"""A simple tkinter GUI to edit config.json and manage protector list.

Features:
- Edit base_url, conn_threshold, scan_interval (saved to config.json)
- Manage protector_list entries (add/edit/remove) stored in protector_list.json
- On saving base_url, attempt login via auth_session.login() and store sess_key
"""
from __future__ import annotations

import json
import threading
import time
import tkinter as tk
from tkinter import messagebox
from pathlib import Path

from auth_session import load_config, get_base_url, login, set_sess_key
import protector_list

ROOT = Path(__file__).resolve().parent
CONFIG_PATH = ROOT / "config.json"


def load_cfg():
    return load_config()


def save_cfg(cfg: dict):
    with open(CONFIG_PATH, "w", encoding="utf-8") as f:
        json.dump(cfg, f, ensure_ascii=False, indent=2)


class ProtectorGUI(tk.Tk):
    def __init__(self, protector_runner=None):
        super().__init__()
        self.title("Protector GUI")
        self.geometry("700x710")

        self.cfg = load_cfg()
        # 配置区域
        cf = tk.LabelFrame(self, text="配置")
        cf.pack(fill="x", padx=8, pady=6)

        tk.Label(cf, text="设备地址 (base_url):").grid(row=0, column=0, sticky="w")
        self.base_entry = tk.Entry(cf, width=60)
        self.base_entry.grid(row=0, column=1, padx=4, pady=2)

        tk.Label(cf, text="连接阈值:").grid(row=1, column=0, sticky="w")
        self.th_entry = tk.Entry(cf, width=10)
        self.th_entry.grid(row=1, column=1, sticky="w", padx=4, pady=2)

        tk.Label(cf, text="测试前缀:").grid(row=1, column=2, sticky="w", padx=(12,0))
        self.test_prefix_entry = tk.Entry(cf, width=15)
        self.test_prefix_entry.grid(row=1, column=3, sticky="w", padx=4, pady=2)

        tk.Label(cf, text="规则 IP 上限:").grid(row=2, column=2, sticky="w", padx=(12,0))
        self.rule_limit_entry = tk.Entry(cf, width=15)
        self.rule_limit_entry.grid(row=2, column=3, sticky="w", padx=4, pady=2)

        tk.Label(cf, text="检测间隔 (秒):").grid(row=2, column=0, sticky="w")
        self.interval_entry = tk.Entry(cf, width=10)
        self.interval_entry.grid(row=2, column=1, sticky="w", padx=4, pady=2)

        tk.Button(cf, text="保存配置", command=self.save_config).grid(row=3, column=1, sticky="w", pady=6)

        # 监控目标列表
        lf = tk.LabelFrame(self, text="监控目标列表")
        lf.pack(fill="both", expand=True, padx=8, pady=6)

        self.listbox = tk.Listbox(lf)
        self.listbox.pack(side="left", fill="both", expand=True, padx=4, pady=4)
        self.listbox.bind("<<ListboxSelect>>", self.on_select)

        right = tk.Frame(lf)
        right.pack(side="right", fill="y", padx=4)

        tk.Label(right, text="目标 IP:").pack(anchor="w")
        self.ip_entry = tk.Entry(right)
        self.ip_entry.pack(fill="x")
        tk.Label(right, text="源端口:").pack(anchor="w")
        self.port_entry = tk.Entry(right)
        self.port_entry.pack(fill="x")
        tk.Label(right, text="阈值（可选）:").pack(anchor="w")
        self.entry_threshold = tk.Entry(right)
        self.entry_threshold.pack(fill="x")

        tk.Button(right, text="添加", command=self.add_entry).pack(fill="x", pady=4)
        tk.Button(right, text="更新", command=self.update_entry).pack(fill="x", pady=4)
        tk.Button(right, text="删除", command=self.remove_entry).pack(fill="x", pady=4)

        self.load_values()

