using AsbCloudApp.Data;
using AsbCloudApp.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

// For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
namespace AsbCloudWebApi.Controllers;


/// <summary>
/// CRUD контроллер dto связных со скважиной для админки.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TService"></typeparam>
[ApiController]
[Route("api/[controller]")]
[Authorize]
public abstract class CrudWellRelatedController<T, TService> : CrudController<T, TService>
    where T : IId, IWellRelated
    where TService : IRepositoryWellRelated<T>
{
    protected readonly IWellService wellService;

    protected CrudWellRelatedController(IWellService wellService, TService service)
        : base(service)
    {
        this.wellService = wellService;
    }

    /// <summary>
    /// Получение всех записей, доступных компании пользователя.
    /// </summary>
    /// <param name="token"></param>
    /// <returns></returns>
    [HttpGet]
    public override async Task<ActionResult<IEnumerable<T>>> GetAllAsync(CancellationToken token)
    {
        var idCompany = User.GetCompanyId();

        if (idCompany is null)
            return Forbid();

        var wells = await wellService.GetAsync(new() { IdCompany = idCompany }, token);
        if (!wells.Any())
            return NoContent();

        var idsWells = wells.Select(w => w.Id);
        var result = await service.GetByIdWellAsync(idsWells, token);
        return Ok(result);
    }

    /// <summary>
    /// Получение всех записей, для скважины.
    /// </summary>
    /// <param name="idWell"></param>
    /// <param name="token"></param>
    /// <returns></returns>
    [HttpGet("well/{idWell}")]
    public async Task<ActionResult<IEnumerable<T>>> GetByIdWellAsync(int idWell, CancellationToken token)
    {
        if (!await UserHasAccesToWellAsync(idWell, token))
            return Forbid();

        var result = await service.GetByIdWellAsync(idWell, token);
        return Ok(result);
    }

    /// <summary>
    /// Получить одну запись по Id
    /// </summary>
    /// <param name="id">id записи</param>
    /// <param name="token"></param>
    /// <returns>запись</returns>
    [HttpGet("{id}")]
    public override async Task<ActionResult<T?>> GetOrDefaultAsync(int id, CancellationToken token)
    {
        var actionResult = await base.GetOrDefaultAsync(id, token);
        if(actionResult.Result is OkObjectResult okResult)
        {
            if (okResult.Value is IWellRelated wellRelated)
                if (!await UserHasAccesToWellAsync(wellRelated.IdWell, token))
                    return Forbid();
        }
        
        return actionResult;
    }

    /// <summary>
    /// Добавить запись
    /// </summary>
    /// <param name="value">запись</param>
    /// <param name="token"></param>
    /// <returns>id</returns>
    [HttpPost]
    public override async Task<ActionResult<int>> InsertAsync([FromBody] T value, CancellationToken token)
    {
        if (!await UserHasAccesToWellAsync(value.IdWell, token))
            return Forbid();
        return await base.InsertAsync(value, token);
    }

    /// <summary>
    /// Добавить несколько записей<br/>
    /// При невозможности добавить любую из записей, все не будут добавлены.
    /// </summary>
    /// <param name="values">записи</param>
    /// <param name="token"></param>
    /// <returns>id</returns>
    [HttpPost("range")]
    public override async Task<ActionResult<int>> InsertRangeAsync([FromBody] IEnumerable<T> values, CancellationToken token)
    {
        var idsWells = values.Select(v => v.IdWell).Distinct();
        foreach (var idWell in idsWells)
            if (!await UserHasAccesToWellAsync(idWell, token))
                return Forbid();
        return await base.InsertRangeAsync(values, token);
    }

    /// <summary>
    /// Редактировать запись по id
    /// </summary>
    /// <param name="value">запись</param>
    /// <param name="token"></param>
    /// <returns>1 - успешно отредактировано, 0 - нет</returns>
    [HttpPut]
    public override async Task<ActionResult<int>> UpdateAsync([FromBody] T value, CancellationToken token)
    {
        if (!await UserHasAccesToWellAsync(value.IdWell, token))
            return Forbid();
        return await base.UpdateAsync(value, token);
    }

    /// <summary>
    /// Удалить запись по id
    /// </summary>
    /// <param name="id">id записи</param>
    /// <param name="token"></param>
    /// <returns>1 - успешно удалено, 0 - нет</returns>
    [HttpDelete("{id}")]
    public override async Task<ActionResult<int>> DeleteAsync(int id, CancellationToken token)
    {
        var item = await service.GetOrDefaultAsync(id, token);
        if (item is null)
            return NoContent();
        if (!await UserHasAccesToWellAsync(item.IdWell, token))
            return Forbid();
        return await base.DeleteAsync(id, token);
    }

    protected async Task<bool> UserHasAccesToWellAsync(int idWell, CancellationToken token)
    {
        var idCompany = User.GetCompanyId();
        if (idCompany is not null &&
            await wellService.IsCompanyInvolvedInWellAsync((int)idCompany, idWell, token)
                .ConfigureAwait(false))
            return true;
        return false;
    }
}