package repository

import (
	"context"
	"database/sql"
	"fmt"

	"erp-mvp/core-service/internal/models"
	"github.com/google/uuid"
)

type UserRepository interface {
	Create(ctx context.Context, user *models.User, password string) error
	GetByEmail(ctx context.Context, email string) (*models.User, error)
	GetByID(ctx context.Context, id uuid.UUID) (*models.User, error)
}

type userRepository struct {
	db *sql.DB
}

func NewUserRepository(db *sql.DB) UserRepository {
	return &userRepository{db: db}
}

func (r *userRepository) Create(ctx context.Context, user *models.User, password string) error {
	query := `
		INSERT INTO users (id, organization_id, email, password_hash, role, created_at)
		VALUES ($1, $2, $3, $4, $5, $6)
	`
	
	_, err := r.db.ExecContext(ctx, query, 
		user.ID, 
		user.OrganizationID, 
		user.Email, 
		password, 
		user.Role, 
		user.CreatedAt,
	)
	if err != nil {
		return fmt.Errorf("failed to create user: %w", err)
	}
	
	return nil
}

func (r *userRepository) GetByEmail(ctx context.Context, email string) (*models.User, error) {
	query := `
		SELECT id, organization_id, email, password_hash, role, created_at
		FROM users
		WHERE email = $1
	`
	
	user := &models.User{}
	err := r.db.QueryRowContext(ctx, query, email).Scan(
		&user.ID,
		&user.OrganizationID,
		&user.Email,
		&user.PasswordHash,
		&user.Role,
		&user.CreatedAt,
	)
	
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, fmt.Errorf("user not found")
		}
		return nil, fmt.Errorf("failed to get user: %w", err)
	}
	
	return user, nil
}

func (r *userRepository) GetByID(ctx context.Context, id uuid.UUID) (*models.User, error) {
	query := `
		SELECT id, organization_id, email, password_hash, role, created_at
		FROM users
		WHERE id = $1
	`
	
	user := &models.User{}
	err := r.db.QueryRowContext(ctx, query, id).Scan(
		&user.ID,
		&user.OrganizationID,
		&user.Email,
		&user.PasswordHash,
		&user.Role,
		&user.CreatedAt,
	)
	
	if err != nil {
		if err == sql.ErrNoRows {
			return nil, fmt.Errorf("user not found")
		}
		return nil, fmt.Errorf("failed to get user: %w", err)
	}
	
	return user, nil
}