#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
애니팜 투약지도서 API
- 동물약 PDF 생성 API
- 포트: 7002
"""

from flask import Flask, request, jsonify, send_file, render_template_string
from flask_cors import CORS
import os
import tempfile
import uuid
import sqlite3
from datetime import datetime

from animal_med.renderer_v2 import AnimalMedRendererV2

app = Flask(__name__)
CORS(app)

# 렌더러 인스턴스 (싱글톤)
renderer = AnimalMedRendererV2()

# 출력 디렉토리
OUTPUT_DIR = os.path.join(os.path.dirname(__file__), 'output')
os.makedirs(OUTPUT_DIR, exist_ok=True)

# ─────────────────────────────────────────────────────────────
# SQLite 접속 로그 DB
# ─────────────────────────────────────────────────────────────
LOGS_DB = os.path.join(os.path.dirname(__file__), 'lecture_logs.db')

def init_logs_db():
    """접속 로그 DB 초기화"""
    conn = sqlite3.connect(LOGS_DB)
    c = conn.cursor()
    c.execute('''
        CREATE TABLE IF NOT EXISTS lecture_views (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            lecture_id INTEGER NOT NULL,
            ip_address TEXT,
            user_agent TEXT,
            referer TEXT,
            viewed_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        )
    ''')
    c.execute('CREATE INDEX IF NOT EXISTS idx_lecture_id ON lecture_views(lecture_id)')
    c.execute('CREATE INDEX IF NOT EXISTS idx_viewed_at ON lecture_views(viewed_at)')
    conn.commit()
    conn.close()

def log_lecture_view(lecture_id, ip, user_agent, referer):
    """강의 조회 로깅"""
    try:
        conn = sqlite3.connect(LOGS_DB)
        c = conn.cursor()
        c.execute('''
            INSERT INTO lecture_views (lecture_id, ip_address, user_agent, referer)
            VALUES (?, ?, ?, ?)
        ''', (lecture_id, ip, user_agent[:500] if user_agent else None, referer[:500] if referer else None))
        conn.commit()
        conn.close()
    except Exception as e:
        print(f"[LOG ERROR] {e}")

# DB 초기화
init_logs_db()


@app.route('/health', methods=['GET'])
def health():
    """헬스체크"""
    return jsonify({
        'status': 'ok',
        'service': 'anipharm-api',
        'timestamp': datetime.now().isoformat()
    })


@app.route('/api/products', methods=['GET'])
def list_products():
    """등록된 약품 목록 조회"""
    products = renderer.list_drugs()
    return jsonify({
        'success': True,
        'count': len(products),
        'products': products
    })


@app.route('/api/guide/pdf', methods=['POST'])
def generate_pdf():
    """
    투약지도서 PDF 생성
    
    Request Body:
    {
        "product_ids": ["nexgard_spectra", "heartsaver", ...],
        "patient_name": "김남곤",
        "pet_name": "뽀삐",
        "pet_species": "푸들",
        "pet_age": "3세",
        "pharmacy_name": "청춘약국 동물약 전문상담",  // optional
        "pharmacy_tel": "033-481-0384"  // optional
    }
    
    Response: PDF 파일 (application/pdf)
    """
    try:
        data = request.get_json()
        
        if not data:
            return jsonify({'success': False, 'error': 'No JSON data'}), 400
        
        product_ids = data.get('product_ids', [])
        if not product_ids:
            return jsonify({'success': False, 'error': 'product_ids required'}), 400
        
        # 파일명 생성
        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
        filename = f"guide_{timestamp}_{uuid.uuid4().hex[:8]}.pdf"
        output_path = os.path.join(OUTPUT_DIR, filename)
        
        # PDF 생성
        result = renderer.render_to_pdf(
            product_ids=product_ids,
            output_path=output_path,
            patient_name=data.get('patient_name', '보호자'),
            pet_name=data.get('pet_name', '반려동물'),
            pet_species=data.get('pet_species', ''),
            pet_age=data.get('pet_age', ''),
            pharmacy_name=data.get('pharmacy_name', '청춘약국 동물약 전문상담'),
            pharmacy_tel=data.get('pharmacy_tel', '033-481-0384')
        )
        
        if result['success']:
            return send_file(
                output_path,
                mimetype='application/pdf',
                as_attachment=True,
                download_name=f"투약지도서_{timestamp}.pdf"
            )
        else:
            return jsonify({
                'success': False,
                'error': result.get('error', 'Unknown error')
            }), 500
            
