"""
CLI — user entry point.

Typer interface with -i (input) and -o (output) options.
"""
from __future__ import annotations

import logging
import os
from dataclasses import asdict

import dspy
import typer
from rich.console import Console
from rich.panel import Panel
from rich.table import Table

from prometheus.application.bootstrap import SyntheticBootstrap
from prometheus.application.dto import OptimizationConfig, OptimizationResult
from prometheus.application.evaluator import PromptEvaluator
from prometheus.application.use_cases import OptimizePromptUseCase
from prometheus.infrastructure.file_io import YamlPersistence
from prometheus.infrastructure.judge_adapter import DSPyJudgeAdapter
from prometheus.infrastructure.llm_adapter import DSPyLLMAdapter
from prometheus.infrastructure.proposer_adapter import DSPyProposerAdapter
from prometheus.infrastructure.synth_adapter import DSPySyntheticAdapter

app = typer.Typer(
    name="prometheus",
    help="PROMETHEUS — Prompt evolution without reference data.",
    no_args_is_help=True,
)

console = Console()


@app.command()
def optimize(
    input: str = typer.Option(
        ...,
        "-i",
        "--input",
        help="Path to input YAML config file.",
        exists=True,
        readable=True,
    ),
    output: str = typer.Option(
        "output.yaml",
        "-o",
        "--output",
        help="Path to output YAML result file.",
    ),
    verbose: bool = typer.Option(
        False,
        "-v",
        "--verbose",
        help="Print detailed progress.",
    ),
) -> None:
    """Optimize a prompt without any reference data.

    Usage:
        prometheus optimize -i config.yaml -o result.yaml
    """
    # Configure verbose logging
    if verbose:
        logging.basicConfig(level=logging.INFO, format="[PROMETHEUS] %(message)s")

    console.print(
        Panel.fit(
            "PROMETHEUS — Prompt Evolution Engine",
            subtitle="No reference data required",
        )
    )

    # 1. Load config
    persistence = YamlPersistence()
    raw_config = persistence.read_config(input)
    config = OptimizationConfig(
        seed_prompt=raw_config["seed_prompt"],
        task_description=raw_config["task_description"],
        task_model=raw_config.get("task_model", "openai/gpt-4o-mini"),
        judge_model=raw_config.get("judge_model", "openai/gpt-4o"),
        proposer_model=raw_config.get("proposer_model", "openai/gpt-4o"),
        synth_model=raw_config.get("synth_model", "openai/gpt-4o"),
        max_iterations=raw_config.get("max_iterations", 30),
        n_synthetic_inputs=raw_config.get("n_synthetic_inputs", 20),
        minibatch_size=raw_config.get("minibatch_size", 5),
        seed=raw_config.get("seed", 42),
        output_path=output,
        verbose=verbose,
    )
    console.print(f"[dim]Task: {config.task_description[:80]}...[/dim]")
    console.print(f"[dim]Seed prompt: {config.seed_prompt[:80]}...[/dim]")

    # 2. Configure DSPy with optional api_base/api_key from config
    lm_kwargs: dict = {}
    api_base = raw_config.get("api_base")
    api_key_env = raw_config.get("api_key_env")
    if api_base:
        lm_kwargs["api_base"] = api_base
    if api_key_env:
        lm_kwargs["api_key"] = os.environ.get(api_key_env, "")
    task_lm = dspy.LM(config.task_model, **lm_kwargs)
    dspy.configure(lm=task_lm)

    # 3. Build adapters (Dependency Injection)
    synth_adapter = DSPySyntheticAdapter()
    llm_adapter = DSPyLLMAdapter(model=config.task_model)
    judge_adapter = DSPyJudgeAdapter()
    proposer_adapter = DSPyProposerAdapter()
    bootstrap = SyntheticBootstrap(generator=synth_adapter, seed=config.seed)
    evaluator = PromptEvaluator(executor=llm_adapter, judge=judge_adapter)
    use_case = OptimizePromptUseCase(
        evaluator=evaluator,
        proposer=proposer_adapter,
        bootstrap=bootstrap,
    )

    # 4. Execute
    with console.status("[bold green]Evolving prompt..."):
        result = use_case.execute(config)

    # 5. Display results
    _display_result(result)

    # 6. Save
    _save_result(persistence, output, result)
    console.print(f"\n[green]Results saved to {output}[/green]")


def _display_result(result: OptimizationResult) -> None:
    """Display a Rich summary in the terminal."""
    console.print()
    console.print(
        Panel(
            f"[bold green]Optimized Prompt[/bold green]\n\n{result.optimized_prompt}",
            title="Result",
        )
    )
    table = Table(title="Metrics")
    table.add_column("Metric", style="cyan")
    table.add_column("Value", style="bold")
    table.add_row("Initial Score", f"{result.initial_score:.2f}")
    table.add_row("Final Score", f"{result.final_score:.2f}")
    table.add_row("Improvement", f"{result.improvement:+.2f}")
    table.add_row("Iterations", str(result.iterations_used))
    table.add_row("LLM Calls", str(result.total_llm_calls))
    console.print(table)


def _save_result(
    persistence: YamlPersistence,
    path: str,
    result: OptimizationResult,
) -> None:
    """Save the result as YAML."""
    persistence.write_result(path, asdict(result))


@app.command(hidden=True)
def _help() -> None:
    """Internal placeholder to force multi-command Typer behavior."""
    pass


if __name__ == "__main__":
    app()