package cache

import (
	"context"
	"fmt"
	"net/url"
	"strconv"
	"time"

	"forge.cadoles.com/arcad/edge/pkg/storage"
	"forge.cadoles.com/arcad/edge/pkg/storage/driver"
	"github.com/allegro/bigcache/v3"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/logger"
)

func init() {
	driver.RegisterBlobStoreFactory("cache", blobStoreFactory)
}

func blobStoreFactory(dsn *url.URL) (storage.BlobStore, error) {
	query := dsn.Query()

	rawDriver := query.Get("driver")
	if rawDriver == "" {
		return nil, errors.New("missing required url parameter 'driver'")
	}

	query.Del("driver")

	blobStoreOptionFuncs := make([]OptionFunc, 0)

	rawCacheTTL := query.Get("cacheTTL")
	if rawCacheTTL != "" {
		query.Del("cacheTTL")

		ttl, err := time.ParseDuration(rawCacheTTL)
		if err != nil {
			return nil, errors.Wrap(err, "could not parse url parameter 'cacheTTL'")
		}

		blobStoreOptionFuncs = append(blobStoreOptionFuncs, WithCacheTTL(ttl))
	}

	rawCacheShards := query.Get("blobCacheShards")
	if rawCacheShards != "" {
		query.Del("blobCacheShards")

		cacheShards, err := strconv.ParseInt(rawCacheShards, 10, 32)
		if err != nil {
			return nil, errors.Wrap(err, "could not parse url parameter 'blobCacheShards'")
		}

		blobStoreOptionFuncs = append(blobStoreOptionFuncs, WithBlobCacheShards(int(cacheShards)))
	}

	rawBlobCacheMaxMemorySize := query.Get("blobCacheMaxMemorySize")
	if rawBlobCacheMaxMemorySize != "" {
		query.Del("blobCacheMaxMemorySize")

		blobCacheMaxMemorySize, err := strconv.ParseInt(rawBlobCacheMaxMemorySize, 10, 32)
		if err != nil {
			return nil, errors.Wrap(err, "could not parse url parameter 'blobCacheMaxMemorySize'")
		}

		blobStoreOptionFuncs = append(blobStoreOptionFuncs, WithBlobCacheMaxMemorySize(int(blobCacheMaxMemorySize)))
	}

	rawBlobBucketCacheSize := query.Get("blobBucketCacheSize")
	if rawBlobBucketCacheSize != "" {
		query.Del("blobBucketCacheSize")

		blobBucketCacheSize, err := strconv.ParseInt(rawBlobBucketCacheSize, 10, 32)
		if err != nil {
			return nil, errors.Wrap(err, "could not parse url parameter 'blobBucketCacheSize'")
		}

		blobStoreOptionFuncs = append(blobStoreOptionFuncs, WithBucketCacheSize(int(blobBucketCacheSize)))
	}

	rawBlobInfoCacheSize := query.Get("blobInfoCacheSize")
	if rawBlobInfoCacheSize != "" {
		query.Del("blobInfoCacheSize")

		blobInfoCacheSize, err := strconv.ParseInt(rawBlobInfoCacheSize, 10, 32)
		if err != nil {
			return nil, errors.Wrap(err, "could not parse url parameter 'blobInfoCacheSize'")
		}

		blobStoreOptionFuncs = append(blobStoreOptionFuncs, WithBlobInfoCacheSize(int(blobInfoCacheSize)))
	}

	url := &url.URL{
		Scheme:   rawDriver,
		Host:     dsn.Host,
		Path:     dsn.Path,
		RawQuery: query.Encode(),
	}

	backend, err := driver.NewBlobStore(url.String())
	if err != nil {
		return nil, errors.WithStack(err)
	}

	store, err := NewBlobStore(backend, blobStoreOptionFuncs...)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	return store, nil
}

type cacheLogger struct{}

func (l *cacheLogger) Printf(format string, v ...interface{}) {
	logger.Debug(context.Background(), fmt.Sprintf(format, v...))
}

var _ bigcache.Logger = &cacheLogger{}