package render

// light renderer package that used for generating html templates
// loading the template files from views folder
// using part folder as template parts
// using tag folder as templates of html tags

import (
	"api_manager/lib"
	"os"
	"strings"
)

// loading default head and foot template and adding custom string in the middle
func Template_with_string(str string) string {
	// loading head.html and foot.html
	head, err := os.ReadFile("web/views/head.html")
	foot, err := os.ReadFile("web/views/foot.html")
	// handling error by lib function and exiting if it occures
	lib.Handle_err(err, lib.Map_args("die", "1"))

	// combining html parts
	template := "" + string(head) + str + string(foot)

	return template
}

// loading default head and foot template and adding html template from file in the middle
func Template_with_page(str string) string {
	// loading head.html and foot.html
	head, err := os.ReadFile("web/views/head.html")
	foot, err := os.ReadFile("web/views/foot.html")
	// loading custom html template file
	page, err := os.ReadFile("web/views/" + str + ".html")
	// handling error by lib function and exiting if it occures
	lib.Handle_err(err, lib.Map_args("die", "1"))

	// combining html parts
	template := "" + string(head) + string(page) + string(foot)

	return template
}

// loading default head and foot template and adding html template from tag file in the middle
func Template_of_tag(html_tag string) string {
	// loading head.html and foot.html
	tag, err := os.ReadFile("web/views/tag/" + html_tag + ".html")
	// handling error by lib function and exiting if it occures
	lib.Handle_err(err, lib.Map_args("die", "1"))

	return string(tag)
}

// loading default head and foot template and adding html template from part file in the middle
func Template_of_part(part_name string) string {
	// loading head.html and foot.html
	head, err := os.ReadFile("web/views/head.html")
	page, err := os.ReadFile("web/views/part/" + part_name + ".html")
	foot, err := os.ReadFile("web/views/foot.html")
	// handling error by lib function and exiting if it occures
	lib.Handle_err(err, lib.Map_args("die", "1"))

	// combining html parts
	template := "" + string(head) + string(page) + string(foot)

	return template
}

// getting template string and replacing templating tags with variables
func Put_vars_to_template(template string, vars map[string]string) string {
	// run through vars array gettin key as tag to find in template and value as value to replace it with
	for tag, value := range vars {
		// find the tag and replace it with value
		template = strings.Replace(template, "{{"+tag+"}}", value, 1)
	}

	return template
}