using lxc_songlist.Data;
using lxc_songlist.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;

namespace lxc_songlist.Services;

public sealed class SiteSettingsService(
    IDbContextFactory<SongListDbContext> dbFactory,
    IOptions<SiteOptions> options)
{
    public const string RequestTemplateKey = "request_template";

    public async Task<string> GetRequestTemplateAsync(CancellationToken cancellationToken = default)
    {
        await using var db = await dbFactory.CreateDbContextAsync(cancellationToken);
        var setting = await db.SiteSettings.FindAsync([RequestTemplateKey], cancellationToken);
        return string.IsNullOrWhiteSpace(setting?.Value)
            ? options.Value.RequestTemplate
            : setting.Value;
    }

    public async Task SaveRequestTemplateAsync(string template, CancellationToken cancellationToken = default)
    {
        var cleanTemplate = string.IsNullOrWhiteSpace(template)
            ? options.Value.RequestTemplate
            : template.Trim();

        await using var db = await dbFactory.CreateDbContextAsync(cancellationToken);
        var setting = await db.SiteSettings.FindAsync([RequestTemplateKey], cancellationToken);
        if (setting is null)
        {
            db.SiteSettings.Add(new SiteSetting
            {
                Key = RequestTemplateKey,
                Value = cleanTemplate,
                UpdatedAt = DateTimeOffset.UtcNow
            });
        }
        else
        {
            setting.Value = cleanTemplate;
            setting.UpdatedAt = DateTimeOffset.UtcNow;
        }

        await db.SaveChangesAsync(cancellationToken);
    }

    public static string FormatRequest(string template, string title)
    {
        return template.Replace("{title}", title, StringComparison.OrdinalIgnoreCase);
    }
}