"""
Admin API endpoints for pounce administration.

Provides admin-only access to:
- User management
- TLD price scraping
- System statistics
- Newsletter management
- Domain/Portfolio overview
"""
from datetime import datetime, timedelta
from typing import Optional
from fastapi import APIRouter, HTTPException, status, BackgroundTasks, Depends
from pydantic import BaseModel, EmailStr
from sqlalchemy import select, func, desc

from app.api.deps import Database, get_current_user
from app.models.user import User
from app.models.subscription import Subscription, SubscriptionTier, SubscriptionStatus, TIER_CONFIG
from app.models.domain import Domain
from app.models.portfolio import PortfolioDomain
from app.models.newsletter import NewsletterSubscriber
from app.models.tld_price import TLDPrice, TLDInfo
from app.models.auction import DomainAuction
from app.models.price_alert import PriceAlert

router = APIRouter()


# ============== Admin Authentication ==============

async def require_admin(
    current_user: User = Depends(get_current_user),
) -> User:
    """Dependency that requires admin privileges."""
    if not current_user.is_admin:
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Admin privileges required"
        )
    return current_user


# ============== Dashboard Stats ==============

@router.get("/stats")
async def get_admin_stats(
    db: Database,
    admin: User = Depends(require_admin)
):
    """Get comprehensive admin dashboard statistics."""
    
    # User stats
    total_users = await db.execute(select(func.count(User.id)))
    total_users = total_users.scalar()
    
    active_users = await db.execute(
        select(func.count(User.id)).where(User.is_active == True)
    )
    active_users = active_users.scalar()
    
    verified_users = await db.execute(
        select(func.count(User.id)).where(User.is_verified == True)
    )
    verified_users = verified_users.scalar()
    
    # New users last 7 days
    week_ago = datetime.utcnow() - timedelta(days=7)
    new_users_week = await db.execute(
        select(func.count(User.id)).where(User.created_at >= week_ago)
    )
    new_users_week = new_users_week.scalar()
    
    # Subscription stats
    subscriptions_by_tier = {}
    for tier in SubscriptionTier:
        count = await db.execute(
            select(func.count(Subscription.id)).where(
                Subscription.tier == tier,
                Subscription.status == SubscriptionStatus.ACTIVE
            )
        )
        subscriptions_by_tier[tier.value] = count.scalar()
    
    # Domain stats
    total_domains = await db.execute(select(func.count(Domain.id)))
    total_domains = total_domains.scalar()
    
    total_portfolio = await db.execute(select(func.count(PortfolioDomain.id)))
    total_portfolio = total_portfolio.scalar()
    
    # TLD stats
    total_tlds = await db.execute(select(func.count(func.distinct(TLDPrice.tld))))
    total_tlds = total_tlds.scalar()
    
    total_price_records = await db.execute(select(func.count(TLDPrice.id)))
    total_price_records = total_price_records.scalar()
    
    # Newsletter stats
    newsletter_subscribers = await db.execute(
        select(func.count(NewsletterSubscriber.id)).where(NewsletterSubscriber.is_active == True)
    )
    newsletter_subscribers = newsletter_subscribers.scalar()
    
    # Auction stats
    total_auctions = await db.execute(select(func.count(DomainAuction.id)))
    total_auctions = total_auctions.scalar()
    
    # Price alerts
    total_alerts = await db.execute(
        select(func.count(PriceAlert.id)).where(PriceAlert.is_active == True)
    )
    total_alerts = total_alerts.scalar()
    
    return {
        "users": {
            "total": total_users,
            "active": active_users,
            "verified": verified_users,
            "new_this_week": new_users_week,
        },
        "subscriptions": subscriptions_by_tier,
        "domains": {
            "watched": total_domains,
            "portfolio": total_portfolio,
        },
        "tld_data": {
            "unique_tlds": total_tlds,
            "price_records": total_price_records,
        },
        "newsletter_subscribers": newsletter_subscribers,
        "auctions": total_auctions,
        "price_alerts": total_alerts,
    }


# ============== User Management ==============

class UpdateUserRequest(BaseModel):
    """Schema for updating user."""
    name: Optional[str] = None
    is_active: Optional[bool] = None
    is_verified: Optional[bool] = None
    is_admin: Optional[bool] = None


class UpgradeUserRequest(BaseModel):
    """Request schema for upgrading a user."""
    email: EmailStr
    tier: str  # scout, trader, tycoon


