import logging
import os
from contextlib import asynccontextmanager
from typing import List

from dotenv import load_dotenv

load_dotenv()

from fastapi import FastAPI, Depends, HTTPException, Path
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from src.database.config import get_db, init_db
from src.auth.router import router as auth_router, admin_router as auth_admin_router
from src.auth.dependencies import require_auth, require_superadmin
from src.auth.models import TokenData
from src.auth.password import hash_password
from src.tenant import manager as tenant_manager
from src.tenant.manager import TenantNotFoundError, InvalidTenantIdError
from src.api.machines import router as machines_router
from src.api.equipment_parts import router as equipment_parts_router

logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    await init_db()
    logger.info("Database initialized")
    yield


app = FastAPI(title="FactoryOps v2 API", lifespan=lifespan)

app.include_router(auth_router)
app.include_router(auth_admin_router)
app.include_router(machines_router)
app.include_router(equipment_parts_router)

CORS_ORIGINS = (
    os.getenv("CORS_ORIGINS", "").split(",") if os.getenv("CORS_ORIGINS") else []
)
if not CORS_ORIGINS:
    CORS_ORIGINS = ["http://localhost:3100", "http://127.0.0.1:3100"]
app.add_middleware(
    CORSMiddleware,
    allow_origins=CORS_ORIGINS,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.get("/api/health")
async def health_check():
    return {"status": "ok", "version": "2.0.0"}


class TenantCreate(BaseModel):
    id: str
    name: str
    industry_type: str = "general"


@app.get("/api/tenants")
async def list_accessible_tenants(
    current_user: TokenData = Depends(require_auth),
    db: AsyncSession = Depends(get_db),
):
    all_tenants = await tenant_manager.list_tenants(db)

    if current_user.role == "superadmin":
        return {"tenants": [t for t in all_tenants if t.get("is_active", True)]}

    if current_user.tenant_id:
        return {
            "tenants": [
                t
                for t in all_tenants
                if t["id"] == current_user.tenant_id and t.get("is_active", True)
            ]
        }

    return {"tenants": []}


@app.get("/api/admin/tenants")
async def list_all_tenants(
    current_user: TokenData = Depends(require_superadmin),
    db: AsyncSession = Depends(get_db),
):
    return {"tenants": await tenant_manager.list_tenants(db)}


@app.post("/api/admin/tenants")
async def create_tenant(
    tenant: TenantCreate,
    current_user: TokenData = Depends(require_superadmin),
    db: AsyncSession = Depends(get_db),
):
    try:
        result = await tenant_manager.create_tenant(
            db, tenant.id, tenant.name, tenant.industry_type
        )
        return {"status": "success", "tenant": result}
    except InvalidTenantIdError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=409, detail=str(e))


@app.get(
    "/api/admin/tenants/{tenant_id}",
)
async def get_tenant(
    tenant_id: str = Path(..., pattern=r"^[a-z0-9][a-z0-9-]{1,30}[a-z0-9]$"),
    current_user: TokenData = Depends(require_superadmin),
    db: AsyncSession = Depends(get_db),
):
    try:
        return await tenant_manager.get_tenant(db, tenant_id)
    except TenantNotFoundError as e:
        raise HTTPException(status_code=404, detail=str(e))


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(
        "main:app",
        host=os.getenv("HOST", "0.0.0.0"),
        port=int(os.getenv("PORT", "8000")),
        reload=True,
    )