"""Сравнение пакетов между серверами."""
import flet as ft

from app.core import servers as servers_core
from app.core.diff import diff_servers
from app.core.ssh import SSHClient
from app.ui.components import snack


class DiffPage(ft.Column):
    def __init__(self, page: ft.Page, go):
        super().__init__(expand=True, scroll=ft.ScrollMode.AUTO, spacing=12)
        self._page = page
        servers = servers_core.list_servers()
        opts = [ft.dropdown.Option(str(s.id), s.name) for s in servers]

        self.dd_a = ft.Dropdown(label="Сервер A", options=opts, width=250)
        self.dd_b = ft.Dropdown(label="Сервер B", options=opts, width=250)
        self.user_only = ft.Checkbox(label="только пользовательские пакеты", value=True)
        self.result = ft.Column(spacing=8)

        self.controls = [
            ft.Text("Сравнение серверов", size=28, weight=ft.FontWeight.BOLD),
            ft.Row([
                self.dd_a, self.dd_b, self.user_only,
                ft.FilledButton("Сравнить", icon=ft.Icons.COMPARE_ARROWS,
                                on_click=self._compare),
            ]),
            self.result,
        ]

    def _compare(self, e):
        if not self.dd_a.value or not self.dd_b.value or self.dd_a.value == self.dd_b.value:
            snack(self._page, "Выберите два разных сервера", error=True)
            return
        self.result.controls = [ft.ProgressBar()]
        self._page.update()

        async def _do():
            a = servers_core.get_server(int(self.dd_a.value))
            b = servers_core.get_server(int(self.dd_b.value))
            async with SSHClient(a) as ca, SSHClient(b) as cb:
                diff = await diff_servers(ca, cb, self.user_only.value)

            self.result.controls = [
                ft.Row([
                    self._section(f"Только на {a.name} ({len(diff.only_a)})",
                                  [f"{p.name} {p.version}" for p in diff.only_a],
                                  ft.Colors.BLUE_300),
                    self._section(f"Только на {b.name} ({len(diff.only_b)})",
                                  [f"{p.name} {p.version}" for p in diff.only_b],
                                  ft.Colors.GREEN_300),
                ], vertical_alignment=ft.CrossAxisAlignment.START),
                ft.Text(f"Различаются версии ({len(diff.version_mismatch)})",
                        weight=ft.FontWeight.BOLD, size=16),
                ft.DataTable(columns=[
                    ft.DataColumn(ft.Text("Пакет")),
                    ft.DataColumn(ft.Text(a.name)),
                    ft.DataColumn(ft.Text(b.name)),
                ], rows=[
                    ft.DataRow(cells=[
                        ft.DataCell(ft.Text(m.name)),
                        ft.DataCell(ft.Text(m.version_a, size=12)),
                        ft.DataCell(ft.Text(m.version_b, size=12,
                                            color=ft.Colors.ORANGE_300)),
                    ]) for m in diff.version_mismatch[:100]
                ]) if diff.version_mismatch else ft.Text("версии совпадают",
                                                         color=ft.Colors.GREY_500),
            ]
            self._page.update()
        self._page.run_task(_do)

    def _section(self, title, items, color):
        return ft.Container(expand=True, content=ft.Column([
            ft.Text(title, weight=ft.FontWeight.BOLD, color=color),
            ft.Container(
                height=300, border=ft.Border.all(1, ft.Colors.GREY_800),
                border_radius=8, padding=8,
                content=ft.Column([
                    ft.Text(i, size=11, font_family="Consolas") for i in items
                ] or [ft.Text("—", color=ft.Colors.GREY_600)],
                    scroll=ft.ScrollMode.AUTO, spacing=1),
            ),
        ]))