flowchart LR
%% Main flow
User([User Query]) --> Client["MCP Client
(MultiServerMCPClient)"]

%% Client to Router communication
Client -->Router["Question Router
(Strategy Selector)"]

%% Router to Strategy selection
Router -->|"Applies strategy
based on level"| ReAct["ReAct Agent
(LangGraph)"]

%% Server section with detailed communication
subgraph Servers["MCP Servers (Protocol-based Tool Providers)"]
	direction LR
	ReAct -->|"Tool calls"| Math["Math Server
	(add, multiply, divide)"]
	Math -->|"Calculation results"| ReAct
	
	ReAct -->|"Tool calls"| Finance["Finance Server
	(EPS, profit margins)"]
	Finance -->|"Financial metrics"| ReAct
	
	ReAct -->|"Search queries"| Chroma["Chroma Server
	(document retrieval)"]
	Chroma -->|"Relevant text chunks"| ReAct
	
	ReAct -->|"SQL queries"| SQLite["SQLite Server
	(company data)"]
	SQLite -->|"Structured data"| ReAct
end

%% Database connections with data flow details
subgraph Databases["Data Sources"]
	direction LR
	Chroma -->|"Vector search"| ChromaDB[(Vector DB
	Financial reports)]
	ChromaDB -->|"Matching documents"| Chroma
	
	SQLite -->|"SQL queries"| CompanyDB[(Company DB
	Corporate data)]
	CompanyDB -->|"Query results"| SQLite
end

%% Final answer flow
ReAct -->|"Generated answer"| Answer([Final Answer])

%% Styling with rounded corners
classDef userNode fill:#ffebee,stroke:#c62828,color:#c62828,stroke-width:2px,rx:20,ry:20;
classDef clientNode fill:#e8eaf6,stroke:#3f51b5,color:#3f51b5,stroke-width:2px,rx:10,ry:10;
classDef reactNode fill:#b2dfdb,stroke:#00796b,color:#00796b,stroke-width:2px,rx:10,ry:10;
classDef serverNode fill:#f5f5f5,stroke:#424242,color:#424242,stroke-width:2px,rx:5,ry:5;
classDef dbNode fill:#ede7f6,stroke:#4527a0,color:#4527a0,stroke-width:2px,rx:0,ry:0;
classDef answerNode fill:#e8f5e9,stroke:#2e7d32,color:#2e7d32,stroke-width:2px,rx:20,ry:20;
classDef subgraphStyle fill:#fafafa,stroke:#9e9e9e,stroke-width:1px,rx:10,ry:10,color:#424242;

%% Apply styles
class User userNode;
class Client clientNode;
class ReAct reactNode;
class Math,Finance,Chroma,SQLite serverNode;
class ChromaDB,CompanyDB dbNode;
class Answer answerNode;
class Servers,Databases subgraphStyle;
						

flowchart LR
  A[Incoming Question] --> B[LLM Question Analyzer]
  B --> C{Difficulty Assessment}
  
  C -->|"Simple fact retrieval 
  (single data point lookup)"|L1[Level 1]
  
  C -->|"Simple calculations 
  on single document"|L2[Level 2]
  
  C -->|"Multi-step calculations
  or temporal reasoning"|L3[Level 3]
  
  C -->|"Calculations involving
  multiple documents/companies"|L4[Level 4]
  
  C -->|"Complex reasoning with
  multiple factors/filtering"|L5[Level 5]

  %% Processing strategies with details
  L1 --> P1[Simple RAG Strategy]
  L2 --> P1
  L3 --> P2[Tool-First Strategy]
  L4 --> P2
  L5 --> P3[Agentic RAG Strategy]
  
  P1 -->|"Direct retrieval +
  concise numerical answer"|Result1[Answer]
  
  P2 -->|"Extract metrics → Temporal alignment → Retrieve data →
  Calculate "|Result2[Answer]
  
  P3 -->|"Entity identification → Data gathering →
  Calculation → Comparison"|Result3[Answer]

  %% Styling
  classDef level1 fill:#e0f7fa,stroke:#0288d1;
  classDef level2 fill:#e8f5e9,stroke:#2e7d32;
  classDef level3 fill:#fff3e0,stroke:#fb8c00;
  classDef level4 fill:#ede7f6,stroke:#5e35b1;
  classDef level5 fill:#ffebee,stroke:#d32f2f;
  classDef process fill:#f5f5f5,stroke:#333,stroke-dasharray:4 2;
  classDef llm fill:#f8bbd0,stroke:#880e4f;

  class L1 level1
  class L2 level2
  class L3 level3
  class L4 level4
  class L5 level5
  class P1,P2,P3 process
  class B,C llm