package templates

import (
	"fmt"
	"log"
	"net/http"
	"text/template"
)

type InputProps struct {
	Type      string `json:",omitempty"`
	Name      string
	Required  bool `json:",omitempty"`
	Value     string
	Error     string `json:",omitempty"`
	MinLength uint   `json:",omitempty"`
}

func (p *InputProps) Validate() bool {
	if p.Required && p.Value == "" {
		p.Error = fmt.Sprintf("%v is required", p.Name)
		return false
	}

	value_len := len(p.Value)
	if p.MinLength > 0 && int(p.MinLength) > value_len {
		p.Error = fmt.Sprintf("%v requires at least %v characters (currently %v characters)", p.Name, p.MinLength, value_len)
		return false
	}

	return true
}

var tmpls map[string]*template.Template = loadTemplates()

func Execute(w http.ResponseWriter, name string, data any) {
	err := tmpls[name].Execute(w, data)
	if err != nil {
		log.Printf("Failed to execute '%s' template: %s\n", name, err)
		return
	}
}

func loadTemplates() map[string]*template.Template {
	homeTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/home.gotmpl"))
	loginTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/login.gotmpl"))
	registerTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/register.gotmpl"))
	foreignTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/foreign_wishlist.gotmpl"))
	publicWishlistTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/public_foreign_wishlist.gotmpl"))
	errorTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/error_page.gotmpl"))
	groupTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/group_page.gotmpl"))
	publicGroupTmpl := template.Must(template.ParseFiles("templates/base.gotmpl", "templates/public_group_page.gotmpl"))
	return map[string]*template.Template{
		"home.gotmpl":                    homeTmpl,
		"login.gotmpl":                   loginTmpl,
		"register.gotmpl":                registerTmpl,
		"foreign_wishlist.gotmpl":        foreignTmpl,
		"public_foreign_wishlist.gotmpl": publicWishlistTmpl,
		"error_page.gotmpl":              errorTmpl,
		"group_page.gotmpl":              groupTmpl,
		"public_group_page.gotmpl":       publicGroupTmpl,
	}
}