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


@app.route('/api/guide/preview', methods=['POST'])
def preview_guide():
    """
    투약지도서 미리보기 (메타데이터만 반환)
    
    Request Body: generate_pdf와 동일
    Response: JSON (약품 정보 + 예상 페이지 수)
    """
    try:
        data = request.get_json()
        
        if not data:
            return jsonify({'success': False, 'error': 'No JSON data'}), 400
        
        product_ids = data.get('product_ids', [])
        if not product_ids:
            return jsonify({'success': False, 'error': 'product_ids required'}), 400
        
        # 약품 정보 조회
        drugs = []
        for pid in product_ids:
            drug = renderer.get_drug(pid)
            if drug:
                drugs.append({
                    'id': pid,
                    'name': drug.get('name'),
                    'category': drug.get('category'),
                    'has_image': bool(drug.get('image_url') or drug.get('apc_code'))
                })
        
        # 페이지 수 계산 (4개/페이지)
        page_count = (len(drugs) + 3) // 4
        
        return jsonify({
            'success': True,
            'drug_count': len(drugs),
            'page_count': page_count,
            'drugs': drugs
        })
        
    except Exception as e:
        return jsonify({
            'success': False,
            'error': str(e)
        }), 500


# ─────────────────────────────────────────────────────────────
# 동물약 강의 콘텐츠 라우트
# ─────────────────────────────────────────────────────────────
LECTURES_DIR = os.path.join(os.path.dirname(__file__), 'static', 'lectures')
os.makedirs(LECTURES_DIR, exist_ok=True)

@app.route('/lecture/<int:lecture_id>')
def serve_lecture(lecture_id):
    """동물약 강의 콘텐츠 서빙 (카카오톡 og 태그 포함) + 접속 로깅"""
    from flask import send_from_directory
    
    # 접속 로깅
    ip = request.headers.get('X-Forwarded-For', request.remote_addr)
    user_agent = request.headers.get('User-Agent', '')
    referer = request.headers.get('Referer', '')
    log_lecture_view(lecture_id, ip, user_agent, referer)
    
    filename = f'lecture_{lecture_id:02d}.html'
    return send_from_directory(LECTURES_DIR, filename)


# ─────────────────────────────────────────────────────────────
# 관리자 페이지 - 강의 접속 통계
# ─────────────────────────────────────────────────────────────
ADMIN_HTML = '''
<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>📊 강의 접속 통계 - 애니팜</title>
    <style>
        * { box-sizing: border-box; }
        body { font-family: 'Pretendard', -apple-system, sans-serif; background: #f5f7fa; margin: 0; padding: 20px; }
        .container { max-width: 1000px; margin: 0 auto; }
        h1 { color: #008BD5; margin-bottom: 30px; }
        .card { background: white; border-radius: 12px; padding: 24px; margin-bottom: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
        .card h2 { margin-top: 0; color: #333; font-size: 1.2em; border-bottom: 2px solid #008BD5; padding-bottom: 10px; }
        .stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 20px; }
        .stat-box { background: linear-gradient(135deg, #008BD5, #00a8e8); color: white; padding: 20px; border-radius: 10px; text-align: center; }
        .stat-box .number { font-size: 2.5em; font-weight: bold; }
        .stat-box .label { font-size: 0.9em; opacity: 0.9; }
        table { width: 100%; border-collapse: collapse; }
        th, td { padding: 12px; text-align: left; border-bottom: 1px solid #eee; }
        th { background: #f8f9fa; color: #666; font-weight: 600; }
        tr:hover { background: #f8f9fa; }
        .ip { font-family: monospace; color: #666; font-size: 0.9em; }
        .time { color: #888; font-size: 0.85em; }
        .ua { color: #999; font-size: 0.75em; max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .badge { display: inline-block; padding: 4px 10px; border-radius: 20px; font-size: 0.8em; font-weight: 600; }
        .badge-lecture { background: #e3f2fd; color: #1976d2; }
        .refresh-btn { background: #008BD5; color: white; border: none; padding: 10px 20px; border-radius: 8px; cursor: pointer; font-size: 1em; }
        .refresh-btn:hover { background: #0077b6; }
    </style>
</head>
<body>
    <div class="container">
        <h1>📊 강의 접속 통계</h1>
        
