package main

import (
	"database/sql"
	"fmt"
	"os"

	"go.alanpearce.eu/website/internal/builder"
	"go.alanpearce.eu/website/internal/config"
	"go.alanpearce.eu/website/internal/storage"
	"go.alanpearce.eu/website/internal/storage/files"
	"go.alanpearce.eu/website/internal/storage/sqlite"
	"go.alanpearce.eu/website/internal/vcs"
	"go.alanpearce.eu/x/log"

	"github.com/ardanlabs/conf/v3"
	"gitlab.com/tozd/go/errors"
)

const branch = "main"

type Options struct {
	*builder.Options
	Destination string `conf:"default:./public,short:d,flag:dest"`
	Compress    bool   `conf:"default:true"`
	Writer      string `conf:"default:files,help:Output type (files|sqlite)"`
}

func main() {
	options := &Options{}
	if help, err := conf.Parse("", options); err != nil {
		if errors.Is(err, conf.ErrHelpWanted) {
			fmt.Println(help)
			os.Exit(1)
		}
		panic("error parsing configuration: " + err.Error())
	}
	log := log.Configure(!options.Development)
	repo, _, err := vcs.CloneOrOpen(&vcs.Options{
		LocalPath: options.Source,
		RemoteURL: options.VCSRemoteURL,
		Branch:    branch,
	}, log.Named("vcs"))
	if err != nil {
		panic("could not open repository: " + err.Error())
	}
	options.Repo = repo

	var storage storage.Writer
	switch options.Writer {
	case "files":
		storage, err = files.NewWriter(options.Destination, log.Named("storage"), &files.Options{
			Compress: options.Compress,
		})
		if err != nil {
			panic("could not create storage: " + err.Error())
		}
	case "sqlite":
		var stat os.FileInfo
		stat, err = os.Stat(options.Destination)
		if err != nil && !errors.Is(err, os.ErrNotExist) {
			panic("could not stat destination: " + err.Error())
		}
		if stat != nil {
			if stat.IsDir() {
				panic("destination is a directory")
			}
			err = os.Remove(options.Destination)
			if err != nil {
				panic("could not remove destination: " + err.Error())
			}
		}

		var db *sql.DB
		db, err = sqlite.OpenDB(options.Destination)
		if err != nil {
			panic("could not open database: " + err.Error())
		}
		defer db.Close()
		storage, err = sqlite.NewWriter(db, log.Named("storage"), &sqlite.Options{
			Compress: options.Compress,
		})
		if err != nil {
			panic("could not create storage: " + err.Error())
		}
	default:
		panic("unknown storage type: " + options.Writer)
	}
	options.Storage = storage

	log.Debug("starting build process")
	cfg, err := config.GetConfig(options.Source, log)
	if err != nil {
		log.Error("could not read config", "error", err)
	}

	r, err := builder.BuildSite(options.Options, cfg, log)
	if err != nil {
		panic("could not build site: " + err.Error())
	}

	for _, w := range r.Hashes {
		fmt.Printf("\"'%s'\"\n", w)
	}
}