package main

import (
	"html/template"
	"strings"

	lib "git.makerforce.io/photos/photos/pkg/bucket"
	"git.makerforce.io/photos/photos/web"
)

var funcs = template.FuncMap{
	"ar":                  func(p Photo) float64 { return float64(p.Size.Width) / float64(p.Size.Height) },
	"mul":                 func(a, b float64) float64 { return a * b },
	"bucketmetadatatitle": func(t lib.BucketMetadataTitle) string { return strings.TrimSpace(string(t)) },
	"photometadatatitle":  func(t lib.PhotoMetadataTitle) string { return strings.TrimSpace(string(t)) },
	"photo":               photo,
	"preview":             preview,
}

type IndexTemplateData struct {
	Assets  string
	Control string

	Bucket lib.Bucket
	Title  lib.BucketMetadataTitle
	Photos []Photo

	Development bool
}

type Photo struct {
	lib.Photo
	Size  lib.PhotoMetadataSize
	Title lib.PhotoMetadataTitle
	Tags  lib.PhotoMetadataTags
}

var viewTemplate = mustTemplateAsset("view/index.tmpl")
var manageTemplate = mustTemplateAsset("manage/index.tmpl")

func mustTemplateAsset(name string) *template.Template {
	buf, err := web.FS.ReadFile(name)
	if err != nil {
		panic(err)
	}
	return template.Must(
		template.New(name).Funcs(funcs).Parse(string(buf)),
	)
}

func photo(p Photo) template.URL {
	return template.URL(p.Path().String())
}

func preview(p Photo, height int, format lib.PhotoFormat, quality int) template.Srcset {
	preview := p.GetPreview(lib.PreviewOption{
		Height:  height,
		Format:  format,
		Quality: quality,
	})
	path := strings.ReplaceAll(preview.Path().String(), ",", "%2C")
	return template.Srcset(path)
}