        # 自动在后台尝试登录（启动后立即）
        def _auto_login():
            try:
                resp, sess_cookie = login()
                if sess_cookie:
                    set_sess_key(sess_cookie)
                    # 不弹出大量通知，只有在需要时可打开下面这一行
                    # messagebox.showinfo("登录", f"自动登录完成, 状态: {resp.status_code}")
            except Exception as e:
                # 登录失败不阻塞 GUI，记录到控制台/弹出一条错误提示
                try:
                    messagebox.showerror("自动登录失败", str(e))
                except Exception:
                    print("自动登录失败:", e)

        threading.Thread(target=_auto_login, daemon=True).start()

        # Protector runner instance (optional) for countdown and triggering runs
        self.protector_runner = protector_runner
        # 倒计时标签
        self.countdown_var = tk.StringVar(value="保护器：空闲")
        self.countdown_label = tk.Label(self, textvariable=self.countdown_var)
        self.countdown_label.pack(anchor="ne", padx=8, pady=4)

        # Pause/Resume button
        self.pause_btn = None
        if self.protector_runner is not None:
            self.pause_btn = tk.Button(self, text="暂停", command=self._toggle_pause)
            self.pause_btn.pack(anchor="ne", padx=8)

        # Blocked IPs frame (uses advanced_acl to query current Test_ prefixed rules)
        bf = tk.LabelFrame(self, text="已阻断的 IP（来自高级 ACL）")
        bf.pack(fill="both", expand=False, padx=8, pady=6)

        self.block_listbox = tk.Listbox(bf, height=8)
        self.block_listbox.pack(side="left", fill="both", expand=True, padx=4, pady=4)

        block_right = tk.Frame(bf)
        block_right.pack(side="right", fill="y", padx=4)

        tk.Button(block_right, text="刷新阻断列表", command=self.refresh_blocked_ips).pack(fill="x", pady=2)
        tk.Label(block_right, text="手动加入 IP：").pack(anchor="w", pady=(8,0))
        self.manual_ip_entry = tk.Entry(block_right)
        self.manual_ip_entry.pack(fill="x")
        tk.Button(block_right, text="加入阻断", command=self.manual_add_ip).pack(fill="x", pady=2)
        tk.Button(block_right, text="从阻断列表删除选中项", command=self.manual_remove_selected).pack(fill="x", pady=2)

        # Register on_run_complete callback only after GUI widgets exist
        if self.protector_runner is not None:
            def _on_protector_run_complete():
                # schedule a GUI-thread refresh; guard if widget removed
                try:
                    if hasattr(self, "block_listbox") and self.block_listbox is not None:
                        self.after(100, self.refresh_blocked_ips)
                except Exception:
                    pass

            try:
                self.protector_runner.on_run_complete = _on_protector_run_complete
            except Exception:
                # ignore if unable to set
                pass

        # start initial delayed run countdown (10 seconds) if runner provided
        if self.protector_runner is not None:
            self._initial_delay = 10
            self._countdown_seconds = self._initial_delay
            # schedule countdown update every 1 second via tkinter's after
            self.after(1000, self._update_countdown)


    def load_values(self):
        self.cfg = load_cfg()
        self.base_entry.delete(0, tk.END)
        self.base_entry.insert(0, self.cfg.get("base_url", ""))
        self.th_entry.delete(0, tk.END)
        self.th_entry.insert(0, str(self.cfg.get("conn_threshold", "")))
        # new fields
        self.test_prefix_entry.delete(0, tk.END)
        self.test_prefix_entry.insert(0, str(self.cfg.get("test_prefix", "Test_")))
        self.rule_limit_entry.delete(0, tk.END)
        self.rule_limit_entry.insert(0, str(self.cfg.get("rule_ip_limit", 1000)))
        self.interval_entry.delete(0, tk.END)
        self.interval_entry.insert(0, str(self.cfg.get("scan_interval", 60)))

        self.reload_listbox()

    def reload_listbox(self):
        self.listbox.delete(0, tk.END)
        items = protector_list.load_list()
        for i in items:
            self.listbox.insert(tk.END, f"{i['id']}: {i['target_ip']}:{i['src_port']} (th={i.get('threshold')})")
        # do NOT auto-refresh blocked IPs here (only refresh on explicit action or protector run)

    def refresh_blocked_ips(self):
        """Query advanced_acl.get_all_test_ips() and update the block_listbox."""
        # defensive: ensure listbox exists
        if not hasattr(self, "block_listbox") or self.block_listbox is None:
            # nothing to refresh
            return

