"""Minimal Spoolman REST client (/api/v1)."""

from __future__ import annotations

import json
import re

import httpx


# Extra fields the bridge keeps on loaded spools (Spoolman stores values JSON-encoded).
FIELD_PRINTER = "drucker"
FIELD_SLOT = "slot"
FIELD_DEFS = {
    FIELD_PRINTER: {"name": "Drucker", "field_type": "text", "order": 100},
    FIELD_SLOT: {"name": "Slot", "field_type": "integer", "order": 101},
}


class SpoolmanError(RuntimeError):
    pass


class SpoolmanNotFound(SpoolmanError):
    pass


class Spoolman:
    def __init__(self, base_url: str, timeout: float = 8.0, transport: httpx.BaseTransport | None = None):
        self.client = httpx.Client(base_url=base_url.rstrip("/") + "/api/v1", timeout=timeout, transport=transport)

    def close(self):
        self.client.close()

    def _request(self, method: str, path: str, **kw):
        try:
            r = self.client.request(method, path, **kw)
        except httpx.HTTPError as e:
            raise SpoolmanError(f"Spoolman nicht erreichbar ({type(e).__name__})") from None
        if r.status_code == 404:
            raise SpoolmanNotFound(f"Spoolman {path}: nicht gefunden")
        if r.status_code >= 400:
            raise SpoolmanError(f"Spoolman {method} {path}: HTTP {r.status_code}")
        try:
            return r.json()
        except ValueError:
            raise SpoolmanError(f"Spoolman {path}: keine JSON-Antwort") from None

    def spool(self, spool_id: int) -> dict:
        return self._request("GET", f"/spool/{int(spool_id)}")

    def spools(self, archived: bool = False) -> list[dict]:
        return self._request("GET", "/spool", params={"allow_archived": str(archived).lower()})

    def update_spool(self, spool_id: int, body: dict) -> dict:
        return self._request("PATCH", f"/spool/{int(spool_id)}", json=body)

    def fields(self) -> list[dict]:
        return self._request("GET", "/field/spool")

    def add_field(self, key: str, params: dict) -> list[dict]:
        return self._request("POST", f"/field/spool/{key}", json=params)

    def use(self, spool_id: int, grams: float) -> dict:
        return self._request("PUT", f"/spool/{int(spool_id)}/use", json={"use_weight": round(float(grams), 3)})


def vendor_name(spool: dict) -> str:
    return ((spool.get("filament") or {}).get("vendor") or {}).get("name") or ""


def label(spool: dict) -> str:
    """lot_nr like SUNLU001; otherwise built from vendor + id the same way."""
    lot = (spool.get("lot_nr") or "").strip()
    if lot:
        return lot
    vendor = re.sub(r"[^A-Z0-9]", "", vendor_name(spool).upper()) or "SPOOL"
    return f"{vendor}{int(spool['id']):03d}"


def color_hex(spool: dict) -> str | None:
    fil = spool.get("filament") or {}
    color = fil.get("color_hex")
    if not color and fil.get("multi_color_hexes"):
        color = str(fil["multi_color_hexes"]).split(",")[0]
    if not color:
        return None
    color = color.strip().lstrip("#").upper()[:6]
    return color if re.fullmatch(r"[0-9A-F]{6}", color) else None


def extra_value(spool: dict, key: str):
    raw = (spool.get("extra") or {}).get(key)
    if raw is None:
        return None
    try:
        return json.loads(raw)
    except (TypeError, ValueError):
        return None


def summary(spool: dict) -> dict:
    fil = spool.get("filament") or {}
    return {
        "id": spool.get("id"),
        "label": label(spool),
        "vendor": vendor_name(spool),
        "name": fil.get("name") or "",
        "material": fil.get("material") or "",
        "color": color_hex(spool),
        "diameter": fil.get("diameter"),
        "density": fil.get("density"),
        "remaining": spool.get("remaining_weight"),
        "initial": spool.get("initial_weight") or fil.get("weight"),
        "spool_weight": spool.get("spool_weight") or fil.get("spool_weight"),
        "extruder_temp": fil.get("settings_extruder_temp"),
        "location": spool.get("location") or "",
        "archived": bool(spool.get("archived")),
        "used_weight": spool.get("used_weight"),
        "printer": extra_value(spool, FIELD_PRINTER),
        "slot": extra_value(spool, FIELD_SLOT),
    }