package main

import (
	"database/sql"
	"fmt"
	"os"
	"time"
)

const bcryptHashFile = "loadtest_bcrypt.txt"

func SeedUsers(db *sql.DB) error {
	hash, err := os.ReadFile(bcryptHashFile)
	if err != nil {
		return fmt.Errorf("read bcrypt hash file %s: %w (run Task 10 Step 1 first)", bcryptHashFile, err)
	}
	ts := time.Now().UnixMilli()
	tx, err := db.Begin()
	if err != nil {
		return err
	}
	defer tx.Rollback()

	stmt, err := tx.Prepare(`
        INSERT INTO users (id, mobile, password_hash, is_active, created_at, updated_at)
        VALUES ($1, $2, $3, true, $4, $4)
        ON CONFLICT (id) DO NOTHING
    `)
	if err != nil {
		return err
	}
	defer stmt.Close()

	for uid := LoadtestUserMin; uid <= LoadtestUserMax; uid++ {
		mobile := fmt.Sprintf("199%08d", uid-LoadtestUserMin+1)
		if _, err := stmt.Exec(uid, mobile, string(hash), ts); err != nil {
			return fmt.Errorf("insert user %d: %w", uid, err)
		}
	}
	return tx.Commit()
}