package rate

import (
	"context"
	"fmt"
	"os/exec"
	"strconv"
	"strings"
	"time"
)

func query(amount float64, base, quote string) (string, error) {
	ctx, cancel := context.WithTimeout(context.Background(), 190*time.Second)
	defer cancel()
	cmd := exec.CommandContext(ctx, "python3", "scripts/rate_query.py", strconv.FormatFloat(amount, 'f', -1, 64), base, quote)
	out, err := cmd.Output()
	if ctx.Err() == context.DeadlineExceeded {
		return "", fmt.Errorf("汇率服务超时，请稍后重试")
	}
	if err != nil {
		return "", fmt.Errorf("汇率查询失败")
	}
	text := strings.TrimSpace(string(out))
	if text == "" {
		return "", fmt.Errorf("未获取到汇率")
	}
	return text, nil
}