package model

import (
	"html"
	"regexp"
	"strings"
	"time"
	"unicode/utf8"
)

var projectUnitHTMLTagPattern = regexp.MustCompile(`<[^>]+>`)

const ProjectUnitTitleMaxRunes = 240

func ProjectUnitWordCount(sourceText string) int {
	plainText := projectUnitHTMLTagPattern.ReplaceAllString(sourceText, "")
	return utf8.RuneCountInString(strings.TrimSpace(html.UnescapeString(plainText)))
}

func NormalizeProjectUnitTitle(value string) string {
	return strings.TrimSpace(value)
}

func ValidProjectUnitTitle(value string) bool {
	title := NormalizeProjectUnitTitle(value)
	return title != "" && utf8.RuneCountInString(title) <= ProjectUnitTitleMaxRunes
}

const AssetIDMaxLength = 80

type Resource struct {
	ID       string         `json:"id" gorm:"primaryKey;size:36"`
	UserID   string         `json:"userId" gorm:"index;size:36;index:idx_resources_user_created,priority:1;uniqueIndex:idx_resources_user_upload_key,priority:1"`
	Kind     string         `json:"kind" gorm:"index;size:24"`
	Status   ResourceStatus `json:"status" gorm:"index;size:24"`
	Provider string         `json:"provider" gorm:"size:24"`
	Endpoint string         `json:"endpoint"`
	Bucket   string         `json:"bucket" gorm:"size:160"`
	// 用户 OSS 每次修改都会生成新版本，资源固定引用创建时的存储与密钥；只有同一存储位置才可复用当前 CDN。
	StorageSettingID string `json:"-" gorm:"index;size:36"`
	ObjectKey        string `json:"objectKey" gorm:"index"`
	PublicURL        string `json:"publicUrl"`
	MimeType         string `json:"mimeType" gorm:"size:120"`
	Size             int64  `json:"size"`
	Width            int    `json:"width"`
	Height           int    `json:"height"`
	DurationMs       int64  `json:"durationMs"`
	ETag             string `json:"etag" gorm:"size:160"`
	// 浏览器兼容播放副本（HEVC/H.265 原片在 Chrome 等无法解码，由 ffmpeg 转 H.264）：
	// PlaybackStatus: none|processing|ready|failed；PlaybackObjectKey 为本地播放目录下的文件名。
	PlaybackStatus    string `json:"playbackStatus" gorm:"index;size:24"`
	PlaybackObjectKey string `json:"playbackObjectKey"`
	PlaybackError     string `json:"playbackError" gorm:"type:text"`
	// UploadKey 是客户端逻辑上传身份的摘要；NULL 表示不参与幂等约束。
	UploadKey *string   `json:"-" gorm:"size:64;uniqueIndex:idx_resources_user_upload_key,priority:2"`
	Error     string    `json:"error"`
	CreatedAt time.Time `json:"createdAt" gorm:"index:idx_resources_user_created,priority:2"`
	UpdatedAt time.Time `json:"updatedAt"`
}

// ResourceDeletionJob is the durable handoff between database deletion and
// physical object cleanup. Storage fields are frozen because the Resource row
// is removed in the same transaction that creates this job.
type ResourceDeletionJob struct {
	ID               string                 `json:"id" gorm:"primaryKey;size:36"`
	UserID           string                 `json:"userId" gorm:"index;size:36"`
	ResourceID       string                 `json:"resourceId" gorm:"index;size:36"`
	Provider         string                 `json:"provider" gorm:"size:24"`
	Endpoint         string                 `json:"endpoint"`
	Bucket           string                 `json:"bucket" gorm:"size:160"`
	StorageSettingID string                 `json:"-" gorm:"index;size:36"`
	ObjectKey        string                 `json:"objectKey" gorm:"index"`
	Status           ResourceDeletionStatus `json:"status" gorm:"index:idx_resource_deletion_jobs_due,priority:1;size:24"`
	Attempts         int                    `json:"attempts"`
	LastError        string                 `json:"lastError" gorm:"type:text"`
	NextAttemptAt    time.Time              `json:"nextAttemptAt" gorm:"index:idx_resource_deletion_jobs_due,priority:2"`
	LeaseOwner       string                 `json:"-" gorm:"index;size:120"`
	LeaseExpiresAt   *time.Time             `json:"-" gorm:"index"`
	CreatedAt        time.Time              `json:"createdAt"`
	UpdatedAt        time.Time              `json:"updatedAt"`
}

