namespace SimpleAdmin.Application;

/// <summary>
/// 合同模板主档案；具体 DOCX 文件、变量与适用范围均挂在此档案下。
/// </summary>
public class OnboardingContractTemplateService : DbRepository<ObContractTemplate>, IOnboardingContractTemplateService
{
    /// <summary>
    /// 分页查询合同模板主档案。
    /// </summary>
    public async Task<SqlSugarPagedList<ObContractTemplate>> Page(OnboardingContractTemplatePageInput input)
    {
        return await Context.Queryable<ObContractTemplate>()
            .WhereIF(
                !string.IsNullOrWhiteSpace(input.TemplateName),
                it => it.TemplateName.Contains(input.TemplateName) || it.TemplateCode.Contains(input.TemplateName))
            .WhereIF(!string.IsNullOrWhiteSpace(input.ContractType), it => it.ContractType == input.ContractType)
            .WhereIF(!string.IsNullOrWhiteSpace(input.Status), it => it.Status == input.Status)
            .OrderByIF(!string.IsNullOrWhiteSpace(input.SortField), $"{input.SortField} {input.SortOrder}")
            .OrderBy(it => it.TemplateName)
            .ToPagedListAsync(input.PageNum, input.PageSize);
    }

    /// <summary>
    /// 查询合同模板详情。
    /// </summary>
    public async Task<ObContractTemplate> Detail(BaseIdInput input)
    {
        return await GetByIdAsync(input.Id) ?? throw Oops.Bah("合同模板不存在");
    }

    /// <summary>
    /// 新增合同模板主档案。
    /// </summary>
    public async Task Add(OnboardingContractTemplateAddInput input)
    {
        await EnsureCodeUnique(input.TemplateCode, 0);
        await InsertAsync(input.Adapt<ObContractTemplate>());
    }

    /// <summary>
    /// 编辑合同模板主档案。
    /// </summary>
    public async Task Edit(OnboardingContractTemplateEditInput input)
    {
        await Detail(new BaseIdInput { Id = input.Id });
        await EnsureCodeUnique(input.TemplateCode, input.Id);
        await UpdateAsync(input.Adapt<ObContractTemplate>());
    }

    /// <summary>
    /// 删除未被版本、适用范围或任务合同引用的模板。
    /// </summary>
    public async Task Delete(BaseIdListInput input)
    {
        if (input.Ids.Count == 0)
            return;

        var hasVersions = await Context.Queryable<ObContractTemplateVersion>()
            .AnyAsync(it => input.Ids.Contains(it.TemplateId));
        if (hasVersions)
            throw Oops.Bah("模板已有版本，不能删除");

        var hasScopes = await Context.Queryable<ObContractScope>()
            .AnyAsync(it => input.Ids.Contains(it.TemplateId));
        if (hasScopes)
            throw Oops.Bah("模板已配置适用范围，不能删除");

        var hasContracts = await Context.Queryable<ObTaskContract>()
            .AnyAsync(it => input.Ids.Contains(it.TemplateId));
        if (hasContracts)
            throw Oops.Bah("模板已生成入职合同，不能删除");

        await DeleteByIdsAsync(input.Ids.Cast<object>().ToArray());
    }

    /// <summary>
    /// 分页查询指定合同模板的版本。
    /// </summary>
    public async Task<SqlSugarPagedList<ObContractTemplateVersion>> VersionPage(OnboardingContractVersionPageInput input)
    {
        return await Context.Queryable<ObContractTemplateVersion>()
            .Where(it => it.TemplateId == input.TemplateId)
            .WhereIF(!string.IsNullOrWhiteSpace(input.VersionStatus), it => it.VersionStatus == input.VersionStatus)
            .OrderByDescending(it => it.CreateTime)
            .ToPagedListAsync(input.PageNum, input.PageSize);
    }

