package config

import (
	"fmt"
	"os"
	"path/filepath"

	"github.com/BurntSushi/toml"
)

type Portainer struct {
	URL      string `toml:"url"`
	Token    string `toml:"token"`
	Endpoint string `toml:"endpoint"` // optional name override, defaults to auto-discover
}

type Config struct {
	Portainer    Portainer `toml:"portainer"`
	ServicesPath string    `toml:"services_path"` // optional, defaults to git root / services
}

func Load() (*Config, error) {
	path, err := configPath()
	if err != nil {
		return nil, err
	}

	var cfg Config
	if _, err := toml.DecodeFile(path, &cfg); err != nil {
		if os.IsNotExist(err) {
			return nil, fmt.Errorf("config file not found at %s — run `knecht init` to create one", path)
		}
		return nil, fmt.Errorf("parsing config: %w", err)
	}

	if cfg.Portainer.URL == "" {
		return nil, fmt.Errorf("portainer.url is required in %s", path)
	}
	if cfg.Portainer.Token == "" {
		return nil, fmt.Errorf("portainer.token is required in %s", path)
	}

	return &cfg, nil
}

func Path() (string, error) {
	return configPath()
}

func configPath() (string, error) {
	home, err := os.UserHomeDir()
	if err != nil {
		return "", err
	}
	return filepath.Join(home, ".config", "knecht", "config.toml"), nil
}