(function () {
  function money(n) {
    if (n === null || n === undefined || n === "") return "—";
    var v = Number(n);
    if (Number.isNaN(v)) return "—";
    return "$" + v.toFixed(2);
  }

  function initPostcardRoutes(opts) {
    var form = document.getElementById("campaign-compose");
    if (!form) return;
    var audience = document.getElementById("id_audience");
    var picker = document.getElementById("postcard-route-picker");
    var listCost = document.getElementById("postcard-list-cost");
    var hidden = document.getElementById("id_route_targeting");
    var findBtn = document.getElementById("route-find-btn");
    var status = document.getElementById("route-status");
    var tableWrap = document.getElementById("route-table-wrap");
    var tbody = document.getElementById("route-table-body");
    var selectedBox = document.getElementById("route-selected-cost");
    var quoteUrl = opts.quoteUrl;
    var csrfToken = opts.csrfToken;
    var maxRoutes = 2;
    var routes = [];

    function isPostcardAudience() {
      var v = (audience && audience.value) || "";
      return v === "postcard_opt_in" || v === "carrier_route";
    }

    function isRouteAudience() {
      return ((audience && audience.value) || "") === "carrier_route";
    }

    function templateId() {
      return (document.getElementById("id_template_id") || {}).value || "";
    }

    function setStatus(text, isError) {
      if (!status) return;
      status.textContent = text || "";
      status.classList.toggle("error", !!isError);
    }

    function selectedCodes() {
      return Array.prototype.map.call(
        form.querySelectorAll('input[name="route_code"]:checked'),
        function (el) { return el.value; }
      );
    }

    function postQuote(body) {
      return fetch(quoteUrl, {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
          "X-CSRFToken": csrfToken,
          Accept: "application/json"
        },
        credentials: "same-origin",
        body: JSON.stringify(body)
      }).then(function (res) {
        return res.json().then(function (json) {
          if (!res.ok) throw new Error(json.detail || "Quote failed");
          return json;
        });
      });
    }

    function renderListCost(data) {
      if (!listCost) return;
      if (!isPostcardAudience() || isRouteAudience()) {
        listCost.hidden = true;
        return;
      }
      listCost.hidden = false;
      var src = data.price_source === "fallback" ? " (env fallback rate)" : "";
      if (data.per_piece == null) {
        listCost.innerHTML =
          "<strong>Estimated cost:</strong> " + data.count +
          " household" + (data.count === 1 ? "" : "s") +
          " · per-piece price unavailable. Set PCM_POSTCARD_PRICE_STANDARD / FIRSTCLASS.";
        return;
      }
      listCost.innerHTML =
        "<strong>Estimated cost:</strong> " + data.count +
        " × " + money(data.per_piece) + " = " + money(data.total) +
        " (" + data.mail_class + src + ")";
    }

    function refreshListCost() {
      if (!isPostcardAudience() || isRouteAudience()) {
        if (listCost) listCost.hidden = true;
        return;
      }
      postQuote({ action: "mailing_list", template_id: templateId() })
        .then(renderListCost)
        .catch(function (err) {
          if (listCost) {
            listCost.hidden = false;
            listCost.textContent = err.message || "Could not load mailing-list cost.";
          }
        });
    }

    function writeHidden(payload) {
      if (hidden) hidden.value = payload ? JSON.stringify(payload) : "";
    }

    function renderSelected(data) {
      if (!selectedBox) return;
      if (!data) {
        selectedBox.hidden = true;
        writeHidden("");
        return;
      }
      selectedBox.hidden = false;
      var src = data.price_source === "fallback" ? " using env fallback rate" : "";
      var missing = data.per_piece == null
        ? " Per-piece price unavailable — set PCM_POSTCARD_PRICE_* before sending."
        : "";
      selectedBox.innerHTML =
        "<strong>Selected:</strong> " + (data.record_count || 0) +
        " household" + ((data.record_count || 0) === 1 ? "" : "s") +
        " on " + (data.selected_codes || []).join(", ") +
        " · " + (data.mail_class || "") +
        " · est. " + money(data.total) + src + "." + missing;
      writeHidden({
        selected_codes: data.selected_codes,
        list_count_id: data.list_count_id,
        record_count: data.record_count,
        mail_class: data.mail_class,
        estimated: data.estimated,
        route_rows: data.route_rows || data.routes
      });
    }

