"""The Character — Townlet's only first-class actor.

Holds the slow-moving identity (name, personality, journal, traits) and the
fast-moving world-state (location, inventory, locker, current action). The
shared interpreter's filesystem is the ultimate source of truth for the
slow-moving fields — they live as JSON files and characters can mutate each
other's. The in-memory Character is a synced cache.
"""

from __future__ import annotations

from dataclasses import dataclass, field

TRAIT_NAMES = (
    "curiosity",
    "malice",
    "generosity",
    "ambition",
    "paranoia",
    "laziness",
    "loyalty",
    "existentialism",
)

TRACE_CAP = 1000  # ring buffer per character


def default_traits() -> dict[str, int]:
    return {name: 5 for name in TRAIT_NAMES}


@dataclass
class Action:
    verb: str
    params: dict
    ticks_remaining: int = 0


@dataclass
class TraceEntry:
    """One CodeAgent invocation. Captures what the model said and what it did.

    Surfaced in the side panel as the per-character Trace. Persisted in
    state.json. Not injected into perception prompts — but lives on the
    shared interpreter's filesystem so a curious agent can discover other
    characters' traces via the shell.
    """

    tick: int
    thought: str  # the model's raw text output
    tool_calls: list[dict] = field(default_factory=list)  # [{verb, args, result}]
    error: str | None = None


@dataclass
class Character:
    name: str
    personality: str
    model_id: str
    sprite_id: str
    archetype: str = "wanderer"
    journal: list[str] = field(default_factory=list)
    traits: dict[str, int] = field(default_factory=default_traits)
    goal: str = "Find your place in this town."
    reward: str = ""  # archetype-specific "what gives you joy" line; surfaced in system prompt
    pos: tuple[int, int] = (0, 0)
    inventory: dict[str, int] = field(default_factory=lambda: {"electricity": 0, "water": 0})
    locker: dict[str, int] = field(default_factory=lambda: {"electricity": 0, "water": 0})
    current_action: Action | None = None
    alive: bool = True
    trace: list[TraceEntry] = field(default_factory=list)
    stream_of_consciousness: str = ""
    decisions_since_soc: int = 0

    def append_trace(self, entry: TraceEntry) -> None:
        self.trace.append(entry)
        if len(self.trace) > TRACE_CAP:
            # ring buffer: drop oldest
            del self.trace[: len(self.trace) - TRACE_CAP]

    def to_public_dict(self) -> dict:
        """The view other characters see — public state only."""
        return {
            "name": self.name,
            "pos": list(self.pos),
            "goal": self.goal,
            "current_action": self.current_action.verb if self.current_action else "idle",
            "alive": self.alive,
        }

    def to_full_dict(self) -> dict:
        """The view the UI / scheduler / persistence see."""
        return {
            "name": self.name,
            "personality": self.personality,
            "model_id": self.model_id,
            "sprite_id": self.sprite_id,
            "archetype": self.archetype,
            "journal": list(self.journal),
            "traits": dict(self.traits),
            "goal": self.goal,
            "reward": self.reward,
            "pos": list(self.pos),
            "inventory": dict(self.inventory),
            "locker": dict(self.locker),
            "current_action": {
                "verb": self.current_action.verb,
                "params": self.current_action.params,
                "ticks_remaining": self.current_action.ticks_remaining,
            }
            if self.current_action
            else None,
            "alive": self.alive,
            "trace": [
                {
                    "tick": e.tick,
                    "thought": e.thought,
                    "tool_calls": list(e.tool_calls),
                    "error": e.error,
                }
                for e in self.trace
            ],
            "stream_of_consciousness": self.stream_of_consciousness,
            "decisions_since_soc": self.decisions_since_soc,
        }