source_id)
        if not source:
            flash("Source not found", "error")
            return redirect(url_for("admin_polling"))

        source.enabled = not source.enabled
        db.session.commit()
        status = "enabled" if source.enabled else "disabled"
        flash(f"Polling {status} for {source.display_name}", "success")
        return redirect(url_for("admin_polling"))

    @app.route("/admin/polling/<source_id>/update", methods=["POST"])
    @login_required
    def admin_polling_update(source_id):
        """Update poll source configuration."""
        denied = _require_admin("index")
        if denied:
            return denied

        source = PollSource.query.get(source_id)
        if not source:
            flash("Source not found", "error")
            return redirect(url_for("admin_polling"))

        if request.form.get("poll_interval"):
            source.poll_interval_minutes = int(request.form.get("poll_interval"))
        if request.form.get("max_posts"):
            source.max_posts = int(request.form.get("max_posts"))
        if request.form.get("fetch_comments") is not None:
            source.fetch_comments = request.form.get("fetch_comments") == "true"
        if request.form.get("priority"):
            source.priority = request.form.get("priority")
        if request.form.get("display_name"):
            source.display_name = request.form.get("display_name")

        db.session.commit()
        flash(f"Updated settings for {source.display_name}", "success")
        return redirect(url_for("admin_polling"))

    @app.route("/admin/polling/<source_id>/poll-now", methods=["POST"])
    @login_required
    def admin_polling_poll_now(source_id):
        """Manually trigger polling for a source."""
        denied = _require_admin("index")
        if denied:
            return denied

        source = PollSource.query.get(source_id)
        if not source:
            flash("Source not found", "error")
            return redirect(url_for("admin_polling"))

        try:
            get_polling_service().poll_now(source_id)
            flash(f"Polling started for {source.display_name}", "success")
        except Exception as e:
            flash(f"Error starting poll: {str(e)}", "error")
            logger.error(f"Error triggering poll for {source_id}: {e}")

        return redirect(url_for("admin_polling"))

    @app.route("/admin/polling/<source_id>/delete", methods=["POST"])
    @login_required
    def admin_polling_delete(source_id):
        """Delete a poll source."""
        denied = _require_admin("index")
        if denied:
            return denied

        source = PollSource.query.get(source_id)
        if not source:
            flash("Source not found", "error")
            return redirect(url_for("admin_polling"))

        display_name = source.display_name
        db.session.delete(source)
        db.session.commit()
        flash(f"Deleted polling source: {display_name}", "success")
        logger.info(f"Admin {current_user.id} deleted poll source {source_id}")
        return redirect(url_for("admin_polling"))

    @app.route("/admin/polling/<source_id>/logs")
    @login_required
    def admin_polling_logs(source_id):
        """View logs for a specific poll source."""
        denied = _require_admin("index")
        if denied:
            return denied

        source = PollSource.query.get(source_id)
        if not source:
            flash("Source not found", "error")
            return redirect(url_for("admin_polling"))

        logs = source.logs.limit(50).all()
        return render_template("admin_polling_logs.html", source=source, logs=logs)