package model

import (
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

// Base gives every persisted model a PostgreSQL uuid primary key.
// GORM's naming strategy maps Go fields to snake_case columns.
type Base struct {
	ID        string    `gorm:"type:uuid;primaryKey" json:"id"`
	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

func (b *Base) BeforeCreate(_ *gorm.DB) error {
	if b.ID == "" {
		b.ID = uuid.NewString()
	}
	return nil
}

type File struct {
	Base
	Bucket      string `gorm:"size:128;not null" json:"bucket"`
	ObjectKey   string `gorm:"size:512;uniqueIndex;not null" json:"object_key"`
	MD5         string `gorm:"column:md5;size:32;uniqueIndex;not null" json:"md5"`
	URL         string `gorm:"size:1024;not null" json:"url"`
	Name        string `gorm:"size:255;not null" json:"name"`
	ContentType string `gorm:"size:128;not null" json:"content_type"`
	Size        int64  `gorm:"not null" json:"size"`
}

type User struct {
	Base
	OpenID       string  `gorm:"size:128;uniqueIndex;not null" json:"-"`
	Nickname     string  `gorm:"size:64;not null" json:"nickname"`
	AvatarFileID *string `gorm:"type:uuid;index" json:"avatar_file_id"`
	Disabled     bool    `gorm:"not null;default:false" json:"disabled"`
}

type Admin struct {
	Base
	Username     string `gorm:"size:64;uniqueIndex;not null" json:"username"`
	PasswordHash string `gorm:"size:255;not null" json:"-"`
}

// RefreshSession stores only a hash of the rotating refresh credential.
type RefreshSession struct {
	Base
	ActorID   string    `gorm:"type:uuid;index;not null" json:"-"`
	Role      string    `gorm:"size:16;index;not null" json:"-"`
	TokenHash string    `gorm:"size:64;uniqueIndex;not null" json:"-"`
	ExpiresAt time.Time `gorm:"index;not null" json:"-"`
	Revoked   bool      `gorm:"not null;default:false" json:"-"`
}

type Breed struct {
	Base
	LifeSpan              string            `gorm:"size:128" json:"life_span"`
	Exercise              string            `gorm:"size:255" json:"exercise"`
	Grooming              string            `gorm:"size:255" json:"grooming"`
	EditorialLocked       bool              `gorm:"not null;default:false" json:"editorial_locked"`
	FieldSources          map[string]string `gorm:"serializer:json;type:jsonb" json:"field_sources"`
	References            []BreedReference  `gorm:"foreignKey:BreedID" json:"references,omitempty"`
	Origin                string            `gorm:"size:128" json:"origin"`
	BreedGroup            string            `gorm:"size:255" json:"breed_group"`
	FCINumber             string            `gorm:"size:16" json:"fci_number"`
	Height                string            `gorm:"size:128" json:"height"`
	Weight                string            `gorm:"size:128" json:"weight"`
	Summary               string            `gorm:"type:text" json:"summary"`
	Temperament           string            `gorm:"size:255" json:"temperament"`
	Traits                string            `gorm:"type:text" json:"traits"`
	CareNotes             string            `gorm:"type:text" json:"care_notes"`
	EncyclopediaUpdatedAt string            `gorm:"size:10" json:"encyclopedia_updated_at"`
	Name                  string            `gorm:"size:128;uniqueIndex;not null" json:"name"`
	EnglishName           string            `gorm:"size:128" json:"english_name"`
	Aliases               string            `gorm:"size:512" json:"aliases"`
	Pinyin                string            `gorm:"size:1024;index;not null" json:"pinyin"`
	PinyinInitials        string            `gorm:"size:128" json:"pinyin_initials"`
	Initial               string            `gorm:"size:1;index;not null" json:"initial"`
	Enabled               bool              `gorm:"not null;default:true" json:"enabled"`
	Source                string            `gorm:"size:128" json:"source"`
	SourceKey             *string           `gorm:"size:128;uniqueIndex" json:"source_key"`
	SourceURL             string            `gorm:"size:512" json:"source_url"`
}

// Facts contain short structured facts, never copied articles or remote images.
type BreedReference struct {
	Base
	BreedID     string            `gorm:"type:uuid;uniqueIndex:idx_breed_provider;not null" json:"breed_id"`
	Provider    string            `gorm:"size:32;uniqueIndex:idx_breed_provider;not null" json:"provider"`
	ExternalID  string            `gorm:"size:128;not null" json:"external_id"`
	URL         string            `gorm:"size:512;not null" json:"url"`
	RetrievedAt string            `gorm:"size:10;not null" json:"retrieved_at"`
	Facts       map[string]string `gorm:"serializer:json;type:jsonb;not null" json:"facts"`
}

