# ==========================================
# crawlers/sun_wms.py - Sun-WMS 크롤러 (6호기)
# HTML 테이블 파싱 방식
# ==========================================

import requests
import re
import time
from .base import create_session, safe_float

def fetch_data(plant_info):
    """
    Sun-WMS 발전소 데이터 수집
    """
    plant_id = plant_info.get('id', 'sunwms-06')
    auth = plant_info.get('auth', {})
    system = plant_info.get('system', {})
    company_name = plant_info.get('company_name', '태양과바람')
    plant_name = plant_info.get('name', '6호기')
    
    payload_id = auth.get('payload_id', '')
    payload_pw = auth.get('payload_pw', '')
    login_url = system.get('login_url', '')
    data_url = system.get('data_url', '')
    
    session = create_session()
    
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/120.0.0.0 Safari/537.36',
        'Referer': 'http://tb6.sun-wms.com/public/main/login.php',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    }

    # 1. 로그인
    login_data = {
        'act': 'loginChk',
        'user_id': payload_id,
        'user_pass': payload_pw
    }

    try:
        res = session.post(login_url, data=login_data, headers=headers)
        if res.status_code != 200:
            return []
    except Exception as e:
        print(f"❌ {plant_name} 접속 에러: {e}")
        return []

    # 2. 데이터 요청
    try:
        timestamp = int(time.time() * 1000)
        res = session.get(f"{data_url}?time={timestamp}", headers=headers)
        res.encoding = 'euc-kr'
        
        content = res.text
        
        match_kw = re.search(r"id=['\"]cur_power['\"].*?value=['\"]([^'\"]+)['\"]", content)
        curr_kw = float(match_kw.group(1)) if match_kw else 0.0
        
        match_today = re.search(r"id=['\"]today_power['\"].*?value=['\"]([^'\"]+)['\"]", content)
        today_kwh = float(match_today.group(1)) if match_today else 0.0
        
        status = "🟢 정상" if curr_kw > 0 else "💤 대기"
        
        return [{
            'id': plant_id,
            'name': f'{company_name} {plant_name}',
            'kw': curr_kw,
            'today': today_kwh,
            'status': status
        }]

    except Exception as e:
        print(f"❌ {plant_name} 에러: {e}")
        return []


def fetch_history_hourly(plant_info, start_date, end_date):
    """
    Sun-WMS 발전소의 시간대별 과거 데이터 수집
    
    실제 엔드포인트: /public/statics/statics.php (HTML 테이블 응답)
    파라미터: tab01=0&tab02=1&tab03=2&tord=1&s_day=YYYY-MM-DD
    """
    from datetime import datetime, timedelta
    
    results = []
    plant_id = plant_info.get('id', 'sunwms-06')
    auth = plant_info.get('auth', {})
    system = plant_info.get('system', {})
    plant_name = plant_info.get('name', '6호기')
    
    payload_id = auth.get('payload_id', '')
    payload_pw = auth.get('payload_pw', '')
    login_url = system.get('login_url', '')
    
    # base_url 추출
    base_url = system.get('base_url', '')
    statics_url = system.get('statics_url', f"{base_url}/public/statics/statics.php")
    
    session = create_session()
    
    print(f"\n{'='*60}")
    print(f"[Sun-WMS History] {plant_name} ({start_date} ~ {end_date})")
    print(f"{'='*60}")
    
    headers = {
        'User-Agent': 'Mozilla/5.0',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    }
    
    login_data = {'act': 'loginChk', 'user_id': payload_id, 'user_pass': payload_pw}
    
    try:
        res = session.post(login_url, data=login_data, headers=headers)
        if res.status_code == 200:
            print("  ✓ Login successful")
        else:
            print("  ✗ Login failed")
            return results
    except Exception as e:
        print(f"  ✗ Login error: {e}")
        return results
    
    # 날짜 반복
    current_date = datetime.strptime(start_date, '%Y-%m-%d')
    end_dt = datetime.strptime(end_date, '%Y-%m-%d')
    
    while current_date <= end_dt:
        date_str = current_date.strftime('%Y-%m-%d')
        
        # 실제 확인된 시간별 엔드포인트
        params = {
            'tab01': '0',
            'tab02': '1',
            'tab03': '2',
            'tord': '1',
            's_day': date_str
        }
        
        try:
            res = session.get(statics_url, params=params, headers=headers, timeout=10)
            res.encoding = 'euc-kr'
            
            if res.status_code == 200:
                # HTML 테이블 파싱
                html = res.text
                
                # <tbody> 안의 <tr> 태그 찾기
                tbody_match = re.search(r'<tbody>(.*?)</tbody>', html, re.DOTALL)
                if tbody_match:
                    tbody_content = tbody_match.group(1)
                    
