package main

import (
	"database/sql"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"net/url"
	"os"
	"path"
	"strings"

	_ "github.com/mattn/go-sqlite3"
)

var Error *log.Logger

func init() {
	log.SetFlags(log.Lmicroseconds | log.Lshortfile)
	logFile, err := os.Create("main.log")
	if err != nil {
		log.Printf("Error creating log file: %v", err)
		os.Exit(1)
	}
	logger := io.MultiWriter(os.Stdout, logFile)
	log.SetOutput(logger)

	Error = log.New(io.MultiWriter(logFile, os.Stderr, os.Stdout),
		fmt.Sprintf("%sERROR:%s ", "\033[0;101m", "\033[0m"),
		log.Lmicroseconds|log.Lshortfile)
}

const projectsFile = `C:\Users\Administrator\Seafile\VSCode\Code\User\globalStorage\state.vscdb`

var scanFolders []string = []string{
	`C:\Users\Administrator\Seafile\Projects-Clion\ClionProjects`,
	`C:\Users\Administrator\Seafile\Projects-Elixir\ElixirProjects`,
	`C:\Users\Administrator\Seafile\Projects-Go\GoProjects`,
	`C:\Users\Administrator\Seafile\Projects-Idea\IdeaProjects`,
	`C:\Users\Administrator\Seafile\Projects-Other\Projects`,
	`C:\Users\Administrator\Seafile\Projects-Pycharm\PycharmProjects`,
	`C:\Users\Administrator\Seafile\Projects-Rider\RiderProjects`,
	`C:\Users\Administrator\Seafile\Projects-Webstorm\WebstormProjects`,
}

func main() {
	for idx, folder := range scanFolders {
		scanFolders[idx] = path.Clean(folder)
	}

	config, err := ReadDBConfig()
	if err != nil {
		Error.Fatalf("Error reading database config: %v", err)
		return
	}
	log.Printf("Loaded %d entries", len(config.Entries))
	cleanConfig := CleanConfig(config)
	log.Printf("%d after cleaning config", len(cleanConfig))

	cleaned := 0
	for ipath := range cleanConfig {
		file, err := os.Open(ipath)
		if err != nil {
			if os.IsNotExist(err) {
				log.Printf("Discarding non existing directory %s", ipath)
				delete(cleanConfig, ipath)
				cleaned++
			} else {
				// Maybe we fail to open it for some other reason...
				// Could be it still does exist
				Error.Printf("Error opening file %s: %v", ipath, err)
				continue
			}
			continue
		}
		file.Close()

		// escaped := url.QueryEscape(relevantPath)
		// escaped = strings.ReplaceAll(escaped, "%2F", "/")
		// escaped = strings.ReplaceAll(escaped, "+", "%20")
		// escaped = "file:///" + escaped
		// log.Printf("%#v", escaped)
	}
	log.Printf("Cleaned %d invalid entries, %d valid entries remain", cleaned, len(cleanConfig))

	added := 0
	for _, folder := range scanFolders {
		files, err := os.ReadDir(folder)
		if err != nil {
			log.Printf("Error reading folder %s: %v", folder, err)
			continue
		}

		for _, fileEntry := range files {
			if !fileEntry.IsDir() {
				continue
			}
			newEntry := Entry{
				FolderURI: path.Clean(path.Join(folder, fileEntry.Name())),
			}
			_, exists := cleanConfig[newEntry.FolderURI]
			if exists {
				log.Printf("Folder %s already exists in config", newEntry.FolderURI)
				continue
			}
			cleanConfig[newEntry.FolderURI] = &newEntry
			added++
		}
	}
	log.Printf("Added %d new entries from scan folders, now %d total", added, len(cleanConfig))
}

func ReadDBConfig() (Config, error) {
	var res = Config{}
	conn, err := sql.Open("sqlite3", projectsFile)
	if err != nil {
		return res, err
	}

	row := conn.QueryRow(`SELECT * FROM ItemTable WHERE key = 'history.recentlyOpenedPathsList'`)

	var key string
	var value string
	err = row.Scan(&key, &value)
	if err != nil {
		return res, err
	}
	conn.Close()

	err = json.NewDecoder(strings.NewReader(value)).Decode(&res)
	if err != nil {
		return res, fmt.Errorf("error decoding JSON: %v", err)
	}
	return res, nil
}
func CleanConfig(config Config) map[string]*Entry {
	var res = make(map[string]*Entry)
	for _, entry := range config.Entries {
		relevantPath := entry.FileURI
		if relevantPath == "" {
			relevantPath = entry.FolderURI
		}
		relevantPath = strings.TrimPrefix(relevantPath, "file://")
		relevantPath = strings.TrimPrefix(relevantPath, "/")
		decoded, err := url.QueryUnescape(relevantPath)
		if err != nil {
			Error.Printf("Error decoding URI %s: %v", relevantPath, err)
			continue
		}
		relevantPath = path.Clean(decoded)
		res[relevantPath] = &entry
	}
	return res
}

func WriteDBConfig(config Config) error {
	conn, err := sql.Open("sqlite3", projectsFile)
	if err != nil {
		return err
	}
	log.Printf("%#v", conn)
	return nil
}