"""Welcome / splash screen."""

import threading
import time
import tkinter as tk
from tkinter import ttk, messagebox, filedialog
from knoe import screen as ui


class WelcomeScreenMixin:
    """Welcome / splash screen."""

    def _render_welcome_page(self):
        # Letterhead at top right
        content_width = self.bg_canvas.winfo_width() or 975  # 1300 * 0.75 approx
        right_margin = content_width - 48

        ui.canvas_text(
            self,
            right_margin,
            40,
            "Prole",
            fill="#6e6e73",
            font=("SF Pro Text", 32, "bold"),
            anchor="ne",
        )
        ui.canvas_text(
            self,
            right_margin,
            85,
            "Infrastructure Automated.",
            fill="#6e6e73",
            font=("SF Pro Text", 18),
            anchor="ne",
        )

        # Welcome title
        self._render_title("Welcome", y=150)

        welcome_text = (
            "This installer will guide you through the process of setting up the Prole Database and its supporting "
            "infrastructure. We have designed this process to be as automated as possible, ensuring that your "
            "deployment is secure, efficient, and tailored to your specific network environment.\n\n"
            "What to expect:\n"
            "• Network Environment Discovery: We'll scan for existing services like Active Directory and DNS.\n"
            "• System Configuration: Setting up local paths and environment variables.\n"
            "• Dependency Management: Ensuring all required tools (Docker, k3d, etc.) are ready.\n"
            "• Database Initialization: Configuring passwords, Kerberos authentication, and deploying the database cluster.\n\n"
            "We are excited to have you join our community and start building with us. "
            "Welcome to the neighborhood! Let's get started by preparing your system for the Prole experience."
        )

        ui.canvas_text(
            self,
            48,
            220,
            welcome_text,
            fill="black",
            font=("SF Pro Text", 13),
            width=750,
        )

        # Ensure footer is updated (Next button visible)
        self.update_footer()

    def _start_welcome_dependency_scan(self):
        self.splash_scan_running = True
        self.splash_scan_done_at = None
        self.splash_scan_started_at = time.time()

        deps = list(self.dependencies)
        total = len(deps)
        results = {}

        def set_status(text: str):
            try:
                if self._splash_status_item is not None:
                    # Replace existing text to avoid creating many items
                    self.bg_canvas.itemconfig(self._splash_status_item, text=text)
            except Exception:
                pass

        def worker():
            missing_names = []
            for idx, dep in enumerate(deps, start=1):
                try:
                    ok, location, version = self.get_dep_info(dep)
                except Exception:
                    ok, location, version = False, None, None
                results[dep["id"]] = (ok, location, version)
                # Update status text progressively
                if ok:
                    txt = f"[{idx}/{total}] {dep['name']}: Installed"
                else:
                    txt = f"[{idx}/{total}] {dep['name']}: Not installed"
                    missing_names.append(dep["name"])
                self.safe_after(lambda s=txt: set_status(s))
                # tiny sleep to keep UI responsive without being too fast
                try:
                    time.sleep(0.02)
                except Exception:
                    pass

            # Final message
            final_msg = (
                "All dependencies installed."
                if not missing_names
                else ("Preparing to install ... " + ", ".join(missing_names))
            )

            def on_done():
                set_status(final_msg)
                self.splash_scan_running = False
                self.splash_scan_done_at = time.time()
                # Re-evaluate footer to potentially show Next
                self.update_footer()
                # Important: schedule a follow-up refresh slightly after the debounce window
                # so the Next button becomes visible without requiring further UI events.
                self.safe_after(self.update_footer, delay=600)

            self.safe_after(on_done)

        t = threading.Thread(target=worker, daemon=True)
        t.start()
        # Failsafe refresh slightly after the 8s gating window in case no UI events fire.
        self.safe_after(self.update_footer, delay=9000)

    def _create_page_welcome(self):
        f = self._page_container()
        ttk.Label(f, text="Welcome to Prole", style="Title.TLabel").pack(
            anchor="w", padx=24, pady=(24, 6)
        )
        msg = "Thanks for joining Prole. We will prepare your system and install the software needed to build and run Prole."
        ttk.Label(
            f, text=msg, style="Body.TLabel", wraplength=800, justify="left"
        ).pack(anchor="w", padx=24)
        # self._register_page('welcome', f)