using FluentValidation;
using Microsoft.AspNetCore.Mvc;
using Meezi.API.Models.Crm;
using Meezi.API.Services;
using Meezi.Core.Authorization;
using Meezi.Core.Interfaces;
using Meezi.Shared;

namespace Meezi.API.Controllers;

[Route("api/cafes/{cafeId}/customers")]
public class CustomersController : CafeApiControllerBase
{
    private readonly ICustomerService _customerService;
    private readonly IValidator<CreateCustomerRequest> _createValidator;
    private readonly IValidator<UpdateCustomerRequest> _updateValidator;

    public CustomersController(
        ICustomerService customerService,
        IValidator<CreateCustomerRequest> createValidator,
        IValidator<UpdateCustomerRequest> updateValidator)
    {
        _customerService = customerService;
        _createValidator = createValidator;
        _updateValidator = updateValidator;
    }

    [HttpGet]
    public async Task<IActionResult> Search(
        string cafeId,
        [FromQuery] string? q,
        ITenantContext tenant,
        CancellationToken cancellationToken)
    {
        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
        var data = await _customerService.SearchAsync(cafeId, q, cancellationToken);
        return Ok(new ApiResponse<IReadOnlyList<CustomerDto>>(true, data));
    }

    [HttpGet("{id}")]
    public async Task<IActionResult> Get(
        string cafeId,
        string id,
        ITenantContext tenant,
        CancellationToken cancellationToken)
    {
        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
        var data = await _customerService.GetAsync(cafeId, id, cancellationToken);
        if (data is null) return NotFoundError();
        return Ok(new ApiResponse<CustomerDto>(true, data));
    }

    [HttpPost]
    public async Task<IActionResult> Create(
        string cafeId,
        [FromBody] CreateCustomerRequest request,
        ITenantContext tenant,
        CancellationToken cancellationToken)
    {
        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
        if (EnsurePermission(tenant, Permission.CreateCustomer) is { } permDenied) return permDenied;
        var validation = await _createValidator.ValidateAsync(request, cancellationToken);
        if (!validation.IsValid) return BadRequest(ValidationError(validation));

        var data = await _customerService.CreateAsync(cafeId, request, cancellationToken);
        if (data is null)
            return BadRequest(new ApiResponse<object>(false, null,
                new ApiError("DUPLICATE_PHONE", "A customer with this phone already exists.")));

        return Ok(new ApiResponse<CustomerDto>(true, data));
    }

    [HttpPatch("{id}")]
    public async Task<IActionResult> Update(
        string cafeId,
        string id,
        [FromBody] UpdateCustomerRequest request,
        ITenantContext tenant,
        CancellationToken cancellationToken)
    {
        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
        if (EnsurePermission(tenant, Permission.EditCustomer) is { } permDenied) return permDenied;
        var validation = await _updateValidator.ValidateAsync(request, cancellationToken);
        if (!validation.IsValid) return BadRequest(ValidationError(validation));

        var existing = await _customerService.GetAsync(cafeId, id, cancellationToken);
        if (existing is null) return NotFoundError();

        var data = await _customerService.UpdateAsync(cafeId, id, request, cancellationToken);
        if (data is null)
            return BadRequest(new ApiResponse<object>(false, null,
                new ApiError("DUPLICATE_PHONE", "A customer with this phone already exists.")));

        return Ok(new ApiResponse<CustomerDto>(true, data));
    }

    [HttpDelete("{id}")]
    public async Task<IActionResult> Delete(
        string cafeId,
        string id,
        ITenantContext tenant,
        CancellationToken cancellationToken)
    {
        if (EnsureCafeAccess(cafeId, tenant) is { } denied) return denied;
        if (EnsurePermission(tenant, Permission.DeleteCustomer) is { } permDenied) return permDenied;
        var deleted = await _customerService.DeleteAsync(cafeId, id, cancellationToken);
        if (!deleted) return NotFoundError();
        return Ok(new ApiResponse<object>(true, new { id }));
    }
}