from flask import Blueprint, render_template, request, redirect, url_for, session, flash, jsonify, send_file
from app.models.models import Token, Submission, Settings
from app import db
from app.analyzer import get_analyzer
from functools import wraps
import json
import csv
import io
from datetime import datetime
import os

bp = Blueprint('admin', __name__, url_prefix='/admin')

CONTRIBUTOR_TYPES = [
    {'value': 'government', 'label': 'Government Officer', 'description': 'Public sector representatives'},
    {'value': 'community', 'label': 'Community Member', 'description': 'Local residents and community leaders'},
    {'value': 'industry', 'label': 'Industry Representative', 'description': 'Business and industry stakeholders'},
    {'value': 'ngo', 'label': 'NGO/Non-Profit', 'description': 'Civil society organizations'},
    {'value': 'academic', 'label': 'Academic/Researcher', 'description': 'Universities and research institutions'},
    {'value': 'other', 'label': 'Other Stakeholder', 'description': 'Other interested parties'}
]

CATEGORIES = ['Vision', 'Problem', 'Objectives', 'Directives', 'Values', 'Actions']

def admin_required(f):
    @wraps(f)
    def decorated_function(*args, **kwargs):
        if 'token' not in session or session.get('type') != 'admin':
            return redirect(url_for('auth.login'))
        return f(*args, **kwargs)
    return decorated_function

@bp.route('/overview')
@admin_required
def overview():
    total_submissions = Submission.query.count()
    total_tokens = Token.query.filter(Token.type != 'admin').count()
    flagged_count = Submission.query.filter_by(flagged_as_offensive=True).count()
    unanalyzed_count = Submission.query.filter_by(category=None).count()

    submission_open = Settings.get_setting('submission_open', 'true') == 'true'
    token_generation_enabled = Settings.get_setting('token_generation_enabled', 'true') == 'true'

    analyzed = Submission.query.filter(Submission.category != None).count() > 0

    return render_template('admin/overview.html',
                         total_submissions=total_submissions,
                         total_tokens=total_tokens,
                         flagged_count=flagged_count,
                         unanalyzed_count=unanalyzed_count,
                         submission_open=submission_open,
                         token_generation_enabled=token_generation_enabled,
                         analyzed=analyzed)

@bp.route('/registration')
@admin_required
def registration():
    token_generation_enabled = Settings.get_setting('token_generation_enabled', 'true') == 'true'
    recent_tokens = Token.query.filter(Token.type != 'admin').order_by(Token.created_at.desc()).limit(10).all()

    registration_url = request.host_url.rstrip('/') + url_for('auth.generate')

    return render_template('admin/registration.html',
                         token_generation_enabled=token_generation_enabled,
                         recent_tokens=recent_tokens,
                         registration_url=registration_url)

@bp.route('/tokens')
@admin_required
def tokens():
    all_tokens = Token.query.all()
    return render_template('admin/tokens.html',
                         tokens=all_tokens,
                         contributor_types=CONTRIBUTOR_TYPES)

@bp.route('/submissions')
@admin_required
def submissions():
    category_filter = request.args.get('category', 'all')
    flagged_only = request.args.get('flagged', 'false') == 'true'

    query = Submission.query

    if category_filter != 'all':
        query = query.filter_by(category=category_filter)

    if flagged_only:
        query = query.filter_by(flagged_as_offensive=True)

    all_submissions = query.order_by(Submission.timestamp.desc()).all()
    flagged_count = Submission.query.filter_by(flagged_as_offensive=True).count()

    analyzed = Submission.query.filter(Submission.category != None).count() > 0

    return render_template('admin/submissions.html',
                         submissions=all_submissions,
                         categories=CATEGORIES,
                         category_filter=category_filter,
                         flagged_only=flagged_only,
                         flagged_count=flagged_count,
                         analyzed=analyzed)

@bp.route('/dashboard')
@admin_required
def dashboard():
    # Check if analyzed
    analyzed = Submission.query.filter(Submission.category != None).count() > 0

    if not analyzed:
        flash('Please analyze submissions first', 'warning')
        return redirect(url_for('admin.overview'))

    submissions = Submission.query.filter(Submission.category != None).all()

    # Contributor stats
    contributor_stats = db.session.query(
        Submission.contributor_type,
        db.func.count(Submission.id)
    ).group_by(Submission.contributor_type).all()

