package view

import (
	"net/http"
	"strconv"
	"strings"

	"git.sr.ht/~gabrielgio/img/pkg/database/repository"
	"git.sr.ht/~gabrielgio/img/pkg/ext"
	"git.sr.ht/~gabrielgio/img/templates"
)

type (
	MediaView struct {
		mediaRepository    repository.MediaRepository
		userRepository     repository.UserRepository
		settingsRepository repository.SettingsRepository
	}
)

func getPagination(r *http.Request) *repository.Pagination {
	var (
		size       int
		page       int
		albumID    *uint
		sizeStr    = r.FormValue("size")
		pageStr    = r.FormValue("page")
		albumIDStr = r.FormValue("albumId")
	)

	if sizeStr == "" {
		size = 100
	} else if s, err := strconv.Atoi(sizeStr); err != nil {
		size = 100
	} else {
		size = s
	}

	if pageStr == "" {
		page = 0
	} else if p, err := strconv.Atoi(pageStr); err != nil {
		page = 0
	} else {
		page = p
	}

	if albumIDStr == "" {
		albumID = nil
	} else if p, err := strconv.Atoi(albumIDStr); err == nil {
		id := uint(p)
		albumID = &id
	}

	return &repository.Pagination{
		Page:    page,
		Size:    size,
		AlbumID: albumID,
	}
}

func NewMediaView(
	mediaRepository repository.MediaRepository,
	userRepository repository.UserRepository,
	settingsRepository repository.SettingsRepository,
) *MediaView {
	return &MediaView{
		mediaRepository:    mediaRepository,
		userRepository:     userRepository,
		settingsRepository: settingsRepository,
	}
}

func (self *MediaView) Index(w http.ResponseWriter, r *http.Request) error {
	p := getPagination(r)
	user := ext.GetUserFromCtx(r)

	userPath, err := self.userRepository.GetPathFromUserID(r.Context(), user.ID)
	if err != nil {
		return err
	}

	p.Path = userPath
	medias, err := self.mediaRepository.List(r.Context(), p)
	if err != nil {
		return err
	}

	settings, err := self.settingsRepository.Load(r.Context())
	if err != nil {
		return err
	}

	page := &templates.MediaPage{
		Medias: medias,
		Next: &repository.Pagination{
			Size: p.Size,
			Page: p.Page + 1,
		},
		Settings: settings,
	}

	templates.WritePageTemplate(w, page, user.IsAdmin)

	return nil
}

func (self *MediaView) Detail(w http.ResponseWriter, r *http.Request) error {
	user := ext.GetUserFromCtx(r)

	userPath, err := self.userRepository.GetPathFromUserID(r.Context(), user.ID)
	if err != nil {
		return err
	}

	pathHash := r.FormValue("path_hash")

	media, err := self.mediaRepository.Get(r.Context(), pathHash)
	if err != nil {
		return err
	}

	if !strings.Contains(media.Path, userPath) {
		ext.NotFound(w)
		return nil
	}

	settings, err := self.settingsRepository.Load(r.Context())
	if err != nil {
		return err
	}

	page := &templates.DetailPage{
		Settings: settings,
		Media:    media,
	}

	templates.WritePageTemplate(w, page, user.IsAdmin)

	return nil
}

func (self *MediaView) GetImage(w http.ResponseWriter, r *http.Request) error {
	pathHash := r.FormValue("path_hash")

	media, err := self.mediaRepository.Get(r.Context(), pathHash)
	if err != nil {
		return err
	}

	w.Header().Set("Content-Type", media.MIMEType)
	http.ServeFile(w, r, media.Path)
	return nil
}

func (self *MediaView) GetThumbnail(w http.ResponseWriter, r *http.Request) error {
	pathHash := r.FormValue("path_hash")

	path, err := self.mediaRepository.GetThumbnailPath(r.Context(), pathHash)
	if err != nil {
		http.Redirect(w, r, "/media/image?path_hash="+pathHash, http.StatusTemporaryRedirect)
		// nolint: nilerr
		return nil
	}

	w.Header().Set("Content-Type", "image/jpeg")
	http.ServeFile(w, r, path)
	return nil
}

func (self *MediaView) SetMyselfIn(r *ext.Router) {
	r.GET("/media", self.Index)
	r.POST("/media", self.Index)

	r.GET("/detail", self.Detail)
	r.POST("/detail", self.Detail)

	r.GET("/media/image", self.GetImage)
	r.GET("/media/thumbnail", self.GetThumbnail)
}