import uuid as _uuid
from pathlib import Path

from fastapi import APIRouter, Depends, File, Form, Request, UploadFile
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.templating import Jinja2Templates
from sqlalchemy import or_
from sqlalchemy.orm import Session
from starlette.status import HTTP_303_SEE_OTHER

from app.db import get_db
from app.models.filament import Filament
from app.models.job_log import JobLog
from app.models.print_job import JobStatus, PrintJob
from app.models.printer import Printer, PrinterStatus
from app.models.printer_log import PrinterLog
from app.models.printer_type import PrinterType
from app.models.pricing import PricingConfig
from app.models.todo import Todo
from app.stl import get_stl_dir, list_stl_files

router = APIRouter()
templates = Jinja2Templates(directory="app/templates")


# ── Dashboard ──────────────────────────────────────────────────────────────────

@router.get("/", response_class=HTMLResponse)
def dashboard(request: Request, db: Session = Depends(get_db)):
    printers = db.query(Printer).order_by(Printer.name).all()
    return templates.TemplateResponse("dashboard.html", {
        "request": request,
        "active": "dashboard",
        "printers": printers,
        "total_printers": len(printers),
        "printing_count": sum(1 for p in printers if p.status == PrinterStatus.printing),
        "active_jobs": db.query(PrintJob).filter(
            PrintJob.status.in_([JobStatus.queued, JobStatus.printing])
        ).count(),
        "total_filaments": db.query(Filament).count(),
        "recent_jobs": db.query(PrintJob).order_by(PrintJob.created_at.desc()).limit(5).all(),
    })


# ── Printers ───────────────────────────────────────────────────────────────────

@router.get("/printers", response_class=HTMLResponse)
def printers_page(request: Request, db: Session = Depends(get_db)):
    return templates.TemplateResponse("printers.html", {
        "request": request,
        "active": "printers",
        "printers": db.query(Printer).order_by(Printer.name).all(),
        "printer_types": db.query(PrinterType).order_by(PrinterType.name).all(),
    })


@router.post("/printers")
def create_printer(
    name: str = Form(...),
    location: str = Form(""),
    type_id: str = Form(""),
    bought_at: str = Form(""),
    db: Session = Depends(get_db),
):
    from datetime import date
    printer = Printer(
        name=name.strip(),
        location=location.strip() or None,
        type_id=int(type_id) if type_id else None,
        bought_at=date.fromisoformat(bought_at) if bought_at else None,
    )
    db.add(printer)
    db.commit()
    return RedirectResponse(url="/printers", status_code=HTTP_303_SEE_OTHER)


@router.get("/printers/{printer_id}", response_class=HTMLResponse)
def printer_detail(printer_id: int, request: Request, db: Session = Depends(get_db)):
    from fastapi import HTTPException
    printer = db.query(Printer).filter(Printer.id == printer_id).first()
    if not printer:
        raise HTTPException(status_code=404, detail="Printer not found")
    return templates.TemplateResponse("printer_detail.html", {
        "request": request,
        "active": "printers",
        "printer": printer,
    })


@router.post("/printers/{printer_id}/log")
def add_printer_log(printer_id: int, message: str = Form(...), db: Session = Depends(get_db)):
    db.add(PrinterLog(printer_id=printer_id, message=message.strip()))
    db.commit()
    return RedirectResponse(url=f"/printers/{printer_id}", status_code=HTTP_303_SEE_OTHER)


# ── Printer types ──────────────────────────────────────────────────────────────

@router.get("/printer-types", response_class=HTMLResponse)
def printer_types_page(request: Request, db: Session = Depends(get_db)):
    return templates.TemplateResponse("printer_types.html", {
        "request": request,
        "active": "printers",
        "printer_types": db.query(PrinterType).order_by(PrinterType.name).all(),
    })


@router.post("/printer-types")
def create_printer_type(
    name: str = Form(...),
    bed_x_mm: int = Form(...),
    bed_y_mm: int = Form(...),
    bed_z_mm: int = Form(...),
    db: Session = Depends(get_db),
):
    db.add(PrinterType(name=name.strip(), bed_x_mm=bed_x_mm, bed_y_mm=bed_y_mm, bed_z_mm=bed_z_mm))
    db.commit()
    return RedirectResponse(url="/printer-types", status_code=HTTP_303_SEE_OTHER)


# ── Jobs ───────────────────────────────────────────────────────────────────────

@router.get("/jobs", response_class=HTMLResponse)
def jobs_page(request: Request, q: str = "", db: Session = Depends(get_db)):
    query = db.query(PrintJob)
    if q:
        like = f"%{q}%"
        query = query.filter(
            or_(PrintJob.customer.ilike(like), PrintJob.file_name.ilike(like))
        )
    return templates.TemplateResponse("jobs.html", {
        "request": request,
        "active": "jobs",
        "jobs": query.order_by(PrintJob.created_at.desc()).all(),
        "q": q,
        "printers": db.query(Printer).order_by(Printer.name).all(),
        "filaments": db.query(Filament).order_by(Filament.material, Filament.color).all(),
        "stl_files": list_stl_files(),
    })


@router.post("/jobs")
async def create_job(
    printer_id: str = Form(""),
    customer: str = Form(""),
    filament_id: str = Form(""),
    notes: str = Form(""),
    stl_file: UploadFile = File(None),
    stl_select: str = Form(""),
    db: Session = Depends(get_db),
):
    filename = None
    if stl_file and stl_file.filename:
        filename = stl_file.filename
        (get_stl_dir() / filename).write_bytes(await stl_file.read())
    elif stl_select:
        filename = stl_select

    job = PrintJob(
        job_uuid=str(_uuid.uuid4()),
        name=Path(filename).stem if filename else (customer.strip() or "Unnamed"),
        file_name=filename,
        printer_id=int(printer_id) if printer_id else None,
        filament_id=int(filament_id) if filament_id else None,
        customer=customer.strip() or None,
        notes=notes.strip() or None,
    )
    db.add(job)
    db.flush()
    db.add(JobLog(job_id=job.id, message="Job created"))
    db.commit()
    return RedirectResponse(url="/jobs", status_code=HTTP_303_SEE_OTHER)


# ── Filaments ──────────────────────────────────────────────────────────────────

@router.get("/filaments", response_class=HTMLResponse)
def filaments_page(request: Request, db: Session = Depends(get_db)):
    return templates.TemplateResponse("filaments.html", {
        "request": request,
        "active": "filaments",
        "filaments": db.query(Filament).order_by(Filament.brand, Filament.material).all(),
    })


# ── To-Do ──────────────────────────────────────────────────────────────────────

@router.get("/todos", response_class=HTMLResponse)
def todos_page(request: Request, db: Session = Depends(get_db)):
    return templates.TemplateResponse("todos.html", {
        "request": request,
        "active": "todos",
        "todos": db.query(Todo).order_by(Todo.done, Todo.created_at.desc()).all(),
    })


# ── Pricing ────────────────────────────────────────────────────────────────────

@router.get("/pricing", response_class=HTMLResponse)
def pricing_page(request: Request, db: Session = Depends(get_db)):
    return templates.TemplateResponse("pricing.html", {
        "request": request,
        "active": "pricing",
        "configs": db.query(PricingConfig).order_by(PricingConfig.valid_from.desc()).all(),
    })