"""
Connection and discovery dialogs for live Sedona devices.

ConnectDialog — manual host/port/user/password entry (Device > Connect).
DiscoverDialog — DASP broadcast discovery with device list; selecting a
device opens a credentials prompt, then connects (Device > Discover).
"""

import configparser
import threading
import tkinter as tk
from tkinter import ttk

import app_state


# ────────────────────────────────────────────────────────────────────
# ConnectDialog  (Device > Connect…)
# ────────────────────────────────────────────────────────────────────

class ConnectDialog:
    """Modal dialog for entering device connection parameters."""

    def __init__(self, parent, on_connect_callback):
        self._callback = on_connect_callback
        self._thread = None
        self._cancelled = False

        self._dlg = tk.Toplevel(parent)
        self._dlg.title("Connect to Device")
        self._dlg.resizable(False, False)
        self._dlg.transient(parent)
        self._dlg.grab_set()

        host, port, user = _load_last_connection()

        frame = ttk.Frame(self._dlg, padding=16)
        frame.pack(fill=tk.BOTH, expand=True)

        row = 0
        ttk.Label(frame, text="Host:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._host_var = tk.StringVar(value=host)
        self._host_entry = ttk.Entry(frame, textvariable=self._host_var, width=28)
        self._host_entry.grid(row=row, column=1, columnspan=2, sticky="ew", pady=4)

        row += 1
        ttk.Label(frame, text="Port:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._port_var = tk.StringVar(value=port)
        ttk.Entry(frame, textvariable=self._port_var, width=8).grid(
            row=row, column=1, sticky="w", pady=4)

        row += 1
        ttk.Label(frame, text="Username:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._user_var = tk.StringVar(value=user)
        ttk.Entry(frame, textvariable=self._user_var, width=28).grid(
            row=row, column=1, columnspan=2, sticky="ew", pady=4)

        row += 1
        ttk.Label(frame, text="Password:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._pass_var = tk.StringVar()
        ttk.Entry(frame, textvariable=self._pass_var, width=28, show="*").grid(
            row=row, column=1, columnspan=2, sticky="ew", pady=4)

        row += 1
        self._status_label = ttk.Label(frame, text="", foreground="#666666")
        self._status_label.grid(row=row, column=0, columnspan=3, sticky="w", pady=(8, 4))

        row += 1
        btn_frame = ttk.Frame(frame)
        btn_frame.grid(row=row, column=0, columnspan=3, sticky="e", pady=(8, 0))

        self._btn_cancel = ttk.Button(btn_frame, text="Cancel", command=self._do_cancel)
        self._btn_cancel.pack(side=tk.RIGHT)

        self._btn_connect = ttk.Button(btn_frame, text="Connect", command=self._do_connect)
        self._btn_connect.pack(side=tk.RIGHT, padx=(0, 8))

        self._host_entry.focus_set()
        self._dlg.bind("<Return>", lambda e: self._do_connect())
        self._dlg.bind("<Escape>", lambda e: self._do_cancel())

        self._dlg.update_idletasks()
        x = parent.winfo_x() + (parent.winfo_width() - self._dlg.winfo_width()) // 2
        y = parent.winfo_y() + (parent.winfo_height() - self._dlg.winfo_height()) // 2
        self._dlg.geometry(f"+{x}+{y}")

    def _do_connect(self):
        host = self._host_var.get().strip()
        port = self._port_var.get().strip()
        user = self._user_var.get().strip()
        password = self._pass_var.get()

        if not host:
            self._status_label.config(text="Host is required", foreground="#c00000")
            return
        if not user:
            self._status_label.config(text="Username is required", foreground="#c00000")
            return
        if not password:
            self._status_label.config(text="Password is required", foreground="#c00000")
            return

        try:
            port_int = int(port)
        except ValueError:
            self._status_label.config(text="Invalid port number", foreground="#c00000")
            return

        self._btn_connect.config(state="disabled")
        self._status_label.config(text="Connecting...", foreground="#666666")

        self._cancelled = False
        self._thread = threading.Thread(
            target=self._connect_worker,
            args=(host, port_int, user, password),
            daemon=True
        )
        self._thread.start()
        self._poll_connect()

    def _connect_worker(self, host, port, user, password):
        try:
            result = self._callback(host, port, user, password)
            if self._cancelled:
                return
            self._result = ("ok", result, host, port, user)
        except Exception as e:
            if self._cancelled:
                return
            self._result = ("error", str(e), host, port, user)

