using Api.SeaHavenIndustries.Helper;
using Data.SeaHavenIndustries;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Interfaces;

namespace Api.SeaHavenIndustries.Controllers
{
    [Authorize]
    [ApiController]
    [Route("api/[controller]")]
    [Route("api/uplifts")]
    public class UpliftController : Controller
    {
        private readonly IUpliftService _upliftService;
        private readonly ILogger<UpliftController> _logger;

        public UpliftController(IUpliftService upliftService, ILogger<UpliftController> logger)
        {
            _upliftService = upliftService;
            _logger = logger;
        }

        [HttpGet]
        public async Task<IActionResult> List([FromQuery] string? status = "Pending", [FromQuery] int? tier = null, [FromQuery] int page = 1, [FromQuery] int pageSize = 25, CancellationToken cancellationToken = default)
        {
            var result = await _upliftService.ListAsync(User, status, tier, page, pageSize, cancellationToken);
            return Ok(new DataResponse { Status = "Success", Data = result });
        }

        [HttpGet("dispatch/{dispatchId:int}")]
        public async Task<IActionResult> ListForDispatch(int dispatchId, CancellationToken cancellationToken = default)
        {
            var items = await _upliftService.ListForDispatchAsync(User, dispatchId, cancellationToken);
            return Ok(new DataResponse { Status = "Success", Data = items });
        }

        [HttpPost("{id:int}/approve")]
        public async Task<IActionResult> Approve(int id, [FromBody] DecisionRequest? body, CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.ApproveAsync(User, id, body?.Note, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException ex)
            {
                return NotFound(new Response { Status = "Error", Message = _logger.Sanitize(ex, "Uplift request not found") });
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to perform this action on this uplift request") });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex, "This uplift request cannot be modified in its current state") });
            }
        }

        [HttpPost("{id:int}/deny")]
        public async Task<IActionResult> Deny(int id, [FromBody] DecisionRequest? body, CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.DenyAsync(User, id, body?.Note, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException ex)
            {
                return NotFound(new Response { Status = "Error", Message = _logger.Sanitize(ex, "Uplift request not found") });
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to perform this action on this uplift request") });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex, "This uplift request cannot be modified in its current state") });
            }
        }

        // SH-101: canonical reject route (result is Rejected); deny alias stays compatible.
        [HttpPost("{id:int}/reject")]
        public async Task<IActionResult> Reject(int id, [FromBody] DecisionRequest? body, CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.RejectAsync(User, id, body?.Note, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException ex)
            {
                return NotFound(new Response { Status = "Error", Message = _logger.Sanitize(ex, "Uplift request not found") });
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to perform this action on this uplift request") });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex, "This uplift request cannot be modified in its current state") });
            }
        }

        // SH-101: internal request-changes route (note + tier authorization + audit).
        [HttpPost("{id:int}/request-changes")]
        public async Task<IActionResult> RequestChanges(int id, [FromBody] DecisionRequest? body, CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.RequestChangesAsync(User, id, body?.Note ?? string.Empty, cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException ex)
            {
                return NotFound(new Response { Status = "Error", Message = _logger.Sanitize(ex, "Uplift request not found") });
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to perform this action on this uplift request") });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex, "This uplift request cannot be modified in its current state") });
            }
        }

        [HttpPost("{id:int}/revoke")]
        public async Task<IActionResult> Revoke(
            int id,
            [FromBody] DecisionRequest? body,
            CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.RevokeAsync(
                    User,
                    id,
                    body?.Note ?? string.Empty,
                    cancellationToken);
                return Ok(new DataResponse { Status = "Success", Data = result });
            }
            catch (KeyNotFoundException ex)
            {
                return NotFound(new Response { Status = "Error", Message = _logger.Sanitize(ex, "Uplift request not found") });
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to revoke this uplift") });
            }
            catch (InvalidOperationException ex)
            {
                return BadRequest(new Response { Status = "Error", Message = _logger.Sanitize(ex, "This uplift request cannot be revoked") });
            }
        }

        [HttpGet("can-approve")]
        public IActionResult CanApprove([FromQuery] int tier)
        {
            return Ok(new DataResponse { Status = "Success", Data = new { canApprove = _upliftService.CanApprove(User, tier) } });
        }

        // SH-101: authorized internal download of the Passed UpliftEvidence file linked to
        // a specific uplift request. Server-side linkage only; no vendor/public path or
        // document id is accepted from the client. 404 covers missing request/evidence and
        // any non-UpliftEvidence document; 423 covers a scan that has not Passed.
        [HttpGet("{id:int}/evidence")]
        public async Task<IActionResult> DownloadEvidence(int id, CancellationToken cancellationToken = default)
        {
            try
            {
                var result = await _upliftService.GetEvidenceForDownloadAsync(User, id, cancellationToken);
                return result.Outcome switch
                {
                    VendorDocumentDownloadOutcome.Ok => File(result.Content!, result.ContentType!, result.FileName!),
                    VendorDocumentDownloadOutcome.Locked => StatusCode(StatusCodes.Status423Locked, new Response { Status = "Locked", Message = "The uplift evidence is not available for download yet." }),
                    _ => NotFound(new Response { Status = "Error", Message = "Uplift evidence not found" })
                };
            }
            catch (UpliftForbiddenException ex)
            {
                return StatusCode(403, new Response { Status = "Error", Message = _logger.Sanitize(ex, "You are not authorized to view evidence for this uplift request") });
            }
        }

        public class DecisionRequest
        {
            public string? Note { get; set; }
        }
    }
}