from typing import Optional, List, Dict, Any
from pydantic import BaseModel, Field



# Models
class OptimizeRequest(BaseModel):
    """
    🔧 Explicit optimization request for RAG (Retrieval-Augmented Generation) pipelines.

    Args:
        docs_path (str, optional): 📂 Folder containing your documents for RAG optimization. Default: "data/docs"
        retriever (List[str], optional): 🔍 Retriever type(s) to use. Default: ['faiss']. Example: 'bm25', 'faiss', 'chroma'
        embedding_model (List[str], optional): 🧠 Embedding model(s) to use. Default: ['sentence-transformers/all-MiniLM-L6-v2']
        strategy (List[str], optional): 🎯 RAG strategy to apply. Default: ['fixed']. Options: 'fixed', 'token', 'sentence'
        chunk_sizes (List[int], optional): 📏 List of chunk sizes to evaluate. Default: [200, 400, 600]
        overlaps (List[int], optional): 🔁 List of overlap values to test. Default: [50, 100, 200]
        rerankers (List[str], optional): ⚖️ Rerankers to apply after retrieval. Default: ['mmr']
        search_type (str, optional): 🔍 Search method for parameter exploration. Default: 'grid'. Options: 'grid', 'random', 'bayesian'
        trials (int, optional): 🧪 Number of optimization trials. Default: 5
        metric (str, optional): 📈 Metric to optimize. Default: 'faithfulness'
        validation_choice (str, optional): ✅ Source of validation data. Default: 'generate'. Options: blank (use default), 'generate', local path, HF dataset ID
        llm_model (str, optional): 🤖 LLM used for QA generation if validation_choice='generate'. Default: 'gemini-2.5-flash-lite'
    """
    docs_path: Optional[str] = Field(
        default="data/docs",
        description="📂 Folder containing your documents for RAG optimization. Example: 'data/docs'"
    )
    retriever: Optional[List[str]] = Field(
        description="🔍 Retriever type to use. Example: 'bm25', 'faiss', 'chroma'",
        default=['faiss']
    )
    embedding_model: Optional[List[str]] = Field(
        description="🧠 Embedding model name or path. Example: 'sentence-transformers/all-MiniLM-L6-v2'",
        default=['sentence-transformers/all-MiniLM-L6-v2']
    )
    strategy: Optional[List[str]] = Field(
        description="🎯 RAG strategy name. Example: 'fixed', 'token', 'sentence'",
        default=['fixed']
    )
    chunk_sizes: Optional[List[int]] = Field(
        description="📏 List of chunk sizes to evaluate. Example: [200, 400, 600]",
        default=[200, 400, 600]
    )
    overlaps: Optional[List[int]] = Field(
        description="🔁 List of overlap values to test. Example: [50, 100, 200]",
        default = [50, 100, 200]
    )
    rerankers: Optional[List[str]] = Field(
        default=["mmr"],
        description="⚖️ Rerankers to apply after retrieval. Default: ['mmr']"
    )
    search_type: Optional[str] = Field(
        default="grid",
        description="🔍 Search method to explore parameter space. Options: 'grid', 'random', 'bayesian'"
    )
    trials: Optional[int] = Field(
        default=5,
        description="🧪 Number of optimization trials to run."
    )
    metric: Optional[str] = Field(
        default="faithfulness",
        description="📈 Evaluation metric for optimization. Options: 'faithfulness'"
    )
    validation_choice: Optional[str] = Field(
        default='generate',
        description=(
            "✅ Validation data source. Options:\n"
            "  - Leave blank → use default 'validation_qa.json' if available\n"
            "  - 'generate' → auto-generate a validation QA file from your docs\n"
            "  - Path to a local JSON file (e.g. 'data/validation_qa.json')\n"
            "  - Hugging Face dataset ID (e.g. 'squad')"
        )
    )
    llm_model: Optional[str] = Field(
        default="gemini-2.5-flash-lite",
        description="🤖 LLM used to generate QA dataset when validation_choice='generate'. Example: 'gemini-pro', 'gpt-4o-mini'"
    )



class AutotuneRequest(BaseModel):
    """
    ⚡ Automatically tunes RAG pipeline parameters based on document analysis.