        <div class="stat-grid">
            <div class="stat-box">
                <div class="number">{{ total_views }}</div>
                <div class="label">총 조회수</div>
            </div>
            <div class="stat-box">
                <div class="number">{{ today_views }}</div>
                <div class="label">오늘 조회수</div>
            </div>
            <div class="stat-box">
                <div class="number">{{ unique_ips }}</div>
                <div class="label">순 방문자 (IP)</div>
            </div>
        </div>
        
        <div class="card">
            <h2>📈 강의별 조회수</h2>
            <table>
                <thead>
                    <tr><th>강의</th><th>조회수</th><th>최근 조회</th></tr>
                </thead>
                <tbody>
                {% for row in lecture_stats %}
                    <tr>
                        <td><span class="badge badge-lecture">Lecture {{ row[0] }}</span></td>
                        <td><strong>{{ row[1] }}</strong>회</td>
                        <td class="time">{{ row[2] }}</td>
                    </tr>
                {% endfor %}
                </tbody>
            </table>
        </div>
        
        <div class="card">
            <h2>🕐 최근 접속 로그 (50건)</h2>
            <table>
                <thead>
                    <tr><th>시간</th><th>강의</th><th>IP</th><th>Referer</th></tr>
                </thead>
                <tbody>
                {% for row in recent_logs %}
                    <tr>
                        <td class="time">{{ row[0] }}</td>
                        <td><span class="badge badge-lecture">Lecture {{ row[1] }}</span></td>
                        <td class="ip">{{ row[2] }}</td>
                        <td class="ua">{{ row[3] or '-' }}</td>
                    </tr>
                {% endfor %}
                </tbody>
            </table>
        </div>
        
        <button class="refresh-btn" onclick="location.reload()">🔄 새로고침</button>
    </div>
</body>
</html>
'''

@app.route('/admin/lectures')
def admin_lectures():
    """강의 접속 통계 관리자 페이지"""
    conn = sqlite3.connect(LOGS_DB)
    c = conn.cursor()
    
    # 총 조회수
    c.execute('SELECT COUNT(*) FROM lecture_views')
    total_views = c.fetchone()[0]
    
    # 오늘 조회수
    c.execute("SELECT COUNT(*) FROM lecture_views WHERE date(viewed_at) = date('now', 'localtime')")
    today_views = c.fetchone()[0]
    
    # 순 방문자 (unique IP)
    c.execute('SELECT COUNT(DISTINCT ip_address) FROM lecture_views')
    unique_ips = c.fetchone()[0]
    
    # 강의별 통계
    c.execute('''
        SELECT lecture_id, COUNT(*) as cnt, MAX(viewed_at) as last_view
        FROM lecture_views
        GROUP BY lecture_id
        ORDER BY cnt DESC
    ''')
    lecture_stats = c.fetchall()
    
    # 최근 로그 50건
    c.execute('''
        SELECT viewed_at, lecture_id, ip_address, referer
        FROM lecture_views
        ORDER BY viewed_at DESC
        LIMIT 50
    ''')
    recent_logs = c.fetchall()
    
    conn.close()
    
    return render_template_string(ADMIN_HTML,
        total_views=total_views,
        today_views=today_views,
        unique_ips=unique_ips,
        lecture_stats=lecture_stats,
        recent_logs=recent_logs
    )


if __name__ == '__main__':
    print("=" * 50)
    print("🐾 애니팜 투약지도서 API")
    print("=" * 50)
    print(f"📍 http://localhost:7002")
    print(f"📋 GET  /health - 헬스체크")
    print(f"📋 GET  /api/products - 약품 목록")
    print(f"📋 POST /api/guide/pdf - PDF 생성")
    print(f"📋 POST /api/guide/preview - 미리보기")
    print("=" * 50)
    
    app.run(host='0.0.0.0', port=7002, debug=False, threaded=True)