// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package controller

import (
	"context"
	"path/filepath"
	"time"

	"github.com/redis/go-redis/v9"

	"github.com/openimsdk/open-im-server/v3/pkg/common/db/cache"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/s3"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/s3/cont"
	"github.com/openimsdk/open-im-server/v3/pkg/common/db/table/relation"
)

type S3Database interface {
	PartLimit() *s3.PartLimit
	PartSize(ctx context.Context, size int64) (int64, error)
	AuthSign(ctx context.Context, uploadID string, partNumbers []int) (*s3.AuthSignResult, error)
	InitiateMultipartUpload(ctx context.Context, hash string, size int64, expire time.Duration, maxParts int) (*cont.InitiateUploadResult, error)
	CompleteMultipartUpload(ctx context.Context, uploadID string, parts []string) (*cont.UploadResult, error)
	AccessURL(ctx context.Context, name string, expire time.Duration, opt *s3.AccessURLOption) (time.Time, string, error)
	SetObject(ctx context.Context, info *relation.ObjectModel) error
}

func NewS3Database(rdb redis.UniversalClient, s3 s3.Interface, obj relation.ObjectInfoModelInterface) S3Database {
	return &s3Database{
		s3:    cont.New(cache.NewS3Cache(rdb, s3), s3),
		cache: cache.NewObjectCacheRedis(rdb, obj),
		db:    obj,
	}
}

type s3Database struct {
	s3    *cont.Controller
	cache cache.ObjectCache
	db    relation.ObjectInfoModelInterface
}

func (s *s3Database) PartSize(ctx context.Context, size int64) (int64, error) {
	return s.s3.PartSize(ctx, size)
}

func (s *s3Database) PartLimit() *s3.PartLimit {
	return s.s3.PartLimit()
}

func (s *s3Database) AuthSign(ctx context.Context, uploadID string, partNumbers []int) (*s3.AuthSignResult, error) {
	return s.s3.AuthSign(ctx, uploadID, partNumbers)
}

func (s *s3Database) InitiateMultipartUpload(ctx context.Context, hash string, size int64, expire time.Duration, maxParts int) (*cont.InitiateUploadResult, error) {
	return s.s3.InitiateUpload(ctx, hash, size, expire, maxParts)
}

func (s *s3Database) CompleteMultipartUpload(ctx context.Context, uploadID string, parts []string) (*cont.UploadResult, error) {
	return s.s3.CompleteUpload(ctx, uploadID, parts)
}

func (s *s3Database) SetObject(ctx context.Context, info *relation.ObjectModel) error {
	info.Engine = s.s3.Engine()
	if err := s.db.SetObject(ctx, info); err != nil {
		return err
	}
	return s.cache.DelObjectName(info.Engine, info.Name).ExecDel(ctx)
}

func (s *s3Database) AccessURL(ctx context.Context, name string, expire time.Duration, opt *s3.AccessURLOption) (time.Time, string, error) {
	obj, err := s.cache.GetName(ctx, s.s3.Engine(), name)
	if err != nil {
		return time.Time{}, "", err
	}
	if opt == nil {
		opt = &s3.AccessURLOption{}
	}
	if opt.ContentType == "" {
		opt.ContentType = obj.ContentType
	}
	if opt.Filename == "" {
		opt.Filename = filepath.Base(obj.Name)
	}
	expireTime := time.Now().Add(expire)
	rawURL, err := s.s3.AccessURL(ctx, obj.Key, expire, opt)
	if err != nil {
		return time.Time{}, "", err
	}
	return expireTime, rawURL, nil
}