// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package speech

import (
	"bufio"
	"context"
	"fmt"
	"net"
	"strconv"
)

// ReadDefaults queries a fresh client, leaving the speaking client's settings
// alone. Unsupported or invalid fields stay nil so preferences can use sensible
// display values. The caller bounds the entire optional query with a deadline.
func ReadDefaults(ctx context.Context, socket string) (Settings, error) {
	var defaults Settings
	endpoint, err := resolveServerAddress(socket)
	if err != nil {
		return defaults, err
	}
	conn, err := (&net.Dialer{Timeout: connectTimeout}).DialContext(ctx, endpoint.network, endpoint.address)
	if err != nil {
		return defaults, err
	}
	defer conn.Close()
	finish, err := prepareIO(ctx, conn, ioTimeout)
	if err != nil {
		return defaults, err
	}
	defer finish()
	client := &Client{conn: conn, reader: bufio.NewReader(conn)}
	for _, field := range []struct {
		name   string
		target **int
	}{
		{"RATE", &defaults.Rate}, {"PITCH", &defaults.Pitch}, {"VOLUME", &defaults.Volume},
	} {
		if _, err := fmt.Fprintf(conn, "GET %s\r\n", field.name); err != nil {
			return defaults, err
		}
		response, err := client.readReply()
		if err != nil {
			return defaults, err
		}
		if response.code < 200 || response.code >= 300 || len(response.data) != 1 {
			continue
		}
		value, err := strconv.Atoi(response.data[0])
		if err == nil && value >= -100 && value <= 100 {
			*field.target = &value
		}
	}
	return defaults, nil
}