package projectinstance

import (
	"time"

	"chat-agent-system/internal/workflowdef"
)

const (
	LifecyclePlanning = "planning"
	LifecycleActive   = "active"

	PlanEditPlanning = "planning"
	PlanEditLive     = "live"
	PlanEditFrozen   = "frozen"

	InstancePlanning = "planning"
	InstanceActive   = "active"

	DutyAuthor   = "author"
	DutyReviewer = "reviewer"
	DutyApprover = "approver"

	// DutyPolicySeparated 标准三职分离（缺省/空值等价）。
	DutyPolicySeparated = "separated"
	// DutyPolicyAuthorOnly 编制人兼任审核与批准。
	DutyPolicyAuthorOnly = "author_only"
)

// DocDuty 文档三权职责指派。
type DocDuty struct {
	AuthorUserID   int64 `json:"author_user_id,omitempty"`
	ReviewerUserID int64 `json:"reviewer_user_id,omitempty"`
	ApproverUserID int64 `json:"approver_user_id,omitempty"`
}

// DocTaskPlan 文档任务裁剪与职责。
type DocTaskPlan struct {
	TaskKey              string `json:"task_key"`
	TaskTitle            string `json:"task_title,omitempty"`
	Enabled              bool   `json:"enabled"`
	ApprovalConfigurable bool   `json:"approval_configurable,omitempty"`
	// DutyPolicy 逐文档职责模式；空或缺省按 separated 解读（omitempty 保证旧快照 hash 不变）。
	DutyPolicy string  `json:"duty_policy,omitempty"`
	Duties     DocDuty `json:"duties"`
}

// StagePlan 阶段裁剪与文档任务。
type StagePlan struct {
	StageKey  string        `json:"stage_key"`
	StageName string        `json:"stage_name,omitempty"`
	Enabled   bool          `json:"enabled"`
	DocTasks  []DocTaskPlan `json:"doc_tasks"`
}

// WorkflowPlan 项目工作流规划快照。
type WorkflowPlan struct {
	WorkflowDefinitionKey string      `json:"workflow_definition_key"`
	WorkflowVersion       int         `json:"workflow_version"`
	WorkflowVersionID     int64       `json:"workflow_version_id,omitempty"`
	Stages                []StagePlan `json:"stages"`
}

// WorkflowInstance 项目工作流实例。
type WorkflowInstance struct {
	ID                int64        `json:"id"`
	ProjectID         int64        `json:"project_id"`
	WorkflowVersionID int64        `json:"workflow_version_id"`
	InstanceNo        int          `json:"instance_no"`
	Status            string       `json:"status"`
	ConfigRevision    int          `json:"config_revision"`
	PlanHash          string       `json:"plan_hash"`
	ConfigSnapshot    WorkflowPlan `json:"config_snapshot"`
	ActivatedBy       *int64       `json:"activated_by,omitempty"`
	ActivatedAt       *time.Time   `json:"activated_at,omitempty"`
	CreatedBy         *int64       `json:"created_by,omitempty"`
	CreatedAt         time.Time    `json:"created_at"`
	UpdatedAt         time.Time    `json:"updated_at"`
}

// GovernancePolicyCapability 系统级编制人兼任总授权对项目设置的精简投影。
type GovernancePolicyCapability struct {
	Allowed       bool   `json:"allowed"`
	Revision      int64  `json:"revision"`
	BlockedReason string `json:"blocked_reason,omitempty"`
}

