package main

import (
	"context"
	"database/sql"
	"time"

	"github.com/google/uuid"
	"github.com/uptrace/bun"
	"github.com/uptrace/bun/dialect/pgdialect"
	"github.com/uptrace/bun/driver/pgdriver"
)

type Role string

const (
	AdminRole Role = "admin"
	UserRole  Role = "user"
)

type User struct {
	bun.BaseModel `bun:"table:users"`

	UserID    uuid.UUID `bun:"type:uuid,pk,default:gen_random_uuid()"`
	FirstName string    `bun:"firstname,notnull"`
	LastName  string    `bun:"lastname,notnull"`
	Email     string    `bun:"email,unique,notnull"`
	Password  string    `bun:"password,notnull"`
	Phone     string    `bun:"phone,notnull"`
	Role      Role      `bun:"role,notnull,default:'user'"`
	CreatedAt time.Time `bun:"created_at,default:current_timestamp"`
	UpdatedAt time.Time `bun:"updated_at,default:current_timestamp"`
	Events    []Event   `bun:"m2m:events_to_users,join:User=Event"`
	Articles  []*Blog   `bun:"rel:has-many,join:user_id=blog_id"`
}

type Event struct {
	bun.BaseModel `bun:"table:events"`

	EventID       uuid.UUID `bun:"type:uuid,pk"`
	CreationDate  time.Time `bun:"creation_date,notnull,default:current_timestamp"`
	ScheduleStart time.Time `bun:"schedule_start,notnull"`
	ScheduleEnd   time.Time `bun:"schedule_end,notnull"`
	Status        string    `bun:"status,notnull"`
}

type EventToUser struct {
	bun.BaseModel `bun:"table:events_to_users"`

	EventID uuid.UUID `bun:"type:uuid,pk"`
	UserID  uuid.UUID `bun:"type:uuid,pk"`

	Event *Event `bun:"rel:belongs-to,join:event_id=event_id"`
	User  *User  `bun:"rel:belongs-to,join:user_id=user_id"`
}

type Blog struct {
	bun.BaseModel `bun:"table:blogs"`

	BlogID    uuid.UUID `bun:"type:uuid,pk"`
	Slug      string    `bun:"slug,unique,notnull"`
	Content   string    `bun:"content,notnull"`
	Label     string    `bun:"label"`
	AuthorID  uuid.UUID `bun:"author_id,notnull"`
	Published time.Time `bun:"published,default:current_timestamp"`
	Summary   string    `bun:"summary"`
	Image     string    `bun:"image"`
	Href      string    `bun:"href"`

	Author *User `bun:"rel:belongs-to,join:author_id=user_id"`
}

type WebsiteSettings struct {
	bun.BaseModel `bun:"table:website_settings"`

	ID               uuid.UUID `bun:"type:uuid,pk,default:gen_random_uuid()"`
	AutoAcceptDemand bool      `bun:"auto_accept_demand,default:false"`
}

func InitDatabase(dsn DSN) (*bun.DB, error) {
	sqldb := sql.OpenDB(pgdriver.NewConnector(pgdriver.WithDSN(dsn.ToString())))
	db := bun.NewDB(sqldb, pgdialect.New())

	db.RegisterModel((*EventToUser)(nil))
	_, err := db.NewCreateTable().Model((*User)(nil)).IfNotExists().Exec(context.Background())
	_, err = db.NewCreateTable().Model((*Event)(nil)).IfNotExists().Exec(context.Background())
	_, err = db.NewCreateTable().Model((*EventToUser)(nil)).IfNotExists().Exec(context.Background())
	_, err = db.NewCreateTable().Model((*Blog)(nil)).IfNotExists().Exec(context.Background())
	_, err = db.NewCreateTable().Model((*WebsiteSettings)(nil)).IfNotExists().Exec(context.Background())
	if err != nil {
		return nil, err
	}

	return db, nil
}