package main

import (
	"fmt"
	"os"

	"gopkg.in/yaml.v3"
)

type Config struct {
	DestBase   string            `yaml:"dest_base"`
	Categories map[string]string `yaml:"categories"`
}

func loadConfig(path string) (*Config, error) {
	data, err := os.ReadFile(path)
	if err != nil {
		return nil, fmt.Errorf("reading config file %q: %w", path, err)
	}

	var cfg Config
	if err := yaml.Unmarshal(data, &cfg); err != nil {
		return nil, fmt.Errorf("parsing config file %q: %w", path, err)
	}

	if cfg.DestBase == "" {
		return nil, fmt.Errorf("dest_base is required in config")
	}
	if len(cfg.Categories) == 0 {
		return nil, fmt.Errorf("at least one category mapping is required in config")
	}

	return &cfg, nil
}