// ProjectSettings 项目设置聚合视图。
type ProjectSettings struct {
	ProjectID                int64             `json:"project_id"`
	LifecycleStatus          string            `json:"lifecycle_status"`
	ActiveWorkflowKey        string            `json:"active_workflow_key"`
	WorkflowSelectionVersion int               `json:"workflow_selection_version"`
	WorkflowPlanRevision     int               `json:"workflow_plan_revision"`
	Plan                     *WorkflowPlan     `json:"plan,omitempty"`
	PlanningInstance         *WorkflowInstance `json:"planning_instance,omitempty"`
	LiveInstance             *WorkflowInstance `json:"live_instance,omitempty"`
	CanEditPlan              bool              `json:"can_edit_plan"`
	CanActivate              bool              `json:"can_activate"`
	// PlanEditMode 是 planning | live | frozen。live 允许改职责/审批/启用，禁止切换工作流。
	PlanEditMode       string                     `json:"plan_edit_mode,omitempty"`
	ActiveStageKey     string                     `json:"active_stage_key,omitempty"`
	StageAdvanceReady  bool                       `json:"stage_advance_ready,omitempty"`
	PublishedWorkflows []PublishedOption          `json:"published_workflows,omitempty"`
	AuthorOnlyPolicy   GovernancePolicyCapability `json:"author_only_policy"`
}

// PublishedOption 可选已发布工作流。
type PublishedOption struct {
	DefinitionKey   string `json:"definition_key"`
	DefinitionName  string `json:"definition_name"`
	LatestVersion   int    `json:"latest_version"`
	WorkflowVersion int64  `json:"workflow_version_id"`
	ProductDomain   string `json:"product_domain,omitempty"`
}

// SavePlanInput 保存工作流规划。
type SavePlanInput struct {
	Plan                     WorkflowPlan `json:"plan"`
	ExpectedPlanRevision     int          `json:"expected_plan_revision"`
	ExpectedSelectionVersion int          `json:"expected_selection_version"`
	// LiveEdit 为 true 时走激活后的配置更新；缺省仍走规划保存（激活后拒绝）。
	LiveEdit bool `json:"live_edit,omitempty"`
}

// ActivationPreview 激活预览与确认令牌。
type ActivationPreview struct {
	ConfirmationToken      string                       `json:"confirmation_token"`
	PlanHash               string                       `json:"plan_hash"`
	ExpectedProjectVersion int                          `json:"expected_project_version"`
	ExpectedPlanRevision   int                          `json:"expected_plan_revision"`
	Summary                PreviewSummary               `json:"summary"`
	Validation             workflowdef.ValidationResult `json:"validation"`
	ExpiresAt              time.Time                    `json:"expires_at"`
}

// PreviewDocRef 预览中列出的例外文档。
type PreviewDocRef struct {
	TaskKey      string `json:"task_key"`
	Title        string `json:"title"`
	AuthorUserID int64  `json:"author_user_id,omitempty"`
}

// PreviewSummary 激活影响摘要。
type PreviewSummary struct {
	WorkflowName        string          `json:"workflow_name"`
	WorkflowVersion     int             `json:"workflow_version"`
	EnabledStages       int             `json:"enabled_stages"`
	EnabledDocTasks     int             `json:"enabled_doc_tasks"`
	GovernedDocTasks    int             `json:"governed_doc_tasks"`
	UnmanagedDocTasks   int             `json:"unmanaged_doc_tasks"`
	AssignedDuties      int             `json:"assigned_duties"`
	AuthorOnlyDocTasks  int             `json:"author_only_doc_tasks,omitempty"`
	UnmanagedDocuments  []PreviewDocRef `json:"unmanaged_documents,omitempty"`
	AuthorOnlyDocuments []PreviewDocRef `json:"author_only_documents,omitempty"`
	FirstStageKey       string          `json:"first_stage_key,omitempty"`
	FirstStageName      string          `json:"first_stage_name,omitempty"`
}

// ActivateInput 二次确认激活。
type ActivateInput struct {
	ConfirmationToken      string `json:"confirmation_token"`
	ExpectedProjectVersion int    `json:"expected_project_version"`
	ExpectedPlanRevision   int    `json:"expected_plan_revision"`
}

// ActivateResult 激活结果。
type ActivateResult struct {
	ProjectID         int64            `json:"project_id"`
	LifecycleStatus   string           `json:"lifecycle_status"`
	ActiveWorkflowKey string           `json:"active_workflow_key"`
	Instance          WorkflowInstance `json:"instance"`
}

const (
	StagePending   = "pending"
	StageActive    = "active"
	StageCompleted = "completed"
	StageSkipped   = "skipped"