    def _poll_connect(self):
        if self._cancelled:
            return
        if self._thread is not None and self._thread.is_alive():
            self._dlg.after(100, self._poll_connect)
            return

        status, *rest = self._result
        if status == "ok":
            _, host, port, user = rest
            _save_last_connection(host, str(port), user)
            self._dlg.destroy()
        else:
            msg = rest[0]
            self._status_label.config(text=f"Error: {msg}", foreground="#c00000")
            self._btn_connect.config(state="normal")

    def _do_cancel(self):
        self._cancelled = True
        if self._thread is not None and self._thread.is_alive():
            import app_state as _as
            def _cleanup():
                self._thread.join(timeout=5)
                if _as.device_session is not None and _as.live_mode:
                    try:
                        _as.device_session.disconnect()
                    except Exception:
                        pass
                    _as.live_mode = False
                    _as.device_session = None
                    _as.connection_status = "offline"
            threading.Thread(target=_cleanup, daemon=True).start()
        self._dlg.destroy()


# ────────────────────────────────────────────────────────────────────
# DiscoverDialog  (Device > Discover…)
# ────────────────────────────────────────────────────────────────────

class DiscoverDialog:
    """Modal dialog that broadcasts DASP DISCOVER, lists responding
    devices, and lets the user pick one to connect to."""

    def __init__(self, parent, on_connect_callback):
        self._parent = parent
        self._callback = on_connect_callback
        self._discover_thread = None

        self._dlg = tk.Toplevel(parent)
        self._dlg.title("Discover Devices")
        self._dlg.resizable(False, False)
        self._dlg.transient(parent)
        self._dlg.grab_set()

        frame = ttk.Frame(self._dlg, padding=16)
        frame.pack(fill=tk.BOTH, expand=True)

        # ── Header row: label + wait + discover button ─────────────
        row = 0
        hdr = ttk.Frame(frame)
        hdr.grid(row=row, column=0, sticky="ew", pady=(0, 8))

        ttk.Label(hdr, text="Discovered Devices:").pack(side=tk.LEFT)

        self._btn_discover = ttk.Button(
            hdr, text="Discover", command=self._do_discover, width=10)
        self._btn_discover.pack(side=tk.RIGHT)

        self._wait_var = tk.StringVar(value="10")
        ttk.Entry(hdr, textvariable=self._wait_var, width=4, justify="center").pack(
            side=tk.RIGHT, padx=(0, 4))
        ttk.Label(hdr, text="Wait (s):").pack(side=tk.RIGHT, padx=(8, 2))

        _, port, _ = _load_last_connection()
        self._port_var = tk.StringVar(value=port)
        ttk.Entry(hdr, textvariable=self._port_var, width=6, justify="center").pack(
            side=tk.RIGHT, padx=(0, 4))
        ttk.Label(hdr, text="Port:").pack(side=tk.RIGHT, padx=(8, 2))

        # ── Device list ────────────────────────────────────────────
        row += 1
        list_frame = ttk.Frame(frame)
        list_frame.grid(row=row, column=0, sticky="nsew", pady=(0, 4))
        frame.rowconfigure(row, weight=1)

        columns = ("ip", "platform")
        self._dev_tree = ttk.Treeview(
            list_frame, columns=columns, show="headings", height=6, selectmode="browse")
        self._dev_tree.heading("ip", text="IP Address")
        self._dev_tree.heading("platform", text="Platform ID")
        self._dev_tree.column("ip", width=150, minwidth=100)
        self._dev_tree.column("platform", width=220, minwidth=120)
        self._dev_tree.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)

        scrollbar = ttk.Scrollbar(list_frame, orient="vertical", command=self._dev_tree.yview)
        scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
        self._dev_tree.configure(yscrollcommand=scrollbar.set)

        self._dev_tree.bind("<Double-1>", lambda e: self._do_connect_selected())

