# ============================================================================
# Open-Tutor Environment Configuration
# ============================================================================
# Copy this file to .env and fill in your API keys and settings.
# All API keys should be kept confidential and never committed to version control.
# ============================================================================

# ============================================================================
# LLM (Large Language Model) Configuration
# ============================================================================
# Configure the main AI model used for reasoning, generation, and conversation.
# Supports OpenAI-compatible APIs (OpenAI, Azure OpenAI, DeepSeek, Qwen, etc.)

# LLM service provider type
# Options: openai, azure_openai, ollama, lollms
LLM_BINDING=openai

# Model name for the LLM
# Examples: gpt-4o, gpt-4o-mini, deepseek-chat, qwen-plus, claude-3-5-sonnet
LLM_MODEL=

# LLM API endpoint URL
# OpenAI: https://api.openai.com/v1
# Azure OpenAI: https://YOUR_RESOURCE.openai.azure.com
# DeepSeek: https://api.deepseek.com
# Alibaba Qwen: https://dashscope.aliyuncs.com/compatible-mode/v1
LLM_BINDING_HOST=

# LLM API authentication key
LLM_BINDING_API_KEY=

# Disable SSL certificate verification (set 'true' for self-signed certificates)
DISABLE_SSL_VERIFY=false

# ============================================================================
# Embedding Model Configuration
# ============================================================================
# Configure the text embedding model used for semantic search and RAG.
# Required for knowledge base functionality.

# Embedding service provider type
# Options: openai, azure_openai, ollama, lollms
EMBEDDING_BINDING=openai

# Embedding model name
# Examples: text-embedding-3-large, text-embedding-3-small, text-embedding-ada-002
EMBEDDING_MODEL=text-embedding-3-large

# Embedding vector dimension
EMBEDDING_DIM=3072

# Embedding API endpoint URL (same format as LLM_BINDING_HOST)
EMBEDDING_BINDING_HOST=

# Embedding API authentication key
EMBEDDING_BINDING_API_KEY=

# ============================================================================
# TTS (Text-to-Speech) Configuration
# ============================================================================
# Configure voice synthesis for the Co-Writer narration feature.
# Currently only supports Alibaba Cloud DashScope TTS service.

# TTS model name
TTS_MODEL=

# TTS API endpoint URL
TTS_URL=

# TTS API authentication key
TTS_API_KEY=

# ============================================================================
# Web Search Configuration
# ============================================================================
# Configure external search APIs for research features.
# Perplexity API key for web search functionality
# Get your API key at: https://www.perplexity.ai/settings/api
PERPLEXITY_API_KEY=

# ============================================================================
# Logging Configuration
# ============================================================================

# Log level for RAG tool module
# Options: DEBUG, INFO, WARNING, ERROR
RAG_TOOL_MODULE_LOG_LEVEL=INFO