package models

import (
	"time"
)

// CelestiaSession represents a field record ("现场记录") session
type CelestiaSession struct {
	ID             string          `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
	UserID         string          `gorm:"type:uuid;not null;index;uniqueIndex:idx_session_user_client" json:"userId"`
	ClientID       *string         `gorm:"size:100;uniqueIndex:idx_session_user_client" json:"clientId,omitempty"`
	Title          string          `gorm:"size:200;not null" json:"title"`
	StartTime      time.Time       `gorm:"not null" json:"startTime"`
	EndTime        *time.Time      `json:"endTime,omitempty"`
	DurationMs     int64           `gorm:"default:0" json:"durationMs"`
	LocalAudioPath string          `gorm:"size:500" json:"localAudioPath,omitempty"`
	IsSynced       bool            `gorm:"default:true" json:"isSynced"`
	PhotoCount     int             `gorm:"default:0" json:"photoCount"`
	NoteCount      int             `gorm:"default:0" json:"noteCount"`
	Events         []TimelineEvent `gorm:"foreignKey:SessionID;constraint:OnDelete:CASCADE" json:"events"`
	Assets         []MediaAsset    `gorm:"foreignKey:SessionID;constraint:OnDelete:CASCADE" json:"assets"`
	Revision       int64           `gorm:"default:1" json:"revision"`
	DeletedAt      *time.Time      `gorm:"index" json:"deletedAt,omitempty"`
	CreatedAt      time.Time       `gorm:"autoCreateTime" json:"createdAt"`
	UpdatedAt      time.Time       `gorm:"autoUpdateTime" json:"updatedAt"`
}

// SessionSyncIndexItem is the lightweight first phase of synchronization.
// Events and asset descriptors are intentionally omitted; clients fetch the
// full session only when UpdatedAt or Revision differs from local state.
type SessionSyncIndexItem struct {
	ID         string     `json:"id"`
	ClientID   *string    `json:"clientId,omitempty"`
	Title      string     `json:"title"`
	StartTime  time.Time  `json:"startTime"`
	EndTime    *time.Time `json:"endTime,omitempty"`
	DurationMs int64      `json:"durationMs"`
	PhotoCount int        `json:"photoCount"`
	NoteCount  int        `json:"noteCount"`
	Revision   int64      `json:"revision"`
	DeletedAt  *time.Time `json:"deletedAt,omitempty"`
	UpdatedAt  time.Time  `json:"updatedAt"`
}

func (session CelestiaSession) SyncIndexItem() SessionSyncIndexItem {
	return SessionSyncIndexItem{
		ID:         session.ID,
		ClientID:   session.ClientID,
		Title:      session.Title,
		StartTime:  session.StartTime,
		EndTime:    session.EndTime,
		DurationMs: session.DurationMs,
		PhotoCount: session.PhotoCount,
		NoteCount:  session.NoteCount,
		Revision:   session.Revision,
		DeletedAt:  session.DeletedAt,
		UpdatedAt:  session.UpdatedAt,
	}
}

// TimelineEvent represents an event (NOTE, PHOTO, MARKER, VOICE) within a session
type TimelineEvent struct {
	ID                 string    `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
	SessionID          string    `gorm:"type:uuid;not null;index;uniqueIndex:idx_event_session_client" json:"sessionId"`
	ClientID           *string   `gorm:"size:100;uniqueIndex:idx_event_session_client" json:"clientId,omitempty"`
	RelativeTimeMs     int64     `gorm:"not null" json:"relativeTimeMs"`
	EventType          string    `gorm:"size:20;not null" json:"eventType"` // PHOTO, NOTE, MARKER, VOICE
	TextContent        string    `gorm:"type:text" json:"textContent,omitempty"`
	LocalFilePath      string    `gorm:"size:500" json:"localFilePath,omitempty"`
	VoiceStartOffsetMs *int64    `json:"voiceStartOffsetMs,omitempty"`
	VoiceEndOffsetMs   *int64    `json:"voiceEndOffsetMs,omitempty"`
	LocationName       string    `gorm:"size:200" json:"locationName,omitempty"`
	LocationAddress    string    `gorm:"size:500" json:"locationAddress,omitempty"`
	Latitude           *float64  `json:"latitude,omitempty"`
	Longitude          *float64  `json:"longitude,omitempty"`
	CreatedAt          time.Time `gorm:"autoCreateTime" json:"createdAt"`
}

// MediaAsset is an uploaded audio or photo belonging to a session. StoragePath
// is never serialized because it is an implementation detail of the server.
type MediaAsset struct {
	ID          string    `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
	SessionID   string    `gorm:"type:uuid;not null;index;uniqueIndex:idx_asset_session_client" json:"sessionId"`
	UserID      string    `gorm:"type:uuid;not null;index" json:"userId"`
	ClientID    string    `gorm:"size:120;not null;uniqueIndex:idx_asset_session_client" json:"clientId"`
	Kind        string    `gorm:"size:20;not null" json:"kind"`
	FileName    string    `gorm:"size:255;not null" json:"fileName"`
	MIMEType    string    `gorm:"size:120" json:"mimeType"`
	SizeBytes   int64     `gorm:"not null" json:"sizeBytes"`
	SHA256      string    `gorm:"size:64;not null;index" json:"sha256"`
	StoragePath string    `gorm:"size:1000;not null" json:"-"`
	CreatedAt   time.Time `gorm:"autoCreateTime" json:"createdAt"`
}

type CreateSessionRequest struct {
	ClientID              string                 `json:"clientId" binding:"required"`
	Title                 string                 `json:"title" binding:"required"`
	StartTime             time.Time              `json:"startTime" binding:"required"`
	EndTime               *time.Time             `json:"endTime"`
	DurationMs            int64                  `json:"durationMs"`
	LocalAudioPath        string                 `json:"localAudioPath"`
	Events                []CreateEventSubSchema `json:"events"`
	BaseRevision          *int64                 `json:"baseRevision"`
	DeletedEventClientIds []string               `json:"deletedEventClientIds"`
}

type CreateEventSubSchema struct {
	ClientID           string   `json:"clientId" binding:"required"`
	RelativeTimeMs     int64    `json:"relativeTimeMs"`
	EventType          string   `json:"eventType" binding:"required"`
	TextContent        string   `json:"textContent"`
	LocalFilePath      string   `json:"localFilePath"`
	VoiceStartOffsetMs *int64   `json:"voiceStartOffsetMs"`
	VoiceEndOffsetMs   *int64   `json:"voiceEndOffsetMs"`
	LocationName       string   `json:"locationName"`
	LocationAddress    string   `json:"locationAddress"`
	Latitude           *float64 `json:"latitude"`
	Longitude          *float64 `json:"longitude"`
}

type CreateEventRequest struct {
	ClientID           string   `json:"clientId" binding:"required"`
	RelativeTimeMs     int64    `json:"relativeTimeMs"`
	EventType          string   `json:"eventType" binding:"required"`
	TextContent        string   `json:"textContent"`
	LocalFilePath      string   `json:"localFilePath"`
	VoiceStartOffsetMs *int64   `json:"voiceStartOffsetMs"`
	VoiceEndOffsetMs   *int64   `json:"voiceEndOffsetMs"`
	LocationName       string   `json:"locationName"`
	LocationAddress    string   `json:"locationAddress"`
	Latitude           *float64 `json:"latitude"`
	Longitude          *float64 `json:"longitude"`
}