package view

import (
	"errors"
	"fmt"
	"html/template"
	"io"
	"log"
	"net/http"
	"os"

	"github.com/eknkc/amber"

	"git.aiterp.net/AiteRP/aitestory/server"
	"git.aiterp.net/gisle/wrouter/response"
)

var wd, _ = os.Getwd()
var cache = make(map[string]*template.Template)
var argsCache = make(map[string][]string)

var defaultOptions = amber.Options{PrettyPrint: true}
var defaultDirOptions = amber.DirOptions{Ext: ".amber", Recursive: true}

// Render renders a template with the name it was registered with, and with the
// view model. The view model is expected to be the correct model from the viewmodel
// package
func Render(w http.ResponseWriter, name string, status int, viewModel interface{}) {
	var err error

	if server.Main.Config.Server.Debug {
		cache, err = amber.CompileDir(server.Main.Config.Directories.Templates, defaultDirOptions, defaultOptions)
		if err != nil {
			log.Println(err)
		}
	}

	tmpl, ok := cache[name]
	if !ok {
		response.Text(w, 500, "Template not found: "+name)
		return
	}

	w.WriteHeader(status)
	err = tmpl.Execute(w, viewModel)
	if err != nil {
		log.Println("Template error:", err.Error())
		response.Text(w, 500, "Template error: "+err.Error())
	}
}

// Run runs the template to a simple io.Writer. It's made for testing
func Run(w io.Writer, name string, viewModel interface{}) error {
	tmpl, ok := cache[name]
	if !ok {
		return errors.New("template not found")
	}

	return tmpl.ExecuteTemplate(w, "base", viewModel)
}

func init() {
	var err error

	for key, value := range funcMap {
		if _, exists := amber.FuncMap[key]; exists {
			log.Printf("Amber already provides a function by the name: %s", key)
		}

		amber.FuncMap[key] = value
	}

	cache, err = amber.CompileDir(server.Main.Config.Directories.Templates, defaultDirOptions, defaultOptions)
	if err != nil {
		if server.Main.Config.Server.Debug {
			log.Println(err)
			return
		}

		log.Fatalln(err)
	}

	if server.Main.Config.Server.Debug {
		fmt.Printf("Template directory: %s\n", server.Main.Config.Directories.Templates)

		for key := range cache {
			fmt.Printf("Template loaded: %s\n", key)
		}
	}
}