type Pet struct {
	Base
	UserID       string     `gorm:"type:uuid;index;not null" json:"user_id"`
	Name         string     `gorm:"size:64;not null" json:"name"`
	Species      string     `gorm:"size:16;not null;default:dog" json:"species"`
	Breed        string     `gorm:"size:128" json:"breed"`
	BreedID      *string    `gorm:"type:uuid;index" json:"breed_id"`
	Gender       string     `gorm:"size:16" json:"gender"`
	BirthDate    *time.Time `gorm:"type:date" json:"birth_date"`
	WeightKg     float64    `gorm:"type:numeric(6,2)" json:"weight_kg"`
	AvatarFileID *string    `gorm:"type:uuid;index" json:"avatar_file_id"`
	Coat         string     `gorm:"size:64" json:"coat"`
	Allergies    string     `gorm:"size:255" json:"allergies"`
	CareNotes    string     `gorm:"size:1000" json:"care_notes"`
	Archived     bool       `gorm:"not null;default:false" json:"archived"`
}

type CareTask struct {
	Base
	UserID          string `gorm:"type:uuid;index;not null" json:"user_id"`
	PetID           string `gorm:"type:uuid;index;not null" json:"pet_id"`
	Title           string `gorm:"size:128;not null" json:"title"`
	Category        string `gorm:"size:32;not null" json:"category"`
	TimeOfDay       string `gorm:"size:5;not null" json:"time_of_day"`
	RepeatRule      string `gorm:"size:16;not null;default:daily" json:"repeat_rule"`
	ReminderEnabled bool   `gorm:"not null;default:false" json:"reminder_enabled"`
}

type TaskCompletion struct {
	Base
	TaskID      string    `gorm:"type:uuid;uniqueIndex:idx_task_date;not null" json:"task_id"`
	UserID      string    `gorm:"type:uuid;index;not null" json:"user_id"`
	Date        time.Time `gorm:"type:date;uniqueIndex:idx_task_date;not null" json:"date"`
	CompletedAt time.Time `gorm:"not null" json:"completed_at"`
}

type Walk struct {
	Base
	UserID           string     `gorm:"type:uuid;index;not null" json:"user_id"`
	Status           string     `gorm:"size:16;index;not null" json:"status"`
	StartedAt        time.Time  `gorm:"not null" json:"started_at"`
	SegmentStartedAt time.Time  `gorm:"not null" json:"segment_started_at"`
	PausedAt         *time.Time `json:"paused_at"`
	PausedSeconds    int        `gorm:"not null;default:0" json:"paused_seconds"`
	EndedAt          *time.Time `json:"ended_at"`
	DurationSeconds  int        `gorm:"not null;default:0" json:"duration_seconds"`
	DistanceMeters   float64    `gorm:"type:numeric(12,2);not null;default:0" json:"distance_meters"`
	ShareEnabled     bool       `gorm:"not null;default:false" json:"share_enabled"`
	ShareToken       string     `gorm:"type:uuid;uniqueIndex" json:"-"`
	ShareExpiresAt   *time.Time `json:"share_expires_at"`
}

type WalkPet struct {
	Base
	WalkID string `gorm:"type:uuid;uniqueIndex:idx_walk_pet;not null" json:"walk_id"`
	PetID  string `gorm:"type:uuid;uniqueIndex:idx_walk_pet;index;not null" json:"pet_id"`
}

type WalkPoint struct {
	Base
	WalkID     string    `gorm:"type:uuid;index;not null" json:"walk_id"`
	Latitude   float64   `gorm:"type:numeric(10,7);not null" json:"latitude"`
	Longitude  float64   `gorm:"type:numeric(10,7);not null" json:"longitude"`
	RecordedAt time.Time `gorm:"index;not null" json:"recorded_at"`
}

type Meetup struct {
	Base
	HostUserID  string    `gorm:"type:uuid;index;not null" json:"host_user_id"`
	Title       string    `gorm:"size:128;not null" json:"title"`
	Description string    `gorm:"size:1000" json:"description"`
	PlaceName   string    `gorm:"size:255;not null" json:"place_name"`
	Latitude    float64   `gorm:"type:numeric(10,7)" json:"latitude"`
	Longitude   float64   `gorm:"type:numeric(10,7)" json:"longitude"`
	StartsAt    time.Time `gorm:"index;not null" json:"starts_at"`
	MaxPeople   int       `gorm:"not null;default:8" json:"max_people"`
	Status      string    `gorm:"size:16;index;not null;default:open" json:"status"`
	CoverFileID *string   `gorm:"type:uuid;index" json:"cover_file_id"`
}

type MeetupParticipant struct {
	Base
	MeetupID string `gorm:"type:uuid;uniqueIndex:idx_meetup_user;not null" json:"meetup_id"`
	UserID   string `gorm:"type:uuid;uniqueIndex:idx_meetup_user;index;not null" json:"user_id"`
}

type MeetupPet struct {
	Base
	ParticipantID string `gorm:"type:uuid;uniqueIndex:idx_participant_pet;not null" json:"participant_id"`
	PetID         string `gorm:"type:uuid;uniqueIndex:idx_participant_pet;index;not null" json:"pet_id"`
}

func All() []any {
	return []any{
		&File{}, &User{}, &Admin{}, &RefreshSession{}, &Breed{}, &BreedReference{}, &Pet{}, &CareTask{}, &TaskCompletion{},
		&Walk{}, &WalkPet{}, &WalkPoint{}, &Meetup{}, &MeetupParticipant{}, &MeetupPet{},
	}
}