using HrynCo.NotificationService.DAL.Abstract.Repositories;
using HrynCo.NotificationService.DAL.Abstract.Templates;
using HrynCo.NotificationService.DAL.EF.Core;
using HrynCo.NotificationService.DAL.EF.Entities;
using Microsoft.EntityFrameworkCore;

namespace HrynCo.NotificationService.DAL.EF.Repositories;

internal sealed class TemplateRepository : NotificationEfRepository<TemplateEntity>, ITemplateRepository
{
    public TemplateRepository(NotificationDbContext dbContext) : base(dbContext)
    {
    }

    public async Task<IReadOnlyList<Template>> GetByServiceAsync(string serviceName, CancellationToken ct = default)
    {
        List<TemplateEntity> entities = await DbSet
            .Where(x => x.ServiceName == serviceName)
            .ToListAsync(ct);

        return entities.Select(MapToDomain).ToList();
    }

    public async Task<Template?> GetAsync(string serviceName, string key, string languageCode, CancellationToken ct = default)
    {
        TemplateEntity? entity = await DbSet.FirstOrDefaultAsync(
            x => x.ServiceName == serviceName && x.Key == key && x.LanguageCode == languageCode, ct);

        return entity is null ? null : MapToDomain(entity);
    }

    public Task AddAsync(Template template, CancellationToken ct = default) =>
        base.AddAsync(MapToEntity(template), ct);

    public Task UpdateAsync(Template template, CancellationToken ct = default)
    {
        TemplateEntity entity = MapToEntity(template);
        entity.Updated = DateTimeOffset.UtcNow;
        return base.UpdateAsync(entity, ct);
    }

    public async Task DeleteAsync(Template template, CancellationToken ct = default)
    {
        TemplateEntity? entity = await DbSet.FindAsync([template.Id], ct);
        if (entity is not null)
            await base.DeleteAsync(entity, ct);
    }

    private static Template MapToDomain(TemplateEntity e) => new()
    {
        Id = e.Id,
        ServiceName = e.ServiceName,
        Key = e.Key,
        LanguageCode = e.LanguageCode,
        Subject = e.Subject,
        HtmlBody = e.HtmlBody,
        TextBody = e.TextBody,
        Variables = e.Variables.Select(v => new TemplateVariable { Name = v.Name, Required = v.Required }).ToList(),
        Created = e.Created,
        Updated = e.Updated
    };

    private static TemplateEntity MapToEntity(Template t) => new()
    {
        Id = t.Id,
        ServiceName = t.ServiceName,
        Key = t.Key,
        LanguageCode = t.LanguageCode,
        Subject = t.Subject,
        HtmlBody = t.HtmlBody,
        TextBody = t.TextBody,
        Variables = t.Variables.Select(v => new TemplateVariableData { Name = v.Name, Required = v.Required }).ToList(),
        Created = t.Created,
        Updated = t.Updated
    };
}