    function recount() {
      var codes = selectedCodes();
      if (!codes.length) {
        renderSelected(null);
        setStatus("Select one or two routes.");
        return;
      }
      setStatus("Updating quote…");
      postQuote({
        action: "select",
        template_id: templateId(),
        routes: codes
      }).then(function (data) {
        setStatus("");
        renderSelected(data);
      }).catch(function (err) {
        renderSelected(null);
        setStatus(err.message || "Could not quote selected routes.", true);
      });
    }

    function renderRoutes(list) {
      routes = list || [];
      if (!tbody || !tableWrap) return;
      if (!routes.length) {
        tableWrap.hidden = true;
        tbody.innerHTML = "";
        return;
      }
      tableWrap.hidden = false;
      tbody.innerHTML = routes.map(function (row) {
        return "<tr>" +
          "<td><label class=\"check-row\" style=\"margin:0\">" +
          "<input type=\"checkbox\" name=\"route_code\" value=\"" +
          String(row.code).replace(/"/g, "&quot;") + "\"> " +
          String(row.code) + "</label></td>" +
          "<td>" + String(row.text || "") + "</td>" +
          "<td>" + String(row.total) + "</td>" +
          "<td>" + money(row.cost) + "</td></tr>";
      }).join("");
      tbody.querySelectorAll('input[name="route_code"]').forEach(function (box) {
        box.addEventListener("change", function () {
          var checked = selectedCodes();
          if (checked.length > maxRoutes) {
            box.checked = false;
            setStatus("Pick at most two routes.", true);
            return;
          }
          recount();
        });
      });
    }

    function findRoutes() {
      var zip = (document.getElementById("route-zip") || {}).value || "";
      var address = (document.getElementById("route-address") || {}).value || "";
      var city = (document.getElementById("route-city") || {}).value || "";
      var state = (document.getElementById("route-state") || {}).value || "";
      var radius = (document.getElementById("route-radius") || {}).value || "";
      setStatus("Looking up routes…");
      tableWrap.hidden = true;
      renderSelected(null);
      postQuote({
        action: "search",
        template_id: templateId(),
        zip: zip,
        address: address,
        city: city,
        state: state,
        radius: radius
      }).then(function (data) {
        renderRoutes(data.routes || []);
        if (!(data.routes || []).length) {
          setStatus("No carrier routes for that search.", true);
        } else {
          setStatus("Select one or two routes. Cost uses " + (data.mail_class || "Standard") + ".");
        }
      }).catch(function (err) {
        renderRoutes([]);
        setStatus(err.message || "Route lookup failed.", true);
      });
    }

    function syncVisibility() {
      if (picker) picker.hidden = !isRouteAudience();
      if (!isRouteAudience()) {
        writeHidden("");
        if (selectedBox) selectedBox.hidden = true;
      }
      refreshListCost();
    }

    if (findBtn) findBtn.addEventListener("click", function (e) {
      e.preventDefault();
      findRoutes();
    });
    var tmpl = document.getElementById("id_template_id");
    if (tmpl) tmpl.addEventListener("change", function () {
      syncVisibility();
      if (isRouteAudience() && selectedCodes().length) recount();
    });
    if (audience) audience.addEventListener("change", syncVisibility);
    syncVisibility();

    window.MonicaPostcardRoutes = {
      isPostcardAudience: isPostcardAudience,
      isRouteAudience: isRouteAudience,
      syncVisibility: syncVisibility
    };
  }

  window.initPostcardRoutes = initPostcardRoutes;
})();