// AnnouncementImageDraft marks an uploaded image as temporary until an
// announcement create or update transaction consumes it.
type AnnouncementImageDraft struct {
	ResourceID string    `json:"resourceId" gorm:"primaryKey;size:36"`
	UserID     string    `json:"userId" gorm:"index;size:36"`
	CreatedAt  time.Time `json:"createdAt" gorm:"index"`
}

type Asset struct {
	ID               string             `json:"id" gorm:"primaryKey;size:80"`
	UserID           string             `json:"userId" gorm:"index;size:36;index:idx_assets_user_updated,priority:1"`
	FolderID         string             `json:"folderId,omitempty" gorm:"index;size:36"`
	Kind             string             `json:"kind" gorm:"index;size:24"`
	Category         AssetCategory      `json:"category" gorm:"index;size:32"`
	Status           AssetVersionStatus `json:"status" gorm:"index;size:24"`
	PrimaryVersionID string             `json:"primaryVersionId,omitempty" gorm:"index;size:36"`
	Title            string             `json:"title" gorm:"size:240"`
	PayloadJSON      string             `json:"payloadJson" gorm:"type:text"`
	CreatedAt        time.Time          `json:"createdAt"`
	UpdatedAt        time.Time          `json:"updatedAt" gorm:"index:idx_assets_user_updated,priority:2"`
}

// AssetFolder 是用户素材库的一层自定义分类；业务分类仍由 Asset.Category 表达。
type AssetFolder struct {
	ID        string    `json:"id" gorm:"primaryKey;size:36"`
	UserID    string    `json:"userId" gorm:"index;size:36;uniqueIndex:idx_asset_folders_user_name,priority:1"`
	Name      string    `json:"name" gorm:"size:80"`
	NameKey   string    `json:"-" gorm:"size:80;uniqueIndex:idx_asset_folders_user_name,priority:2"`
	Position  int       `json:"position" gorm:"index"`
	CreatedAt time.Time `json:"createdAt"`
	UpdatedAt time.Time `json:"updatedAt"`
}

type ProjectAssetLink struct {
	ID        string    `json:"id" gorm:"primaryKey;size:36"`
	ProjectID string    `json:"projectId" gorm:"index;size:36;uniqueIndex:idx_project_asset_links_unique,priority:1;index:idx_project_asset_links_project_folder_position,priority:1"`
	AssetID   string    `json:"assetId" gorm:"index;size:80;uniqueIndex:idx_project_asset_links_unique,priority:2"`
	FolderID  string    `json:"folderId,omitempty" gorm:"index;size:36;index:idx_project_asset_links_project_folder_position,priority:2"`
	Position  int       `json:"position" gorm:"index;index:idx_project_asset_links_project_folder_position,priority:3"`
	CreatedAt time.Time `json:"createdAt"`
}

// ProjectAssetFolder 只保存项目内的目录结构；真实媒体仍由 Asset/Resource 唯一持有。
type ProjectAssetFolder struct {
	ID        string    `json:"id" gorm:"primaryKey;size:36"`
	ProjectID string    `json:"projectId" gorm:"index;size:36;uniqueIndex:idx_project_asset_folders_sibling_name,priority:1"`
	ParentID  string    `json:"parentId,omitempty" gorm:"index;size:36;uniqueIndex:idx_project_asset_folders_sibling_name,priority:2"`
	Name      string    `json:"name" gorm:"size:240"`
	NameKey   string    `json:"-" gorm:"size:240;uniqueIndex:idx_project_asset_folders_sibling_name,priority:3"`
	Style     string    `json:"style" gorm:"size:24"`
	Theme     string    `json:"theme" gorm:"size:24"`
	Position  int       `json:"position" gorm:"index"`
	CreatedAt time.Time `json:"createdAt"`
	UpdatedAt time.Time `json:"updatedAt"`
}

