package repository

import (
	"database/sql"
	"fmt"
	"strconv"
	"time"

	"devone.aplikasi.web.id/gitea/mario/go-ohif-proxy/internal/api/models"
	"devone.aplikasi.web.id/gitea/mario/go-ohif-proxy/internal/database"
)

// DBShortLink represents a shortlink from the database
type DBShortLink struct {
	ShortlinkID             int       `db:"ShortlinkID"`
	ShortlinKCode           string    `db:"ShortlinKCode"`
	Shortlink_PatientID     string    `db:"Shortlink_PatientID"`
	Shortlink_Study_IUID    string    `db:"Shortlink_Study_IUID"`
	ShortlinkHashDoB        string    `db:"ShortlinkHashDoB"`
	ShortlinkExpiredAt      time.Time `db:"ShortlinkExpiredAt"`
	ShortlinkIsRevoked      bool      `db:"ShortlinkIsRevoked"`
	ShortlinkRemainingTries int       `db:"ShortlinkRemainingTries"`
	ShortlinkCreatedAt      time.Time `db:"ShortlinkCreatedAt"`
	ShortlinkCreate_UserID  int       `db:"ShortlinkCreate_UserID"`
}

// ShortLinkRepository handles database operations related to shortlinks
type ShortLinkRepository struct {
	*Repository
}

// NewShortLinkRepository creates a new shortlink repository
func NewShortLinkRepository() *ShortLinkRepository {
	return &ShortLinkRepository{
		Repository: NewRepository(),
	}
}

// ToShortLink converts a DBShortLink to a ShortLink model
func (s *DBShortLink) ToShortLink() *models.ShortLink {
	return &models.ShortLink{
		ID:             fmt.Sprintf("%d", s.ShortlinkID),
		Token:          s.ShortlinKCode,
		PatientID:      s.Shortlink_PatientID,
		StudyUID:       s.Shortlink_Study_IUID,
		HashedDOB:      s.ShortlinkHashDoB,
		ExpiresAt:      s.ShortlinkExpiredAt.Format(time.RFC3339),
		IsRevoked:      s.ShortlinkIsRevoked,
		RemainingTries: s.ShortlinkRemainingTries,
		CreatedAt:      s.ShortlinkCreatedAt.Format(time.RFC3339),
		CreatedByID:    fmt.Sprintf("%d", s.ShortlinkCreate_UserID),
	}
}

// GetShortLinkByToken retrieves a shortlink by token
func (r *ShortLinkRepository) GetShortLinkByToken(token string) (*models.ShortLink, error) {
	var dbShortLink DBShortLink

	query := `SELECT * FROM shortlink WHERE ShortlinKCode = ?`
	err := database.DB.Get(&dbShortLink, query, token)

	if err != nil {
		if err == sql.ErrNoRows {
			return nil, nil
		}
		return nil, fmt.Errorf("database error getting shortlink: %w", err)
	}

	return dbShortLink.ToShortLink(), nil
}

// CreateShortLink stores a new shortlink in the database
func (r *ShortLinkRepository) CreateShortLink(shortLink *models.ShortLink) error {
	query := `INSERT INTO shortlink (
		ShortlinKCode, 
		Shortlink_PatientID, 
		Shortlink_Study_IUID, 
		ShortlinkHashDoB, 
		ShortlinkExpiredAt, 
		ShortlinkIsRevoked, 
		ShortlinkRemainingTries, 
		ShortlinkCreatedAt, 
		ShortlinkCreate_UserID) 
	VALUES (?, ?, ?, ?, ?, ?, ?, NOW(), ?)`

	createdByID, err := strconv.Atoi(shortLink.CreatedByID)
	if err != nil {
		return fmt.Errorf("invalid created by ID: %w", err)
	}

	expiresAt, err := time.Parse(time.RFC3339, shortLink.ExpiresAt)
	if err != nil {
		return fmt.Errorf("invalid expiration date: %w", err)
	}

	_, err = database.DB.Exec(
		query,
		shortLink.Token,
		shortLink.PatientID,
		shortLink.StudyUID,
		shortLink.HashedDOB,
		expiresAt,
		shortLink.IsRevoked,
		shortLink.RemainingTries,
		createdByID,
	)

	if err != nil {
		return fmt.Errorf("database error creating shortlink: %w", err)
	}

	return nil
}

// UpdateShortLink updates an existing shortlink in the database
func (r *ShortLinkRepository) UpdateShortLink(shortLink *models.ShortLink) error {
	query := `UPDATE shortlink SET 
		ShortlinkIsRevoked = ?, 
		ShortlinkRemainingTries = ?,
		ShortlinkExpiredAt = ?
	WHERE ShortlinKCode = ?`

	expiresAt, err := time.Parse(time.RFC3339, shortLink.ExpiresAt)
	if err != nil {
		return fmt.Errorf("invalid expiration date: %w", err)
	}

	_, err = database.DB.Exec(
		query,
		shortLink.IsRevoked,
		shortLink.RemainingTries,
		expiresAt,
		shortLink.Token,
	)

	if err != nil {
		return fmt.Errorf("database error updating shortlink: %w", err)
	}

	return nil
}