package handlers

import (
	"net/http"
	"strings"

	"amnezia-share/internal/models"
	"amnezia-share/internal/web"
)

type adminRenewalView struct {
	adminLayout
	Codes []models.RenewalCode
}

// AdminRenewalGet lists renewal codes (admin/renewal_codes.php GET).
func AdminRenewalGet(a *web.App) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ok, errText := flashFromQuery(r)
		view := adminRenewalView{adminLayout: newAdminLayout(a, r, "renewal")}
		view.OK, view.Error = ok, errText
		codes, err := a.Share.ListCodes(r.Context())
		if err != nil {
			view.Error = err.Error()
		}
		view.Codes = codes
		a.Render(w, r, "page_admin_renewal", view)
	}
}

// AdminRenewalPost handles renewal code create/delete (admin/renewal_codes.php
// POST).
func AdminRenewalPost(a *web.App) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := r.Context()
		var err error
		var okMsg string

		switch r.FormValue("action") {
		case "create":
			code := r.FormValue("code")
			addDays := formInt(r, "add_days", 30)
			maxUses := formInt(r, "max_uses", 1)
			target := strings.TrimSpace(r.FormValue("code_target"))
			note := r.FormValue("note")
			expiresAt := parseFormDate(r.FormValue("code_expires_at"))

			var linkID *int
			if target != "member" {
				if v := formInt(r, "share_link_id", 0); v > 0 {
					linkID = &v
				}
			}

			created, cerr := a.Share.CreateRenewalCode(ctx, code, addDays, maxUses, linkID, expiresAt, note, target)
			err = cerr
			if err == nil {
				okMsg = "Код создан: " + created.Code
			}

		case "delete":
			id := formInt(r, "code_id", 0)
			err = a.Share.DeleteCode(ctx, id)
			if err == nil {
				okMsg = "Код удалён."
			}

		default:
			err = errUnknownAction
		}

		errText := ""
		if err != nil {
			errText = err.Error()
		}
		redirectWithFlash(w, r, a, "admin/renewal", okMsg, errText)
	}
}