        # ── Status + buttons ───────────────────────────────────────
        row += 1
        self._status_label = ttk.Label(frame, text="", foreground="#666666")
        self._status_label.grid(row=row, column=0, sticky="w", pady=(8, 4))

        row += 1
        btn_frame = ttk.Frame(frame)
        btn_frame.grid(row=row, column=0, sticky="e", pady=(8, 0))

        ttk.Button(btn_frame, text="Cancel", command=self._dlg.destroy).pack(side=tk.RIGHT)
        self._btn_connect = ttk.Button(
            btn_frame, text="Connect", command=self._do_connect_selected)
        self._btn_connect.pack(side=tk.RIGHT, padx=(0, 8))

        self._dlg.bind("<Escape>", lambda e: self._dlg.destroy())

        self._dlg.update_idletasks()
        x = parent.winfo_x() + (parent.winfo_width() - self._dlg.winfo_width()) // 2
        y = parent.winfo_y() + (parent.winfo_height() - self._dlg.winfo_height()) // 2
        self._dlg.geometry(f"+{x}+{y}")

    # ── Discovery ──────────────────────────────────────────────────

    def _do_discover(self):
        try:
            port_int = int(self._port_var.get().strip())
        except ValueError:
            port_int = 1876

        try:
            wait_time = max(1, min(60, int(self._wait_var.get().strip())))
        except ValueError:
            wait_time = 10

        self._btn_discover.config(state="disabled")
        self._status_label.config(text="Discovering devices...", foreground="#666666")

        for item in self._dev_tree.get_children():
            self._dev_tree.delete(item)

        self._discover_thread = threading.Thread(
            target=self._discover_worker, args=(port_int, wait_time), daemon=True)
        self._discover_thread.start()
        self._poll_discover()

    def _discover_worker(self, port, wait_time):
        from dasp import DaspSocket
        sock = None
        try:
            sock = DaspSocket()
            devices = sock.discover(port=port, wait_time=wait_time)
            self._discover_result = ("ok", devices)
        except Exception as e:
            self._discover_result = ("error", str(e))
        finally:
            if sock is not None:
                try:
                    sock.close()
                except Exception:
                    pass

    def _poll_discover(self):
        if self._discover_thread is not None and self._discover_thread.is_alive():
            self._dlg.after(100, self._poll_discover)
            return

        status, data = self._discover_result
        self._btn_discover.config(state="normal")

        if status == "ok":
            if data:
                for ip, platform_id in data:
                    self._dev_tree.insert("", tk.END, values=(ip, platform_id))
                self._status_label.config(
                    text=f"Found {len(data)} device(s)", foreground="#006600")
            else:
                self._status_label.config(text="No devices found", foreground="#666666")
        else:
            self._status_label.config(
                text=f"Discovery error: {data}", foreground="#c00000")

    # ── Connect selected device ────────────────────────────────────

    def _do_connect_selected(self):
        sel = self._dev_tree.selection()
        if not sel:
            self._status_label.config(text="Select a device first", foreground="#c00000")
            return
        values = self._dev_tree.item(sel[0], "values")
        host = values[0]
        port = self._port_var.get().strip()
        self._dlg.destroy()
        _CredentialsDialog(self._parent, self._callback, host, port)


# ────────────────────────────────────────────────────────────────────
# _CredentialsDialog  (username / password prompt after discovery)
# ────────────────────────────────────────────────────────────────────

class _CredentialsDialog:
    """Small modal that asks for username and password, then connects."""

    def __init__(self, parent, on_connect_callback, host, port):
        self._callback = on_connect_callback
        self._host = host
        self._port = port
        self._thread = None
        self._cancelled = False

        _, _, last_user = _load_last_connection()

        self._dlg = tk.Toplevel(parent)
        self._dlg.title(f"Connect to {host}")
        self._dlg.resizable(False, False)
        self._dlg.transient(parent)
        self._dlg.grab_set()

        frame = ttk.Frame(self._dlg, padding=16)
        frame.pack(fill=tk.BOTH, expand=True)

        row = 0
        ttk.Label(frame, text="Host:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        ttk.Label(frame, text=f"{host}:{port}").grid(row=row, column=1, sticky="w", pady=4)

        row += 1
        ttk.Label(frame, text="Username:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._user_var = tk.StringVar(value=last_user)
        user_entry = ttk.Entry(frame, textvariable=self._user_var, width=24)
        user_entry.grid(row=row, column=1, sticky="ew", pady=4)

        row += 1
        ttk.Label(frame, text="Password:").grid(row=row, column=0, sticky="e", padx=(0, 8), pady=4)
        self._pass_var = tk.StringVar()
        ttk.Entry(frame, textvariable=self._pass_var, width=24, show="*").grid(
            row=row, column=1, sticky="ew", pady=4)