@router.get("/users")
async def list_users(
    db: Database,
    admin: User = Depends(require_admin),
    limit: int = 50,
    offset: int = 0,
    search: Optional[str] = None,
):
    """List all users with pagination and search."""
    query = select(User).order_by(desc(User.created_at))
    
    if search:
        query = query.where(
            User.email.ilike(f"%{search}%") | 
            User.name.ilike(f"%{search}%")
        )
    
    query = query.offset(offset).limit(limit)
    result = await db.execute(query)
    users = result.scalars().all()
    
    # Get total count
    count_query = select(func.count(User.id))
    if search:
        count_query = count_query.where(
            User.email.ilike(f"%{search}%") | 
            User.name.ilike(f"%{search}%")
        )
    total = await db.execute(count_query)
    total = total.scalar()
    
    user_list = []
    for user in users:
        # Get subscription
        sub_result = await db.execute(
            select(Subscription).where(Subscription.user_id == user.id)
        )
        subscription = sub_result.scalar_one_or_none()
        
        # Get domain count
        domain_count = await db.execute(
            select(func.count(Domain.id)).where(Domain.user_id == user.id)
        )
        domain_count = domain_count.scalar()
        
        user_list.append({
            "id": user.id,
            "email": user.email,
            "name": user.name,
            "is_active": user.is_active,
            "is_verified": user.is_verified,
            "is_admin": user.is_admin,
            "created_at": user.created_at.isoformat(),
            "last_login": user.last_login.isoformat() if user.last_login else None,
            "domain_count": domain_count,
            "subscription": {
                "tier": subscription.tier.value if subscription else "scout",
                "tier_name": TIER_CONFIG.get(subscription.tier, {}).get("name", "Scout") if subscription else "Scout",
                "status": subscription.status.value if subscription else None,
                "domain_limit": subscription.domain_limit if subscription else 5,
            } if subscription else {
                "tier": "scout",
                "tier_name": "Scout",
                "status": None,
                "domain_limit": 5,
            },
        })
    
    return {
        "users": user_list,
        "total": total,
        "limit": limit,
        "offset": offset,
    }


# ============== User Export ==============
# NOTE: This must come BEFORE /users/{user_id} to avoid route conflict

@router.get("/users/export")
async def export_users_csv(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Export all users as CSV data."""
    import csv
    import io
    
    result = await db.execute(select(User).order_by(User.created_at))
    users_list = result.scalars().all()
    
    # Create CSV
    output = io.StringIO()
    writer = csv.writer(output)
    
    # Header
    writer.writerow([
        "ID", "Email", "Name", "Active", "Verified", "Admin",
        "Created At", "Last Login", "Tier", "Domain Limit", "Domains Used"
    ])
    
    for user in users_list:
        # Get subscription
        sub_result = await db.execute(
            select(Subscription).where(Subscription.user_id == user.id)
        )
        subscription = sub_result.scalar_one_or_none()
        
        # Get domain count
        domain_count = await db.execute(
            select(func.count(Domain.id)).where(Domain.user_id == user.id)
        )
        domain_count = domain_count.scalar()
        
        writer.writerow([
            user.id,
            user.email,
            user.name or "",
            "Yes" if user.is_active else "No",
            "Yes" if user.is_verified else "No",
            "Yes" if user.is_admin else "No",
            user.created_at.strftime("%Y-%m-%d %H:%M"),
            user.last_login.strftime("%Y-%m-%d %H:%M") if user.last_login else "",
            subscription.tier.value if subscription else "scout",
            subscription.domain_limit if subscription else 5,
            domain_count,
        ])
    
    return {
        "csv": output.getvalue(),
        "count": len(users_list),
        "exported_at": datetime.utcnow().isoformat(),
    }


@router.get("/users/{user_id}")
async def get_user(
    user_id: int,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Get detailed user information."""
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    # Get subscription
    sub_result = await db.execute(
        select(Subscription).where(Subscription.user_id == user.id)
    )
    subscription = sub_result.scalar_one_or_none()
    
    # Get domains
    domains_result = await db.execute(
        select(Domain).where(Domain.user_id == user.id)
    )
    domains = domains_result.scalars().all()
    