    # Category stats
    category_stats = db.session.query(
        Submission.category,
        db.func.count(Submission.id)
    ).filter(Submission.category != None).group_by(Submission.category).all()

    # Geotagged submissions
    geotagged_submissions = Submission.query.filter(
        Submission.latitude != None,
        Submission.longitude != None,
        Submission.category != None
    ).all()

    # Category breakdown by contributor type
    breakdown = {}
    for cat in CATEGORIES:
        breakdown[cat] = {}
        for ctype in CONTRIBUTOR_TYPES:
            count = Submission.query.filter_by(
                category=cat,
                contributor_type=ctype['value']
            ).count()
            breakdown[cat][ctype['value']] = count

    return render_template('admin/dashboard.html',
                         submissions=submissions,
                         contributor_stats=contributor_stats,
                         category_stats=category_stats,
                         geotagged_submissions=geotagged_submissions,
                         categories=CATEGORIES,
                         contributor_types=CONTRIBUTOR_TYPES,
                         breakdown=breakdown)

# API Endpoints

@bp.route('/api/toggle-submissions', methods=['POST'])
@admin_required
def toggle_submissions():
    current = Settings.get_setting('submission_open', 'true')
    new_value = 'false' if current == 'true' else 'true'
    Settings.set_setting('submission_open', new_value)
    return jsonify({'success': True, 'submission_open': new_value == 'true'})

@bp.route('/api/toggle-token-generation', methods=['POST'])
@admin_required
def toggle_token_generation():
    current = Settings.get_setting('token_generation_enabled', 'true')
    new_value = 'false' if current == 'true' else 'true'
    Settings.set_setting('token_generation_enabled', new_value)
    return jsonify({'success': True, 'token_generation_enabled': new_value == 'true'})

@bp.route('/api/create-token', methods=['POST'])
@admin_required
def create_token():
    data = request.json
    contributor_type = data.get('type')
    name = data.get('name', '').strip()

    if not contributor_type or contributor_type not in [t['value'] for t in CONTRIBUTOR_TYPES]:
        return jsonify({'success': False, 'error': 'Invalid contributor type'}), 400

    import random
    import string

    prefix = contributor_type[:3].upper()
    random_part = ''.join(random.choices(string.ascii_uppercase + string.digits, k=6))
    timestamp_part = str(int(datetime.now().timestamp()))[-4:]
    token_str = f"{prefix}-{random_part}{timestamp_part}"

    final_name = name if name else f"{contributor_type.capitalize()} User"

    new_token = Token(
        token=token_str,
        type=contributor_type,
        name=final_name
    )

    db.session.add(new_token)
    db.session.commit()

    return jsonify({'success': True, 'token': new_token.to_dict()})

@bp.route('/api/delete-token/<int:token_id>', methods=['DELETE'])
@admin_required
def delete_token(token_id):
    token = Token.query.get_or_404(token_id)

    if token.token == 'ADMIN123':
        return jsonify({'success': False, 'error': 'Cannot delete admin token'}), 400

    db.session.delete(token)
    db.session.commit()

    return jsonify({'success': True})

@bp.route('/api/update-category/<int:submission_id>', methods=['POST'])
@admin_required
def update_category(submission_id):
    submission = Submission.query.get_or_404(submission_id)
    data = request.json
    category = data.get('category')

    # Validate category
    if category and category not in CATEGORIES:
        return jsonify({'success': False, 'error': 'Invalid category'}), 400

    submission.category = category
    db.session.commit()
    return jsonify({'success': True, 'category': category})

@bp.route('/api/toggle-flag/<int:submission_id>', methods=['POST'])
@admin_required
def toggle_flag(submission_id):
    submission = Submission.query.get_or_404(submission_id)
    submission.flagged_as_offensive = not submission.flagged_as_offensive
    db.session.commit()
    return jsonify({'success': True, 'flagged': submission.flagged_as_offensive})

@bp.route('/api/delete-submission/<int:submission_id>', methods=['DELETE'])
@admin_required
def delete_submission(submission_id):
    submission = Submission.query.get_or_404(submission_id)
    db.session.delete(submission)
    db.session.commit()
    return jsonify({'success': True})

@bp.route('/api/analyze', methods=['POST'])
@admin_required
def analyze_submissions():
    data = request.json
    analyze_all = data.get('analyze_all', False)