        row += 1
        self._status_label = ttk.Label(frame, text="", foreground="#666666")
        self._status_label.grid(row=row, column=0, columnspan=2, sticky="w", pady=(8, 4))

        row += 1
        btn_frame = ttk.Frame(frame)
        btn_frame.grid(row=row, column=0, columnspan=2, sticky="e", pady=(8, 0))

        ttk.Button(btn_frame, text="Cancel", command=self._do_cancel).pack(side=tk.RIGHT)
        self._btn_connect = ttk.Button(btn_frame, text="Connect", command=self._do_connect)
        self._btn_connect.pack(side=tk.RIGHT, padx=(0, 8))

        user_entry.focus_set()
        self._dlg.bind("<Return>", lambda e: self._do_connect())
        self._dlg.bind("<Escape>", lambda e: self._do_cancel())

        self._dlg.update_idletasks()
        x = parent.winfo_x() + (parent.winfo_width() - self._dlg.winfo_width()) // 2
        y = parent.winfo_y() + (parent.winfo_height() - self._dlg.winfo_height()) // 2
        self._dlg.geometry(f"+{x}+{y}")

    def _do_connect(self):
        user = self._user_var.get().strip()
        password = self._pass_var.get()

        if not user:
            self._status_label.config(text="Username is required", foreground="#c00000")
            return
        if not password:
            self._status_label.config(text="Password is required", foreground="#c00000")
            return

        try:
            port_int = int(self._port)
        except ValueError:
            self._status_label.config(text="Invalid port", foreground="#c00000")
            return

        self._btn_connect.config(state="disabled")
        self._status_label.config(text="Connecting...", foreground="#666666")

        self._cancelled = False
        self._thread = threading.Thread(
            target=self._connect_worker,
            args=(self._host, port_int, user, password),
            daemon=True
        )
        self._thread.start()
        self._poll_connect()

    def _connect_worker(self, host, port, user, password):
        try:
            result = self._callback(host, port, user, password)
            if self._cancelled:
                return
            self._result = ("ok", result, host, port, user)
        except Exception as e:
            if self._cancelled:
                return
            self._result = ("error", str(e), host, port, user)

    def _poll_connect(self):
        if self._cancelled:
            return
        if self._thread is not None and self._thread.is_alive():
            self._dlg.after(100, self._poll_connect)
            return

        status, *rest = self._result
        if status == "ok":
            _, host, port, user = rest
            _save_last_connection(host, str(port), user)
            self._dlg.destroy()
        else:
            msg = rest[0]
            self._status_label.config(text=f"Error: {msg}", foreground="#c00000")
            self._btn_connect.config(state="normal")

    def _do_cancel(self):
        self._cancelled = True
        if self._thread is not None and self._thread.is_alive():
            import app_state as _as
            def _cleanup():
                self._thread.join(timeout=5)
                if _as.device_session is not None and _as.live_mode:
                    try:
                        _as.device_session.disconnect()
                    except Exception:
                        pass
                    _as.live_mode = False
                    _as.device_session = None
                    _as.connection_status = "offline"
            threading.Thread(target=_cleanup, daemon=True).start()
        self._dlg.destroy()


# ────────────────────────────────────────────────────────────────────
# Persistence helpers
# ────────────────────────────────────────────────────────────────────

def _load_last_connection():
    """Reads last connection params from editor.properties."""
    config = configparser.ConfigParser()
    host = "192.168.1.100"
    port = "1876"
    user = "admin"
    try:
        if app_state.PROPERTIES_FILE:
            config.read(app_state.PROPERTIES_FILE)
            host = config.get("Device", "host", fallback=host)
            port = config.get("Device", "port", fallback=port)
            user = config.get("Device", "user", fallback=user)
    except Exception:
        pass
    return host, port, user


def _save_last_connection(host, port, user):
    """Saves connection params to editor.properties."""
    config = configparser.ConfigParser()
    try:
        config.read(app_state.PROPERTIES_FILE)
        if "Device" not in config:
            config["Device"] = {}
        config["Device"]["host"] = host
        config["Device"]["port"] = port
        config["Device"]["user"] = user
        with open(app_state.PROPERTIES_FILE, "w") as f:
            config.write(f)
    except Exception:
        pass