#!/usr/bin/env bash
# detect-provider.sh — detecta el proveedor LLM disponible desde .env
#
# Salida: dos palabras en stdout — "<provider> <model>"
#   openai    gpt-4o
#   anthropic claude-sonnet-4-20250514
#
# Orden de detección:
#   1. OPENAI_API_KEY    → openai gpt-4o
#   2. ANTHROPIC_API_KEY → anthropic claude-sonnet-4-20250514
#   Fallback: openai gpt-4o (con warning en stderr)
#
# Uso:
#   read -r PROVIDER MODEL < <(./dev-scripts/agent/detect-provider.sh)
#   ./dev-scripts/agent/detect-provider.sh   # imprime "openai gpt-4o"

source "$(dirname "$0")/../_common.sh"
load_env

# Default models por provider
OPENAI_DEFAULT_MODEL="gpt-4o"
ANTHROPIC_DEFAULT_MODEL="claude-sonnet-4-20250514"

# Detectar provider disponible
if [[ -n "${OPENAI_API_KEY:-}" ]]; then
  echo "openai $OPENAI_DEFAULT_MODEL"
  exit 0
fi

if [[ -n "${ANTHROPIC_API_KEY:-}" ]]; then
  echo "anthropic $ANTHROPIC_DEFAULT_MODEL"
  exit 0
fi

# Fallback con warning
warn "Ninguna API key configurada (OPENAI_API_KEY, ANTHROPIC_API_KEY) — usando fallback openai/gpt-4o" >&2
echo "openai $OPENAI_DEFAULT_MODEL"
exit 0