"""Evaluation CLI commands."""

from __future__ import annotations

from collections.abc import Callable

import click

from .main import main


@main.group()
def evals() -> None:
    """Memory evaluation commands.

    \b
    Examples:
        headroom evals memory       Run LoCoMo memory evaluation
        headroom evals memory-v2    Run V2 evaluation with LLM-controlled tools
    """
    pass


@evals.command("memory")
@click.option(
    "--n-conversations",
    "-n",
    type=int,
    help="Number of conversations to evaluate (default: all 10)",
)
@click.option(
    "--categories",
    help="Comma-separated list of categories 1-5 (default: 1,2,3,4)",
)
@click.option(
    "--include-adversarial",
    is_flag=True,
    help="Include category 5 (unanswerable questions)",
)
@click.option(
    "--top-k",
    type=int,
    default=10,
    help="Number of memories to retrieve per question (default: 10)",
)
@click.option(
    "--f1-threshold",
    type=float,
    default=0.5,
    help="F1 score threshold for 'correct' (default: 0.5)",
)
@click.option(
    "--answer-model",
    help="LLM model for generating answers (e.g., gpt-4o, claude-sonnet-4-20250514)",
)
@click.option(
    "--llm-judge",
    is_flag=True,
    help="Use LLM-as-judge scoring",
)
@click.option(
    "--judge-provider",
    type=click.Choice(["openai", "anthropic", "litellm", "simple"]),
    default="litellm",
    help="LLM judge provider (default: litellm - uses same model as answer-model)",
)
@click.option(
    "--judge-model",
    default="gpt-4o",
    help="Model for LLM judge (default: gpt-4o)",
)
@click.option(
    "--output",
    "-o",
    help="Path to save JSON results",
)
@click.option(
    "--no-extract",
    is_flag=True,
    help="Disable LLM memory extraction (store raw dialogue instead)",
)
@click.option(
    "--extraction-model",
    default="gpt-4o-mini",
    help="Model for memory extraction (default: gpt-4o-mini)",
)
@click.option(
    "--pass-all",
    is_flag=True,
    help="Pass ALL memories to LLM (Path A: no retrieval bottleneck)",
)
@click.option(
    "--parallel",
    type=int,
    default=10,
    help="Number of parallel workers for LLM calls (default: 10)",
)
@click.option(
    "--debug",
    is_flag=True,
    help="Enable debug logging (saved to results JSON)",
)
def memory_eval(
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    top_k: int,
    f1_threshold: float,
    answer_model: str | None,
    llm_judge: bool,
    judge_provider: str,
    judge_model: str,
    output: str | None,
    no_extract: bool,
    extraction_model: str,
    pass_all: bool,
    parallel: int,
    debug: bool,
) -> None:
    """Run LoCoMo memory evaluation benchmark.

    \b
    LoCoMo (Long-term Conversational Memory) tests memory across:
    - Single-hop questions (simple fact recall)
    - Temporal questions (time-based)
    - Multi-hop questions (reasoning across memories)
    - Open-domain questions (interpretation required)

    \b
    Examples:
        headroom evals memory -n 3
        headroom evals memory --answer-model gpt-4o --llm-judge
    """
    _run_memory_eval(
        n_conversations=n_conversations,
        categories=categories,
        include_adversarial=include_adversarial,
        top_k=top_k,
        f1_threshold=f1_threshold,
        answer_model=answer_model,
        llm_judge=llm_judge,
        judge_provider=judge_provider,
        judge_model=judge_model,
        output=output,
        no_extract=no_extract,
        extraction_model=extraction_model,
        pass_all=pass_all,
        parallel=parallel,
        debug=debug,
    )


@evals.command("memory-v2")
@click.option(
    "--n-conversations",
    "-n",
    type=int,
    help="Number of conversations to evaluate (default: all 10)",
)
@click.option(
    "--categories",
    help="Comma-separated list of categories 1-5 (default: 1,2,3,4)",
)
@click.option(
    "--include-adversarial",
    is_flag=True,
    help="Include category 5 (unanswerable questions)",
)
@click.option(
    "--f1-threshold",
    type=float,
    default=0.5,
    help="F1 score threshold for 'correct' (default: 0.5)",
)
@click.option(
    "--save-model",
    default="gpt-4o-mini",
    help="LLM model for deciding what to save (default: gpt-4o-mini)",
)
@click.option(
    "--answer-model",
    default="gpt-4o",
    help="LLM model for answering questions (default: gpt-4o)",
)
@click.option(
    "--max-results",
    type=int,
    default=10,
    help="Maximum memories to retrieve per search (default: 10)",
)
@click.option(
    "--no-graph",
    is_flag=True,
    help="Disable graph expansion in search",
)
@click.option(
    "--llm-judge",
    is_flag=True,
    help="Use LLM-as-judge scoring",
)
@click.option(
    "--judge-model",
    default="gpt-4o",
    help="Model for LLM judge (default: gpt-4o)",
)
@click.option(
    "--output",
    "-o",
    help="Path to save JSON results",
)
@click.option(
    "--parallel",
    type=int,
    default=5,
    help="Number of parallel workers for LLM calls (default: 5)",
)
@click.option(
    "--debug",
    is_flag=True,
    help="Enable debug logging (saved to results JSON)",
)
def memory_eval_v2(
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    f1_threshold: float,
    save_model: str,
    answer_model: str,
    max_results: int,
    no_graph: bool,
    llm_judge: bool,
    judge_model: str,
    output: str | None,
    parallel: int,
    debug: bool,
) -> None:
    """Run LoCoMo V2 evaluation with LLM-controlled memory tools.