type ProjectAssetCandidate struct {
	ID              string        `json:"id" gorm:"primaryKey;size:36"`
	ProjectID       string        `json:"projectId" gorm:"index;size:36;index:idx_project_asset_candidates_project_unit_status,priority:1;index:idx_project_asset_candidates_project_status_category,priority:1"`
	UnitID          string        `json:"unitId,omitempty" gorm:"index;size:36;index:idx_project_asset_candidates_project_unit_status,priority:2"`
	ShotID          string        `json:"shotId,omitempty" gorm:"index;size:36"`
	Name            string        `json:"name" gorm:"size:240"`
	NameKey         string        `json:"-" gorm:"index;size:240"`
	Category        AssetCategory `json:"category" gorm:"index;size:32;index:idx_project_asset_candidates_project_status_category,priority:3"`
	Status          string        `json:"status" gorm:"index;size:32;index:idx_project_asset_candidates_project_unit_status,priority:3;index:idx_project_asset_candidates_project_status_category,priority:2"`
	Source          string        `json:"source,omitempty" gorm:"index;size:48"`
	DetailsJSON     string        `json:"detailsJson" gorm:"type:text"`
	ResolvedAssetID string        `json:"resolvedAssetId,omitempty" gorm:"index;size:80"`
	CreatedAt       time.Time     `json:"createdAt"`
	UpdatedAt       time.Time     `json:"updatedAt"`
}

type AssetVersion struct {
	ID             string             `json:"id" gorm:"primaryKey;size:36"`
	AssetID        string             `json:"assetId" gorm:"index;size:80;uniqueIndex:idx_asset_versions_number,priority:1"`
	Version        int                `json:"version" gorm:"uniqueIndex:idx_asset_versions_number,priority:2"`
	Status         AssetVersionStatus `json:"status" gorm:"index;size:24"`
	DefinitionJSON string             `json:"definitionJson" gorm:"type:text"`
	Prompt         string             `json:"prompt" gorm:"type:text"`
	Note           string             `json:"note" gorm:"size:500"`
	CreatedAt      time.Time          `json:"createdAt"`
	UpdatedAt      time.Time          `json:"updatedAt"`
}

type AssetRepresentation struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	TaskID         string    `json:"taskId,omitempty" gorm:"index;size:36;uniqueIndex:idx_asset_representations_task_role,priority:1"`
	AssetVersionID string    `json:"assetVersionId" gorm:"index;size:36;uniqueIndex:idx_asset_representations_version_role,priority:1"`
	ResourceID     string    `json:"resourceId,omitempty" gorm:"index;size:36"`
	MediaType      string    `json:"mediaType" gorm:"index;size:24"`
	Role           string    `json:"role" gorm:"index;size:32;uniqueIndex:idx_asset_representations_task_role,priority:2;uniqueIndex:idx_asset_representations_version_role,priority:2"`
	MetadataJSON   string    `json:"metadataJson" gorm:"type:text"`
	CreatedAt      time.Time `json:"createdAt"`
}

// VoiceProfile 是可复用的声音身份；试听音频只是表现资源，不等同于声音本身。
type VoiceProfile struct {
	ID                   string    `json:"id" gorm:"primaryKey;size:36"`
	UserID               string    `json:"userId" gorm:"index;size:36;uniqueIndex:idx_voice_profiles_user_provider_key,priority:1"`
	Name                 string    `json:"name" gorm:"size:160"`
	Provider             string    `json:"provider" gorm:"size:48;uniqueIndex:idx_voice_profiles_user_provider_key,priority:2"`
	VoiceKey             string    `json:"voiceKey" gorm:"size:160;uniqueIndex:idx_voice_profiles_user_provider_key,priority:3"`
	Language             string    `json:"language" gorm:"size:80"`
	Timbre               string    `json:"timbre" gorm:"size:240"`
	SampleResourceID     string    `json:"sampleResourceId,omitempty" gorm:"index;size:36"`
	CompatibleModelsJSON string    `json:"compatibleModelsJson" gorm:"type:text"`
	Status               string    `json:"status" gorm:"index;size:24"`
	CreatedAt            time.Time `json:"createdAt"`
	UpdatedAt            time.Time `json:"updatedAt"`
}