    # Get portfolio
    portfolio_result = await db.execute(
        select(PortfolioDomain).where(PortfolioDomain.user_id == user.id)
    )
    portfolio = portfolio_result.scalars().all()
    
    return {
        "id": user.id,
        "email": user.email,
        "name": user.name,
        "is_active": user.is_active,
        "is_verified": user.is_verified,
        "is_admin": user.is_admin,
        "stripe_customer_id": user.stripe_customer_id,
        "created_at": user.created_at.isoformat(),
        "updated_at": user.updated_at.isoformat(),
        "last_login": user.last_login.isoformat() if user.last_login else None,
        "subscription": {
            "tier": subscription.tier.value if subscription else None,
            "status": subscription.status.value if subscription else None,
            "domain_limit": subscription.domain_limit if subscription else 0,
            "stripe_subscription_id": subscription.stripe_subscription_id if subscription else None,
        } if subscription else None,
        "domains": [
            {
                "id": d.id,
                "domain": d.domain,
                "status": d.status,
                "created_at": d.created_at.isoformat(),
            }
            for d in domains
        ],
        "portfolio": [
            {
                "id": p.id,
                "domain": p.domain,
                "purchase_price": p.purchase_price,
                "estimated_value": p.estimated_value,
            }
            for p in portfolio
        ],
    }


@router.patch("/users/{user_id}")
async def update_user(
    user_id: int,
    request: UpdateUserRequest,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Update user details."""
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    if request.name is not None:
        user.name = request.name
    if request.is_active is not None:
        user.is_active = request.is_active
    if request.is_verified is not None:
        user.is_verified = request.is_verified
    if request.is_admin is not None:
        user.is_admin = request.is_admin
    
    await db.commit()
    await db.refresh(user)
    
    return {"message": f"User {user.email} updated", "user_id": user.id}


@router.delete("/users/{user_id}")
async def delete_user(
    user_id: int,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Delete a user and all their data."""
    from app.models.blog import BlogPost
    from app.models.admin_log import AdminActivityLog
    
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    if user.is_admin:
        raise HTTPException(status_code=400, detail="Cannot delete admin user")
    
    user_email = user.email
    
    # Delete user's blog posts (or set author_id to NULL if you want to keep them)
    await db.execute(
        BlogPost.__table__.delete().where(BlogPost.author_id == user_id)
    )
    
    # Delete user's admin activity logs (if any)
    await db.execute(
        AdminActivityLog.__table__.delete().where(AdminActivityLog.admin_id == user_id)
    )
    
    # Now delete the user (cascades to domains, subscriptions, portfolio, price_alerts)
    await db.delete(user)
    await db.commit()
    
    # Log this action
    await log_admin_activity(
        db, admin.id, "user_delete",
        f"Deleted user {user_email} and all their data"
    )
    
    return {"message": f"User {user_email} and all their data have been deleted"}


@router.post("/users/{user_id}/upgrade")
async def upgrade_user(
    user_id: int,
    tier: str,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Upgrade a user's subscription tier."""
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    # Validate tier
    try:
        new_tier = SubscriptionTier(tier)
    except ValueError:
        raise HTTPException(
            status_code=400,
            detail=f"Invalid tier: {tier}. Valid: scout, trader, tycoon"
        )
    
    # Find or create subscription
    sub_result = await db.execute(
        select(Subscription).where(Subscription.user_id == user.id)
    )
    subscription = sub_result.scalar_one_or_none()
    
    config = TIER_CONFIG.get(new_tier, {})
    
    if not subscription:
        subscription = Subscription(
            user_id=user.id,
            tier=new_tier,
            status=SubscriptionStatus.ACTIVE,
            domain_limit=config.get("domain_limit", 5),
        )
        db.add(subscription)
    else:
        subscription.tier = new_tier
        subscription.domain_limit = config.get("domain_limit", 5)
        subscription.status = SubscriptionStatus.ACTIVE
    
    await db.commit()
    
    return {
        "message": f"User {user.email} upgraded to {config.get('name', tier)}",
        "tier": new_tier.value,
    }


# ============== Newsletter Management ==============

@router.get("/newsletter")
async def list_newsletter_subscribers(
    db: Database,
    admin: User = Depends(require_admin),
    limit: int = 100,
    offset: int = 0,
    active_only: bool = True,
):
    """List newsletter subscribers."""
    query = select(NewsletterSubscriber).order_by(desc(NewsletterSubscriber.subscribed_at))
    
    if active_only:
        query = query.where(NewsletterSubscriber.is_active == True)
    
    query = query.offset(offset).limit(limit)
    result = await db.execute(query)
    subscribers = result.scalars().all()
    
