package main

import (
	"embed"
	"io/fs"
	"log"
	"net/http"
	"strings"

	"github.com/squid/MigaduAdmin/internal/api"
	"github.com/squid/MigaduAdmin/internal/auth"
	"github.com/squid/MigaduAdmin/internal/config"
	"github.com/squid/MigaduAdmin/internal/migadu"
	"github.com/squid/MigaduAdmin/internal/store"
)

//go:embed all:ui
var uiEmbed embed.FS

func main() {
	cfg, err := config.Load()
	if err != nil {
		log.Fatalf("config: %v", err)
	}

	st, err := store.Open(cfg.DatabasePath)
	if err != nil {
		log.Fatalf("database: %v", err)
	}
	defer st.Close()

	authService := auth.NewService(st, cfg)
	migaduClient := migadu.NewClient(cfg.MigaduBaseURL, cfg.MigaduUser, cfg.MigaduAPIKey)
	server := api.New(cfg, authService, st, migaduClient)

	staticHandler, err := spaHandler()
	if err != nil {
		log.Fatalf("ui assets: %v", err)
	}

	handler := server.Router(staticHandler)
	log.Printf("MigaduAdmin listening on %s", cfg.ListenAddr)
	log.Printf(
		"Migadu credentials: user=%q api_key=%s base=%s",
		cfg.MigaduUser,
		cfg.MaskedMigaduKey(),
		cfg.MigaduBaseURL,
	)
	if err := http.ListenAndServe(cfg.ListenAddr, handler); err != nil {
		log.Fatalf("server: %v", err)
	}
}

func spaHandler() (http.Handler, error) {
	sub, err := fs.Sub(uiEmbed, "ui")
	if err != nil {
		return nil, err
	}

	fileServer := http.FileServer(http.FS(sub))
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		path := strings.TrimPrefix(r.URL.Path, "/")
		if path == "" {
			path = "index.html"
		}
		if _, err := fs.Stat(sub, path); err == nil && !strings.HasSuffix(path, "/") {
			fileServer.ServeHTTP(w, r)
			return
		}
		// SPA fallback for client-side routes
		index, err := fs.ReadFile(sub, "index.html")
		if err != nil {
			http.Error(w, "ui not available", http.StatusInternalServerError)
			return
		}
		w.Header().Set("Content-Type", "text/html; charset=utf-8")
		_, _ = w.Write(index)
	}), nil
}