"""Серверы: список, добавление, редактирование, удаление."""
import flet as ft

from app.core import servers as servers_core
from app.core.ssh import check_server
from app.ui.components import confirm_dialog, snack


class ServersPage(ft.Column):
    def __init__(self, page: ft.Page, go):
        super().__init__(expand=True, scroll=ft.ScrollMode.AUTO)
        self._page = page
        self.go = go
        self.table = ft.DataTable(
            columns=[
                ft.DataColumn(ft.Text("Имя")),
                ft.DataColumn(ft.Text("Хост")),
                ft.DataColumn(ft.Text("Пользователь")),
                ft.DataColumn(ft.Text("Теги")),
                ft.DataColumn(ft.Text("Статус")),
                ft.DataColumn(ft.Text("Действия")),
            ],
            rows=[],
        )
        self.controls = [
            ft.Row([
                ft.Text("Серверы", size=28, weight=ft.FontWeight.BOLD),
                ft.FilledButton("Добавить сервер", icon=ft.Icons.ADD,
                                on_click=self._add_dialog),
            ], alignment=ft.MainAxisAlignment.SPACE_BETWEEN),
            ft.Card(content=ft.Container(padding=10, content=self.table)),
        ]
        self.reload()

    def reload(self):
        self.table.rows = []
        for s in servers_core.list_servers():
            self.table.rows.append(ft.DataRow(cells=[
                ft.DataCell(ft.Text(s.name, weight=ft.FontWeight.BOLD)),
                ft.DataCell(ft.Text(f"{s.host}:{s.port}")),
                ft.DataCell(ft.Text(s.username)),
                ft.DataCell(ft.Text(s.tags or "—")),
                ft.DataCell(ft.Text("…", key=f"status_{s.id}")),
                ft.DataCell(ft.Row([
                    ft.IconButton(ft.Icons.OPEN_IN_NEW, tooltip="Открыть",
                                  on_click=lambda e, sid=s.id: self.go("server_detail", sid)),
                    ft.IconButton(ft.Icons.EDIT, tooltip="Изменить",
                                  on_click=lambda e, s=s: self._edit_dialog(s)),
                    ft.IconButton(ft.Icons.DELETE, tooltip="Удалить",
                                  on_click=lambda e, s=s: self._delete(s)),
                ])),
            ]))
        self._page.update()
        for s in servers_core.list_servers():
            self._page.run_task(self._check, s)

    async def _check(self, s):
        info = await check_server(s)
        txt = "🟢 онлайн" if info.get("online") else "🔴 оффлайн"
        self._statuses = getattr(self, "_statuses", {})
        self._statuses[s.id] = txt
        for i, srv in enumerate(servers_core.list_servers()):
            if i < len(self.table.rows):
                self.table.rows[i].cells[4].content = ft.Text(
                    self._statuses.get(srv.id, "…"))
        self._page.update()

    # ---------- диалоги ----------

    def _form(self, s=None):
        return {
            "name": ft.TextField(label="Имя", value=s.name if s else "", width=300),
            "host": ft.TextField(label="Хост", value=s.host if s else "", width=300),
            "port": ft.TextField(label="Порт", value=str(s.port) if s else "22", width=100),
            "username": ft.TextField(label="Пользователь", value=s.username if s else "root", width=300),
            "auth_type": ft.Dropdown(
                label="Авторизация", width=300,
                value=s.auth_type if s else "password",
                options=[
                    ft.dropdown.Option("password", "Пароль"),
                    ft.dropdown.Option("key", "SSH-ключ"),
                ],
            ),
            "password": ft.TextField(label="Пароль / passphrase", password=True,
                                     value=s.password if s else "", width=300),
            "key_path": ft.TextField(label="Путь к ключу", value=s.key_path or "" if s else "",
                                     width=300),
            "sudo_password": ft.TextField(label="Sudo-пароль (если отличается)", password=True,
                                          value=s.sudo_password or "" if s else "", width=300),
            "tags": ft.TextField(label="Теги (через запятую)", value=s.tags if s else "", width=300),
        }

    def _add_dialog(self, e):
        self._open_form("Новый сервер", self._form(), None)

    def _edit_dialog(self, s):
        self._open_form(f"Изменить: {s.name}", self._form(s), s.id)

    def _open_form(self, title, f, server_id):
        def save(e):
            fields = dict(
                name=f["name"].value, host=f["host"].value,
                port=int(f["port"].value or 22), username=f["username"].value,
                auth_type=f["auth_type"].value,
                password=f["password"].value or None,
                key_path=f["key_path"].value or None,
                sudo_password=f["sudo_password"].value or None,
                tags=f["tags"].value,
            )
            if server_id:
                servers_core.update_server(server_id, **fields)
            else:
                servers_core.add_server(**fields)
            self._page.pop_dialog()
            self.reload()
            snack(self._page, "Сохранено")

        def test(e):
            async def _t():
                fields = dict(
                    id=0, name=f["name"].value or "test", host=f["host"].value,
                    port=int(f["port"].value or 22), username=f["username"].value,
                    auth_type=f["auth_type"].value,
                    password=f["password"].value or None,
                    key_path=f["key_path"].value or None,
                    sudo_password=f["sudo_password"].value or None,
                    tags="", color="blue", read_only=False,
                )
                from app.db.models import Server
                info = await check_server(Server(**fields))
                if info.get("online"):
                    snack(self._page, f"✅ {info['os']} | {info['uptime']}")
                else:
                    snack(self._page, f"❌ {info.get('error')}", error=True)
            self._page.run_task(_t)

        dlg = ft.AlertDialog(
            modal=True,
            title=ft.Text(title),
            content=ft.Column(list(f.values()), tight=True,
                              scroll=ft.ScrollMode.AUTO, height=480),
            actions=[
                ft.TextButton("Проверить подключение", on_click=test),
                ft.TextButton("Отмена", on_click=lambda e: self._close(dlg)),
                ft.FilledButton("Сохранить", on_click=save),
            ],
        )
        self._page.show_dialog(dlg)

    def _close(self, dlg):
        self._page.pop_dialog()

    def _delete(self, s):
        confirm_dialog(
            self._page, "Удалить сервер?",
            f"Сервер «{s.name}» ({s.host}) будет удалён из приложения. На самом сервере ничего не изменится.",
            lambda: (servers_core.delete_server(s.id), self.reload()),
        )