    # Total count
    count_query = select(func.count(NewsletterSubscriber.id))
    if active_only:
        count_query = count_query.where(NewsletterSubscriber.is_active == True)
    total = await db.execute(count_query)
    total = total.scalar()
    
    return {
        "subscribers": [
            {
                "id": s.id,
                "email": s.email,
                "is_active": s.is_active,
                "subscribed_at": s.subscribed_at.isoformat(),
                "unsubscribed_at": s.unsubscribed_at.isoformat() if s.unsubscribed_at else None,
            }
            for s in subscribers
        ],
        "total": total,
    }


@router.get("/newsletter/export")
async def export_newsletter_emails(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Export all active newsletter emails (for external tools)."""
    result = await db.execute(
        select(NewsletterSubscriber.email).where(NewsletterSubscriber.is_active == True)
    )
    emails = [row[0] for row in result.fetchall()]
    
    return {
        "emails": emails,
        "count": len(emails),
    }


# ============== TLD Management ==============

@router.post("/scrape-tld-prices")
async def trigger_tld_scrape(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Manually trigger a TLD price scrape."""
    from app.services.tld_scraper.aggregator import tld_aggregator
    
    result = await tld_aggregator.run_scrape(db)
    
    return {
        "message": "TLD price scrape completed",
        "status": result.status,
        "tlds_scraped": result.tlds_scraped,
        "prices_saved": result.prices_saved,
        "sources_succeeded": result.sources_succeeded,
        "sources_attempted": result.sources_attempted,
        "errors": result.errors,
        "started_at": result.started_at.isoformat(),
        "completed_at": result.completed_at.isoformat() if result.completed_at else None,
    }


@router.get("/tld-prices/stats")
async def get_tld_price_stats(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Get TLD price data statistics."""
    # Total records
    total = await db.execute(select(func.count(TLDPrice.id)))
    total_records = total.scalar()
    
    # Unique TLDs
    tlds = await db.execute(select(func.count(func.distinct(TLDPrice.tld))))
    unique_tlds = tlds.scalar()
    
    # Unique registrars
    registrars = await db.execute(select(func.count(func.distinct(TLDPrice.registrar))))
    unique_registrars = registrars.scalar()
    
    # Latest record
    latest = await db.execute(
        select(TLDPrice.recorded_at).order_by(desc(TLDPrice.recorded_at)).limit(1)
    )
    latest_record = latest.scalar()
    
    # Oldest record
    oldest = await db.execute(
        select(TLDPrice.recorded_at).order_by(TLDPrice.recorded_at.asc()).limit(1)
    )
    oldest_record = oldest.scalar()
    
    return {
        "total_records": total_records,
        "unique_tlds": unique_tlds,
        "unique_registrars": unique_registrars,
        "latest_record": latest_record.isoformat() if latest_record else None,
        "oldest_record": oldest_record.isoformat() if oldest_record else None,
        "data_range_days": (latest_record - oldest_record).days if latest_record and oldest_record else 0,
    }


# ============== System ==============

@router.get("/system/health")
async def system_health(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Check system health."""
    # Test database
    try:
        await db.execute(select(1))
        db_status = "healthy"
    except Exception as e:
        db_status = f"error: {str(e)}"
    
    # Check email config
    from app.services.email_service import EmailService
    email_configured = EmailService.is_configured()
    
    # Check Stripe config
    import os
    stripe_configured = bool(os.getenv("STRIPE_SECRET_KEY"))
    
    return {
        "status": "healthy" if db_status == "healthy" else "degraded",
        "database": db_status,
        "email_configured": email_configured,
        "stripe_configured": stripe_configured,
        "timestamp": datetime.utcnow().isoformat(),
    }


@router.post("/system/make-admin")
async def make_user_admin(
    email: str,
    db: Database,
):
    """
    Make a user an admin. 
    NOTE: This endpoint has NO authentication for initial setup!
    In production, disable after first admin is created.
    """
    result = await db.execute(select(User).where(User.email == email))
    user = result.scalar_one_or_none()
    
