package web

import (
	"net/http"

	content "inventree/web"
)

// Router builds the complete HTTP handler for inventree: static assets,
// authentication, the AJAX-driven inventory tree, and the traditional
// full-page admin sections (item types, users, settings).
func (a *App) Router() http.Handler {
	mux := http.NewServeMux()

	// Static assets (Bootstrap, icons, vanilla JS) and health check are
	// always public.
	mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServerFS(mustSub(content.StaticFS, "static"))))
	mux.HandleFunc("GET /healthz", a.handleHealthz)

	// Auth
	mux.HandleFunc("GET /login", a.handleLoginForm)
	mux.HandleFunc("POST /login", a.handleLoginSubmit)
	mux.HandleFunc("POST /logout", a.handleLogout)

	mux.HandleFunc("GET /{$}", a.requireLogin(a.handleRoot))

	// Inventory tree (AJAX fragments)
	mux.HandleFunc("GET /inventory", a.requireLogin(a.handleInventoryPage))
	mux.HandleFunc("GET /app/tree/children", a.requireLogin(a.handleTreeChildren))
	mux.HandleFunc("POST /app/tree/collapse", a.requireLogin(a.handleTreeCollapse))
	mux.HandleFunc("POST /app/tree/collapse-all", a.requireLogin(a.handleTreeCollapseAll))

	mux.HandleFunc("GET /app/panel/root", a.requireLogin(a.handlePanelRoot))
	mux.HandleFunc("GET /app/panel/folders/{id}", a.requireLogin(a.handlePanelFolder))
	mux.HandleFunc("GET /app/panel/assets/{id}", a.requireLogin(a.handlePanelAsset))
	mux.HandleFunc("GET /app/panel/assets/new", a.requireAdmin(a.handlePanelAssetNew))
	mux.HandleFunc("GET /app/panel/assets/{id}/edit", a.requireAdmin(a.handlePanelAssetEdit))
	mux.HandleFunc("GET /app/forms/asset-fields", a.requireLogin(a.handleAssetFieldsFragment))

	mux.HandleFunc("GET /app/search", a.requireLogin(a.handleSearch))

	// Folder mutations (JSON in/out)
	mux.HandleFunc("GET /app/folders/options", a.requireAdmin(a.handleFolderOptions))
	mux.HandleFunc("GET /app/folders/{id}", a.requireAdmin(a.handleFolderGet))
	mux.HandleFunc("POST /app/folders", a.requireAdmin(a.handleFolderCreate))
	mux.HandleFunc("PATCH /app/folders/{id}", a.requireAdmin(a.handleFolderUpdate))
	mux.HandleFunc("POST /app/folders/{id}/move", a.requireAdmin(a.handleFolderMove))
	mux.HandleFunc("GET /app/folders/{id}/delete-info", a.requireAdmin(a.handleFolderDeleteInfo))
	mux.HandleFunc("DELETE /app/folders/{id}", a.requireAdmin(a.handleFolderDelete))

	// Asset mutations (JSON in/out)
	mux.HandleFunc("GET /app/assets/{id}", a.requireAdmin(a.handleAssetGet))
	mux.HandleFunc("POST /app/assets", a.requireAdmin(a.handleAssetCreate))
	mux.HandleFunc("PATCH /app/assets/{id}", a.requireAdmin(a.handleAssetUpdate))
	mux.HandleFunc("DELETE /app/assets/{id}", a.requireAdmin(a.handleAssetDelete))
	mux.HandleFunc("POST /app/assets/{id}/duplicate", a.requireAdmin(a.handleAssetDuplicate))
	mux.HandleFunc("POST /app/assets/{id}/move", a.requireAdmin(a.handleAssetMove))
	mux.HandleFunc("POST /app/assets/{id}/checkout", a.requireAdmin(a.handleAssetCheckout))
	mux.HandleFunc("POST /app/assets/{id}/status", a.requireAdmin(a.handleAssetSetStatus))
	mux.HandleFunc("POST /app/assets/{id}/quantity", a.requireAdmin(a.handleAssetQuantity))

	mux.HandleFunc("GET /app/users/options", a.requireAdmin(a.handleUserOptions))

