appFlow

graph TD
    A[Customer] -->|Interacts with| B[React Frontend]
    B -->|Sends Queries| C[Node.js API Gateway]
    C -->|Authentication| D[Auth Service]
    C -->|Query Processing| E[Python NLP Service]
    E -->|Intent Recognition| F[NLTK/Hugging Face Models]
    E -->|Context Management| G[Session State Handler]
    E -->|Knowledge Retrieval| H[FAISS Vector Store]
    H -->|Stores| I[Embedded Documents]
    E -->|Response Generation| J[LangChain Orchestrator]
    J -->|API Calls| K[OpenAI GPT-4o]
    J -->|Fallback Logic| L[Predefined Responses]
    C -->|Logs Interactions| M[MongoDB]
    M -->|Powers| N[Analytics Service]
    N -->|Displays| O[Admin Dashboard]
    C -->|Integration| P[Enterprise Ticketing System]
    P -->|Human Escalation| Q[Support Agent Interface]

    classDef frontend fill:#f9d6ff,stroke:#333,stroke-width:2px
    classDef backend fill:#d0e0ff,stroke:#333,stroke-width:2px
    classDef database fill:#fdf5dd,stroke:#333,stroke-width:2px
    classDef ai fill:#d4ffea,stroke:#333,stroke-width:2px
    classDef external fill:#ffd6cc,stroke:#333,stroke-width:2px

    class A,B frontend
    class C,D,E,G,J,N frontend
    class M,H,I database
    class F,K ai
    class P,Q external