    /// <summary>
    /// 新增合同模板 DOCX 版本。
    /// </summary>
    public async Task AddVersion(OnboardingContractVersionAddInput input)
    {
        await Detail(new BaseIdInput { Id = input.TemplateId });

        var file = await Context.Queryable<SysFile>().InSingleAsync(input.SourceDocxFileId)
            ?? throw Oops.Bah("DOCX源文件不存在");
        if (!string.Equals(file.Suffix, "docx", StringComparison.OrdinalIgnoreCase))
            throw Oops.Bah("合同模板仅支持DOCX文件");

        var versionExists = await Context.Queryable<ObContractTemplateVersion>()
            .AnyAsync(it => it.TemplateId == input.TemplateId && it.VersionNo == input.VersionNo);
        if (versionExists)
            throw Oops.Bah("该模板版本号已存在");

        await Context.Insertable(input.Adapt<ObContractTemplateVersion>()).ExecuteCommandAsync();
    }

    /// <summary>
    /// 启用或停用合同模板版本。
    /// </summary>
    public async Task SetVersionStatus(OnboardingContractVersionStatusInput input)
    {
        if (input.VersionStatus != ContractTemplateVersionStatus.Enabled
            && input.VersionStatus != ContractTemplateVersionStatus.Disabled)
        {
            throw Oops.Bah("版本状态仅支持启用或停用");
        }

        var version = await Context.Queryable<ObContractTemplateVersion>().InSingleAsync(input.Id)
            ?? throw Oops.Bah("模板版本不存在");

        if (input.VersionStatus == ContractTemplateVersionStatus.Enabled)
        {
            var hasVariables = await Context.Queryable<ObTemplateVariable>()
                .AnyAsync(it => it.TemplateVersionId == input.Id);
            if (!hasVariables)
                throw Oops.Bah("请先配置模板变量后再启用");
        }

        version.VersionStatus = input.VersionStatus;
        await Context.Updateable(version).ExecuteCommandAsync();
    }

    /// <summary>
    /// 分页查询指定模板版本的变量定义。
    /// </summary>
    public async Task<SqlSugarPagedList<ObTemplateVariable>> VariablePage(OnboardingTemplateVariablePageInput input)
    {
        return await Context.Queryable<ObTemplateVariable>()
            .Where(it => it.TemplateVersionId == input.TemplateVersionId)
            .OrderBy(it => it.SortCode)
            .OrderBy(it => it.VariableCode)
            .ToPagedListAsync(input.PageNum, input.PageSize);
    }

    /// <summary>
    /// 为草稿模板版本新增变量。
    /// </summary>
    public async Task AddVariable(OnboardingTemplateVariableAddInput input)
    {
        await EnsureVersionDraft(input.TemplateVersionId);
        await EnsureVariableUnique(input.TemplateVersionId, input.VariableCode, 0);
        await Context.Insertable(input.Adapt<ObTemplateVariable>()).ExecuteCommandAsync();
    }

    /// <summary>
    /// 编辑草稿模板版本中的变量。
    /// </summary>
    public async Task EditVariable(OnboardingTemplateVariableEditInput input)
    {
        var variable = await Context.Queryable<ObTemplateVariable>().InSingleAsync(input.Id)
            ?? throw Oops.Bah("模板变量不存在");
        if (variable.TemplateVersionId != input.TemplateVersionId)
            throw Oops.Bah("不允许变更变量所属版本");

        await EnsureVersionDraft(input.TemplateVersionId);
        await EnsureVariableUnique(input.TemplateVersionId, input.VariableCode, input.Id);
        await Context.Updateable(input.Adapt<ObTemplateVariable>()).ExecuteCommandAsync();
    }

    /// <summary>
    /// 删除草稿模板版本中的变量。
    /// </summary>
    public async Task DeleteVariable(BaseIdListInput input)
    {
        if (input.Ids.Count == 0)
            return;

        var versionIds = await Context.Queryable<ObTemplateVariable>()
            .Where(it => input.Ids.Contains(it.Id))
            .Select(it => it.TemplateVersionId)
            .ToListAsync();

        foreach (var versionId in versionIds.Distinct())
            await EnsureVersionDraft(versionId);

        await Context.Deleteable<ObTemplateVariable>().In(input.Ids).ExecuteCommandAsync();
    }

    /// <summary>
    /// 分页查询合同适用范围。
    /// </summary>
    public async Task<SqlSugarPagedList<ObContractScope>> ScopePage(OnboardingContractScopePageInput input)
    {
        return await Context.Queryable<ObContractScope>()
            .WhereIF(input.CompanyId.HasValue, it => it.CompanyId == input.CompanyId.Value)
            .WhereIF(input.PositionId.HasValue, it => it.PositionId == input.PositionId.Value)
            .WhereIF(input.TemplateId.HasValue, it => it.TemplateId == input.TemplateId.Value)
            .OrderBy(it => it.SortCode)
            .ToPagedListAsync(input.PageNum, input.PageSize);
    }

