package database

import (
	"context"
	"database/sql"
	"embed"
	"fmt"
	"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"
	log2 "log"
	"os"
	"time"
)

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

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

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

func (p *postgresqlConnection) Connect(_ context.Context, endpoint string, username string, password string, database string, port int, ssl string, timezone string) error {
	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%d sslmode=%s TimeZone=%s", endpoint, username, password, database, port, ssl, timezone)
	var err error

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

	log.Infof("OtterSpace: migration compleate")

	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: postgres connection established")

	return nil
}

func (p *postgresqlConnection) AddUserWithRelationToSource(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceDomain string, userID string, username string) error {
	return postgres.CreateUserNodeWithSourceRelation(ctx, p.db, anthroveUserID, sourceDomain, userID, userID)
}

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

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

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

func (p *postgresqlConnection) LinkPostWithSource(ctx context.Context, anthrovePostID models.AnthrovePostID, sourceDomain string, anthrovePostRelationship *models.PostReference) error {
	return postgres.EstablishAnthrovePostToSourceLink(ctx, p.db, anthrovePostID, sourceDomain, anthrovePostRelationship)
}

func (p *postgresqlConnection) LinkUserWithPost(ctx context.Context, anthroveUser *models.User, anthrovePost *models.Post) error {
	return postgres.EstablishUserToPostLink(ctx, p.db, anthroveUser.ID, anthrovePost.ID)
}

func (p *postgresqlConnection) CheckUserPostLink(ctx context.Context, anthroveUserID models.AnthroveUserID, sourcePostID string, sourceUrl string) (bool, error) {
	return postgres.CheckUserToPostLink(ctx, p.db, anthroveUserID, models.AnthrovePostID(sourcePostID))
}

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

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

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

func (p *postgresqlConnection) GetUserFavoriteCount(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.GetUserSourceLink(ctx, p.db, anthroveUserID)
}

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

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

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

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

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

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

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

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

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

	db, err := sql.Open(dialect, connectionString)
	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
}