"""Per-product operational state and safe partial-processing metrics."""

from collections import Counter
import hashlib
import json

STATES = {
    "COMPLETE", "CORRECTED", "BLOCKED_MISSING_EVIDENCE", "BLOCKED_CONFLICT",
    "BLOCKED_COMPANY_CONTEXT", "BLOCKED_SCHEMA", "FAILED_TECHNICAL",
}


def blocker_fingerprint(tenant: str, company: str, product_code: str, field: str, reason_code: str, input_fingerprint: str) -> str:
    raw = {"tenant": tenant, "company": company, "product_code": product_code, "field": field, "reason_code": reason_code, "input_fingerprint": input_fingerprint}
    return hashlib.sha256(json.dumps(raw, sort_keys=True, separators=(",", ":")).encode()).hexdigest()


def classify_product_state(product: dict, decision: dict, *, write_status: str | None = None) -> dict:
    status = str(decision.get("status") or "").upper()
    if write_status == "FAILED":
        state = "FAILED_TECHNICAL"
    elif status in {"AMBIGUOUS", "CONFLICT", "NCM_CONFLICT"}:
        state = "BLOCKED_CONFLICT"
    elif status in {"INVALID_NCM", "LEGACY_NCM", "NOT_FOUND"}:
        state = "BLOCKED_MISSING_EVIDENCE"
    elif status in {"COMPANY_CONTEXT_REQUIRED", "COMPANY_CONTEXT_FAIL"}:
        state = "BLOCKED_COMPANY_CONTEXT"
    elif status in {"ERP_SCHEMA_LIMITATION", "UNSUPPORTED_SCHEMA"}:
        state = "BLOCKED_SCHEMA"
    elif write_status == "SUCCEEDED":
        state = "CORRECTED"
    else:
        state = "COMPLETE"
    return {"product_code": str(product.get("CODIGO") or ""), "state": state, "decision_status": status}


def should_retry_blocker(previous_input_fingerprint: str | None, current_input_fingerprint: str) -> bool:
    return previous_input_fingerprint != current_input_fingerprint


def summarize_operational_states(states: list[dict]) -> dict:
    counts = Counter(item.get("state") for item in states)
    result = {state: counts.get(state, 0) for state in sorted(STATES)}
    result["TOTAL_PRODUCTS"] = len(states)
    result["SAFE_BLOCKED"] = sum(result[state] for state in STATES if state.startswith("BLOCKED_"))
    result["AUTONOMOUSLY_PROCESSABLE_PRODUCTS"] = result["TOTAL_PRODUCTS"] - result["FAILED_TECHNICAL"]
    result["AGENT_HEALTH"] = "HEALTHY" if result["FAILED_TECHNICAL"] == 0 else "DEGRADED"
    return result