import re

from fastapi import APIRouter, Depends, HTTPException, status

from app.core.deps import current_principal, current_user, require_client_roles, Principal
from app.models import Organization, OrgMember, Plan, Subscription, StorageUsage, AuditLog
from app.models.enums import ClientRole
from app.schemas.common import OrgCreate

router = APIRouter(tags=["organization"])


@router.get("/me")
async def me(p: Principal = Depends(current_principal)):
    """Who am I — used by the frontend to route admins vs clients."""
    return {
        "id": str(p.user.id),
        "name": p.user.name,
        "email": p.user.email,
        "email_verified": p.user.email_verified,
        "is_product_admin": p.user.is_product_admin,
        "product_admin_role": p.admin_role,
        "client_role": p.client_role,
        "has_org": p.org is not None,
        "org_name": p.org.name if p.org else None,
        
    }


def _slug(name: str) -> str:
    base = re.sub(r"[^a-z0-9]+", "-", name.lower()).strip("-")
    return base or "org"


@router.post("/organization", status_code=201)
async def create_org(body: OrgCreate, user=Depends(current_user)):
    existing = await OrgMember.find_one(OrgMember.user_id == str(user.id))
    if existing:
        raise HTTPException(status.HTTP_409_CONFLICT, "User already belongs to an organization")
    free = await Plan.find_one(Plan.name == "Free")
    slug = _slug(body.name)
    if await Organization.find_one(Organization.slug == slug):
        slug = f"{slug}-{str(user.id)[-4:]}"
    org = Organization(name=body.name, slug=slug, gstin=body.gstin, pan=body.pan,
                       contact_email=body.contact_email or user.email,address=body.address,
                       phone=body.phone, website=body.website,
                       plan_id=str(free.id) if free else None)
    await org.insert()
    await OrgMember(org_id=str(org.id), user_id=str(user.id),
                    role=ClientRole.admin, status="active").insert()
    await StorageUsage(org_id=str(org.id),
                       total_bytes=(free.storage_gb if free else 5) * 1024 ** 3).insert()
    if free:
        await Subscription(org_id=str(org.id), plan_id=str(free.id),
                           plan_name=free.name).insert()
    await AuditLog(org_id=str(org.id), user_id=str(user.id), user_name=user.name,
                   action="org.create", module="organization",
                   details=f"Created org {org.name}").insert()
    return {"id": str(org.id), "name": org.name, "slug": org.slug}


@router.get("/organization")
async def get_org(p: Principal = Depends(current_principal)):
    if not p.org:
        raise HTTPException(status.HTTP_404_NOT_FOUND, "No organization")
    plan = await Plan.get(p.org.plan_id) if p.org.plan_id else None
    return {
        "id": str(p.org.id), "name": p.org.name, "slug": p.org.slug,
        "logo_url": p.org.logo_url, "gstin": p.org.gstin, "pan": p.org.pan,
        "timezone": p.org.timezone, "language": p.org.language,
        "subscription_status": p.org.subscription_status,"address": p.org.address,
    "phone": p.org.phone,
    "website": p.org.website,
    "contact_email": p.org.contact_email,
    "address":p.org.address,"country": p.org.country,
        "product_count": p.org.product_count, "user_count": p.org.user_count,
        "plan": {"name": plan.name, "product_limit": plan.product_limit,
                 "user_limit": plan.user_limit, "price": plan.price} if plan else None,
        "your_role": p.client_role,
    }


@router.put("/organization")
async def update_org(body: dict, p: Principal = Depends(require_client_roles(ClientRole.admin))):
    allowed = {"name", "logo_url", "gstin", "pan", "address", "contact_email","country",
               "phone", "website", "timezone", "language"}
    for k, v in body.items():
        if k in allowed:
            setattr(p.org, k, v)
    await p.org.save()
    await AuditLog(
    org_id=str(p.org.id),
    user_id=str(p.user.id),
    user_name=p.user.name,
    user_role=p.client_role,
    action="organization.update",
    module="organization",
    details=f"Updated organization {p.org.name}",
).insert()
    return {"message": "updated"}


from datetime import datetime
from typing import Optional

@router.get("/audit-logs")
async def org_audit_logs(
    p: Principal = Depends(require_client_roles(ClientRole.admin)),
    limit: int = 50,
    module: Optional[str] = None,
    user: Optional[str] = None,
    from_date: Optional[str] = None,
    to_date: Optional[str] = None,
):
    query = AuditLog.find(AuditLog.org_id == str(p.org.id))

    if module:
        query = query.find(AuditLog.module == module)

    if user:
        query = query.find(AuditLog.user_name == user)

    if from_date:
        query = query.find(
            AuditLog.created_at >= datetime.fromisoformat(from_date)
        )

    if to_date:
        query = query.find(
            AuditLog.created_at <= datetime.fromisoformat(to_date + "T23:59:59")
        )

    logs = await query.sort(-AuditLog.created_at).limit(limit).to_list()

    return [
        {
            "at": l.created_at,
            "user": l.user_name,
            "role": l.user_role,
            "action": l.action,
            "module": l.module,
            "details": l.details,
            "ip": l.ip,
        }
        for l in logs
    ]


@router.get("/roles")
async def list_roles():
    return [
        {"role": "admin", "label": "Admin",
         "description": "Full access within the organization: products, QRs, batches, compliance, users, billing."},
        {"role": "finance", "label": "Finance",
         "description": "Billing, invoices, payment methods, subscription within the org only."},
        {"role": "user", "label": "User",
         "description": "Create products, generate QRs, manage batches, view analytics. No billing/invites."},
    ]