// DataTable demo. Route: /table
//
// Two tables: one over a local array, one backed by /api/accounts.
//
// The remote table does not receive a fetch function. Component props travel
// as HTML attributes, so a function passed that way arrives as its own source
// text rather than something callable. Instead the table emits a `request`
// output and we answer it by dispatching the rows back with the same id.
page TablePage {

  state localRows = [
    { id: 1, name: "Northwind", plan: "Scale", seats: 42, renewsOn: "2026-02-09" },
    { id: 2, name: "Acme Industrial", plan: "Team", seats: 8, renewsOn: "2026-01-10" },
    { id: 3, name: "Globex", plan: "Enterprise", seats: 210, renewsOn: "2025-12-24" },
    { id: 4, name: "Initech", plan: "Starter", seats: 5, renewsOn: "2026-03-02" },
    { id: 5, name: "Umbrella", plan: "Scale", seats: 96, renewsOn: "2026-01-31" }
  ]

  state localColumns = [
    { key: "name", label: "Account", sortable: true },
    { key: "plan", label: "Plan", sortable: true },
    { key: "seats", label: "Seats", align: "end", sortable: true, type: "number" },
    { key: "renewsOn", label: "Renews", align: "end", sortable: true, type: "date" }
  ]

  state remoteColumns = [
    { key: "name", label: "Account", sortable: true },
    { key: "owner", label: "Owner", sortable: true },
    { key: "plan", label: "Plan", align: "center" },
    { key: "seats", label: "Seats", align: "end", sortable: true, type: "number" },
    { key: "renewsOn", label: "Renews", align: "end", sortable: true, type: "date" }
  ]

  state tableActions = []
  state lastEvent = "none yet"

  functions {
    // The table asks for rows through its `request` output; we answer by
    // dispatching the result back with the same instanceId. It cannot simply
    // call a function we hand it: component props travel as HTML attributes,
    // so a function would arrive as its own source text.
    function loadAccounts(payload) {
      var id = payload.instanceId
      var search = new URLSearchParams({
        page: String(payload.page),
        pageSize: String(payload.pageSize),
        query: payload.query || "",
        sortKey: payload.sortKey || "",
        sortDirection: payload.sortDirection || "asc"
      })

      fetch("/api/accounts?" + search.toString())
        .then(function (response) {
          if (!response.ok) {
            throw new Error("Request failed with status " + response.status)
          }
          return response.json()
        })
        .then(function (data) {
          window.dispatchEvent(new CustomEvent("wrnexus:datatable:rows", {
            detail: { instanceId: id, rows: data.rows, total: data.total }
          }))
        })
        .catch(function (error) {
          window.dispatchEvent(new CustomEvent("wrnexus:datatable:error", {
            detail: { instanceId: id, message: error.message }
          }))
        })
    }

    function onTableChange(payload) {
      lastEvent =
        "page " + payload.page + " of " + Math.max(1, Math.ceil(payload.total / payload.pageSize)) +
        " · " + payload.total + " records" +
        (payload.sortKey ? " · sorted by " + payload.sortKey + " " + payload.sortDirection : "")
    }

    function onTableAction(payload) {
      toast.info(payload.id + " on " + payload.rows.length + " record(s)")
    }
  }

  style {
    .table-demo-section {
      display: grid;
      gap: 0.75rem;
      margin-top: 2rem;
    }

    .table-demo-note {
      margin: 0;
      color: var(--wrn-color-text-muted);
      font-size: 0.82rem;
    }

    .table-demo-note code {
      color: var(--wrn-color-text);
    }
  }

  view {
    <h1>Data table</h1>
    <p>
      Sorting, filtering, paging and selection over a local array, and the same
      component driven by an API through its <code>request</code> output.
    </p>

    <section class="table-demo-section">
      <h2>Local array</h2>
      <p class="table-demo-note">
        Everything is derived in the browser. The Renews column declares
        <code>type: "date"</code>, so it sorts chronologically rather than
        alphabetically.
      </p>

      <DataTable
        columns={localColumns}
        rows={localRows}
        actions={tableActions}
        caption="Accounts"
        pageSize={5}
        selectable={true}
        gridlines="grid"
      />
    </section>

    <section class="table-demo-section">
      <h2>Loaded from an API</h2>
      <p class="table-demo-note">
        With <code>remote</code> the table emits a <code>request</code> for each
        view change and waits to be handed rows back. Sorting and searching are
        done by <code>/api/accounts</code> — the table never sees the other pages.
      </p>

      <DataTable
        columns={remoteColumns}
        remote={true}
        @request="loadAccounts(payload)"
        caption="Accounts (server side)"
        description="22 records, paged by the API."
        pageSize={6}
        pageSizes={[6, 12, 22]}
        paginationStyle="numbered"
        searchPlaceholder="Search accounts"
        stickyFirstColumn={true}
        selectable={true}
        @change="onTableChange(payload)"
        @action="onTableAction(payload)"
      />

      <p class="table-demo-note">Last change event: <strong>{lastEvent}</strong></p>
    </section>

    <Toaster position="bottom-right" />
  }
}