package database

import (
	"context"
	"embed"
	"fmt"
	log2 "log"
	"os"
	"time"

	"git.dragse.it/anthrove/otter-space-sdk/internal/postgres"
	"git.dragse.it/anthrove/otter-space-sdk/pkg/models"
	_ "github.com/lib/pq"
	migrate "github.com/rubenv/sql-migrate"
	log "github.com/sirupsen/logrus"
	gormPostgres "gorm.io/driver/postgres"
	"gorm.io/gorm"
	logger2 "gorm.io/gorm/logger"
)

//go:embed migrations/*.sql
var embedMigrations embed.FS

type postgresqlConnection struct {
	db    *gorm.DB
	debug bool
}

func NewPostgresqlConnection() OtterSpace {
	return &postgresqlConnection{
		db: nil,
	}
}

func (p *postgresqlConnection) Connect(_ context.Context, config models.DatabaseConfig) error {
	var localSSL string
	if config.SSL {
		localSSL = "require"
	} else {
		localSSL = "disable"
	}

	p.debug = config.Debug

	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%d sslmode=%s TimeZone=%s", config.Endpoint, config.Username, config.Password, config.Database, config.Port, localSSL, config.Timezone)
	var err error

	dbLogger := logger2.New(log2.New(os.Stdout, "\r\n", log2.LstdFlags), logger2.Config{
		SlowThreshold:             200 * time.Millisecond,
		LogLevel:                  logger2.Warn,
		IgnoreRecordNotFoundError: true,
		Colorful:                  true,
	})

	db, err := gorm.Open(gormPostgres.Open(dsn), &gorm.Config{
		Logger: dbLogger,
	})
	p.db = db
	if err != nil {
		return err
	}

	log.Infof("OtterSpace: database connection established")

	err = p.migrateDatabase(db)
	if err != nil {
		return err
	}

	log.Infof("OtterSpace: migration compleate")

	return nil
}

func (p *postgresqlConnection) CreateUserWithRelationToSource(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceID models.AnthroveSourceID, accountId string, accountUsername string) error {
	return postgres.CreateUserWithRelationToSource(ctx, p.db, anthroveUserID, sourceID, accountId, accountUsername)
}

func (p *postgresqlConnection) CreateSource(ctx context.Context, anthroveSource *models.Source) error {
	return postgres.CreateSource(ctx, p.db, anthroveSource)
}

func (p *postgresqlConnection) CreatePost(ctx context.Context, anthrovePost *models.Post) error {
	return postgres.CreatePost(ctx, p.db, anthrovePost)
}

func (p *postgresqlConnection) CreateTagAndReferenceToPost(ctx context.Context, anthrovePostID models.AnthrovePostID, anthroveTag *models.Tag) error {
	return postgres.CreateTagAndReferenceToPost(ctx, p.db, anthrovePostID, anthroveTag)
}

func (p *postgresqlConnection) CreateReferenceBetweenPostAndSource(ctx context.Context, anthrovePostID models.AnthrovePostID, sourceDomain models.AnthroveSourceDomain) error {
	return postgres.CreateReferenceBetweenPostAndSource(ctx, p.db, anthrovePostID, sourceDomain)
}

func (p *postgresqlConnection) CreateReferenceBetweenUserAndPost(ctx context.Context, anthroveUserID models.AnthroveUserID, anthrovePostID models.AnthrovePostID) error {
	return postgres.CreateReferenceBetweenUserAndPost(ctx, p.db, anthroveUserID, anthrovePostID)
}

func (p *postgresqlConnection) CheckReferenceBetweenUserAndPost(ctx context.Context, anthroveUserID models.AnthroveUserID, anthrovePostID models.AnthrovePostID) (bool, error) {
	return postgres.CheckReferenceBetweenUserAndPost(ctx, p.db, anthroveUserID, anthrovePostID)
}

func (p *postgresqlConnection) GetPostByAnthroveID(ctx context.Context, anthrovePostID models.AnthrovePostID) (*models.Post, error) {
	return postgres.GetPostByAnthroveID(ctx, p.db, anthrovePostID)
}

func (p *postgresqlConnection) GetPostByURL(ctx context.Context, sourceUrl string) (*models.Post, error) {
	return postgres.GetPostByURL(ctx, p.db, sourceUrl)
}

func (p *postgresqlConnection) GetPostBySourceID(ctx context.Context, sourceID models.AnthroveSourceID) (*models.Post, error) {
	return postgres.GetPostBySourceID(ctx, p.db, sourceID)
}

func (p *postgresqlConnection) GetUserFavoritesCount(ctx context.Context, anthroveUserID models.AnthroveUserID) (int64, error) {
	return postgres.GetUserFavoritesCount(ctx, p.db, anthroveUserID)
}

func (p *postgresqlConnection) GetUserSourceLinks(ctx context.Context, anthroveUserID models.AnthroveUserID) (map[string]models.UserSource, error) {
	return postgres.GetUserSourceLinks(ctx, p.db, anthroveUserID)
}

func (p *postgresqlConnection) GetUserSourceBySourceID(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceID models.AnthroveSourceID) (map[string]models.UserSource, error) {
	return postgres.GetUserSourceBySourceID(ctx, p.db, anthroveUserID, sourceID)
}

func (p *postgresqlConnection) GetAllAnthroveUserIDs(ctx context.Context) ([]models.AnthroveUserID, error) {
	return postgres.GetAllAnthroveUserIDs(ctx, p.db)
}

func (p *postgresqlConnection) GetUserFavoriteWithPagination(ctx context.Context, anthroveUserID models.AnthroveUserID, skip int, limit int) (*models.FavoriteList, error) {
	return postgres.GetUserFavoriteWithPagination(ctx, p.db, anthroveUserID, skip, limit)
}

func (p *postgresqlConnection) GetUserTagWitRelationToFavedPosts(ctx context.Context, anthroveUserID models.AnthroveUserID) ([]models.TagsWithFrequency, error) {
	return postgres.GetUserTagWitRelationToFavedPosts(ctx, p.db, anthroveUserID)
}

func (p *postgresqlConnection) GetAllTags(ctx context.Context) ([]models.Tag, error) {
	return postgres.GetTags(ctx, p.db)
}

func (p *postgresqlConnection) GetAllSources(ctx context.Context) ([]models.Source, error) {
	return postgres.GetAllSource(ctx, p.db)
}

func (p *postgresqlConnection) GetSourceByDomain(ctx context.Context, sourceDomain models.AnthroveSourceDomain) (*models.Source, error) {
	return postgres.GetSourceByDomain(ctx, p.db, sourceDomain)
}

func (p *postgresqlConnection) migrateDatabase(dbPool *gorm.DB) error {
	dialect := "postgres"
	migrations := &migrate.EmbedFileSystemMigrationSource{FileSystem: embedMigrations, Root: "migrations"}

	db, err := dbPool.DB()
	if err != nil {
		return fmt.Errorf("postgres migration: %v", err)
	}

	n, err := migrate.Exec(db, dialect, migrations, migrate.Up)
	if err != nil {
		return fmt.Errorf("postgres migration: %v", err)
	}

	if p.debug {
		if n != 0 {
			log.Infof("postgres migration: applied %d migrations!", n)

		} else {
			log.Info("postgres migration: nothing to migrate")

		}
	}

	return nil
}