import yaml
from datetime import datetime, timezone
from typing import Dict, Optional, List, Any

from src.state_machine import State, CardType


class CardGenerator:
    def __init__(self):
        self.card_id_counter = 0

    def generate(
        self,
        state: State,
        card_type: CardType,
        title: str,
        description: str,
        content: Dict[str, Any],
        dataset_result: Optional[Dict] = None,
        context_links: Optional[List[str]] = None,
        next_actions: Optional[List[str]] = None,
        version: str = "1.0.1",
    ) -> str:
        self.card_id_counter += 1

        ts = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")

        card = {
            "STATE": state.value,
            "LOCK": "ON",
            "CARD_TYPE": card_type.value,
            "CARD_ID": f"{card_type.value}_{self.card_id_counter:04d}",
            "VERSION": version,
            "TIMESTAMP": ts,
            "TITLE": title,
            "DESCRIPTION": description,
            "CONTENT": content or {},
            "CONTEXT_LINKS": context_links or [f"{state.value}.default_context"],
            "NEXT_ACTIONS": next_actions
            or ["RESET", "MODE <state>", "CARD <type>", "RUN <query>", "LEDGER"],
        }

        # Dataset annotation (kept small)
        if isinstance(dataset_result, dict):
            rows = dataset_result.get("rows")
            result_count = len(rows) if isinstance(rows, list) else None
            card["DATASET_ANNOTATION"] = {
                "RESULT_COUNT": result_count,
                "HAS_ERROR": bool(dataset_result.get("error")),
            }

        header = f"{state.value}\n"  # optional anchor
        yaml_out = yaml.safe_dump(card, sort_keys=False, allow_unicode=True)

        footer = ""
        if isinstance(dataset_result, dict) and isinstance(dataset_result.get("rows"), list):
            footer = f"\n---\nSOURCE: Dataset query returned {len(dataset_result['rows'])} results\n"

        return f"[STATE: {state.value} | LOCK: ON]\n\n{yaml_out}{footer}"

    def generate_error_card(self, state: State, error: str) -> str:
        return self.generate(
            state=state,
            card_type=CardType.SPEC,
            title="Error Response",
            description="An error occurred while processing the command.",
            content={"ERROR": error, "RECOVERY": "Check command syntax and retry."},
            next_actions=["HELP", "RESET"],
        )