        try:
            import advanced_acl
        except Exception as e:
            messagebox.showerror("错误", f"无法导入 advanced_acl: {e}")
            return

        try:
            # clear listbox
            try:
                self.block_listbox.delete(0, tk.END)
            except Exception:
                # if delete fails, just recreate a fresh listbox entry
                pass

            ips = advanced_acl.get_all_test_ips()
            # ips expected as list of dicts or simple ip strings
            if isinstance(ips, dict):
                # maybe returned as {"ips": [...]}
                ips_list = ips.get("ips") or ips.get("data") or []
            else:
                ips_list = ips or []

            for it in ips_list:
                if isinstance(it, dict):
                    ip = it.get("ip") or it.get("dst_addr") or str(it)
                    comment = it.get("comment") or it.get("rule") or ""
                    self.block_listbox.insert(tk.END, f"{ip}    {comment}")
                else:
                    self.block_listbox.insert(tk.END, str(it))
        except Exception as e:
            # show more helpful error including type
            messagebox.showerror("错误", f"获取阻断列表失败: {type(e).__name__}: {e}")

    def manual_add_ip(self):
        ip = self.manual_ip_entry.get().strip()
        if not ip:
            messagebox.showerror("错误", "请输入要阻断的 IP")
            return
        try:
            import advanced_acl
            res = advanced_acl.add_ip(ip)
            # best-effort feedback
            messagebox.showinfo("加入阻断", f"尝试加入 {ip}: {res}")
            self.refresh_blocked_ips()
        except Exception as e:
            messagebox.showerror("错误", f"加入阻断失败: {e}")

    def manual_remove_selected(self):
        sel = self.block_listbox.curselection()
        if not sel:
            messagebox.showerror("错误", "先选择要删除的项")
            return
        idx = sel[0]
        item = self.block_listbox.get(idx)
        # try to parse ip from the line (assume leading token)
        ip = item.split()[0]
        try:
            import advanced_acl
            res = advanced_acl.del_ip(ip)
            messagebox.showinfo("删除阻断", f"尝试删除 {ip}: {res}")
            self.refresh_blocked_ips()
        except Exception as e:
            messagebox.showerror("错误", f"删除阻断失败: {e}")

    def save_config(self):
        try:
            self.cfg["base_url"] = self.base_entry.get().strip()
            self.cfg["conn_threshold"] = int(self.th_entry.get().strip())
            # optional new fields
            self.cfg["test_prefix"] = str(self.test_prefix_entry.get().strip())
            self.cfg["rule_ip_limit"] = int(self.rule_limit_entry.get().strip())
            self.cfg["scan_interval"] = int(self.interval_entry.get().strip())
        except Exception as e:
            messagebox.showerror("错误", f"配置输入无效: {e}")
            return

        save_cfg(self.cfg)

        # try login on a background thread
        def _login():
            try:
                resp, sess_cookie = login()
                if sess_cookie:
                    set_sess_key(sess_cookie)
                messagebox.showinfo("登录", f"登录完成, 状态: {resp.status_code}")
            except Exception as e:
                messagebox.showerror("登录失败", str(e))

        threading.Thread(target=_login, daemon=True).start()

    def on_select(self, evt):
        sel = self.listbox.curselection()
        if not sel:
            return
        idx = sel[0]
        items = protector_list.load_list()
        if idx >= len(items):
            return
        item = items[idx]
        self.ip_entry.delete(0, tk.END)
        self.ip_entry.insert(0, item.get("target_ip", ""))
        self.port_entry.delete(0, tk.END)
        self.port_entry.insert(0, str(item.get("src_port", "")))
        self.entry_threshold.delete(0, tk.END)
        self.entry_threshold.insert(0, str(item.get("threshold", "")))

    def add_entry(self):
        ip = self.ip_entry.get().strip()
        port = self.port_entry.get().strip()
        th = self.entry_threshold.get().strip() or None
        if not ip or not port:
            messagebox.showerror("错误", "ip 与 port 为必填")
            return
        try:
            entry = protector_list.add_entry(ip, int(port), int(th) if th else None)
            self.reload_listbox()
            messagebox.showinfo("添加", f"已添加: {entry}")
        except Exception as e:
            messagebox.showerror("错误", str(e))