type CharacterVoiceBinding struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	AssetVersionID string    `json:"assetVersionId" gorm:"uniqueIndex;size:36"`
	VoiceProfileID string    `json:"voiceProfileId" gorm:"index;size:36"`
	Instructions   string    `json:"instructions" gorm:"type:text"`
	CreatedAt      time.Time `json:"createdAt"`
	UpdatedAt      time.Time `json:"updatedAt"`
}

// Project 是短剧领域聚合根；CanvasProject 仍代表可独立创作的画布文档。
type Project struct {
	ID                string        `json:"id" gorm:"primaryKey;size:36"`
	UserID            string        `json:"userId" gorm:"index;size:36;uniqueIndex:idx_projects_user_name,priority:1"`
	Name              string        `json:"name" gorm:"size:240;uniqueIndex:idx_projects_user_name,priority:2"`
	Type              string        `json:"type" gorm:"size:32;index"`
	AspectRatio       string        `json:"aspectRatio" gorm:"size:16"`
	SourceType        string        `json:"sourceType" gorm:"size:32"`
	Description       string        `json:"description" gorm:"type:text"`
	CoverResourceID   string        `json:"coverResourceId,omitempty" gorm:"index;size:36"`
	StylePresetID     string        `json:"stylePresetId" gorm:"size:64"`
	StyleProfileJSON  string        `json:"styleProfileJson" gorm:"type:text"`
	DefaultImageModel string        `json:"defaultImageModel,omitempty" gorm:"size:500"`
	DefaultVideoModel string        `json:"defaultVideoModel,omitempty" gorm:"size:500"`
	Status            ProjectStatus `json:"status" gorm:"index;size:24"`
	Revision          int64         `json:"revision"`
	CreatedAt         time.Time     `json:"createdAt"`
	UpdatedAt         time.Time     `json:"updatedAt" gorm:"index"`
}

// StyleProfile 是用户可持续编辑的风格源；项目只保存应用当时的 JSON 快照，避免源对象更新污染历史生成。
type StyleProfile struct {
	ID          string     `json:"id" gorm:"primaryKey;size:36"`
	UserID      string     `json:"userId" gorm:"index;size:36;index:idx_style_profiles_user_updated,priority:1"`
	Name        string     `json:"name" gorm:"size:160"`
	Description string     `json:"description" gorm:"size:500"`
	CoverURL    string     `json:"coverUrl" gorm:"type:text"`
	TagsJSON    string     `json:"tagsJson" gorm:"type:text"`
	ProfileJSON string     `json:"profileJson" gorm:"type:text"`
	Favorite    bool       `json:"favorite" gorm:"index"`
	LastUsedAt  *time.Time `json:"lastUsedAt,omitempty" gorm:"index"`
	Revision    int64      `json:"revision"`
	CreatedAt   time.Time  `json:"createdAt"`
	UpdatedAt   time.Time  `json:"updatedAt" gorm:"index:idx_style_profiles_user_updated,priority:2"`
}

type ProjectUnit struct {
	ID         string            `json:"id" gorm:"primaryKey;size:36"`
	ProjectID  string            `json:"projectId" gorm:"index;size:36;index:idx_project_units_project_position,priority:1"`
	ParentID   string            `json:"parentId,omitempty" gorm:"index;size:36"`
	Kind       ProjectUnitKind   `json:"kind" gorm:"index;size:24"`
	Title      string            `json:"title" gorm:"size:240"`
	SourceText string            `json:"sourceText" gorm:"type:text"`
	WordCount  int               `json:"wordCount"`
	Status     ProjectUnitStatus `json:"status" gorm:"index;size:24"`
	Position   int               `json:"position" gorm:"index:idx_project_units_project_position,priority:2"`
	CreatedAt  time.Time         `json:"createdAt"`
	UpdatedAt  time.Time         `json:"updatedAt"`
}

