// Package config provides path and endpoint configuration for the exo system.
package config

import (
	"os"
	"path/filepath"
)

// Config holds all runtime configuration for exo.
type Config struct {
	// BasePath is the root directory for all exo data.
	BasePath string

	// DatabasePath is the path to the unified SQLite database.
	DatabasePath string

	// BlobStorePath is the root of the content-addressable blob store.
	BlobStorePath string

	// MinioEndpoint is the S3-compatible endpoint for remote blob backup.
	MinioEndpoint string

	// MinioBucket is the bucket name for blob backup.
	MinioBucket string

	// GRPCListenAddr is the address exod listens on for gRPC connections.
	GRPCListenAddr string
}

// DefaultBasePath returns $HOME/exo.
func DefaultBasePath() string {
	return filepath.Join(os.Getenv("HOME"), "exo")
}

// Default returns a Config with sensible defaults rooted at $HOME/exo.
func Default() Config {
	base := DefaultBasePath()
	return FromBasePath(base)
}

// FromBasePath returns a Config rooted at the given base path.
func FromBasePath(base string) Config {
	return Config{
		BasePath:       base,
		DatabasePath:   filepath.Join(base, "exo.db"),
		BlobStorePath:  filepath.Join(base, "blobs"),
		MinioEndpoint:  "",
		MinioBucket:    "exo-blobs",
		GRPCListenAddr: "localhost:9090",
	}
}