    def update_entry(self):
        sel = self.listbox.curselection()
        if not sel:
            messagebox.showerror("错误", "先选择一条")
            return
        idx = sel[0]
        items = protector_list.load_list()
        if idx >= len(items):
            return
        eid = items[idx]["id"]
        ip = self.ip_entry.get().strip()
        port = self.port_entry.get().strip()
        th = self.entry_threshold.get().strip() or None
        try:
            updated = protector_list.update_entry(eid, target_ip=ip, src_port=int(port), threshold=(int(th) if th else None))
            if updated is None:
                messagebox.showerror("错误", "更新失败")
            else:
                self.reload_listbox()
                messagebox.showinfo("更新", f"已更新: {updated}")
        except Exception as e:
            messagebox.showerror("错误", str(e))

    def remove_entry(self):
        sel = self.listbox.curselection()
        if not sel:
            messagebox.showerror("错误", "先选择一条")
            return
        idx = sel[0]
        items = protector_list.load_list()
        if idx >= len(items):
            return
        eid = items[idx]["id"]
        ok = protector_list.remove_entry(eid)
        if ok:
            self.reload_listbox()
            messagebox.showinfo("删除", "已删除")
        else:
            messagebox.showerror("错误", "删除失败")


    def _update_countdown(self):
        """Update countdown label every second and trigger protector run when it reaches zero."""
        try:
            if not self.protector_runner:
                return

            # Update label: compute seconds until next run based on protector_runner's schedule
            try:
                if self.protector_runner.is_paused():
                    self.countdown_var.set("保护器：已暂停")
                else:
                    next_ts = self.protector_runner.get_next_run_time()
                    if next_ts is None:
                        # fallback to internal counter
                        secs = max(0, int(self._countdown_seconds))
                    else:
                        secs = max(0, int(round(next_ts - time.time())))
                    self.countdown_var.set(f"下一次检测：{secs}s")
            except Exception:
                self.countdown_var.set("保护器：运行中")

            # if protector hasn't been started yet, use internal countdown
            try:
                started = getattr(self.protector_runner, "_started", False)
            except Exception:
                started = False

            if not started:
                # use internal countdown to start
                if self._countdown_seconds <= 0:
                    do_start = True
                else:
                    do_start = False
            else:
                # protector already started; rely on its internal schedule
                do_start = False

            if do_start:
                # If protector runner not started yet, start its loop first
                try:
                    if not getattr(self.protector_runner, "_started", False):
                        # start the background loop
                        self.protector_runner._started = True
                        threading.Thread(target=self.protector_runner.start, daemon=True).start()
                except Exception:
                    pass

                # ProtectorRunner.start() will perform an initial run, so do not
                # explicitly call run_once() here to avoid double execution.
                # reset internal countdown to interval after start
                try:
                    self._countdown_seconds = int(self.protector_runner.get_interval())
                except Exception:
                    self._countdown_seconds = self._initial_delay
                # update pause button text
                try:
                    if self.pause_btn:
                        self.pause_btn.config(text=("恢复" if self.protector_runner.is_paused() else "暂停"))
                except Exception:
                    pass
            else:
                # when protector not started, decrement the internal counter for display
                if not started:
                    self._countdown_seconds -= 1

        except Exception as e:
            # keep ticking even on error
            print("倒计时更新出错:", e)

        # schedule next tick
        try:
            self.after(1000, self._update_countdown)
        except Exception:
            pass

    def _toggle_pause(self):
        if not self.protector_runner:
            return
        try:
            if self.protector_runner.is_paused():
                self.protector_runner.resume()
                if self.pause_btn:
                    self.pause_btn.config(text="暂停")
            else:
                self.protector_runner.pause()
                if self.pause_btn:
                    self.pause_btn.config(text="恢复")
        except Exception as e:
            messagebox.showerror("错误", f"切换暂停/恢复失败: {e}")

def run_gui(protector_runner=None):
    app = ProtectorGUI(protector_runner=protector_runner)
    app.mainloop()


if __name__ == "__main__":
    run_gui()