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    
    user.is_admin = True
    await db.commit()
    
    return {"message": f"User {email} is now an admin"}


# ============== Price Alerts ==============

@router.get("/price-alerts")
async def list_price_alerts(
    db: Database,
    admin: User = Depends(require_admin),
    limit: int = 100,
    offset: int = 0,
):
    """List all active price alerts with user info."""
    query = (
        select(PriceAlert, User)
        .join(User, PriceAlert.user_id == User.id)
        .where(PriceAlert.is_active == True)
        .order_by(desc(PriceAlert.created_at))
        .offset(offset)
        .limit(limit)
    )
    result = await db.execute(query)
    alerts = result.all()
    
    # Total count
    count_query = select(func.count(PriceAlert.id)).where(PriceAlert.is_active == True)
    total = await db.execute(count_query)
    total = total.scalar()
    
    return {
        "alerts": [
            {
                "id": alert.id,
                "tld": alert.tld,
                "target_price": float(alert.target_price) if alert.target_price else None,
                "alert_type": alert.alert_type,
                "created_at": alert.created_at.isoformat(),
                "user": {
                    "id": user.id,
                    "email": user.email,
                    "name": user.name,
                }
            }
            for alert, user in alerts
        ],
        "total": total,
    }


# ============== Domain Health ==============

@router.post("/domains/check-all")
async def trigger_domain_checks(
    background_tasks: BackgroundTasks,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Manually trigger domain availability checks for all watched domains."""
    from app.services.domain_checker import check_all_domains
    
    # Count domains to check
    total_domains = await db.execute(select(func.count(Domain.id)))
    total_domains = total_domains.scalar()
    
    if total_domains == 0:
        return {"message": "No domains to check", "domains_queued": 0}
    
    # Run in background
    background_tasks.add_task(check_all_domains, db)
    
    return {
        "message": "Domain checks started",
        "domains_queued": total_domains,
        "started_at": datetime.utcnow().isoformat(),
    }


# ============== Email Test ==============

@router.post("/system/test-email")
async def test_email(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Send a test email to the admin user."""
    from app.services.email_service import email_service
    
    if not email_service.is_configured:
        raise HTTPException(
            status_code=400,
            detail="Email service is not configured. Check SMTP settings."
        )
    
    try:
        await email_service.send_email(
            to_email=admin.email,
            subject="pounce Admin Panel - Test Email",
            html_content=f"""
            <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto;">
                <h1 style="color: #22c55e;">✅ Email Test Successful</h1>
                <p>This is a test email from the pounce Admin Panel.</p>
                <p>If you received this, your SMTP configuration is working correctly.</p>
                <hr style="border: none; border-top: 1px solid #e5e5e5; margin: 20px 0;">
                <p style="color: #666; font-size: 12px;">
                    Sent at: {datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S UTC')}<br>
                    Admin: {admin.email}
                </p>
            </div>
            """,
            text_content=f"Email Test Successful\n\nThis is a test email from the pounce Admin Panel.\nSent at: {datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S UTC')}"
        )
        return {
            "message": "Test email sent successfully",
            "sent_to": admin.email,
            "timestamp": datetime.utcnow().isoformat(),
        }
    except Exception as e:
        raise HTTPException(
            status_code=500,
            detail=f"Failed to send email: {str(e)}"
        )


# ============== Scheduler Status ==============

@router.get("/system/scheduler")
async def get_scheduler_status(
    db: Database,
    admin: User = Depends(require_admin),
):
    """Get scheduler job status and last run times."""
    from app.scheduler import scheduler
    
    jobs = []
    for job in scheduler.get_jobs():
        jobs.append({
            "id": job.id,
            "name": job.name,
            "next_run": job.next_run_time.isoformat() if job.next_run_time else None,
            "trigger": str(job.trigger),
        })
    
    # Get last scrape times from database
    # TLD scrape - check latest TLD price record
    latest_tld = await db.execute(
        select(TLDPrice.recorded_at).order_by(desc(TLDPrice.recorded_at)).limit(1)
    )
    latest_tld = latest_tld.scalar()
    
    # Auction scrape - check latest auction record
    latest_auction = await db.execute(
        select(DomainAuction.scraped_at).order_by(desc(DomainAuction.scraped_at)).limit(1)
    )
    latest_auction = latest_auction.scalar()
    
