"""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 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):
        super().__init__()
        self.title("Protector GUI")
        self.geometry("700x500")

        self.cfg = load_cfg()

        # Config frame
        cf = tk.LabelFrame(self, text="Config")
        cf.pack(fill="x", padx=8, pady=6)

        tk.Label(cf, text="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="conn_threshold:").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="test_prefix:").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="rule_ip_limit:").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="scan_interval (s):").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="Save Config", command=self.save_config).grid(row=3, column=1, sticky="w", pady=6)

        # Protector list frame
        lf = tk.LabelFrame(self, text="Protector List")
        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="target_ip:").pack(anchor="w")
        self.ip_entry = tk.Entry(right)
        self.ip_entry.pack(fill="x")
        tk.Label(right, text="src_port:").pack(anchor="w")
        self.port_entry = tk.Entry(right)
        self.port_entry.pack(fill="x")
        tk.Label(right, text="threshold (optional):").pack(anchor="w")
        self.entry_threshold = tk.Entry(right)
        self.entry_threshold.pack(fill="x")

        tk.Button(right, text="Add", command=self.add_entry).pack(fill="x", pady=4)
        tk.Button(right, text="Update", command=self.update_entry).pack(fill="x", pady=4)
        tk.Button(right, text="Remove", command=self.remove_entry).pack(fill="x", pady=4)

        self.load_values()

    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')})")

    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 run_gui():
    app = ProtectorGUI()
    app.mainloop()


if __name__ == "__main__":
    run_gui()