package view

import (
	"strconv"

	"github.com/valyala/fasthttp"

	"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
	}
)

func getPagination(ctx *fasthttp.RequestCtx) *repository.Pagination {
	var (
		size    int
		page    int
		sizeStr = string(ctx.FormValue("size"))
		pageStr = string(ctx.FormValue("page"))
	)

	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
	}

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

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

func (self *MediaView) Index(ctx *fasthttp.RequestCtx) error {
	p := getPagination(ctx)
	token := ext.GetTokenFromCtx(ctx)

	userPath, err := self.userRepository.GetPathFromUserID(ctx, token.UserID)
	if err != nil {
		return err
	}

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

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

	templates.WritePageTemplate(ctx, page)

	if err != nil {
		return err
	}
	return nil
}

func (self *MediaView) GetImage(ctx *fasthttp.RequestCtx) error {
	pathHash := string(ctx.FormValue("path_hash"))

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

	ctx.Response.Header.SetContentType(media.MIMEType)
	fasthttp.ServeFileUncompressed(ctx, media.Path)
	return nil
}

func (self *MediaView) GetThumbnail(ctx *fasthttp.RequestCtx) error {
	pathHash := string(ctx.FormValue("path_hash"))

	path, err := self.mediaRepository.GetThumbnailPath(ctx, pathHash)
	if err != nil {
		ctx.Redirect("/media/image?path_hash="+pathHash, 307)
		// nolint: nilerr
		return nil
	}

	ctx.Request.Header.SetContentType("image/jpeg")
	fasthttp.ServeFileUncompressed(ctx, path)
	return nil
}

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

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