type CanvasUnitLink struct {
	ID        string    `json:"id" gorm:"primaryKey;size:36"`
	ProjectID string    `json:"projectId" gorm:"index;size:36;uniqueIndex:idx_canvas_unit_links_unique,priority:1;index:idx_canvas_unit_links_project_unit,priority:1"`
	CanvasID  string    `json:"canvasId" gorm:"index;size:80;uniqueIndex:idx_canvas_unit_links_unique,priority:2"`
	UnitID    string    `json:"unitId" gorm:"index;size:36;uniqueIndex:idx_canvas_unit_links_unique,priority:3;index:idx_canvas_unit_links_project_unit,priority:2"`
	Role      string    `json:"role" gorm:"size:32"`
	CreatedAt time.Time `json:"createdAt"`
}

type Shot struct {
	ID                string    `json:"id" gorm:"primaryKey;size:36"`
	ProjectID         string    `json:"projectId" gorm:"index;size:36;index:idx_shots_project_unit_position,priority:1"`
	UnitID            string    `json:"unitId" gorm:"index;size:36;index:idx_shots_project_unit_position,priority:2"`
	CurrentRevisionID string    `json:"currentRevisionId,omitempty" gorm:"index;size:36"`
	Title             string    `json:"title" gorm:"size:240"`
	Description       string    `json:"description" gorm:"type:text"`
	Position          int       `json:"position" gorm:"index:idx_shots_project_unit_position,priority:3"`
	DurationMs        int64     `json:"durationMs"`
	Status            string    `json:"status" gorm:"index;size:24"`
	CreatedAt         time.Time `json:"createdAt"`
	UpdatedAt         time.Time `json:"updatedAt"`
}

// ShotRevision 保存可复现的分镜脚本版本；Shot 只保留稳定身份、排序和当前版本指针。
type ShotRevision struct {
	ID              string    `json:"id" gorm:"primaryKey;size:36"`
	ShotID          string    `json:"shotId" gorm:"index;size:36;uniqueIndex:idx_shot_revisions_version,priority:1"`
	Version         int       `json:"version" gorm:"uniqueIndex:idx_shot_revisions_version,priority:2"`
	PlotDescription string    `json:"plotDescription" gorm:"type:text"`
	Action          string    `json:"action" gorm:"type:text"`
	Dialogue        string    `json:"dialogue" gorm:"type:text"`
	ShotSize        string    `json:"shotSize" gorm:"size:80"`
	CameraAngle     string    `json:"cameraAngle" gorm:"size:80"`
	CameraMovement  string    `json:"cameraMovement" gorm:"size:120"`
	DurationMs      int64     `json:"durationMs"`
	ImagePrompt     string    `json:"imagePrompt" gorm:"type:text"`
	VideoPrompt     string    `json:"videoPrompt" gorm:"type:text"`
	NegativePrompt  string    `json:"negativePrompt" gorm:"type:text"`
	ContinuityNotes string    `json:"continuityNotes" gorm:"type:text"`
	ActionBeatsJSON string    `json:"actionBeatsJson" gorm:"type:text"`
	CreatedBy       string    `json:"createdBy,omitempty" gorm:"index;size:36"`
	CreatedAt       time.Time `json:"createdAt"`
}