    # Get submissions to analyze
    if analyze_all:
        to_analyze = Submission.query.all()
    else:
        to_analyze = Submission.query.filter_by(category=None).all()

    if not to_analyze:
        return jsonify({'success': False, 'error': 'No submissions to analyze'}), 400

    # Get the analyzer instance
    analyzer = get_analyzer()

    success_count = 0
    error_count = 0

    for submission in to_analyze:
        try:
            # Use the free Hugging Face model for classification
            category = analyzer.analyze(submission.message)
            submission.category = category
            success_count += 1

        except Exception as e:
            print(f"Error analyzing submission {submission.id}: {e}")
            error_count += 1
            continue

    db.session.commit()

    return jsonify({
        'success': True,
        'analyzed': success_count,
        'errors': error_count
    })

@bp.route('/export/json')
@admin_required
def export_json():
    data = {
        'tokens': [t.to_dict() for t in Token.query.all()],
        'submissions': [s.to_dict() for s in Submission.query.all()],
        'submissionOpen': Settings.get_setting('submission_open', 'true') == 'true',
        'tokenGenerationEnabled': Settings.get_setting('token_generation_enabled', 'true') == 'true',
        'exportDate': datetime.utcnow().isoformat()
    }

    json_str = json.dumps(data, indent=2)

    buffer = io.BytesIO()
    buffer.write(json_str.encode('utf-8'))
    buffer.seek(0)

    return send_file(
        buffer,
        mimetype='application/json',
        as_attachment=True,
        download_name=f'participatory-planning-{datetime.now().strftime("%Y-%m-%d")}.json'
    )

@bp.route('/export/csv')
@admin_required
def export_csv():
    submissions = Submission.query.all()

    output = io.StringIO()
    writer = csv.writer(output)

    # Header
    writer.writerow(['Timestamp', 'Contributor Type', 'Category', 'Message', 'Latitude', 'Longitude', 'Flagged'])

    # Rows
    for s in submissions:
        writer.writerow([
            s.timestamp.isoformat() if s.timestamp else '',
            s.contributor_type,
            s.category or 'Not analyzed',
            s.message,
            s.latitude or '',
            s.longitude or '',
            'Yes' if s.flagged_as_offensive else 'No'
        ])

    buffer = io.BytesIO()
    buffer.write(output.getvalue().encode('utf-8'))
    buffer.seek(0)

    return send_file(
        buffer,
        mimetype='text/csv',
        as_attachment=True,
        download_name=f'contributions-{datetime.now().strftime("%Y-%m-%d")}.csv'
    )

@bp.route('/import', methods=['POST'])
@admin_required
def import_data():
    if 'file' not in request.files:
        return jsonify({'success': False, 'error': 'No file uploaded'}), 400

    file = request.files['file']

    if file.filename == '':
        return jsonify({'success': False, 'error': 'No file selected'}), 400

    try:
        data = json.load(file)

        # Clear existing data (except admin token)
        Submission.query.delete()
        Token.query.filter(Token.token != 'ADMIN123').delete()

        # Import tokens
        for token_data in data.get('tokens', []):
            if token_data['token'] != 'ADMIN123':  # Skip admin token as it already exists
                token = Token(
                    token=token_data['token'],
                    type=token_data['type'],
                    name=token_data['name']
                )
                db.session.add(token)

        # Import submissions
        for sub_data in data.get('submissions', []):
            location = sub_data.get('location')
            submission = Submission(
                message=sub_data['message'],
                contributor_type=sub_data['contributorType'],
                latitude=location['lat'] if location else None,
                longitude=location['lng'] if location else None,
                timestamp=datetime.fromisoformat(sub_data['timestamp']) if sub_data.get('timestamp') else datetime.utcnow(),
                category=sub_data.get('category'),
                flagged_as_offensive=sub_data.get('flaggedAsOffensive', False)
            )
            db.session.add(submission)

        # Import settings
        Settings.set_setting('submission_open', 'true' if data.get('submissionOpen', True) else 'false')
        Settings.set_setting('token_generation_enabled', 'true' if data.get('tokenGenerationEnabled', True) else 'false')

        db.session.commit()

        return jsonify({'success': True})

    except Exception as e:
        db.session.rollback()
        return jsonify({'success': False, 'error': str(e)}), 500