using Api.SeaHavenIndustries.Filters;
using Microsoft.AspNetCore.Mvc;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Interfaces;

namespace Api.SeaHavenIndustries.Controllers
{
    [ApiController]
    [Route("api/workorders")]
    public class WorkOrderIngestController : ControllerBase
    {
        private const int MaxBatchSize = 100;
        private readonly IWorkOrderIngestService _ingestService;

        public WorkOrderIngestController(IWorkOrderIngestService ingestService)
        {
            _ingestService = ingestService;
        }

        /// <summary>
        /// Idempotent upsert by ExternalWorkOrderId (Lambda cutover target).
        /// Auth: X-Ingest-Key header.
        /// </summary>
        [HttpPost("ingest")]
        [IngestApiKey]
        [ProducesResponseType(typeof(WorkOrderIngestBatchResultDto), StatusCodes.Status200OK)]
        public async Task<ActionResult<WorkOrderIngestBatchResultDto>> Ingest(
            [FromBody] WorkOrderIngestBatchRequestDto? batch,
            CancellationToken cancellationToken)
        {
            var items = NormalizeItems(batch);
            if (items.Count == 0)
                return BadRequest("At least one item with externalWorkOrderId is required.");

            if (items.Count > MaxBatchSize)
                return BadRequest($"Max {MaxBatchSize} items per request.");

            var result = await _ingestService.UpsertBatchAsync(items, cancellationToken);
            return Ok(result);
        }

        private static List<WorkOrderIngestPayloadDto> NormalizeItems(WorkOrderIngestBatchRequestDto? batch)
        {
            if (batch?.Items is { Count: > 0 })
                return batch.Items;

            return new List<WorkOrderIngestPayloadDto>();
        }
    }
}