package main

import (
	"errors"
	"fmt"
	"os"
	"time"

	"github.com/pelletier/go-toml/v2"
)

type Config struct {
	// System Identification

	Name  string // The name to refer to this BBS
	Sysop string // The name to identify the System Operator (SYSOP)

	// Paths

	DataPath    string // Path to users.db, and various *.toml config files
	MessagePath string // Path to store *.db (for all message bases: local, NETWORKs)
	FilePath    string // Path to store files (for both NETWORK-received, and local-received)
	LogPath     string // Path to store *.log files (for lunarhub.log, and more)
}

func DefaultConfig() *Config {
	cfg := &Config{
		Name:  "Lunar Hub",
		Sysop: "Sysop",

		DataPath:    "data",
		MessagePath: "msgs",
		FilePath:    "files",
		LogPath:     "logs",
	}
	cfg.Save()
	return cfg
}

func LoadConfig() *Config {
	in, err := os.ReadFile("lunar_hub.toml")
	if err != nil {
		if errors.Is(err, os.ErrNotExist) {
			return DefaultConfig()
		} else {
			panic(fmt.Errorf("load config >> %v", err))
		}
	}
	var data map[string]any = map[string]any{}
	err = toml.Unmarshal(in, &data)
	if err != nil {
		return DefaultConfig()
	}
	paths := data["Paths"].(map[string]any)
	return &Config{
		Name:        data["Name"].(string),
		Sysop:       data["Sysop"].(string),
		DataPath:    paths["Data"].(string),
		MessagePath: paths["Messages"].(string),
		FilePath:    paths["Files"].(string),
		LogPath:     paths["Logs"].(string),
	}
}

func (cfg *Config) Save() error {
	f, err := os.Create("lunar_hub.toml")
	if err != nil {
		return err
	}
	now := time.Now().Truncate(time.Second).String()
	f.WriteString("# Lunar Hub - Main Config\n")
	f.WriteString("# Generated: " + now + "\n\n")
	f.WriteString("Name = \"" + cfg.Name + "\"\n")
	f.WriteString("Sysop = \"" + cfg.Sysop + "\"\n\n")
	f.WriteString("[Paths]\n")
	f.WriteString("\"Data\" = \"" + cfg.DataPath + "\"\n")
	f.WriteString("\"Messages\" = \"" + cfg.MessagePath + "\"\n")
	f.WriteString("\"Files\" = \"" + cfg.FilePath + "\"\n")
	f.WriteString("\"Logs\" = \"" + cfg.LogPath + "\"\n")
	return f.Close()
}