package instagram

import (
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"errors"
	"io"
	"io/ioutil"
	"log"
	"os"

	"github.com/disintegration/imaging"

	"git.1750studios.com/AniNite/SocialDragon/config"
)

type InstagramListResponse struct {
	Tag struct {
		Media struct {
			Nodes []struct {
				ID         string `json:"id"`
				Caption    string `json:"caption"`
				DisplaySrc string `json:"display_src"`
				IsVideo    bool   `json:"is_video"`
				Owner      struct {
					ID string `json:"id"`
				} `json:"owner"`
				ThumbnailSrc string `json:"thumbnail_src"`
				Code         string `json:"code"`
				Date         int    `json:"date"`
			} `json:"nodes"`
			PageInfo struct {
				EndCursor       string `json:"end_cursor"`
				HasNextPage     bool   `json:"has_next_page"`
				StartCursor     string `json:"start_cursor"`
				HasPreviousPage bool   `json:"has_previous_page"`
			} `json:"page_info"`
			Count int `json:"count"`
		} `json:"media"`
	} `json:"tag"`
}

type InstagramPostResponse struct {
	Media struct {
		Owner struct {
			ProfilePicURL     string `json:"profile_pic_url"`
			HasBlockedViewer  bool   `json:"has_blocked_viewer"`
			Username          string `json:"username"`
			FullName          string `json:"full_name"`
			RequestedByViewer bool   `json:"requested_by_viewer"`
			FollowedByViewer  bool   `json:"followed_by_viewer"`
			IsPrivate         bool   `json:"is_private"`
			ID                string `json:"id"`
			BlockedByViewer   bool   `json:"blocked_by_viewer"`
			IsUnpublished     bool   `json:"is_unpublished"`
		} `json:"owner"`
		CaptionIsEdited  bool   `json:"caption_is_edited"`
		VideoURL         string `json:"video_url"`
		DisplaySrc       string `json:"display_src"`
		CommentsDisabled bool   `json:"comments_disabled"`
		Code             string `json:"code"`
		IsAd             bool   `json:"is_ad"`
		IsVideo          bool   `json:"is_video"`
		Caption          string `json:"caption"`
		ID               string `json:"id"`
		Date             int    `json:"date"`
		VideoViews       int    `json:"video_views"`
	} `json:"media"`
}

func LoadList() (*InstagramListResponse, error) {
	var listResponse InstagramListResponse
	res, err := GetHTTPResource("https://www.instagram.com/explore/tags/" + config.C.Instagram.Tag + "/?__a=1")
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return nil, err
	}
	jerr := json.Unmarshal(body, &listResponse)
	if jerr != nil {
		return nil, jerr
	}
	return &listResponse, nil
}

func LoadPost(code string) (*InstagramPostResponse, error) {
	var postResponse InstagramPostResponse
	res, err := GetHTTPResource("https://www.instagram.com/p/" + code + "/?__a=1")
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		return nil, err
	}
	jerr := json.Unmarshal(body, &postResponse)
	if jerr != nil {
		return nil, jerr
	}
	return &postResponse, nil
}

func ImageNameGenerator(seed string) (string, string) {
	seedBytes := []byte(seed)
	sha256Bytes := sha256.Sum256(seedBytes)
	hash := hex.EncodeToString(sha256Bytes[:])
	folders := config.C.ContentDirectory + "/" + hash[0:2] + "/" + hash[0:4] + "/"
	urls := config.C.ContentWebDirectory + "/" + hash[0:2] + "/" + hash[0:4] + "/"
	if err := os.MkdirAll(folders, 0775); err != nil {
		log.Fatalf("FAT Could not create ContentDirectory, error: %+v", err)
	}
	finalPath := folders + hash
	finalUrl := urls + hash
	return finalPath, finalUrl
}

func DownloadMedia(data io.Reader, path string, video bool) (string, error) {
	if video {
		ext := ".mp4"
		blob, err := ioutil.ReadAll(data)
		if err != nil {
			return "", err
		}
		if len(blob) == 0 {
			return "", errors.New("Empty response")
		}
		err = ioutil.WriteFile(path+ext, blob, 0644)
		if err != nil {
			return "", err
		}
		return ext, nil
	} else {
		ext := ".jpg"
		image, err := imaging.Decode(data)
		if err != nil {
			return "", err
		}
		err = imaging.Save(image, path+ext)
		if err != nil {
			return "", err
		}
		return ext, nil
	}
}