// ShotArtifact 是镜头的版本化生产产物。修改分镜或资产引用时只标记 stale，不删除历史。
type ShotArtifact struct {
	ID           string    `json:"id" gorm:"primaryKey;size:36"`
	ProjectID    string    `json:"projectId" gorm:"index;size:36;index:idx_shot_artifacts_project_unit,priority:1"`
	UnitID       string    `json:"unitId" gorm:"index;size:36;index:idx_shot_artifacts_project_unit,priority:2"`
	ShotID       string    `json:"shotId" gorm:"index;size:36;uniqueIndex:idx_shot_artifacts_version,priority:1"`
	RevisionID   string    `json:"revisionId,omitempty" gorm:"index;size:36"`
	TaskID       string    `json:"taskId,omitempty" gorm:"index;size:36"`
	Type         string    `json:"type" gorm:"index;size:40;uniqueIndex:idx_shot_artifacts_version,priority:2"`
	Version      int       `json:"version" gorm:"uniqueIndex:idx_shot_artifacts_version,priority:3"`
	ResourceID   string    `json:"resourceId,omitempty" gorm:"index;size:36"`
	Status       string    `json:"status" gorm:"index;size:24"`
	Selected     bool      `json:"selected" gorm:"index"`
	MetadataJSON string    `json:"metadataJson" gorm:"type:text"`
	CreatedAt    time.Time `json:"createdAt"`
	UpdatedAt    time.Time `json:"updatedAt"`
}

type ShotAssetReference struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	ShotID         string    `json:"shotId" gorm:"index;size:36;uniqueIndex:idx_shot_asset_reference_unique,priority:1"`
	AssetVersionID string    `json:"assetVersionId" gorm:"index;size:36;uniqueIndex:idx_shot_asset_reference_unique,priority:2"`
	Role           string    `json:"role" gorm:"index;size:32;uniqueIndex:idx_shot_asset_reference_unique,priority:3"`
	Status         string    `json:"status" gorm:"index;size:24"`
	CreatedAt      time.Time `json:"createdAt"`
}

type WorkflowTemplateVersion struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	TemplateKey    string    `json:"templateKey" gorm:"size:80;uniqueIndex:idx_workflow_template_version,priority:1"`
	Name           string    `json:"name" gorm:"size:160"`
	Version        int       `json:"version" gorm:"uniqueIndex:idx_workflow_template_version,priority:2"`
	DefinitionJSON string    `json:"definitionJson" gorm:"type:text"`
	CreatedAt      time.Time `json:"createdAt"`
}

type WorkflowInstance struct {
	ID                string         `json:"id" gorm:"primaryKey;size:36"`
	ProjectID         string         `json:"projectId" gorm:"index;size:36;uniqueIndex:idx_workflow_instance_scope,priority:1"`
	UnitID            string         `json:"unitId,omitempty" gorm:"index;size:36;uniqueIndex:idx_workflow_instance_scope,priority:2"`
	TemplateVersionID string         `json:"templateVersionId" gorm:"index;size:36;uniqueIndex:idx_workflow_instance_scope,priority:3"`
	Scope             string         `json:"scope" gorm:"index;size:24"`
	Status            WorkflowStatus `json:"status" gorm:"index;size:24"`
	Revision          int64          `json:"revision"`
	CreatedAt         time.Time      `json:"createdAt"`
	UpdatedAt         time.Time      `json:"updatedAt"`
}

type WorkflowStepInstance struct {
	ID                 string             `json:"id" gorm:"primaryKey;size:36"`
	WorkflowInstanceID string             `json:"workflowInstanceId" gorm:"index;size:36;uniqueIndex:idx_workflow_steps_instance_key,priority:1"`
	StepKey            string             `json:"stepKey" gorm:"size:80;uniqueIndex:idx_workflow_steps_instance_key,priority:2"`
	Name               string             `json:"name" gorm:"size:160"`
	Position           int                `json:"position"`
	Status             WorkflowStepStatus `json:"status" gorm:"index;size:24"`
	InputJSON          string             `json:"inputJson" gorm:"type:text"`
	OutputJSON         string             `json:"outputJson" gorm:"type:text"`
	Error              string             `json:"error" gorm:"type:text"`
	StartedAt          *time.Time         `json:"startedAt"`
	CompletedAt        *time.Time         `json:"completedAt"`
	CreatedAt          time.Time          `json:"createdAt"`
	UpdatedAt          time.Time          `json:"updatedAt"`
}

type WorkflowStepTask struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	WorkflowStepID string    `json:"workflowStepId" gorm:"index;size:36;uniqueIndex:idx_workflow_step_tasks_unique,priority:1"`
	TaskID         string    `json:"taskId" gorm:"index;size:36;uniqueIndex:idx_workflow_step_tasks_unique,priority:2"`
	CreatedAt      time.Time `json:"createdAt"`
}

