# Quotation Semantic Layer - Data Flow DAG
# SAP Source -> Snowflake -> dbt Transforms -> Semantic Views -> Cortex -> Chatbot Output

graph LR
    SAP["🗄️ SAP ERP System<br/>(Sales & Discount Data)"]
    
    EXT["📥 Snowflake<br/>External Stage"]
    
    RAW["raw.quotations<br/>raw.discount_conditions"]
    
    STG["STAGING Layer<br/>stg_quotes<br/>stg_discount_conditions<br/>stg_product_master"]
    
    TRF["TRANSFORM Layer<br/>trf_quotation<br/>trf_chatbot_quotation"]
    
    DIM["Reference Dimensions<br/>dim_customer_discount_policy<br/>dim_product_portfolio<br/>fct_agreement_discounts"]
    
    SEMA["SEMANTIC LAYER<br/>sv_quotation<br/>sv_chatbot_quotation"]
    
    CORTEX["Cortex Analytics<br/>Guardrails & Information Protection<br/>Access Control<br/>Freshness Contract"]
    
    UI["Snowflake UI<br/>(BI Dashboard)"]
    CHAT["🤖 Internal Workspace<br/>(Chatbot)"]
    
    SAP -->|Daily Batch 05:00 UTC| EXT
    EXT -->|Load| RAW
    
    RAW -->|Column mapping<br/>Type casting| STG
    
    STG -->|Join dimensions<br/>Calculate discounts<br/>Apply governance flags| TRF
    DIM -->|Enrich with policies| TRF
    
    TRF -->|Expose semantic<br/>business logic<br/>Hide implementation| SEMA
    
    SEMA -->|Apply guardrails<br/>Protect sensitive information<br/>Enforce freshness| CORTEX
    
    CORTEX -->|Query & Visualize| UI
    CORTEX -->|LLM consumption<br/>Prompt engineering layer| CHAT
    
    CHAT -->|<1 min<br/>Quote Answers| USER["👤 Sales & Ops<br/>Team"]
    UI -->|Dashboard<br/>Reporting| OPS["📊 Operations<br/>Team"]
    
    SEMA -.->|Data Contract<br/>Lineage| AUDIT["🔒 Audit & Compliance<br/>- Access logs<br/>- Policy changes<br/>- Exception escalations"]
    
    style SAP fill:#d4a574
    style CORTEX fill:#ff9999
    style SEMA fill:#99ccff
    style CHAT fill:#99ff99
    style USER fill:#ffcc99
    style AUDIT fill:#cc99ff

classDef layer_raw fill:#e1e4e8
classDef layer_stg fill:#d0d7de
classDef layer_trf fill:#adb8c1
classDef layer_sema fill:#6e7681

class RAW layer_raw
class STG layer_stg
class TRF layer_trf
class SEMA layer_sema