using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using ProposalSystem.Application.DTOs;
using ProposalSystem.Application.Interfaces;

namespace ProposalSystem.Api.Controllers;

/// <summary>
/// PR5: Pricing Library CRUD endpoints. Admins seed/manage reusable priced
/// reference items that feed the Bedrock RAG corpus.
///
/// GET {id} is reachable by the internal API key middleware (which assigns
/// the "admins" role) so the library-ingest Lambda can fetch item details.
/// </summary>
[ApiController]
[Route("api/pricing-library")]
[Authorize]
public class PricingLibraryController : ControllerBase
{
    private readonly IPricingLibraryService _pricingLibraryService;

    public PricingLibraryController(IPricingLibraryService pricingLibraryService)
    {
        _pricingLibraryService = pricingLibraryService;
    }

    [HttpGet("list")]
    [Authorize(Roles = "admins,sysadmins")]
    [ProducesResponseType(typeof(PagedResponse<PricingLibraryItemResponse>), 200)]
    public async Task<ActionResult<PagedResponse<PricingLibraryItemResponse>>> List(
        [FromQuery] int page = 1,
        [FromQuery] int pageSize = 25,
        CancellationToken ct = default)
    {
        var result = await _pricingLibraryService.ListAsync(page, pageSize, ct);
        return Ok(result);
    }

    /// <summary>
    /// Get a single pricing library item. Accessible by admins/sysadmins role,
    /// which includes internal Lambda callers (the internal API key middleware
    /// assigns the "admins" role).
    /// </summary>
    [HttpGet("{id:guid}")]
    [Authorize(Roles = "admins,sysadmins")]
    [ProducesResponseType(typeof(PricingLibraryItemResponse), 200)]
    [ProducesResponseType(404)]
    public async Task<ActionResult<PricingLibraryItemResponse>> GetById(
        Guid id,
        CancellationToken ct)
    {
        var result = await _pricingLibraryService.GetByIdAsync(id, ct);
        if (result == null) return NotFound();
        return Ok(result);
    }

    [HttpPost]
    [Authorize(Roles = "admins,sysadmins")]
    [ProducesResponseType(typeof(PricingLibraryItemResponse), 201)]
    [ProducesResponseType(400)]
    public async Task<ActionResult<PricingLibraryItemResponse>> Create(
        [FromBody] CreatePricingLibraryItemRequest request,
        CancellationToken ct)
    {
        var result = await _pricingLibraryService.CreateAsync(request, ct);
        return CreatedAtAction(nameof(GetById), new { id = result.Id }, result);
    }

    [HttpPut("{id:guid}")]
    [Authorize(Roles = "admins,sysadmins")]
    [ProducesResponseType(typeof(PricingLibraryItemResponse), 200)]
    [ProducesResponseType(400)]
    [ProducesResponseType(404)]
    public async Task<ActionResult<PricingLibraryItemResponse>> Update(
        Guid id,
        [FromBody] UpdatePricingLibraryItemRequest request,
        CancellationToken ct)
    {
        var result = await _pricingLibraryService.UpdateAsync(id, request, ct);
        if (result == null) return NotFound();
        return Ok(result);
    }

    [HttpDelete("{id:guid}")]
    [Authorize(Roles = "admins,sysadmins")]
    [ProducesResponseType(204)]
    [ProducesResponseType(404)]
    public async Task<IActionResult> Delete(
        Guid id,
        CancellationToken ct)
    {
        var deleted = await _pricingLibraryService.DeleteAsync(id, ct);
        if (!deleted) return NotFound();
        return NoContent();
    }
}