package main

import (
	"Scanyonero/document"
	"Scanyonero/ftpserver"
	"Scanyonero/unit"
	"log"
	"net/http"
	"path/filepath"
	"regexp"
)

func main() {
	log.Printf("Starting Scanyonero.")

	// Start FTP server.
	ftpServer, err := ftpserver.NewFTPServer("", "", "127.0.0.1:21")
	if err != nil {
		log.Panicf("Failed to start FTP server: %v.", err)
	}
	defer ftpServer.Stop()

	// Web and WS server.
	server := NewServer()

	// Add test documents.
	server.Documents.Append(LoadExampleQueueEntries()...)
	server.Documents.Append(LoadExampleQueueEntries()...)
	server.Documents.Append(LoadExampleQueueEntries()...)
	server.Documents.Append(LoadExampleQueueEntries()...)

	go func() {
		ingestor := document.Ingestor{
			DefaultDPI: unit.PerInch(150),
			Rules: []document.IngestorRule{{
				Match: struct {
					Name    *regexp.Regexp
					XPixels *int
					YPixels *int
				}{
					Name: regexp.MustCompile(`^.*\.pdf$`),
				},
				Action: struct {
					MediumWidth  *unit.Millimeter
					MediumHeight *unit.Millimeter
					ScanOffsetX  *unit.Millimeter
					ScanOffsetY  *unit.Millimeter
				}{
					MediumWidth: &([]unit.Millimeter{100}[0]),
				},
			}},
		}

		for file := range ftpServer.FileChan() {
			docPages, err := ingestor.Ingest(file)
			if err != nil {
				log.Printf("Failed to ingest document file %q: %v.", file.Name, err)
				continue
			}

			server.Documents.Lock()

			var entries []QueueEntry
			if len(server.Documents.Documents) > 0 {
				entries = append(entries, QueueEntry{ID: NewQueueEntryID(), QueueEntryData: QueueEntryDataSeparator{}})
			}
			for _, page := range docPages {
				entries = append(entries, QueueEntry{
					ID:             NewQueueEntryID(),
					Name:           filepath.Base(file.Name),
					QueueEntryData: QueueEntryDataPage{Page: &page},
				})
			}

			server.Documents.Append(entries...)
			server.Documents.Unlock()
		}
	}()

	http.Handle("/", server)

	log.Println("Server is running on port 8080.")
	if err := http.ListenAndServe(":8080", nil); err != nil {
		log.Panicf("ListenAndServe failed: %v.", err)
	}
}