package identity

import (
	"context"
	"fmt"

	"github.com/jackc/pgx/v5/pgxpool"
)

type SeedResult struct {
	Username          string
	MerchantSourceKey string
	MerchantName      string
}

func SeedDemo(ctx context.Context, pool *pgxpool.Pool, username, password string) (SeedResult, error) {
	hash, err := HashPassword(password)
	if err != nil {
		return SeedResult{}, err
	}
	var result SeedResult
	var merchantID int64
	err = pool.QueryRow(ctx, `SELECT m.id,m.source_key,m.display_name
		FROM merchants m JOIN payment_sessions ps ON ps.merchant_id=m.id
		GROUP BY m.id ORDER BY (count(DISTINCT ps.terminal_id)>1) DESC,count(*) DESC,m.source_key LIMIT 1`).Scan(
		&merchantID, &result.MerchantSourceKey, &result.MerchantName,
	)
	if err != nil {
		return SeedResult{}, fmt.Errorf("selecting demo merchant: %w", err)
	}
	_, err = pool.Exec(ctx, `INSERT INTO merchant_users(merchant_id,username,password_hash)
		VALUES ($1,$2,$3) ON CONFLICT (username) DO UPDATE
		SET merchant_id=excluded.merchant_id,password_hash=excluded.password_hash,is_active=true`, merchantID, username, hash)
	if err != nil {
		return SeedResult{}, fmt.Errorf("seeding demo merchant user: %w", err)
	}
	result.Username = username
	return result, nil
}