	InstanceCompleted                 = "completed"
	InstanceTerminated                = "terminated"
	InstanceAwaitingStageConfirmation = "awaiting_stage_confirmation"
	InstanceTerminationRequested      = "termination_requested"
)

// IsLiveInstanceStatus 与 GetLiveInstance / HasLiveInstance 的 active 系过滤一致。
func IsLiveInstanceStatus(status string) bool {
	switch status {
	case InstanceActive, InstanceAwaitingStageConfirmation, InstanceTerminationRequested:
		return true
	default:
		return false
	}
}

// IsClosedInstanceStatus completed/terminated — 仍需 ABAC 拒绝，不得当作「从未激活」。
func IsClosedInstanceStatus(status string) bool {
	return status == InstanceCompleted || status == InstanceTerminated
}

// DocTaskInstance 文档任务运行实例。
type DocTaskInstance struct {
	ID       int64  `json:"id"`
	TaskKey  string `json:"task_key"`
	Enabled  bool   `json:"enabled"`
	Status   string `json:"status"`
	Approved bool   `json:"approved"`
}

// StageInstance 阶段运行实例。
type StageInstance struct {
	ID       int64             `json:"id"`
	StageKey string            `json:"stage_key"`
	Name     string            `json:"name,omitempty"`
	Position int               `json:"position"`
	Enabled  bool              `json:"enabled"`
	Status   string            `json:"status"`
	DocTasks []DocTaskInstance `json:"doc_tasks,omitempty"`
}

// InstanceDetail 工作流实例详情（含阶段树）。
type InstanceDetail struct {
	Instance       WorkflowInstance `json:"instance"`
	ActiveStageKey string           `json:"active_stage_key,omitempty"`
	Stages         []StageInstance  `json:"stages"`
}

// GateIssue 阶段门禁阻断项。
type GateIssue struct {
	Code    string `json:"code"`
	Message string `json:"message"`
	TaskKey string `json:"task_key,omitempty"`
}

// DocTaskReadiness 文档任务就绪状态。
type DocTaskReadiness struct {
	TaskKey         string `json:"task_key"`
	Required        bool   `json:"required"`
	Enabled         bool   `json:"enabled"`
	ApprovalManaged bool   `json:"approval_managed"`
	DocState        string `json:"doc_state"`
	Approved        bool   `json:"approved"`
}

// StageReadiness 阶段推进就绪评估。
type StageReadiness struct {
	InstanceID         int64              `json:"instance_id"`
	StageKey           string             `json:"stage_key"`
	StageName          string             `json:"stage_name"`
	Ready              bool               `json:"ready"`
	CanAdvance         bool               `json:"can_advance"`
	RequiresRecheckAck bool               `json:"requires_recheck_ack"`
	BlockingIssues     []GateIssue        `json:"blocking_issues"`
	DocTasks           []DocTaskReadiness `json:"doc_tasks"`
	ConfigRevision     int                `json:"config_revision"`
}

// AdvanceStageInput 创建者确认推进。
type AdvanceStageInput struct {
	StageKey               string `json:"stage_key"`
	ExpectedConfigRevision int    `json:"expected_config_revision"`
	// AcknowledgeRecheck records that the creator saw open recheck marks.
	// It does not clear those marks.
	AcknowledgeRecheck bool `json:"acknowledge_recheck"`
}

// AdvanceStageResult 阶段推进结果。
type AdvanceStageResult struct {
	Instance                   WorkflowInstance `json:"instance"`
	CompletedStage             string           `json:"completed_stage"`
	CompletedStageInstanceID   int64            `json:"completed_stage_instance_id,omitempty"`
	CompletedReadinessRevision int              `json:"completed_readiness_revision,omitempty"`
	NextStageKey               string           `json:"next_stage_key,omitempty"`
	InstanceDone               bool             `json:"instance_done"`
}