namespace Admin.NET.Plugin.ApprovalFlow.Service;

/// <summary>
/// 审批意见模板服务
/// </summary>
[ApiDescriptionSettings(ApprovalFlowConst.GroupName, Order = 60)]
public class FlowCommentTemplateService : IDynamicApiController, ITransient
{
    private readonly SqlSugarRepository<ApprovalFlowCommentTemplate> _rep;
    private readonly UserManager _userManager;

    public FlowCommentTemplateService(
        SqlSugarRepository<ApprovalFlowCommentTemplate> rep,
        UserManager userManager)
    {
        _rep = rep;
        _userManager = userManager;
    }

    /// <summary>
    /// 获取当前用户可用的意见模板列表（公共 + 个人）
    /// </summary>
    [HttpGet]
    [ApiDescriptionSettings(Name = "MyList")]
    [DisplayName("获取意见模板列表")]
    public async Task<List<CommentTemplateOutput>> MyList()
    {
        var userId = _userManager.UserId;
        return await _rep.AsQueryable()
            .Where(t => t.IsEnabled && (t.UserId == null || t.UserId == userId))
            .OrderBy(t => t.OrderNo)
            .Select(t => new CommentTemplateOutput
            {
                Id = t.Id,
                Content = t.Content,
                IsSystem = t.IsSystem,
                IsMine = t.UserId != null && t.UserId == userId,
            })
            .ToListAsync();
    }

    /// <summary>
    /// 新增个人意见模板
    /// </summary>
    [HttpPost]
    [ApiDescriptionSettings(Name = "Add")]
    [DisplayName("新增意见模板")]
    public async Task<long> Add(CommentTemplateAddInput input)
    {
        var entity = new ApprovalFlowCommentTemplate
        {
            Content = input.Content,
            OrderNo = input.OrderNo ?? 100,
            IsSystem = false,
            UserId = _userManager.UserId,
            IsEnabled = true,
        };
        await _rep.InsertAsync(entity);
        return entity.Id;
    }

    /// <summary>
    /// 删除个人意见模板（系统预置不可删）
    /// </summary>
    [HttpPost]
    [ApiDescriptionSettings(Name = "Delete")]
    [DisplayName("删除意见模板")]
    public async Task Delete(BaseIdInput input)
    {
        var entity = await _rep.GetByIdAsync(input.Id)
            ?? throw Oops.Oh("模板不存在");
        if (entity.IsSystem)
            throw Oops.Oh("系统预置模板不可删除");
        if (entity.UserId != _userManager.UserId)
            throw Oops.Oh("只能删除自己的模板");
        await _rep.DeleteByIdAsync(input.Id);
    }

    /// <summary>
    /// 初始化系统预置意见模板（幂等）
    /// </summary>
    [NonAction]
    public async Task EnsureSystemTemplates()
    {
        var exists = await _rep.AsQueryable().AnyAsync(t => t.IsSystem);
        if (exists) return;

        var templates = new[]
        {
            "同意",
            "已审核，无问题",
            "情况属实，同意处理",
            "不同意，请补充材料后重新提交",
            "退回修改",
            "已阅，请按流程继续推进",
            "金额/数量有误，请核实后重新提交",
            "紧急事项，加急处理",
        };

        var order = 10;
        foreach (var content in templates)
        {
            await _rep.InsertAsync(new ApprovalFlowCommentTemplate
            {
                Content = content,
                OrderNo = order,
                IsSystem = true,
                UserId = null,
                IsEnabled = true,
            });
            order += 10;
        }
    }
}

public class CommentTemplateOutput
{
    public long Id { get; set; }
    public string Content { get; set; } = "";
    public bool IsSystem { get; set; }
    public bool IsMine { get; set; }
}

public class CommentTemplateAddInput
{
    [Required, MaxLength(512)]
    public string Content { get; set; } = "";
    public int? OrderNo { get; set; }
}