package site

import (
	"encoding/json"
	"fmt"
	"html/template"
	"net/http"
	"path"
	"strconv"
	"strings"

	"github.com/angelbeltran/templater"

	"ruben/inventory2/internal/domains/accounts"
	"ruben/inventory2/internal/domains/authentication"
	etsy_platform "ruben/inventory2/internal/domains/platforms/etsy"
	"ruben/inventory2/internal/domains/raw_events"
	"ruben/inventory2/internal/site/response"
)

type Server struct {
	http.Handler
	contentDir string
	templater  *templater.Templater
	rawEvents  *raw_events.Store
	accts      *accounts.Store
	etsy       *etsy_platform.Platform
	auth       *authentication.Authenticator
}

func NewServer(
	contentDir string,
	rawEvents *raw_events.Store,
	accts *accounts.Store,
	etsy *etsy_platform.Platform,
	auth *authentication.Authenticator,
) *Server {
	mux := http.NewServeMux()

	s := &Server{
		contentDir: contentDir,
		templater: templater.NewTemplater(
			contentDir+"/templates",
			func() template.FuncMap {
				return template.FuncMap{
					"buildSitePath": func(parts ...any) string {
						strParts := make([]string, len(parts))
						for i, p := range parts {
							strParts[i] = fmt.Sprint(p)
						}

						// TODO: make "/site" dynamic somehow
						//return path.Join(append([]string{"/site"}, strParts...)...)
						return path.Join(strParts...)
					},
					"splitPath": func(p string) []string {
						if p == "" {
							return nil
						}
						return strings.Split(strings.TrimSuffix(strings.TrimPrefix(p, "/"), "/"), "/")
					},

					"prettyPrintJSON": func(j json.RawMessage) string {
						b, err := json.MarshalIndent(j, " ", "")
						if err != nil {
							return string(j)
						}
						return string(b)
					},

					"parseInt64": func(s string) (int64, error) {
						return strconv.ParseInt(s, 10, 64)
					},

					"addInt": func(a, b int) int {
						return a + b
					},
					"subInt": func(a, b int) int {
						return a - b
					},
					"multInt": func(a, b int) int {
						return a * b
					},
				}
			},
		),
		rawEvents: rawEvents,
		accts:     accts,
		etsy:      etsy,
		auth:      auth,
	}

	// api routes

	mux.Handle("GET /login", response.Handler(s.loginPage))
	mux.Handle("GET /login/callback", response.Handler(s.loginCallback))
	mux.Handle("GET /logout", response.Handler(s.logoutPage))
	mux.Handle("POST /accounts", response.Handler(s.authenticateAndAddIdentity(s.createAccount)))

	// TODO: eliminate once no longer used.
	mux.HandleFunc("POST /login", response.Handler(s.login))

	// webpage content

	scfs := http.FileServer(http.Dir(contentDir + "/scripts"))
	mux.Handle("GET /scripts/", http.StripPrefix("/scripts", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/javascript")
		if path.Ext(r.URL.Path) == ".gz" {
			w.Header().Set("Content-Encoding", "gzip")
		}
		scfs.ServeHTTP(w, r)
	})))
	mux.Handle("GET /styles/", http.StripPrefix("/styles", http.FileServer(http.Dir(contentDir+"/styles"))))

	// webpages

	// all non-authenticated webpages
	mux.HandleFunc("GET /{$}", response.Handler(s.addIdentity(s.serveTemplates)))

	// all authenticated webpages
	mux.HandleFunc("GET /", response.Handler(s.authenticateAndAddIdentity(s.serveTemplates)))

	s.Handler = mux

	return s
}