namespace SimpleAdmin.Web.Core;

/// <summary>
/// 提供员工端入职任务访问相关 HTTP 接口。
/// </summary>
[ApiDescriptionSettings("Application", Tag = "员工入职填写")]
[Route("open/onboarding")]
[AllowAnonymous]
public class OnboardingPublicTaskController
{
    private readonly IOnboardingPublicTaskService _service;
    private readonly IFileService _fileService;

    public OnboardingPublicTaskController(IOnboardingPublicTaskService service, IFileService fileService)
    {
        _service = service;
        _fileService = fileService;
    }

    /// <summary>
    /// 通过 Token 获取员工端入职任务详情。
    /// </summary>
    [HttpPost("detail")]
    public async Task<dynamic> Detail([FromBody] OnboardingTaskPublicAccessInput input)
    {
        return await _service.Detail(input);
    }

    /// <summary>
    /// 保存候选人固定基础信息。
    /// </summary>
    [HttpPost("save-employee-info")]
    public async Task SaveEmployeeInfo([FromBody] OnboardingTaskPublicSaveInput input)
    {
        await _service.SaveEmployeeInfo(input);
    }

    /// <summary>
    /// 校验合同变量并提前生成候选人的合同文件。
    /// </summary>
    [HttpPost("prepare-contract")]
    public async Task<OnboardingPublicContractPrepareOutput> PrepareContract(
        [FromBody] OnboardingPublicContractSourceInput input)
    {
        return await _service.PrepareContract(input);
    }

    /// <summary>
    /// 下载已经准备完成并替换变量的合同文件。
    /// </summary>
    [HttpGet("contract-source")]
    [ResponseCache(Location = ResponseCacheLocation.None, NoStore = true)]
    public async Task<FileStreamResult> ContractSource([FromQuery] OnboardingPublicContractSourceInput input)
    {
        var fileId = await _service.GetContractSourceFileId(input);
        return await _fileService.Download(new BaseIdInput { Id = fileId })
            ?? throw Oops.Bah("合同文件不存在，请重新准备合同");
    }

    /// <summary>
    /// 通过任务 Token 内联输出候选人已上传的图片材料，供手机端预览。
    /// </summary>
    [HttpGet("material-source")]
    public async Task<FileStreamResult> MaterialSource(
        [FromQuery] OnboardingPublicMaterialSourceInput input)
    {
        var material = await _service.GetMaterialSource(input);
        var source = await _fileService.Download(new BaseIdInput { Id = material.FileId })
            ?? throw Oops.Bah("上传文件不存在");
        return new FileStreamResult(
            source.FileStream,
            GetImageContentType(material.FileSuffix));
    }

    /// <summary>
    /// 根据图片扩展名设置浏览器可内联展示的响应类型。
    /// </summary>
    private static string GetImageContentType(string suffix)
    {
        return suffix?.TrimStart('.').ToLowerInvariant() switch
        {
            "png" => "image/png",
            "jpg" or "jpeg" => "image/jpeg",
            "gif" => "image/gif",
            "bmp" => "image/bmp",
            "webp" => "image/webp",
            _ => "application/octet-stream"
        };
    }
}