    \b
    This evaluator tests the new architecture where:
    - LLM decides what to save (memory_save tool)
    - LLM decides when to search (memory_search tool)
    - Graph relationships enable multi-hop reasoning

    \b
    Examples:
        headroom evals memory-v2 -n 3
        headroom evals memory-v2 --answer-model gpt-4o --save-model gpt-4o-mini
    """
    _run_memory_eval_v2(
        n_conversations=n_conversations,
        categories=categories,
        include_adversarial=include_adversarial,
        f1_threshold=f1_threshold,
        save_model=save_model,
        answer_model=answer_model,
        max_results=max_results,
        no_graph=no_graph,
        llm_judge=llm_judge,
        judge_model=judge_model,
        output=output,
        parallel=parallel,
        debug=debug,
    )


# -----------------------------------------------------------------------------
# Backwards compatibility: old command names (hidden)
# -----------------------------------------------------------------------------


@main.command("memory-eval", hidden=True)
@click.option("--n-conversations", "-n", type=int)
@click.option("--categories")
@click.option("--include-adversarial", is_flag=True)
@click.option("--top-k", type=int, default=10)
@click.option("--f1-threshold", type=float, default=0.5)
@click.option("--answer-model")
@click.option("--llm-judge", is_flag=True)
@click.option(
    "--judge-provider",
    type=click.Choice(["openai", "anthropic", "litellm", "simple"]),
    default="litellm",
)
@click.option("--judge-model", default="gpt-4o")
@click.option("--output", "-o")
@click.option("--no-extract", is_flag=True)
@click.option("--extraction-model", default="gpt-4o-mini")
@click.option("--pass-all", is_flag=True)
@click.option("--parallel", type=int, default=10)
@click.option("--debug", is_flag=True)
def memory_eval_compat(
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    top_k: int,
    f1_threshold: float,
    answer_model: str | None,
    llm_judge: bool,
    judge_provider: str,
    judge_model: str,
    output: str | None,
    no_extract: bool,
    extraction_model: str,
    pass_all: bool,
    parallel: int,
    debug: bool,
) -> None:
    """Deprecated: Use 'headroom evals memory' instead."""
    click.echo("Note: 'memory-eval' is deprecated. Use 'headroom evals memory'", err=True)
    _run_memory_eval(
        n_conversations=n_conversations,
        categories=categories,
        include_adversarial=include_adversarial,
        top_k=top_k,
        f1_threshold=f1_threshold,
        answer_model=answer_model,
        llm_judge=llm_judge,
        judge_provider=judge_provider,
        judge_model=judge_model,
        output=output,
        no_extract=no_extract,
        extraction_model=extraction_model,
        pass_all=pass_all,
        parallel=parallel,
        debug=debug,
    )


@main.command("memory-eval-v2", hidden=True)
@click.option("--n-conversations", "-n", type=int)
@click.option("--categories")
@click.option("--include-adversarial", is_flag=True)
@click.option("--f1-threshold", type=float, default=0.5)
@click.option("--save-model", default="gpt-4o-mini")
@click.option("--answer-model", default="gpt-4o")
@click.option("--max-results", type=int, default=10)
@click.option("--no-graph", is_flag=True)
@click.option("--llm-judge", is_flag=True)
@click.option("--judge-model", default="gpt-4o")
@click.option("--output", "-o")
@click.option("--parallel", type=int, default=5)
@click.option("--debug", is_flag=True)
def memory_eval_v2_compat(
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    f1_threshold: float,
    save_model: str,
    answer_model: str,
    max_results: int,
    no_graph: bool,
    llm_judge: bool,
    judge_model: str,
    output: str | None,
    parallel: int,
    debug: bool,
) -> None:
    """Deprecated: Use 'headroom evals memory-v2' instead."""
    click.echo("Note: 'memory-eval-v2' is deprecated. Use 'headroom evals memory-v2'", err=True)
    _run_memory_eval_v2(
        n_conversations=n_conversations,
        categories=categories,
        include_adversarial=include_adversarial,
        f1_threshold=f1_threshold,
        save_model=save_model,
        answer_model=answer_model,
        max_results=max_results,
        no_graph=no_graph,
        llm_judge=llm_judge,
        judge_model=judge_model,
        output=output,
        parallel=parallel,
        debug=debug,
    )