    Args:
        docs_path (str, optional): 📂 Folder containing documents for RAG optimization. Default: "data/docs"
        embedding_model (str, optional): 🧠 Embedding model to analyze. Default: 'sentence-transformers/all-MiniLM-L6-v2'
        num_chunk_pairs (int, optional): 🔢 Number of chunk pairs to analyze. Default: 5
        metric (str, optional): 📈 Metric to optimize. Default: 'faithfulness'
        search_type (str, optional): 🔍 Search method for parameter exploration. Default: 'grid'. Options: 'grid', 'random', 'bayesian'
        trials (int, optional): 🧪 Number of optimization trials. Default: 5
        validation_choice (str, optional): ✅ Source of validation data. Default: 'generate'. Options: blank, 'generate', local path, HF dataset ID
        llm_model (str, optional): 🤖 LLM used for QA generation if validation_choice='generate'. Default: 'gemini-2.5-flash-lite'
    """

    docs_path: Optional[str] = Field(
        default="data/docs",
        description="📂 Folder containing your documents for RAG optimization. Example: 'data/docs'"
    )
    embedding_model: Optional[str] = Field(
        default="sentence-transformers/all-MiniLM-L6-v2",
        description="🧠 Embedding model name or path. Example: 'sentence-transformers/all-MiniLM-L6-v2'"
    )
    num_chunk_pairs: Optional[int] = Field(
        default=5,
        description="🔢 Number of chunk pairs to analyze for tuning."
    )
    metric: Optional[str] = Field(
        default="faithfulness",
        description="📈 Evaluation metric for optimization. Options: 'faithfulness'"
    )
    search_type: Optional[str] = Field(
        default="grid",
        description="🔍 Search method to explore parameter space. Options: 'grid', 'random', 'bayesian'"
    )
    trials: Optional[int] = Field(
        default=5,
        description="🧪 Number of optimization trials to run."
    )
    validation_choice: Optional[str] = Field(
        default='generate',
        description=(
            "✅ Validation data source. Options:\n"
            "  - Leave blank → use default 'validation_qa.jsonl' if available\n"
            "  - 'generate' → auto-generate a validation QA file from your docs\n"
            "  - Path to a local JSON file (e.g. 'data/validation_qa.json')\n"
            "  - Hugging Face dataset ID (e.g. 'squad')"
        )
    )
    llm_model: Optional[str] = Field(
        default="gemini-2.5-flash-lite",
        description="🤖 LLM used to generate QA dataset when validation_choice='generate'. Example: 'gemini-pro', 'gpt-4o-mini'"
    )


class QARequest(BaseModel):
    """
    🧩 Generate a validation QA dataset from documents for RAG evaluation.

    Args:
        docs_path (str): 📂 Folder containing documents. Default: 'data/docs'
        llm_model (str): 🤖 LLM model used for question generation. Default: 'gemini-2.5-flash-lite'
        batch_size (int): 📦 Number of documents per batch. Default: 5
        min_q (int): ❓ Minimum number of questions per document. Default: 3
        max_q (int): ❓ Maximum number of questions per document. Default: 25
    """
    docs_path: str = Field(
        description="📂 Folder containing your documents to generate QA pairs from. Example: 'data/docs'",
        default='data/docs'
    )
    llm_model: str = Field(
        default="gemini-2.5-flash-lite",
        description="🤖 LLM model used for question generation. Example: 'gemini-2.5-flash-lite', 'gpt-4o-mini'"
    )
    batch_size: int = Field(
        default=5,
        description="📦 Number of documents processed per generation batch."
    )
    min_q: int = Field(
        default=3,
        description="❓ Minimum number of questions per document."
    )
    max_q: int = Field(
        default=25,
        description="❓ Maximum number of questions per document."
    )