// ProductionTaskLink 显式区分领域项目、画布和镜头上下文，避免继续复用 Task.ProjectID 表达多种身份。
type ProductionTaskLink struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	TaskID         string    `json:"taskId" gorm:"index;size:36;uniqueIndex:idx_production_task_context,priority:1"`
	ProjectID      string    `json:"projectId" gorm:"index;size:36"`
	CanvasID       string    `json:"canvasId,omitempty" gorm:"index;size:80"`
	UnitID         string    `json:"unitId,omitempty" gorm:"index;size:36"`
	ShotID         string    `json:"shotId,omitempty" gorm:"index;size:36;uniqueIndex:idx_production_task_context,priority:2"`
	WorkflowStepID string    `json:"workflowStepId,omitempty" gorm:"index;size:36"`
	ArtifactType   string    `json:"artifactType,omitempty" gorm:"index;size:40;uniqueIndex:idx_production_task_context,priority:3"`
	CreatedAt      time.Time `json:"createdAt"`
	UpdatedAt      time.Time `json:"updatedAt"`
}

type CanvasProject struct {
	ID          string    `json:"id" gorm:"primaryKey;size:80"`
	UserID      string    `json:"userId" gorm:"index;size:36;index:idx_canvas_projects_user_updated,priority:1;index:idx_canvas_projects_user_project_updated,priority:1"`
	ProjectID   string    `json:"projectId,omitempty" gorm:"index;size:36;index:idx_canvas_projects_user_project_updated,priority:2"`
	Title       string    `json:"title" gorm:"size:240"`
	PayloadJSON string    `json:"payloadJson" gorm:"type:text"`
	Revision    int64     `json:"revision" gorm:"not null;default:1"`
	CreatedAt   time.Time `json:"createdAt"`
	UpdatedAt   time.Time `json:"updatedAt" gorm:"index:idx_canvas_projects_user_updated,priority:2;index:idx_canvas_projects_user_project_updated,priority:3"`
}

type CanvasShare struct {
	ID          string     `json:"id" gorm:"primaryKey;size:36"`
	UserID      string     `json:"userId" gorm:"index;size:36;uniqueIndex:idx_canvas_share_owner_project,priority:1"`
	ProjectID   string     `json:"projectId" gorm:"index;size:80;uniqueIndex:idx_canvas_share_owner_project,priority:2"`
	TokenHash   string     `json:"-" gorm:"uniqueIndex;size:64"`
	TokenCipher string     `json:"-" gorm:"type:text"`
	Enabled     bool       `json:"enabled" gorm:"index"`
	ExpiresAt   *time.Time `json:"expiresAt" gorm:"index"`
	CreatedAt   time.Time  `json:"createdAt"`
	UpdatedAt   time.Time  `json:"updatedAt"`
}

type PromptTemplate struct {
	ID         string    `json:"id" gorm:"primaryKey;size:36"`
	Operation  string    `json:"operation" gorm:"size:64;index;uniqueIndex:idx_prompt_template_operation_version,priority:1"`
	Name       string    `json:"name" gorm:"size:120"`
	Version    int       `json:"version" gorm:"uniqueIndex:idx_prompt_template_operation_version,priority:2"`
	Content    string    `json:"content" gorm:"type:text"`
	OutputType string    `json:"outputType" gorm:"size:24"`
	Enabled    bool      `json:"enabled" gorm:"index;index:idx_prompt_template_active,priority:2"`
	CreatedBy  string    `json:"createdBy" gorm:"index;size:36"`
	CreatedAt  time.Time `json:"createdAt"`
	UpdatedAt  time.Time `json:"updatedAt"`
}

