#!/usr/bin/env python3
"""TUI wizard to configure contact details for the laendleimmo.at scraper."""

import json
import sys
from pathlib import Path

try:
    import questionary
    from questionary import Style
except ImportError:
    sys.exit("questionary is not installed. Run:  pip install questionary")

CONFIG_FILE = Path(__file__).parent / "contact_config.json"

STYLE = Style(
    [
        ("qmark", "fg:#00aabb bold"),
        ("question", "bold"),
        ("answer", "fg:#00aabb bold"),
        ("pointer", "fg:#00aabb bold"),
        ("selected", "fg:#00aabb"),
        ("separator", "fg:#6c6c6c"),
        ("instruction", "fg:#858585 italic"),
    ]
)

DEFAULT_MESSAGE = """\
Sehr geehrte Damen und Herren,

ich interessiere mich sehr für Ihre Immobilie und würde mich über einen \
Besichtigungstermin sehr freuen.

Bitte nehmen Sie Kontakt mit mir auf, damit wir einen Termin vereinbaren können.

Mit freundlichen Grüßen
{name}"""

DIVIDER = "─" * 52


def ask(fn, *args, **kwargs):
    """Wrapper that exits cleanly on Ctrl-C."""
    result = fn(*args, style=STYLE, **kwargs).ask()
    if result is None:
        print("\nAborted.")
        sys.exit(0)
    return result


def validate_email(v: str) -> bool | str:
    return True if "@" in v and "." in v.split("@")[-1] else "Enter a valid e-mail address"


def enter_multiline(prompt: str, default: str = "") -> str:
    print(f"\n  {prompt}")
    print(f"  (type your message; enter a blank line to finish)")
    if default:
        print(f"  Current value shown below — press Enter on blank line to keep it:\n")
        print("  " + default.replace("\n", "\n  "))
        print()

    lines: list[str] = []
    try:
        while True:
            line = input("  > ")
            if line == "" and lines and lines[-1] == "":
                lines.pop()
                break
            lines.append(line)
    except (KeyboardInterrupt, EOFError):
        print("\nAborted.")
        sys.exit(0)

    text = "\n".join(lines).strip()
    return text if text else default


def load_existing() -> dict:
    if CONFIG_FILE.exists():
        with open(CONFIG_FILE, encoding="utf-8") as f:
            return json.load(f)
    return {}


def show_summary(cfg: dict) -> None:
    print(f"\n  {DIVIDER}")
    print("  Saved configuration:")
    print(f"  {DIVIDER}")
    print(f"  Name    : {cfg.get('name', '')}")
    print(f"  E-mail  : {cfg.get('email', '')}")
    print(f"  Phone   : {cfg.get('phone') or '(not set)'}")
    msg_preview = cfg.get("message", "")[:60].replace("\n", " ")
    print(f"  Message : {msg_preview}…")
    login = cfg.get("login_email", "")
    print(f"  Login   : {login if login else '(not configured)'}")
    print(f"  {DIVIDER}")
    print(f"  Config  : {CONFIG_FILE}\n")


def main() -> None:
    print()
    print(f"  {DIVIDER}")
    print("    ländleimmo.at — Contact Configuration Wizard")
    print(f"  {DIVIDER}\n")

    existing = load_existing()

    if existing:
        edit = ask(
            questionary.confirm,
            "Existing config found. Edit it?",
            default=True,
        )
        if not edit:
            show_summary(existing)
            return

    # ── Personal details ────────────────────────────────────────────────── #
    print(f"\n  {DIVIDER}")
    print("  1 / 3  Personal details")
    print(f"  {DIVIDER}\n")

    name = ask(
        questionary.text,
        "Full name:",
        default=existing.get("name", ""),
    )
    email = ask(
        questionary.text,
        "E-mail address:",
        default=existing.get("email", ""),
        validate=validate_email,
    )
    phone = ask(
        questionary.text,
        "Phone number (optional — press Enter to skip):",
        default=existing.get("phone", ""),
    )

    # ── Message ─────────────────────────────────────────────────────────── #
    print(f"\n  {DIVIDER}")
    print("  2 / 3  Contact message")
    print(f"  {DIVIDER}")
    print("  Tip: use {name} as a placeholder for your name.")

    use_default_msg = ask(
        questionary.select,
        "Message template:",
        choices=[
            questionary.Choice("Use built-in German template", value="default"),
            questionary.Choice("Write / edit message now", value="custom"),
            *([questionary.Choice("Keep existing message", value="keep")] if existing.get("message") else []),
        ],
    )

    if use_default_msg == "default":
        message = DEFAULT_MESSAGE
    elif use_default_msg == "keep":
        message = existing["message"]
    else:
        message = enter_multiline(
            "Your contact message:",
            default=existing.get("message", DEFAULT_MESSAGE),
        )

    # ── Site login (optional) ────────────────────────────────────────────── #
    print(f"\n  {DIVIDER}")
    print("  3 / 3  Site login (optional)")
    print(f"  {DIVIDER}")
    print("  If you have an account on laendleimmo.at the scraper can log in")
    print("  first so personal data is pre-filled on the contact form.\n")

    use_login = ask(
        questionary.confirm,
        "Configure site login credentials?",
        default=bool(existing.get("login_email")),
    )

    login_email = ""
    login_password = ""
    if use_login:
        login_email = ask(
            questionary.text,
            "Site login e-mail:",
            default=existing.get("login_email", email),
        )
        login_password = ask(
            questionary.password,
            "Site login password:",
        )

    # ── Build and save ───────────────────────────────────────────────────── #
    cfg: dict = {
        "name": name,
        "email": email,
        "phone": phone,
        "message": message,
    }
    if use_login:
        cfg["login_email"] = login_email
        cfg["login_password"] = login_password

    CONFIG_FILE.parent.mkdir(parents=True, exist_ok=True)
    with open(CONFIG_FILE, "w", encoding="utf-8") as f:
        json.dump(cfg, f, indent=2, ensure_ascii=False)

    show_summary(cfg)
    print("  Configuration saved successfully.\n")


if __name__ == "__main__":
    main()