"""Плейбуки: список, редактор, запуск."""
import flet as ft

from app.core import playbooks as pb
from app.core import servers as servers_core
from app.core.ssh import SSHClient
from app.core.tasks import tasks
from app.ui.components import append_log, log_view, snack


class PlaybooksPage(ft.Column):
    def __init__(self, page: ft.Page, go):
        super().__init__(expand=True, spacing=12)
        self._page = page
        self.go = go

        self.list_col = ft.Column(spacing=6, scroll=ft.ScrollMode.AUTO)
        self.editor = ft.TextField(multiline=True, min_lines=18, max_lines=18,
                                   text_size=12,
                                   text_style=ft.TextStyle(font_family="Consolas"),
                                   expand=True)
        self.editor_name = ft.Text("", weight=ft.FontWeight.BOLD)
        self.log = log_view()
        self.log_container = ft.Container(
            height=180, border=ft.Border.all(1, ft.Colors.GREY_800),
            border_radius=8, padding=8, content=self.log, visible=False)

        self.controls = [
            ft.Text("Плейбуки", size=28, weight=ft.FontWeight.BOLD),
            ft.Row([
                ft.Container(width=300, content=ft.Column([
                    ft.FilledButton("Новый плейбук", icon=ft.Icons.ADD,
                                    on_click=self._new),
                    ft.Divider(),
                    self.list_col,
                ])),
                ft.VerticalDivider(width=1),
                ft.Container(expand=True, content=ft.Column([
                    ft.Row([
                        self.editor_name,
                        ft.Container(expand=True),
                        ft.OutlinedButton("Сохранить", icon=ft.Icons.SAVE,
                                          on_click=self._save),
                        ft.FilledButton("Запустить", icon=ft.Icons.PLAY_ARROW,
                                        on_click=self._run_dialog),
                    ]),
                    self.editor,
                    self.log_container,
                ], expand=True)),
            ], expand=True),
        ]
        self._current = None
        self._reload_list()

    def _reload_list(self):
        self.list_col.controls = [
            ft.ListTile(
                title=ft.Text(name, size=13),
                subtitle=ft.Text("встроенный" if name in pb.BUILTIN else "пользовательский",
                                 size=10),
                dense=True,
                on_click=lambda e, n=name: self._open(n),
            ) for name in pb.list_playbooks()
        ]
        self._page.update()

    def _open(self, name):
        import yaml
        self._current = name
        data = pb.load(name)
        self.editor.value = pb.BUILTIN.get(name) or (
            pb.PLAYBOOKS_DIR / f"{name}.yml").read_text(encoding="utf-8")
        self.editor_name.value = name
        self._page.update()

    def _new(self, e):
        name_tf = ft.TextField(label="Имя", autofocus=True)
        def create(e):
            self._current = name_tf.value
            self.editor_name.value = name_tf.value
            self.editor.value = 'name: "Новый плейбук"\nsteps:\n  - name: Проверка\n    shell: "uptime"\n'
            self._page.pop_dialog()
        dlg = ft.AlertDialog(modal=True, title=ft.Text("Имя плейбука"), content=name_tf,
                             actions=[ft.TextButton("Отмена", on_click=lambda e: self._close(dlg)),
                                      ft.FilledButton("Создать", on_click=create)])
        self._page.show_dialog(dlg)

    def _save(self, e):
        if not self._current or self._current in pb.BUILTIN:
            snack(self._page, "Встроенный плейбук нельзя перезаписать — создайте копию",
                  error=True)
            return
        try:
            pb.save(self._current, self.editor.value)
            snack(self._page, "Сохранено")
            self._reload_list()
        except Exception as ex:
            snack(self._page, f"Ошибка YAML: {ex}", error=True)

    def _run_dialog(self, e):
        if not self._current:
            return
        servers = servers_core.list_servers()
        checks = {s.id: ft.Checkbox(label=s.name, value=False) for s in servers}
        def run(e):
            selected = [s for s in servers if checks[s.id].value]
            if not selected:
                snack(self._page, "Выберите сервер", error=True)
                return
            self._page.pop_dialog()
            self._run_on(selected)
        dlg = ft.AlertDialog(
            modal=True, title=ft.Text(f"Запустить «{self._current}»"),
            content=ft.Column(list(checks.values()), tight=True),
            actions=[ft.TextButton("Отмена", on_click=lambda e: self._close(dlg)),
                     ft.FilledButton("Запустить", on_click=run)],
        )
        self._page.show_dialog(dlg)

    def _run_on(self, servers):
        self.log_container.visible = True
        data = pb.load(self._current)
        for srv in servers:
            async def job(log, srv=srv):
                async with SSHClient(srv) as c:
                    await pb.run_playbook(c, srv, data, log)
            tasks.start("playbook", f"плейбук {self._current}", srv.id, job,
                        on_log=lambda l: (append_log(self.log, l), self._page.update()))

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