// UserPromptCustomization 只保存用户的创作策略层，动态上下文和输出契约始终由服务端编译器注入。
type UserPromptCustomization struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	UserID         string    `json:"userId" gorm:"size:36;index;uniqueIndex:idx_user_prompt_operation,priority:1"`
	Operation      string    `json:"operation" gorm:"size:64;index;uniqueIndex:idx_user_prompt_operation,priority:2"`
	Mode           string    `json:"mode" gorm:"size:24"`
	Content        string    `json:"content" gorm:"type:text"`
	BaseTemplateID string    `json:"baseTemplateId" gorm:"size:36;index"`
	CreatedAt      time.Time `json:"createdAt"`
	UpdatedAt      time.Time `json:"updatedAt"`
}

type Announcement struct {
	ID              string             `json:"id" gorm:"primaryKey;size:36"`
	Title           string             `json:"title" gorm:"size:120"`
	Content         string             `json:"content" gorm:"type:text"`
	ImageResourceID string             `json:"imageResourceId,omitempty" gorm:"index;size:36"`
	ImageURL        string             `json:"imageUrl,omitempty" gorm:"-"`
	Level           AnnouncementLevel  `json:"level" gorm:"index;size:24"`
	Pinned          bool               `json:"pinned" gorm:"index"`
	Status          AnnouncementStatus `json:"status" gorm:"index;size:24;index:idx_announcements_status_published,priority:1"`
	CreatedBy       string             `json:"createdBy" gorm:"index;size:36"`
	PublishedAt     time.Time          `json:"publishedAt" gorm:"index:idx_announcements_status_published,priority:2"`
	ClosedAt        *time.Time         `json:"closedAt"`
	CreatedAt       time.Time          `json:"createdAt"`
	UpdatedAt       time.Time          `json:"updatedAt"`
}

type UserAnnouncementRead struct {
	ID             string    `json:"id" gorm:"primaryKey;size:36"`
	UserID         string    `json:"userId" gorm:"index;size:36;uniqueIndex:idx_user_announcement_read,priority:1"`
	AnnouncementID string    `json:"announcementId" gorm:"index;size:36;uniqueIndex:idx_user_announcement_read,priority:2"`
	ReadAt         time.Time `json:"readAt"`
}

// BannerTitleRun 是通知标题中一段连续文本的样式覆盖；零值字段表示沿用默认样式。
// 字重与字号用指针区分「未设置」和「显式设置为默认值」。
type BannerTitleRun struct {
	Text       string `json:"text"`
	FontSize   *int   `json:"fontSize,omitempty"`   // px，仅接受 10-20
	FontWeight *int   `json:"fontWeight,omitempty"` // 仅接受 400 / 500 / 600 / 700
	FontFamily string `json:"fontFamily,omitempty"` // "" | "sans" | "serif" | "mono"
	Color      string `json:"color,omitempty"`      // #RRGGBB
}

type BannerAnnouncement struct {
	ID    string `json:"id" gorm:"primaryKey;size:36"`
	Title string `json:"title" gorm:"size:120"` // 纯文本标题，由 TitleRuns 拼接得出，供列表展示和关键字检索
	// TitleRuns 是标题的样式分段，前端按段渲染；持久化在 title_runs 文本列，由仓储层显式编解码。
	TitleRuns     []BannerTitleRun `json:"titleRuns,omitempty" gorm:"-"`
	TitleRunsJSON string           `json:"-" gorm:"column:title_runs;type:text"`
	// NoticeType 决定通知条底色（"notice" | "activity" | "update" | "warning"），取值白名单见 app 层。
	NoticeType string     `json:"noticeType" gorm:"size:24"`
	Link       string     `json:"link" gorm:"size:500"`        // 点击跳转目标：http(s) 外链或 / 开头的站内路径；空表示不可点击
	Status     string     `json:"status" gorm:"size:24;index"` // "active" | "disabled"
	StartsAt   *time.Time `json:"startsAt,omitempty" gorm:"index"`
	EndsAt     *time.Time `json:"endsAt,omitempty" gorm:"index"`
	CreatedBy  string     `json:"createdBy" gorm:"size:36"`
	CreatedAt  time.Time  `json:"createdAt"`
	UpdatedAt  time.Time  `json:"updatedAt"`
}