    # Domain check - check latest domain check (via Domain.last_checked)
    latest_domain_check = await db.execute(
        select(Domain.last_checked).where(Domain.last_checked.isnot(None)).order_by(desc(Domain.last_checked)).limit(1)
    )
    latest_domain_check = latest_domain_check.scalar()
    
    return {
        "scheduler_running": scheduler.running,
        "jobs": jobs,
        "last_runs": {
            "tld_scrape": latest_tld.isoformat() if latest_tld else None,
            "auction_scrape": latest_auction.isoformat() if latest_auction else None,
            "domain_check": latest_domain_check.isoformat() if latest_domain_check else None,
        },
        "timestamp": datetime.utcnow().isoformat(),
    }


# ============== Bulk Operations ==============

class BulkUpgradeRequest(BaseModel):
    """Request for bulk tier upgrade."""
    user_ids: list[int]
    tier: str


@router.post("/users/bulk-upgrade")
async def bulk_upgrade_users(
    request: BulkUpgradeRequest,
    db: Database,
    admin: User = Depends(require_admin),
):
    """Upgrade multiple users to a specific tier."""
    # Validate tier
    try:
        new_tier = SubscriptionTier(request.tier)
    except ValueError:
        raise HTTPException(
            status_code=400,
            detail=f"Invalid tier: {request.tier}. Valid: scout, trader, tycoon"
        )
    
    config = TIER_CONFIG.get(new_tier, {})
    upgraded = []
    failed = []
    
    for user_id in request.user_ids:
        try:
            # Get user
            result = await db.execute(select(User).where(User.id == user_id))
            user = result.scalar_one_or_none()
            
            if not user:
                failed.append({"user_id": user_id, "reason": "User not found"})
                continue
            
            # Get or create subscription
            sub_result = await db.execute(
                select(Subscription).where(Subscription.user_id == user.id)
            )
            subscription = sub_result.scalar_one_or_none()
            
            if not subscription:
                subscription = Subscription(
                    user_id=user.id,
                    tier=new_tier,
                    status=SubscriptionStatus.ACTIVE,
                    max_domains=config.get("domain_limit", 5),
                )
                db.add(subscription)
            else:
                subscription.tier = new_tier
                subscription.max_domains = config.get("domain_limit", 5)
                subscription.status = SubscriptionStatus.ACTIVE
            
            upgraded.append({"user_id": user_id, "email": user.email})
            
        except Exception as e:
            failed.append({"user_id": user_id, "reason": str(e)})
    
    await db.commit()
    
    # Log activity
    await log_admin_activity(
        db, admin.id, "bulk_upgrade",
        f"Upgraded {len(upgraded)} users to {new_tier.value}"
    )
    
    return {
        "message": f"Bulk upgrade completed",
        "tier": new_tier.value,
        "upgraded": upgraded,
        "failed": failed,
        "total_upgraded": len(upgraded),
        "total_failed": len(failed),
    }


# ============== Activity Log ==============

async def log_admin_activity(
    db: Database,
    admin_id: int,
    action: str,
    details: str,
):
    """Helper to log admin activities."""
    from app.models.admin_log import AdminActivityLog
    
    try:
        log = AdminActivityLog(
            admin_id=admin_id,
            action=action,
            details=details,
        )
        db.add(log)
        await db.commit()
    except Exception:
        # Don't fail if logging fails
        pass


@router.get("/activity-log")
async def get_activity_log(
    db: Database,
    admin: User = Depends(require_admin),
    limit: int = 50,
    offset: int = 0,
):
    """Get admin activity log."""
    from app.models.admin_log import AdminActivityLog
    
    query = (
        select(AdminActivityLog, User)
        .join(User, AdminActivityLog.admin_id == User.id)
        .order_by(desc(AdminActivityLog.created_at))
        .offset(offset)
        .limit(limit)
    )
    
    try:
        result = await db.execute(query)
        logs = result.all()
    except Exception:
        # Table might not exist yet
        return {"logs": [], "total": 0}
    
    # Total count
    try:
        count_query = select(func.count(AdminActivityLog.id))
        total = await db.execute(count_query)
        total = total.scalar()
    except Exception:
        total = 0
    
    return {
        "logs": [
            {
                "id": log.id,
                "action": log.action,
                "details": log.details,
                "created_at": log.created_at.isoformat(),
                "admin": {
                    "id": user.id,
                    "email": user.email,
                    "name": user.name,
                }
            }
            for log, user in logs
        ],
        "total": total,
    }