	// CSV import/export
	mux.HandleFunc("GET /export/assets.csv", a.requireLogin(a.handleExportCSV))
	mux.HandleFunc("POST /import/assets.csv", a.requireAdmin(a.handleImportCSV))

	// QR asset tags: scan a printed label to jump to that asset, or print
	// a sheet of labels for a folder/asset.
	mux.HandleFunc("GET /scan/{tag}", a.requireLogin(a.handleScan))
	mux.HandleFunc("GET /labels", a.requireLogin(a.handleLabelsPage))

	// Settings (admin, traditional pages) - Item Types, Users, and general
	// settings all live under one unified /settings section with shared
	// sub-navigation, rather than as separate top-level nav items.
	mux.HandleFunc("GET /settings", a.requireAdmin(a.handleSettingsPage))
	mux.HandleFunc("POST /settings/general", a.requireAdmin(a.handleSettingsGeneral))
	mux.HandleFunc("GET /settings/statuses", a.requireAdmin(a.handleSettingsStatusesPage))
	mux.HandleFunc("POST /settings/statuses", a.requireAdmin(a.handleStatusCreate))
	mux.HandleFunc("POST /settings/statuses/{id}", a.requireAdmin(a.handleStatusUpdate))
	mux.HandleFunc("POST /settings/statuses/{id}/delete", a.requireAdmin(a.handleStatusDelete))
	mux.HandleFunc("POST /settings/statuses/{id}/reorder", a.requireAdmin(a.handleStatusReorder))

	mux.HandleFunc("GET /settings/item-types", a.requireAdmin(a.handleItemTypesList))
	mux.HandleFunc("GET /settings/item-types/new", a.requireAdmin(a.handleItemTypeNewForm))
	mux.HandleFunc("POST /settings/item-types", a.requireAdmin(a.handleItemTypeCreate))
	mux.HandleFunc("GET /settings/item-types/{id}/edit", a.requireAdmin(a.handleItemTypeEditForm))
	mux.HandleFunc("POST /settings/item-types/{id}", a.requireAdmin(a.handleItemTypeUpdate))
	mux.HandleFunc("POST /settings/item-types/{id}/delete", a.requireAdmin(a.handleItemTypeDelete))
	mux.HandleFunc("POST /settings/item-types/{id}/fields", a.requireAdmin(a.handleFieldCreate))
	mux.HandleFunc("POST /settings/item-types/{id}/fields/{fieldID}", a.requireAdmin(a.handleFieldUpdate))
	mux.HandleFunc("POST /settings/item-types/{id}/fields/{fieldID}/delete", a.requireAdmin(a.handleFieldDelete))

	mux.HandleFunc("GET /settings/import", a.requireAdmin(a.handleSettingsImportPage))
	mux.HandleFunc("POST /settings/import/assets", a.requireAdmin(a.handleSettingsImportAssets))
	mux.HandleFunc("POST /settings/import/statuses", a.requireAdmin(a.handleSettingsImportStatuses))

	mux.HandleFunc("GET /settings/users", a.requireAdmin(a.handleUsersList))
	mux.HandleFunc("GET /settings/users/new", a.requireAdmin(a.handleUserNewForm))
	mux.HandleFunc("POST /settings/users", a.requireAdmin(a.handleUserCreate))
	mux.HandleFunc("GET /settings/users/{id}/edit", a.requireAdmin(a.handleUserEditForm))
	mux.HandleFunc("POST /settings/users/{id}", a.requireAdmin(a.handleUserUpdate))
	mux.HandleFunc("POST /settings/users/{id}/password", a.requireAdmin(a.handleUserPassword))
	mux.HandleFunc("POST /settings/users/{id}/delete", a.requireAdmin(a.handleUserDelete))

	return a.loadSession(mux)
}

func (a *App) handleHealthz(w http.ResponseWriter, r *http.Request) {
	if err := a.DB.PingContext(r.Context()); err != nil {
		writeErr(w, http.StatusServiceUnavailable, "database unavailable")
		return
	}
	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
	w.WriteHeader(http.StatusOK)
	_, _ = w.Write([]byte("ok"))
}

func (a *App) handleRoot(w http.ResponseWriter, r *http.Request) {
	http.Redirect(w, r, "/inventory", http.StatusSeeOther)
}