package config

import (
	"log"
	"path/filepath"

	"github.com/adrg/xdg"
)

type ServerConfig struct {
	Address     string
	TemplateDir string
	StaticDir   string
}

type Config struct {
	Database string

	Server ServerConfig

	AllowRoot bool
}

var config = Config{
	Database: "feedizer@localhost:5432/feedizer?sslmode=require&search_path=public",
	Server: ServerConfig{
		Address:     ":3000",
		TemplateDir: "",
		StaticDir:   "",
	},
}

const appName = "feedizer"

func SearchPaths() []string {
	numXdgDirs := len(xdg.ConfigDirs)
	paths := make([]string, numXdgDirs+2)
	for i, path := range xdg.ConfigDirs {
		paths[numXdgDirs-i-1] = filepath.Join(path, appName, appName+".yaml")
	}
	paths[numXdgDirs] = filepath.Join(xdg.ConfigHome, appName, appName+".yaml")
	paths[numXdgDirs+1] = appName + ".yaml"

	return paths
}

func Load() (*Config, error) {
	paths := SearchPaths()
	used, err := ReadFiles(paths, &config)
	if err != nil {
		return nil, err
	}
	log.Println("config: search paths are:", paths)
	log.Println("config: using config files:", used)

	envAvailable, envUsed := ReadEnv(&config, appName)
	log.Println("config: usable env vars:", envAvailable)
	log.Println("config: using env vars:", envUsed)

	return &config, nil
}