package projectworkflow

import "errors"

var (
	// ErrUnauthenticated 未提供认证 Token 或会话已失效
	ErrUnauthenticated = errors.New("unauthenticated: valid authentication token required")

	// ErrForbiddenNotCreator 仅项目创建人有权切换工作流或配置
	ErrForbiddenNotCreator = errors.New("forbidden: only project creator can switch active workflow")

	// ErrProjectNotFound 指定项目不存在或无权访问
	ErrProjectNotFound = errors.New("project not found")

	// ErrWorkflowNotFound 工作流未定义或未在当前项目启用
	ErrWorkflowNotFound = errors.New("workflow definition not found or disabled for project")

	// ErrConcurrentConflict 乐观锁版本冲突 (workflow_selection_version 不匹配)
	ErrConcurrentConflict = errors.New("conflict: workflow selection version mismatch")

	// ErrPrerequisiteNotMet 前置条件未满足 (例如缺少已批准的上游需求规格书)
	ErrPrerequisiteNotMet = errors.New("precondition failed: prerequisite upstream document not satisfied")

	// ErrInvalidInput 输入参数不合法
	ErrInvalidInput = errors.New("invalid parameter: required field missing or malformed")

	// ErrLegacySwitchBlocked 已启用实例化工作流治理，禁止旧式即时切换
	ErrLegacySwitchBlocked = errors.New("legacy workflow switch blocked: use project settings activation flow")
)