# =============================================================================
# NexaMind AI - Environment Configuration
# =============================================================================
# Copy this file to ".env" and fill in the values you have.
# You do NOT need all three AI providers configured - NexaMind AI will
# gracefully work with whichever ones you provide, and will show a clear
# message if none are configured at all.
#
# NEVER commit your real ".env" file to Git. It is already listed in
# .gitignore for you.
# =============================================================================

# ---- AI Provider API Keys ---------------------------------------------------
# OpenAI: https://platform.openai.com/api-keys
OPENAI_API_KEY=

# Anthropic Claude: https://console.anthropic.com/settings/keys
ANTHROPIC_API_KEY=

# Google Gemini: https://aistudio.google.com/app/apikey
GEMINI_API_KEY=

# ---- AI Model Selection (optional - sensible defaults are used) -----------
OPENAI_MODEL=gpt-4o-mini
ANTHROPIC_MODEL=claude-3-5-sonnet-20241022
GEMINI_MODEL=gemini-1.5-flash
OPENAI_EMBEDDING_MODEL=text-embedding-3-small
GEMINI_EMBEDDING_MODEL=models/embedding-001

# ---- Server configuration --------------------------------------------------
# Render provides PORT automatically. Locally it defaults to 8000.
PORT=8000
HOST=0.0.0.0
ENVIRONMENT=development

# ---- Advanced (optional) ----------------------------------------------------
AI_REQUEST_TIMEOUT=45
MAX_UPLOAD_SIZE_MB=15
CHUNK_SIZE_CHARS=1200
CHUNK_OVERLAP_CHARS=200
RAG_TOP_K=4
MAX_HISTORY_MESSAGES=20