#!/usr/bin/env python3

import ast
import shutil
import subprocess
import sys
from pathlib import Path

from rich.console import Console
from rich.table import Table

console = Console()


def info(msg: str) -> None:
    console.print(f"{msg}")


def ok(msg: str) -> None:
    console.print(f"[green]✔ {msg}[/]")


def warn(msg: str) -> None:
    console.print(f"[yellow]▲ {msg}[/]")


def die(msg: str, code: int = 1) -> None:
    console.print(f"[bold red]✖ {msg}[/]")
    sys.exit(code)


def usage() -> None:
    prog = Path(sys.argv[0]).name
    console.print(
        f"[blue]Uso:[/blue] {prog} [cyan]<NOMEROBOT>[/cyan] [cyan]<NOMEFILE>[/cyan]\n"
    )
    # console.print(
    #     "  NOMEROBOT  Variabile in robots.py (es. cbrobot) oppure nome hub BLE (es. cbhub)"
    # )
    # console.print("  NOMEFILE   File .py da inviare al hub con pybricksdev\n")
    # console.print(
    #     f"  Esempi:\n    {prog} cbrobot guidaavantieindietro.py\n    {prog} cbhub   menu.py"
    # )


def ensure_project_layout() -> None:
    missing = []
    if not Path("robot_class.py").is_file():
        missing.append("robot_class.py")
    if not Path(".scripts").is_dir():
        missing.append(".scripts/")
    if missing:
        die("Non sei nella cartella giusta: mancano " + ", ".join(missing), code=9)


def parse_robots_py(robots_py: Path) -> dict[str, str]:
    """Ritorna {variabile: hub_name} da assegnazioni tipo: X = LazyRobot(..., name='hub', ...)."""
    if not robots_py.exists():
        die(f"File non trovato: {robots_py}", code=3)

    try:
        tree = ast.parse(robots_py.read_text(encoding="utf-8"), filename=str(robots_py))
    except SyntaxError as e:
        die(f"robots.py non parsabile: {e}", code=3)

    mapping: dict[str, str] = {}
    for node in tree.body:
        if not isinstance(node, ast.Assign):
            continue
        if len(node.targets) != 1 or not isinstance(node.targets[0], ast.Name):
            continue
        var = node.targets[0].id
        call = node.value
        if not isinstance(call, ast.Call):
            continue
        func = call.func
        if not (isinstance(func, ast.Name) and func.id == "LazyRobot"):
            continue
        hub_name = None
        for kw in call.keywords:
            if (
                kw.arg == "name"
                and isinstance(kw.value, ast.Constant)
                and isinstance(kw.value.value, str)
            ):
                hub_name = kw.value.value
                break
        if hub_name:
            mapping[var] = hub_name

    if not mapping:
        die("Nessun robot trovato in robots.py (LazyRobot(..., name=...)).", code=3)
    return mapping


def choose_robot(mapping: dict[str, str], ident: str) -> tuple[str, str]:
    """Accetta variabile o hub. Ritorna (var_name, hub_name)."""
    ident_lc = ident.strip().lower()
    for var, hub in mapping.items():
        if var.lower() == ident_lc:
            return var, hub
    for var, hub in mapping.items():
        if hub.lower() == ident_lc:
            return var, hub
    warn(f"Robot '{ident}' non trovato in robots.py.")
    table = Table(title="Robot conosciuti (da robots.py)")
    table.add_column("Variabile", style="cyan", no_wrap=True)
    table.add_column("Nome hub (BLE)", style="green")
    for var, hub in mapping.items():
        table.add_row(var, hub)
    console.print(table)
    sys.exit(4)


def write_robot_local(robot_local: Path, var_name: str) -> None:
    """Crea/sovrascrive robot_local.py."""
    header = (
        "# robot_local.py — generato automaticamente da pbd.py\n"
        "# Non commitare questo file: deve essere nel .gitignore.\n"
    )
    body = f"from robots import {var_name} as robot\n"
    try:
        robot_local.write_text(header + body, encoding="utf-8")
    except Exception as e:
        die(f"Impossibile scrivere {robot_local}: {e}")


def run_pybricksdev(file_path: Path, hub_name: str) -> int:
    if not file_path.exists():
        die(f"File target da inviare non trovato: {file_path}", code=6)
    exe = shutil.which("pybricksdev")
    if exe is None:
        die("Comando 'pybricksdev' non trovato nel PATH. Installalo e riprova.", code=7)
    cmd = [exe, "run", "ble", str(file_path), "--name", hub_name]
    return subprocess.run(cmd, check=False).returncode


def main() -> None:
    # argv: 0=prog, 1=nomerobot, 2=nomefile
    if len(sys.argv) < 3 or len(sys.argv) > 3:
        usage()
        die("Parametri errati: servono esattamente NOMEROBOT e NOMEFILE.", code=2)

    nomerobot = sys.argv[1]
    nomefile = sys.argv[2]

    ensure_project_layout()

    mapping = parse_robots_py(Path("robots.py"))
    var, hub = choose_robot(mapping, nomerobot)

    info(f"HUB: [green]{hub}[/]   ROBOT: [cyan]{var}[/]")

    # crea/scrive robot_local.py (se non esiste, lo crea)
    write_robot_local(Path("robot_local.py"), var)
    # ok(f"Aggiornato robot_local.py con 'from robots import {var} as robot'")

    # info(f"Eseguo: pybricksdev run ble {nomefile} --name {hub}")
    rc = run_pybricksdev(Path(nomefile), hub)

    if rc == 0:
        ok("programma terminato.")
    else:
        die(f"pybricksdev terminato con exit code {rc}.", code=rc)


if __name__ == "__main__":
    main()