namespace SimpleAdmin.Application;

/// <summary>
/// 管理端在链接发送前填写合同薪资、补贴等人事变量。
/// </summary>
public class OnboardingTaskContractVariableService : IOnboardingTaskContractVariableService
{
    private readonly SqlSugarScope _db;

    public OnboardingTaskContractVariableService()
        => _db = DbContext.DB;

    /// <summary>
    /// 查询任务下全部合同及其变量当前值。
    /// </summary>
    public async Task<List<OnboardingTaskContractVariableOutput>> List(
        OnboardingTaskContractVariableQueryInput input)
    {
        var task = await _db.Queryable<ObOnboardingTask>()
            .InSingleAsync(input.TaskId)
            ?? throw Oops.Bah("入职任务不存在");

        var contracts = await _db.Queryable<ObTaskContract>()
            .Where(x => x.TaskId == task.Id)
            .ToListAsync();

        var contractIds = contracts.Select(x => x.Id).ToList();
        var templateVersionIds = contracts.Select(x => x.TemplateVersionId).ToList();

        var variables = await _db.Queryable<ObTaskContractVariable>()
            .Where(x => contractIds.Contains(x.TaskContractId))
            .ToListAsync();

        var definitions = await _db.Queryable<ObTemplateVariable>()
            .Where(x => templateVersionIds.Contains(x.TemplateVersionId))
            .ToListAsync();

        return contracts.Select(contract => new OnboardingTaskContractVariableOutput
        {
            TaskContractId = contract.Id,
            ContractName = contract.ContractName,
            ContractType = contract.ContractType,

            Variables = variables
                .Where(variable => variable.TaskContractId == contract.Id)
                .OrderBy(variable => variable.VariableCode)
                .Select(variable =>
                {
                    var definition = definitions.FirstOrDefault(x =>
                        x.TemplateVersionId == contract.TemplateVersionId &&
                        x.VariableCode == variable.VariableCode);

                    var hrEditable = definition?.HrEditable == true;

                    return new OnboardingTaskContractVariableItemOutput
                    {
                        Id = variable.Id,
                        VariableCode = variable.VariableCode,
                        VariableName = variable.VariableName,
                        VariableType = variable.VariableType,
                        DataType = variable.DataType,
                        VariableValue = variable.VariableValue,
                        Required = definition?.Required == true,
                        HrEditable = hrEditable,
                        Editable =
                            variable.VariableType == ContractVariableType.Contract ||
                            (variable.VariableType == ContractVariableType.Company && hrEditable)
                    };
                })
                .ToList()
        }).ToList();
    }

    /// <summary>
    /// 保存允许人事编辑的任务合同变量值。
    /// </summary>
    public async Task Save(OnboardingTaskContractVariableSaveInput input)
    {
        var contract = await _db.Queryable<ObTaskContract>()
            .InSingleAsync(input.TaskContractId)
            ?? throw Oops.Bah("任务合同不存在");

        var task = await _db.Queryable<ObOnboardingTask>()
            .InSingleAsync(contract.TaskId)
            ?? throw Oops.Bah("入职任务不存在");

        if (task.TaskStatus != OnboardingTaskStatus.PendingFill &&
            task.TaskStatus != OnboardingTaskStatus.Rejected)
        {
            throw Oops.Bah("任务已提交审核，不能再修改合同参数");
        }

        var valueIds = input.Values
            .Select(x => x.Id)
            .Distinct()
            .ToList();

        var rows = await _db.Queryable<ObTaskContractVariable>()
            .Where(x =>
                x.TaskContractId == contract.Id &&
                valueIds.Contains(x.Id))
            .ToListAsync();

        if (rows.Count != valueIds.Count)
        {
            throw Oops.Bah("包含不属于该合同的变量");
        }

        var variableCodes = rows
            .Select(x => x.VariableCode)
            .ToList();

        var definitions = await _db.Queryable<ObTemplateVariable>()
            .Where(x =>
                x.TemplateVersionId == contract.TemplateVersionId &&
                variableCodes.Contains(x.VariableCode))
            .ToListAsync();

        foreach (var row in rows)
        {
            var definition = definitions.FirstOrDefault(x =>
                x.VariableCode == row.VariableCode)
                ?? throw Oops.Bah("合同变量定义不存在");

            if (row.VariableType != ContractVariableType.Contract &&
                !(row.VariableType == ContractVariableType.Company &&
                  definition.HrEditable))
            {
                throw Oops.Bah($"变量“{row.VariableName}”不允许人事手工修改");
            }

            var inputValue = input.Values.First(x => x.Id == row.Id);

            row.VariableValue = inputValue.VariableValue;
            row.SourceType = ContractVariableSourceType.HrInput;
            // 标记为手工覆盖后，后续刷新员工或公司自动变量时保留该值。
            row.IsManualOverride = true;
        }

        if (rows.Count > 0)
        {
            await _db.Updateable(rows)
                .ExecuteCommandAsync();
        }
    }
}