@page "/FirstTimeSetup"
@page "/FirstTimeSetup/Database"
@layout FirstTimeSetupLayout
@using LANCommander.SDK
@using LANCommander.Server.Settings
@using LANCommander.Server.Settings.Enums
@using Microsoft.Data.Sqlite
@using Microsoft.Extensions.Options
@using MySqlConnector
@using Npgsql
@inject SetupService SetupService
@inject SettingsProvider<Settings> SettingsProvider
@inject IOptions<Settings> Settings 
@inject NavigationManager NavigationManager
@inject IMessageService MessageService
@inject ILogger<Index> Logger

<PageTitle>Database Config - First Time Setup</PageTitle>

<Form Model="@Settings.Value" Loading="Loading" OnFinish="ValidateDatabaseConnection" Layout="FormLayout.Vertical">
    <FormItem>
        LANCommander requires a database to run. If you require something other than SQLite, configure that here.
    </FormItem>
    <FormItem Label="Database Provider">
        <Select
            @bind-Value="context.Server.Database.Provider"
            TItem="DatabaseProvider"
            TItemValue="DatabaseProvider"
            DataSource="Enum.GetValues<DatabaseProvider>()"
            OnSelectedItemChanged="OnDatabaseProviderChanged">
            <LabelTemplate Context="Value">@Value.GetDisplayName()</LabelTemplate>
            <ItemTemplate Context="Value">@Value.GetDisplayName()</ItemTemplate>
        </Select>
    </FormItem>
    <FormItem Label="Connection String">
        <Input @bind-Value="context.Server.Database.ConnectionString" />
    </FormItem>
    <FormItem WrapperColOffset="8" WrapperColSpan="16">
        <GridRow Justify="RowJustify.End" Style="margin-top: 16px;">
            <GridCol>
                <Button Type="ButtonType.Primary" HtmlType="submit">
                    Connect
                </Button>
            </GridCol>
        </GridRow>
    </FormItem>
</Form>

@code {
    [CascadingParameter] FirstTimeSetupLayout Layout { get; set; }
    
    bool Loading = false;

    protected override async Task OnInitializedAsync()
    {
        await Layout.ChangeCurrentStep(FirstTimeSetupStep.Database);

        if (Settings.Value.Server.Database.Provider != DatabaseProvider.Unknown)
        {
            var isSetupInitialized = await SetupService.IsSetupInitialized();
            if (isSetupInitialized)
                NavigationManager.NavigateTo("/");
        }
    }

    void OnDatabaseProviderChanged()
    {
        switch (Settings.Value.Server.Database.Provider)
        {
            case DatabaseProvider.SQLite:
                var dbPath = AppPaths.GetConfigPath("LANCommander.db");
                
                Settings.Value.Server.Database.ConnectionString = $"Data Source={dbPath};Cache=Shared";
                break;

            case DatabaseProvider.MySQL:
                Settings.Value.Server.Database.ConnectionString = "Server=localhost;Uid=root;Pwd=password;Database=LANCommander";
                break;

            case DatabaseProvider.PostgreSQL:
                Settings.Value.Server.Database.ConnectionString = "Host=localhost;Port=5432;Database=LANCommander;User Id=postgres;Password=password";
                break;
        }
    }

    async Task ValidateDatabaseConnection()
    {
        bool valid = false;

        Loading = true;
        StateHasChanged();
        await Task.Yield();

        try
        {
            SetupService.ValidateConnectionString(Settings.Value.Server.Database.Provider, Settings.Value.Server.Database.ConnectionString);

            valid = true;
        }
        catch (SqliteException ex)
        {
            Logger?.LogError(ex, "Could not use SQLite database connection");
            MessageService.Error($"Could not use SQLite database: {ex.Message}", 10);
        }
        catch (MySqlException ex)
        {
            Logger?.LogError(ex, "Could not connect to MySQL database");
            MessageService.Error($"Could not connect to MySQL database: {ex.Message}", 10);
        }
        catch (NpgsqlException ex)
        {
            Logger?.LogError(ex, "Could not connect to PostgreSQL database");
            MessageService.Error($"Could not connect to PostgreSQL database: {ex.Message}", 10);
        }
        catch (Exception ex)
        {
            Logger?.LogError(ex, "An unknown error occurred trying to access the database", 10);
            MessageService.Error("Could not validate the connection string!");
        }

        if (valid)
        {
            try
            {
                await InvokeAsync(async () =>
                {
                    await SetupService.ChangeProviderAsync(Settings.Value.Server.Database.Provider, Settings.Value.Server.Database.ConnectionString);
                    
                    SettingsProvider.Update(s =>
                    {
                        s.Server.Database.Provider = Settings.Value.Server.Database.Provider;
                        s.Server.Database.ConnectionString = Settings.Value.Server.Database.ConnectionString;
                    });

                    NavigationManager.NavigateTo("/FirstTimeSetup/Paths", true);
                });
            }
            catch (Exception ex)
            {
                Logger?.LogError(ex, "Could not initialize database!");
                MessageService.Error($"Could not initialize database: {ex.Message}", 10);
            }
        }

        Loading = false;
    }
}