package web

import (
	"fmt"
	"net/http"
	"net/url"

	"vibetree/internal/assets"
	"vibetree/internal/models"
)

type settingsImportPageData struct {
	User     *models.User
	Kind     string
	Imported int
	Updated  int
	Errs     int
	Error    string
}

// handleSettingsImportPage backs the admin "Import / Export" settings page:
// global CSV import for assets (with a Folder column, optionally
// auto-creating missing folders) and for statuses, plus format examples.
// This is distinct from the folder-scoped "Import CSV..." context-menu
// action in the tree, which never needs a Folder column.
func (a *App) handleSettingsImportPage(w http.ResponseWriter, r *http.Request) {
	q := r.URL.Query()
	a.Render(w, http.StatusOK, "settings_import", settingsImportPageData{
		User:     currentUser(r),
		Kind:     q.Get("kind"),
		Imported: queryInt(r, "imported", 0),
		Updated:  queryInt(r, "updated", 0),
		Errs:     queryInt(r, "errs", 0),
		Error:    q.Get("error"),
	})
}

func (a *App) handleSettingsImportAssets(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	if err := r.ParseMultipartForm(32 << 20); err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	file, _, err := r.FormFile("file")
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	defer file.Close()

	createMissing := r.FormValue("create_missing_folders") == "1"

	itemTypes, err := a.ItemTypes.List(ctx, true)
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	statusList, err := a.Statuses.List(ctx)
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	userList, err := a.Users.List(ctx)
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}

	result, err := a.Assets.Import(ctx, file, assets.ImportOptions{CreateMissingFolders: createMissing}, itemTypes, statusList, userList)
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=assets&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	http.Redirect(w, r, fmt.Sprintf("/settings/import?kind=assets&imported=%d&updated=%d&errs=%d", result.Created, result.Updated, len(result.Errors)), http.StatusSeeOther)
}

func (a *App) handleSettingsImportStatuses(w http.ResponseWriter, r *http.Request) {
	if err := r.ParseMultipartForm(10 << 20); err != nil {
		http.Redirect(w, r, "/settings/import?kind=statuses&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	file, _, err := r.FormFile("file")
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=statuses&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	defer file.Close()

	result, err := a.Statuses.Import(r.Context(), file)
	if err != nil {
		http.Redirect(w, r, "/settings/import?kind=statuses&error="+url.QueryEscape(err.Error()), http.StatusSeeOther)
		return
	}
	http.Redirect(w, r, fmt.Sprintf("/settings/import?kind=statuses&imported=%d&updated=%d&errs=%d", result.Created, result.Updated, len(result.Errors)), http.StatusSeeOther)
}