package config

import (
	"log/slog"
	"os"
	"path/filepath"
	"time"

	"github.com/BurntSushi/toml"
)

var (
	Port                         uint32        = 8080
	MaxDirectMsgCache            uint32        = 32
	MaxHubChannelMsgCache        uint32        = 16
	FileStorageBucketName        string        = "communicator"
	MaxRequestBytes              uint32        = 4 << 10
	MaxRequestWithFileBytes      uint32        = 1 << 30
	MaxRequestWithAvatarBytes    uint32        = 1 << 20
	MaxRequestWithProfileBgBytes uint32        = 4 << 20
	FileProcessingPartBytes      uint64        = 12 << 20
	FileProcessingThreads        uint          = 3
	FileDownloadLinkTtl          time.Duration = 24 * time.Hour
)

type configFile struct {
	Port                         uint32        `toml:"port"`
	MaxDirectMsgCache            uint32        `toml:"max_direct_messages_cache"`
	MaxHubChannelMsgCache        uint32        `toml:"max_hub_channel_msg_cache"`
	MaxRequestBytes              uint32        `toml:"max_request_bytes"`
	MaxRequestWithFileBytes      uint32        `toml:"max_request_with_file_bytes"`
	MaxRequestWithAvatarBytes    uint32        `toml:"max_request_with_avatar_bytes"`
	MaxRequestWithProfileBgBytes uint32        `toml:"max_request_with_profile_bg_bytes"`
	FileProcessingPartBytes      uint64        `toml:"file_processing_part_bytes"`
	FileProcessingThreads        uint          `toml:"file_processing_threads"`
	FileDownloadLinkTtl          time.Duration `toml:"file_download_link_ttl"`
}

func LoadConfFile() {
	path, err := os.Executable()
	if err != nil {
		panic(err)
	}

	var cfg configFile
	if _, err := toml.DecodeFile("config.toml", &cfg); err != nil {
		slog.Warn("Failed to load config.toml. Default values will be used", "path", filepath.Dir(path)+"/config.toml")
		return
	}

	Port = cfg.Port
	MaxDirectMsgCache = cfg.MaxDirectMsgCache
	MaxHubChannelMsgCache = cfg.MaxHubChannelMsgCache
	FileStorageBucketName = cfg.FileStorageBucketName
	MaxRequestBytes = cfg.MaxRequestBytes
	MaxRequestWithFileBytes = cfg.MaxRequestWithFileBytes
	MaxRequestWithAvatarBytes = cfg.MaxRequestWithAvatarBytes
	MaxRequestWithProfileBgBytes = cfg.MaxRequestWithProfileBgBytes
	FileProcessingPartBytes = cfg.FileProcessingPartBytes
	FileProcessingThreads = cfg.FileProcessingThreads
	FileDownloadLinkTtl = cfg.FileDownloadLinkTtl
}