package main

import (
	"fmt"
	"os"

	yaml "gopkg.in/yaml.v3"
)

const (
	defaultPort         = 7099
	defaultInstanceName = "BBJ"
	defaultHost         = "127.0.0.1"
	defaultDBPath       = "db.sqlite3"
)

func parseConfig(configPath string) (*Config, error) {
	cfgBytes, err := os.ReadFile(configPath)
	if err != nil {
		return nil, fmt.Errorf("failed to read config file: %w", err)
	}

	var cfg Config

	if err := yaml.Unmarshal(cfgBytes, &cfg); err != nil {
		return nil, fmt.Errorf("failed to parse config: %w", err)
	}

	if cfg.Port == 0 {
		cfg.Port = defaultPort
	}

	if cfg.InstanceName == "" {
		cfg.InstanceName = defaultInstanceName

	}

	if cfg.Host == "" {
		cfg.Host = defaultHost
	}

	if cfg.DBPath == "" {
		cfg.DBPath = defaultDBPath
	}

	return &cfg, nil
}