using System;
using System.IO;
using System.Text.Json;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Windows.System;
using EveryPublish.Client.Services;

namespace EveryPublish.Client.Pages;

public sealed partial class SettingsPage : Page
{
    private ClientContext _ctx = null!;

    public SettingsPage()
    {
        InitializeComponent();
    }

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        _ctx = (ClientContext)e.Parameter;
        DataDirText.Text = _ctx.DataDir;
        ServerBox.Text = ReadServer();
        AutoStartToggle.IsOn = AutoStart.IsEnabled();
        FakeAllToggle.IsOn = ReadBool("fakeAll");
    }

    private bool ReadBool(string key)
    {
        try
        {
            var path = Path.Combine(_ctx.DataDir, "config.json");
            if (!File.Exists(path)) return false;
            using var doc = JsonDocument.Parse(File.ReadAllText(path));
            if (doc.RootElement.TryGetProperty(key, out var v)) return v.GetBoolean();
        }
        catch { /* 忽略 */ }
        return false;
    }

    private string ReadServer()
    {
        try
        {
            var path = Path.Combine(_ctx.DataDir, "config.json");
            if (!File.Exists(path)) return "http://127.0.0.1:8090";
            using var doc = JsonDocument.Parse(File.ReadAllText(path));
            if (doc.RootElement.TryGetProperty("server", out var s)) return s.GetString() ?? "";
        }
        catch { /* 忽略 */ }
        return "http://127.0.0.1:8090";
    }

    private void WriteServer(string server)
    {
        var path = Path.Combine(_ctx.DataDir, "config.json");
        var doc = File.Exists(path)
            ? JsonSerializer.Deserialize<JsonElement>(File.ReadAllText(path))
            : JsonDocument.Parse("{}").RootElement;
        using var json = JsonDocument.Parse(doc.GetRawText());
        var dict = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(json.RootElement.GetRawText()) ?? new();
        dict["server"] = JsonSerializer.SerializeToElement(server);
        File.WriteAllText(path, JsonSerializer.Serialize(dict, new JsonSerializerOptions { WriteIndented = true }));
    }

    private void Save_Click(object sender, RoutedEventArgs e)
    {
        var server = ServerBox.Text.Trim();
        if (string.IsNullOrEmpty(server))
        {
            ResultText.Text = "服务器地址不能为空";
            return;
        }
        WriteServer(server);
        WriteBool("fakeAll", FakeAllToggle.IsOn);
        AutoStart.SetEnabled(AutoStartToggle.IsOn);
        _ctx.Watchdog.Restart();
        ResultText.Text = "已保存，核心进程已重启";
    }

    private void WriteBool(string key, bool value)
    {
        var path = Path.Combine(_ctx.DataDir, "config.json");
        var dict = File.Exists(path)
            ? JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(File.ReadAllText(path)) ?? new()
            : new();
        dict[key] = JsonSerializer.SerializeToElement(value);
        File.WriteAllText(path, JsonSerializer.Serialize(dict, new JsonSerializerOptions { WriteIndented = true }));
    }

    private async void OpenDir_Click(object sender, RoutedEventArgs e)
    {
        Directory.CreateDirectory(_ctx.DataDir);
        await Launcher.LaunchFolderPathAsync(_ctx.DataDir);
    }

    private void Exit_Click(object sender, RoutedEventArgs e)
    {
        MainWindow.ExitAction?.Invoke();
    }
}