    /// <summary>
    /// 新增公司或岗位的合同适用范围。
    /// </summary>
    public async Task AddScope(OnboardingContractScopeAddInput input)
    {
        await EnsureScopeValid(input.CompanyId, input.PositionId, input.TemplateId, input.TemplateVersionId);
        await EnsureScopeUnique(input.CompanyId, input.PositionId, input.TemplateVersionId, 0);
        await Context.Insertable(input.Adapt<ObContractScope>()).ExecuteCommandAsync();
    }

    /// <summary>
    /// 编辑合同适用范围。
    /// </summary>
    public async Task EditScope(OnboardingContractScopeEditInput input)
    {
        var scopeExists = await Context.Queryable<ObContractScope>().AnyAsync(it => it.Id == input.Id);
        if (!scopeExists)
            throw Oops.Bah("合同适用范围不存在");

        await EnsureScopeValid(input.CompanyId, input.PositionId, input.TemplateId, input.TemplateVersionId);
        await EnsureScopeUnique(input.CompanyId, input.PositionId, input.TemplateVersionId, input.Id);
        await Context.Updateable(input.Adapt<ObContractScope>()).ExecuteCommandAsync();
    }

    /// <summary>
    /// 删除合同适用范围。
    /// </summary>
    public async Task DeleteScope(BaseIdListInput input)
    {
        if (input.Ids.Count == 0)
            return;

        await Context.Deleteable<ObContractScope>().In(input.Ids).ExecuteCommandAsync();
    }

    private async Task EnsureCodeUnique(string code, long id)
    {
        var exists = await Context.Queryable<ObContractTemplate>()
            .AnyAsync(it => it.TemplateCode == code && it.Id != id);
        if (exists)
            throw Oops.Bah("模板编码已存在");
    }

    private async Task EnsureVersionDraft(long versionId)
    {
        var version = await Context.Queryable<ObContractTemplateVersion>().InSingleAsync(versionId)
            ?? throw Oops.Bah("模板版本不存在");
        if (version.VersionStatus != ContractTemplateVersionStatus.Draft)
            throw Oops.Bah("只有草稿版本可维护变量");
    }

    private async Task EnsureVariableUnique(long versionId, string code, long id)
    {
        var exists = await Context.Queryable<ObTemplateVariable>()
            .AnyAsync(it => it.TemplateVersionId == versionId && it.VariableCode == code && it.Id != id);
        if (exists)
            throw Oops.Bah("该版本变量编码已存在");
    }

    private async Task EnsureScopeValid(long companyId, long? positionId, long templateId, long versionId)
    {
        var companyExists = await Context.Queryable<ObCompany>()
            .AnyAsync(it => it.Id == companyId && it.Status == "enable");
        if (!companyExists)
            throw Oops.Bah("所属公司不存在或未启用");

        if (positionId.HasValue)
        {
            var positionExists = await Context.Queryable<ObPosition>()
                .AnyAsync(it => it.Id == positionId.Value && it.CompanyId == companyId && it.Status == "enable");
            if (!positionExists)
                throw Oops.Bah("岗位不存在、未启用或不属于该公司");
        }

        var version = await Context.Queryable<ObContractTemplateVersion>().InSingleAsync(versionId)
            ?? throw Oops.Bah("合同版本不存在");
        if (version.TemplateId != templateId || version.VersionStatus != ContractTemplateVersionStatus.Enabled)
            throw Oops.Bah("只能配置该模板的已启用合同版本");
    }

    private async Task EnsureScopeUnique(long companyId, long? positionId, long versionId, long id)
    {
        var exists = await Context.Queryable<ObContractScope>()
            .AnyAsync(it => it.CompanyId == companyId
                            && it.PositionId == positionId
                            && it.TemplateVersionId == versionId
                            && it.Id != id);
        if (exists)
            throw Oops.Bah("该公司、岗位和合同版本的适用范围已存在");
    }
}