#!/usr/bin/env bash
# detect-provider.sh — detecta el proveedor LLM disponible desde .env
#
# Salida: dos palabras en stdout — "<provider> <model>"
#   claude-code sonnet                       (DEFAULT)
#   openai      gpt-4o
#   anthropic   claude-sonnet-4-20250514
#
# Orden de detección (claude-code primero — REGLA DEL PROYECTO):
#   1. CLAUDE binary disponible en PATH → claude-code sonnet
#   2. OPENAI_API_KEY                   → openai gpt-4o
#   3. ANTHROPIC_API_KEY                → anthropic claude-sonnet-4-20250514
#   Fallback: claude-code sonnet (binary `claude` debe estar instalado)
#
# Uso:
#   read -r PROVIDER MODEL < <(./dev-scripts/agent/detect-provider.sh)
#   ./dev-scripts/agent/detect-provider.sh   # imprime "claude-code sonnet"

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

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

# 1. claude-code (preferido) — solo requiere el binario `claude` en PATH
if command -v claude >/dev/null 2>&1; then
  echo "claude-code $CLAUDE_CODE_DEFAULT_MODEL"
  exit 0
fi

# 2. OpenAI API key
if [[ -n "${OPENAI_API_KEY:-}" ]]; then
  echo "openai $OPENAI_DEFAULT_MODEL"
  exit 0
fi

# 3. Anthropic API key
if [[ -n "${ANTHROPIC_API_KEY:-}" ]]; then
  echo "anthropic $ANTHROPIC_DEFAULT_MODEL"
  exit 0
fi

# Fallback: claude-code (warning porque el binario falta)
warn "Ningun proveedor disponible (binary 'claude' missing, OPENAI_API_KEY/ANTHROPIC_API_KEY missing) — usando fallback claude-code/sonnet (instala claude CLI)" >&2
echo "claude-code $CLAUDE_CODE_DEFAULT_MODEL"
exit 0