                    # 각 <tr> 파싱
                    tr_pattern = r'<tr>\s*<td>(\d{2}):00</td>\s*<td>([\d.]+)</td>\s*</tr>'
                    matches = re.findall(tr_pattern, tbody_content)
                    
                    if matches:
                        print(f"  ✓ Found {len(matches)} hourly records")
                        
                        for hour, kwh in matches:
                            generation_kwh = safe_float(kwh)
                            timestamp = f"{date_str} {hour}:00:00"
                            
                            results.append({
                                'plant_id': plant_id,
                                'timestamp': timestamp,
                                'generation_kwh': generation_kwh,
                                'current_kw': 0
                            })
                    else:
                        print(f"  ⚠ No data for {date_str}")
                else:
                    print(f"  ⚠ No tbody found for {date_str}")
            else:
                print(f"  ✗ HTTP {res.status_code}")
                
        except Exception as e:
            print(f"  ✗ Error: {e}")
        
        current_date += timedelta(days=1)
    
    print(f"\n{'='*60}")
    print(f"[Total] Collected {len(results)} hourly records")
    print(f"{'='*60}\n")
    
    return results


def fetch_history_daily(plant_info, start_date, end_date):
    """
    Sun-WMS 발전소의 일별 과거 데이터 수집 (월 단위 분할)
    
    실제 엔드포인트: /public/statics/statics.php (HTML 테이블 응답)
    파라미터: tab01=0&tab02=2&tab03=2&tord=2&s_day=YYYY-MM-DD&e_day=YYYY-MM-DD
    """
    from datetime import datetime, timedelta
    from dateutil.relativedelta import relativedelta
    import calendar
    import re
    from .base import safe_float, create_session
    
    results = []
    plant_id = plant_info.get('id', 'sunwms-06')
    auth = plant_info.get('auth', {})
    system = plant_info.get('system', {})
    plant_name = plant_info.get('name', '6호기')
    
    payload_id = auth.get('payload_id', '')
    payload_pw = auth.get('payload_pw', '')
    login_url = system.get('login_url', '')
    base_url = system.get('base_url', '')
    statics_url = system.get('statics_url', f"{base_url}/public/statics/statics.php")
    
    session = create_session()
    
    print(f"\n{'='*60}")
    print(f"[Sun-WMS Daily] {plant_name} ({start_date} ~ {end_date}) - Looping by Month")
    print(f"{'='*60}")
    
    headers = {
        'User-Agent': 'Mozilla/5.0',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    }
    
    # 로그인
    try:
        login_data = {'act': 'loginChk', 'user_id': payload_id, 'user_pass': payload_pw}
        res = session.post(login_url, data=login_data, headers=headers)
        if res.status_code == 200:
            print("  ✓ Login successful")
        else:
            print("  ✗ Login failed")
            return results
    except Exception as e:
        print(f"  ✗ Login error: {e}")
        return results
    
    # 월 단위 루프 적용
    start_dt = datetime.strptime(start_date, '%Y-%m-%d')
    end_dt = datetime.strptime(end_date, '%Y-%m-%d')
    
    loop_start = start_dt
    
    while loop_start <= end_dt:
        # 현재 달의 마지막 날 계산
        last_day_of_month = calendar.monthrange(loop_start.year, loop_start.month)[1]
        loop_end = loop_start.replace(day=last_day_of_month)
        
        # 종료일이 전체 종료일보다 뒤면 조정
        if loop_end > end_dt:
            loop_end = end_dt
            
        s_str = loop_start.strftime('%Y-%m-%d')
        e_str = loop_end.strftime('%Y-%m-%d')
        
        print(f"  [Fetching] {s_str} ~ {e_str} ...", end="", flush=True)
        
        params = {
            'tab01': '0',
            'tab02': '2',
            'tab03': '2',
            'tord': '2',
            's_day': s_str,
            'e_day': e_str
        }
        
        try:
            res = session.get(statics_url, params=params, headers=headers, timeout=15)
            res.encoding = 'euc-kr'
            
            if res.status_code == 200:
                html = res.text
                tbody_match = re.search(r'<tbody>(.*?)</tbody>', html, re.DOTALL)
                
                if tbody_match:
                    tbody_content = tbody_match.group(1)
                    tr_pattern = r'<tr>\s*<td>(\d{4}-\d{2}-\d{2})</td>\s*<td>([\d.]+)</td>'
                    matches = re.findall(tr_pattern, tbody_content)
                    
                    if matches:
                        count = 0
                        for date_str, kwh in matches:
                            generation_kwh = safe_float(kwh)
                            results.append({
                                'plant_id': plant_id,
                                'date': date_str,
                                'generation_kwh': generation_kwh,
                                'current_kw': 0
                            })
                            count += 1
                        print(f" OK ({count} days)")
                    else:
                        print(" No data")
                else:
                    print(" No tbody")
            else:
                 print(f" HTTP {res.status_code}")
                 
        except Exception as e:
            print(f" Error: {e}")
        
