from __future__ import annotations

from pathlib import Path

import typer
from rich.console import Console

from skylattice.core.decisions import explain_path
from skylattice.core.intent import load_intent
from skylattice.core.paths import find_customer_root, get_by_path

console = Console()


def run(
    path_key: str = typer.Option(..., "--path", help="Intent path, e.g. domains.finance"),
    project: Path | None = typer.Option(None, "--project", help="Customer project directory"),
) -> None:
    """Explain why a path looks the way it does (intent value + decisions)."""
    customer_root = project.resolve() if project else find_customer_root()
    intent = load_intent(customer_root)

    parts = path_key.split(".")
    value = get_by_path(intent, path_key)
    if value is None and parts and parts[0] == "domains" and len(parts) >= 2:
        for d in intent.get("domains") or []:
            if d.get("name") == parts[1]:
                value = d if len(parts) == 2 else d.get(parts[2])
                break

    console.print(f"[bold]{path_key}[/bold] = {value!r}")

    if parts and parts[0] == "domains" and len(parts) >= 2:
        for d in intent.get("domains") or []:
            if d.get("name") == parts[1]:
                console.print(f"domain record: {d}")

    matches = explain_path(customer_root, path_key)
    if not matches:
        console.print("[dim]No linked decisions.[/dim]")
        return
    for d in matches:
        console.print(f"[green]decision[/green] {d.get('id')} [{d.get('status')}] expires={d.get('expires_on')}")
        console.print(f"  {d.get('rationale')}")