package router

import (
	"fmt"
	"html/template"
	"net/http"
	"strings"
	"time"

	"go.jolheiser.com/vanity/flags"
	"go.jolheiser.com/vanity/service"

	"github.com/go-chi/chi"
	"github.com/go-chi/chi/middleware"
	"go.jolheiser.com/beaver"
)

var tmpl *template.Template

func Init() (*chi.Mux, error) {
	var err error
	tmpl, err = Templates()
	if err != nil {
		return nil, err
	}

	r := chi.NewRouter()
	r.Use(middleware.RedirectSlashes)
	r.Use(middleware.Recoverer)
	r.Use(middleware.Timeout(60 * time.Second))

	r.Get("/", doIndex)
	r.Get("/*", doVanity)
	r.Mount("/_", apiRoutes())

	svc = service.New()

	beaver.Info("Warming up cache...")
	updateCache()
	beaver.Infof("Finished warming up cache: %s", cache.Packages.Names())
	go cronStart()

	beaver.Infof("Running vanity server at http://localhost:%d", flags.Port)
	return r, nil
}

func doIndex(res http.ResponseWriter, req *http.Request) {
	format := "list"
	if flags.Topics {
		format = "topics"
	}
	q := req.URL.Query().Get("format")
	if q != "" {
		format = q
	}

	if err := tmpl.Lookup("index.tmpl").Execute(res, map[string]interface{}{
		"Packages": cache.Packages,
		"Index":    true,
		"Format":   format,
	}); err != nil {
		beaver.Errorf("could not write response: %v", err)
	}
}

func doVanity(res http.ResponseWriter, req *http.Request) {
	key := chi.URLParam(req, "*")
	pkg, ok := cache.Packages[strings.Split(key, "/")[0]]
	if !ok {
		http.NotFound(res, req)
		return
	}

	ctx := map[string]interface{}{
		"Package":  pkg,
		"Module":   pkg.Module(flags.Domain),
		"GoSource": fmt.Sprintf("%s %s %s %s", pkg.Module(flags.Domain), pkg.CloneHTTP, svc.GoDir(pkg), svc.GoFile(pkg)),
		"Index":    false,
	}

	q := req.URL.Query()
	if q.Get("go-get") != "" || q.Get("git-import") != "" {
		if err := tmpl.Lookup("import.tmpl").Execute(res, ctx); err != nil {
			beaver.Errorf("could not write response: %v", err)
		}
		return
	}

	if err := tmpl.Lookup("vanity.tmpl").Execute(res, ctx); err != nil {
		beaver.Errorf("could not write response: %v", err)
	}
}