        # 다음 기간 설정
        loop_start = loop_end + timedelta(days=1)
    
    print(f"\n[Total] Collected {len(results)} daily records\n")
    return results


def fetch_history_monthly(plant_info, start_month, end_month):
    """
    Sun-WMS 발전소의 월별 과거 데이터 수집
    
    실제 엔드포인트: /public/statics/statics.php (HTML 테이블 응답)
    ⚠️ 월별 데이터는 일별 데이터를 월별로 집계
    """
    from datetime import datetime
    from dateutil.relativedelta import relativedelta
    
    results = []
    plant_id = plant_info.get('id', 'sunwms-06')
    auth = plant_info.get('auth', {})
    system = plant_info.get('system', {})
    plant_name = plant_info.get('name', '6호기')
    
    # 시작일자 체크
    plant_start_date = plant_info.get('start_date', '2019-12-30')
    plant_start_month = plant_start_date[:7]  # YYYY-MM
    
    # 실제 시작 월은 발전소 가동일 이후로 제한
    if start_month < plant_start_month:
        actual_start = plant_start_month
        print(f"  ℹ 발전소 가동일({plant_start_date}) 이후부터 수집: {actual_start}")
    else:
        actual_start = start_month
    
    payload_id = auth.get('payload_id', '')
    payload_pw = auth.get('payload_pw', '')
    login_url = system.get('login_url', '')
    
    # base_url 추출
    base_url = system.get('base_url', '')
    statics_url = system.get('statics_url', f"{base_url}/public/statics/statics.php")
    
    session = create_session()
    
    print(f"\n{'='*60}")
    print(f"[Sun-WMS Monthly] {plant_name} ({actual_start} ~ {end_month})")
    print(f"{'='*60}")
    
    headers = {
        'User-Agent': 'Mozilla/5.0',
        'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
    }
    
    login_data = {'act': 'loginChk', 'user_id': payload_id, 'user_pass': payload_pw}
    
    try:
        res = session.post(login_url, data=login_data, headers=headers)
        if res.status_code == 200:
            print("  ✓ Login successful")
        else:
            print("  ✗ Login failed")
            return results
    except Exception as e:
        print(f"  ✗ Login error: {e}")
        return results
    
    # 월 단위로 반복
    current_month = datetime.strptime(actual_start, '%Y-%m')
    end_month_dt = datetime.strptime(end_month, '%Y-%m')
    
    while current_month <= end_month_dt:
        month_str = current_month.strftime('%Y-%m')
        
        # 해당 월의 시작일과 마지막일
        first_day = current_month.strftime('%Y-%m-01')
        if current_month.month == 12:
            last_day = current_month.replace(day=31).strftime('%Y-%m-%d')
        else:
            next_month = current_month + relativedelta(months=1)
            last_day = (next_month - relativedelta(days=1)).strftime('%Y-%m-%d')
        
        # 일별 엔드포인트로 한 달치 데이터 수집해서 합산
        params = {
            'tab01': '0',
            'tab02': '2',
            'tab03': '2',
            'tord': '2',
            's_day': first_day,
            'e_day': last_day
        }
        
        try:
            res = session.get(statics_url, params=params, headers=headers, timeout=10)
            res.encoding = 'euc-kr'
            
            if res.status_code == 200:
                # HTML 테이블 파싱
                html = res.text
                
                # <tbody> 안의 <tr> 태그 찾기
                tbody_match = re.search(r'<tbody>(.*?)</tbody>', html, re.DOTALL)
                if tbody_match:
                    tbody_content = tbody_match.group(1)
                    
                    # 각 <tr> 파싱 (날짜와 발전량)
                    tr_pattern = r'<tr>\s*<td>(\d{4}-\d{2}-\d{2})</td>\s*<td>([\d.]+)</td>'
                    matches = re.findall(tr_pattern, tbody_content)
                    
                    if matches:
                        # 일별 데이터를 합산
                        monthly_total = sum([safe_float(kwh) for _, kwh in matches])
                        
                        results.append({
                            'plant_id': plant_id,
                            'month': month_str,
                            'generation_kwh': monthly_total
                        })
                        print(f"  ✓ {month_str}: {monthly_total:.1f}kWh (from {len(matches)} days)")
                    else:
                        print(f"  ⚠ No data for {month_str}")
        except Exception as e:
            print(f"  ✗ Error for {month_str}: {e}")
        
        # 다음 달로
        current_month += relativedelta(months=1)
    
    print(f"[Total] Collected {len(results)} monthly records\n")
    return results