#!/usr/bin/env bash
# Credential pre-flight for the agentic reviewer, in ONE definition.
#
# Sourced by run.sh (production) and by preflight_test.sh (the table test), so
# there is no second copy to drift. An earlier version of this change had the
# logic in run.sh and a duplicate in the test reconciled by a regex diff — that
# guard only covered the provider table and not the decision logic below, which
# is precisely the half that had the bug.
#
# Why pre-flight at all, when majordomo already fails closed with a 401:
# without it a missing key surfaces as five identical per-lens agent failures
# that name no variable, and the operator reads a stack trace to learn which
# secret they forgot to forward.

# gadfly_preflight_key <provider> -> echoes "" when the run may proceed, or the
# name of the environment variable the operator must set.
#
# Scope: the REGISTRY path only — i.e. GADFLY_BASE_URL unset. That is deliberate.
# With an explicit endpoint, resolveModel constructs the client directly and the
# credential is GADFLY_API_KEY, falling back to the client's own default
# (OPENAI_API_KEY for the openai family) — while the built-ins' own variables are
# never consulted. Checking one path's rules against the other produced a
# false-pass in BOTH directions across successive fixes here, so this checks the
# path whose rules it can state exactly and stays silent on the other. An
# override-path config is hand-written by definition; the registry path is the
# one somebody hits by adding a model id to a var and forgetting the secret.
gadfly_preflight_key() {
  local provider="$1" key_env="" key_hint=""

  # Only the registry path has knowable credential rules — see above.
  if [ -n "${GADFLY_BASE_URL:-}" ]; then
    echo ""
    return 0
  fi

  # A provider is absent from this table for one of TWO different reasons — do
  # not assume the first one and add an arm:
  #   1. It needs no key, or carries it in its endpoint/DSN: local ollama,
  #      llama-swap, foreman.
  #   2. It needs a key but accepts more than one variable, so a single-name
  #      check would skip a correctly-configured run. **google** is this case:
  #      GOOGLE_API_KEY *or* GEMINI_API_KEY. Adding
  #      `google) key_env="GOOGLE_API_KEY"` would silently skip every reviewer
  #      configured with GEMINI_API_KEY. Pre-flighting google needs an
  #      either-variable check, not this table's one-name shape.
  case "$provider" in
    ollama-cloud)              key_env="OLLAMA_API_KEY";    key_hint="OLLAMA_CLOUD_API_KEY" ;;
    qwen)                      key_env="QWEN_API_KEY";      key_hint="QWEN_API_KEY" ;;
    kimi)                      key_env="KIMI_API_KEY";      key_hint="KIMI_API_KEY" ;;
    openai|openai-compatible)  key_env="OPENAI_API_KEY";    key_hint="OPENAI_API_KEY" ;;
    anthropic)                 key_env="ANTHROPIC_API_KEY"; key_hint="ANTHROPIC_API_KEY" ;;
  esac

  if [ -z "$key_env" ]; then
    echo ""                       # provider needs no pre-flight
    return 0
  fi
  # Indirect expansion (bash). Each majordomo built-in reads ONLY its own
  # variable — cross-provider fallback is refused by design — so the named hint
  # is always the actual fix.
  if [ -n "${!key_env:-}" ]; then
    echo ""
    return 0
  fi
  echo "$key_hint"
}