"""In-memory stand-ins for CC2 Control, Spoolman and the SSH record reader."""

from __future__ import annotations

import copy
import itertools

from app.cc2control import CC2Error
from app.spoolman import SpoolmanError, SpoolmanNotFound


def channel(weight="", type_="PLA", detailed="PLA+", color="0x000000"):
    if weight == "":
        return {k: "" for k in ("brand", "code", "color", "date", "detailed_type", "diameter", "manufacturer",
                                "nozzle_max_temp", "nozzle_min_temp", "type", "weight")}
    return {"brand": "0xEEEEEEEE", "code": "0x0001", "color": color, "date": "2000/00", "detailed_type": detailed,
            "diameter": "1.750000", "manufacturer": "ELEGOO", "nozzle_max_temp": "230", "nozzle_min_temp": "190",
            "type": type_, "weight": str(weight)}


def record(*weights):
    rec = {"auto_plug_in_enable": 0, "color_table_size": 0, "extern_channel": {}}
    for n in range(4):
        w = weights[n] if n < len(weights) else ""
        rec[f"channels{n}"] = w if isinstance(w, dict) else channel(w)
    return rec


class FakeReader:
    def __init__(self, rec=None):
        self.record = rec or record()
        self.fail = False

    def read(self):
        from app.sshsource import SSHError
        if self.fail:
            raise SSHError("Drucker nicht erreichbar")
        return copy.deepcopy(self.record)

    def close(self):
        pass


class FakeCC2:
    def __init__(self, enabled=True):
        self.enabled = enabled
        self.slots = [{"slot": i, "spool": "", "last": "", "question": "", "printer": {"status": 0}} for i in range(5)]
        self.slots[4]["printer"] = None
        self.library: list[dict] = []
        self.job = {"active": False}
        self.calls: list[tuple] = []
        self.fail = False
        self._ids = (f"s{i:04d}" for i in itertools.count(1))

    def _check(self):
        if self.fail:
            raise CC2Error("CC2 Control nicht erreichbar")

    def spools_json(self):
        return {"enabled": self.enabled, "slots": self.slots, "spools": self.library, "job": self.job, "log": []}

    def spools(self):
        self._check()
        return copy.deepcopy(self.spools_json())

    def canvas(self):
        self._check()
        return {}

    def save_spool(self, fields):
        self._check()
        self.calls.append(("save", dict(fields)))
        if fields.get("id"):
            sp = next(s for s in self.library if s["id"] == fields["id"])
            if "archived" in fields:
                sp["archived"] = fields["archived"] in ("1", 1, True)
            return {"ok": True, "id": sp["id"]}
        sp = {"id": next(self._ids), "name": fields.get("name", ""), "brand": fields.get("brand", ""),
              "material": fields["material"], "color": fields["color"], "diameter": fields.get("diameter", 1.75),
              "density": fields.get("density", 1.24), "net": fields.get("net", 1000),
              "remaining": fields.get("remaining", fields.get("net", 1000)), "tare": fields.get("tare", 0),
              "low": 0, "price": 0, "note": fields.get("note", ""), "created": 0, "used": 0, "archived": False}
        self.library.append(sp)
        return {"ok": True, "id": sp["id"]}

    def assign(self, slot, spool_id):
        self._check()
        self.calls.append(("assign", slot, spool_id))
        for s in self.slots:
            if spool_id and s["spool"] == spool_id:
                s["spool"] = ""
        self.slots[slot]["spool"] = spool_id or ""
        self.slots[slot]["question"] = ""
        return {"ok": True}

    def enable(self, on):
        self._check()
        self.calls.append(("enable", on))
        self.enabled = on
        return {"ok": True, "enabled": on}

    def consume(self, cc2_id, grams):
        sp = next(s for s in self.library if s["id"] == cc2_id)
        sp["remaining"] -= grams

    def close(self):
        pass


class FakeSpoolman:
    def __init__(self):
        self.db: dict[int, dict] = {}
        self.calls: list[tuple] = []
        self.fail = False
        self.fail_use_after_apply = False

    def add(self, sid, vendor="SUNLU", material="PLA+", color="000000", remaining=800.0, lot=None, **extra):
        self.db[sid] = {
            "id": sid, "lot_nr": lot if lot is not None else f"{vendor.upper()}{sid:03d}",
            "remaining_weight": remaining, "initial_weight": 1000.0, "spool_weight": 150.0, "used_weight": 0.0,
            "location": "", "archived": False,
            "filament": {"id": sid, "name": f"{material} {color}", "material": material, "color_hex": color,
                         "diameter": 1.75, "density": 1.24, "weight": 1000.0, "vendor": {"name": vendor}},
            **extra,
        }
        return self.db[sid]

    def _check(self):
        if self.fail:
            raise SpoolmanError("Spoolman nicht erreichbar")

    def spool(self, sid):
        self._check()
        if sid not in self.db:
            raise SpoolmanNotFound("nicht gefunden")
        return copy.deepcopy(self.db[sid])

    def spools(self, archived=False):
        self._check()
        return [copy.deepcopy(s) for s in self.db.values() if archived or not s["archived"]]

    def set_location(self, sid, location):
        self._check()
        self.calls.append(("location", sid, location))
        self.db[sid]["location"] = location
        return self.db[sid]

    def use(self, sid, grams):
        self._check()
        self.calls.append(("use", sid, round(grams, 3)))
        sp = self.db[sid]
        sp["used_weight"] += grams
        sp["remaining_weight"] -= grams
        if self.fail_use_after_apply:
            raise SpoolmanError("Timeout")
        return sp

    def close(self):
        pass