# -----------------------------------------------------------------------------
# Implementation functions (shared by new and compat commands)
# -----------------------------------------------------------------------------


def _run_memory_eval(
    *,
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    top_k: int,
    f1_threshold: float,
    answer_model: str | None,
    llm_judge: bool,
    judge_provider: str,
    judge_model: str,
    output: str | None,
    no_extract: bool,
    extraction_model: str,
    pass_all: bool,
    parallel: int,
    debug: bool,
) -> None:
    """Run LoCoMo memory evaluation."""
    # Suppress noisy pydantic warnings from litellm
    import warnings

    warnings.filterwarnings("ignore", message=".*Pydantic serializer warnings.*")
    warnings.filterwarnings("ignore", category=UserWarning, module="pydantic")

    try:
        from headroom.evals.memory import (
            LoCoMoEvaluator,
            MemoryEvalConfig,
            create_anthropic_judge,
            create_litellm_judge,
            create_openai_judge,
            simple_judge,
        )
        from headroom.memory import MemoryConfig
    except ImportError as e:
        click.echo("Error: Memory eval dependencies not installed.")
        click.echo("Run: pip install headroom[memory,evals]")
        click.echo(f"Details: {e}")
        raise SystemExit(1) from None

    import asyncio

    # Build configuration
    parsed_categories = None
    if categories:
        parsed_categories = [int(c) for c in categories.split(",")]

    memory_config = MemoryConfig()

    eval_config = MemoryEvalConfig(
        n_conversations=n_conversations,
        categories=parsed_categories,
        skip_adversarial=not include_adversarial,
        top_k_memories=top_k,
        llm_judge_enabled=llm_judge,
        llm_judge_model=judge_model,
        memory_config=memory_config,
        f1_threshold=f1_threshold,
        extract_memories=not no_extract,
        extraction_model=extraction_model,
        pass_all_memories=pass_all,
        parallel_workers=parallel,
        debug=debug,
    )

    # Create answer function based on provider
    answer_fn = None
    if answer_model:
        try:
            import litellm

            def answer_fn(question: str, memories: list[str]) -> str:
                if not memories:
                    return "I don't have information about that."

                # Format memories - use all if pass_all, else top 10
                context = "\n".join(f"- {m}" for m in memories)

                prompt = f"""You are answering questions about a conversation between two people based on extracted memories/facts.

## Memories from the conversation:
{context}

## Question: {question}

## Instructions:
1. Find the specific fact(s) in the memories that answer this question
2. Answer with JUST the key information requested - be concise
3. For "when" questions: give the specific date if mentioned (e.g., "7 May 2023", "2022")
4. For "what" questions: give the specific thing/action
5. For "who" questions: give the name
6. If the exact answer is in the memories, use those exact words/dates
7. If you cannot find the answer, say "Information not found"

## Answer (be concise - just the facts):"""

                response = litellm.completion(
                    model=answer_model,
                    messages=[{"role": "user", "content": prompt}],
                    temperature=0.0,
                    max_tokens=150,
                )
                return response.choices[0].message.content or ""

        except ImportError:
            click.echo("Error: litellm required for --answer-model. Run: pip install litellm")
            raise SystemExit(1) from None

    # Create LLM judge if enabled
    llm_judge_fn: Callable[[str, str, str], tuple[float, str]] | None = None
    if llm_judge:
        # Use answer model for judge if not explicitly set
        effective_judge_model = judge_model
        if answer_model and judge_model == "gpt-4o":
            effective_judge_model = answer_model  # Match the answer model

        if judge_provider == "simple":
            llm_judge_fn = simple_judge
        elif judge_provider == "openai":
            llm_judge_fn = create_openai_judge(model=effective_judge_model)
        elif judge_provider == "anthropic":
            llm_judge_fn = create_anthropic_judge(model=effective_judge_model)
        else:
            llm_judge_fn = create_litellm_judge(model=effective_judge_model)

