package main

import (
	"bytes"
	"embed"
	"log"
	"net/http"
	"path"
	"strings"
	"text/template"

	"srs.epita.fr/fic-server/admin/api"
	"srs.epita.fr/fic-server/admin/sync"
	"srs.epita.fr/fic-server/libfic"

	"github.com/julienschmidt/httprouter"
)

//go:embed static

var assets embed.FS

var indexPage []byte

func genIndex(baseURL string) {
	b := bytes.NewBufferString("")
	if indexTmpl, err := template.New("index").Parse(indextpl); err != nil {
		log.Fatal("Cannot create template:", err)
	} else if err = indexTmpl.Execute(b, map[string]string{"urlbase": path.Clean(path.Join(baseURL+"/", "nuke"))[:len(path.Clean(path.Join(baseURL+"/", "nuke")))-4]}); err != nil {
		log.Fatal("An error occurs during template execution:", err)
	} else {
		indexPage = b.Bytes()
	}
}

func serveIndex(w http.ResponseWriter, r *http.Request) {
	w.Write(indexPage)
}

var staticFS http.FileSystem

func serveFile(w http.ResponseWriter, r *http.Request, url string) {
	r.URL.Path = url
	http.FileServer(staticFS).ServeHTTP(w, r)
}

func init() {
	api.Router().GET("/", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/claims/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/exercices/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/events/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/files", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/public/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/pki/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/settings/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/teams/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})
	api.Router().GET("/themes/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveIndex(w, r)
	})

	api.Router().GET("/css/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, r.URL.Path)
	})
	api.Router().GET("/fonts/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, r.URL.Path)
	})
	api.Router().GET("/img/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, r.URL.Path)
	})
	api.Router().GET("/js/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, r.URL.Path)
	})
	api.Router().GET("/views/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, r.URL.Path)
	})

	api.Router().GET("/files/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		http.ServeFile(w, r, path.Join(fic.FilesDir, strings.TrimPrefix(r.URL.Path, "/files")))
	})
	api.Router().GET("/submissions/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		http.ServeFile(w, r, path.Join(api.TimestampCheck, strings.TrimPrefix(r.URL.Path, "/submissions")))
	})
	api.Router().GET("/vids/*_", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		if importer, ok := sync.GlobalImporter.(sync.LocalImporter); ok {
			http.ServeFile(w, r, path.Join(importer.Base, strings.TrimPrefix(r.URL.Path, "/vids")))
		} else {
			http.Error(w, "Only available with local importer.", 400)
		}
	})

	api.Router().GET("/check_import.html", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		serveFile(w, r, "check_import.html")
	})
	api.Router().GET("/full_import_report.json", func(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
		http.ServeFile(w, r, sync.DeepReportPath)
	})
}