    # Determine judge info for display
    judge_info = "DISABLED"
    if llm_judge:
        if judge_provider == "simple":
            judge_info = "ENABLED (rule-based F1)"
        else:
            jm = judge_model
            if answer_model and judge_model == "gpt-4o":
                jm = answer_model
            judge_info = f"ENABLED ({judge_provider}: {jm})"

    extract_info = f"ENABLED ({extraction_model})" if not no_extract else "DISABLED (raw dialogue)"
    retrieval_info = "ALL memories (Path A)" if pass_all else f"Top-{top_k} retrieval"

    click.echo(f"""
╔═══════════════════════════════════════════════════════════════════════╗
║                    HEADROOM MEMORY EVALUATION                          ║
║                         LoCoMo Benchmark                               ║
╚═══════════════════════════════════════════════════════════════════════╝

Configuration:
  Conversations:    {n_conversations or "all"}
  Categories:       {parsed_categories or "[1,2,3,4]"}
  Retrieval:        {retrieval_info}
  Memory Extract:   {extract_info}
  Answer Model:     {answer_model or "default (retrieval)"}
  LLM Judge:        {judge_info}
  Parallelism:      {parallel} workers
  Debug:            {"ENABLED" if debug else "DISABLED"}

Running evaluation...
""")

    # Run evaluation
    evaluator = LoCoMoEvaluator(
        answer_fn=answer_fn,
        llm_judge_fn=llm_judge_fn,
        config=eval_config,
    )

    try:
        result = asyncio.run(evaluator.run())
    except KeyboardInterrupt:
        click.echo("\nEvaluation interrupted.")
        raise SystemExit(1) from None

    # Print results
    click.echo(result.summary())

    # Save results if output path specified
    if output:
        result.save(output)
        click.echo(f"\nResults saved to: {output}")


def _run_memory_eval_v2(
    *,
    n_conversations: int | None,
    categories: str | None,
    include_adversarial: bool,
    f1_threshold: float,
    save_model: str,
    answer_model: str,
    max_results: int,
    no_graph: bool,
    llm_judge: bool,
    judge_model: str,
    output: str | None,
    parallel: int,
    debug: bool,
) -> None:
    """Run LoCoMo V2 memory evaluation (LLM-controlled tools)."""
    # Suppress noisy pydantic warnings from litellm
    import warnings

    warnings.filterwarnings("ignore", message=".*Pydantic serializer warnings.*")
    warnings.filterwarnings("ignore", category=UserWarning, module="pydantic")

    try:
        from headroom.evals.memory import (
            LoCoMoEvaluatorV2,
            MemoryEvalConfigV2,
        )
    except ImportError as e:
        click.echo("Error: Memory eval V2 dependencies not installed.")
        click.echo("Run: pip install headroom[memory,evals]")
        click.echo(f"Details: {e}")
        raise SystemExit(1) from None

    import asyncio

    # Build configuration
    parsed_categories = None
    if categories:
        parsed_categories = [int(c) for c in categories.split(",")]

    eval_config = MemoryEvalConfigV2(
        n_conversations=n_conversations,
        categories=parsed_categories,
        skip_adversarial=not include_adversarial,
        llm_judge_enabled=llm_judge,
        llm_judge_model=judge_model,
        f1_threshold=f1_threshold,
        parallel_workers=parallel,
        debug=debug,
        save_model=save_model,
        answer_model=answer_model,
        max_search_results=max_results,
        include_graph_expansion=not no_graph,
    )

    click.echo(f"""
╔═══════════════════════════════════════════════════════════════════════╗
║                   HEADROOM MEMORY EVALUATION V2                        ║
║              LLM-Controlled Memory Architecture                        ║
╚═══════════════════════════════════════════════════════════════════════╝

Configuration:
  Conversations:    {n_conversations or "all"}
  Categories:       {parsed_categories or "[1,2,3,4]"}
  Save Model:       {save_model}
  Answer Model:     {answer_model}
  Max Results:      {max_results}
  Graph Expansion:  {"DISABLED" if no_graph else "ENABLED"}
  LLM Judge:        {"ENABLED" if llm_judge else "DISABLED"}
  Parallelism:      {parallel} workers
  Debug:            {"ENABLED" if debug else "DISABLED"}

Key Differences from V1:
  - LLM decides WHAT to save (memory_save tool)
  - LLM decides HOW to search (memory_search tool)
  - Graph expansion enables multi-hop reasoning

Running evaluation...
""")

    # Run evaluation
    evaluator = LoCoMoEvaluatorV2(
        answer_model=answer_model,
        config=eval_config,
    )

    try:
        result = asyncio.run(evaluator.run())
    except KeyboardInterrupt:
        click.echo("\nEvaluation interrupted.")
        raise SystemExit(1) from None

    # Print results
    click.echo(result.summary())

    # Save results if output path specified
    if output:
        result.save(output)
        click.echo(f"\nResults saved to: {output}")