-- install/view.wo — the VIEW for /install. Static copy: no fields, so
-- the component has none. It is still a component, and still renders
-- through the same interface as every other page.
use view

pub class InstallPage {
  fn render() -> Text {
    let head = `
      <h1 class="text-3xl font-bold mb-4">Install writeonce</h1>
      <p class="leading-relaxed mb-6">Two native binaries — <code>woc</code>,
      the compiler, and <code>wovm</code>, the runtime VM. Both depend only on
      the system C library. There is no package manager to install, no
      language runtime to install on the machines you deploy to, and no
      build toolchain beyond these two files.</p>`;

    let sys = supported();

    let s1 = section("1. Download",
      `<p class="leading-relaxed mb-4">One tarball, two binaries. Take it from
      the GitHub release, or from this site as a mirror — they are the same
      bytes, and the checksum below proves it:</p>
      <p class="mb-4">
        <a class="btn no-underline" href="https://github.com/shoneyj/writeonce/releases/download/v0.1.0/writeonce-0.1.0-linux-amd64.tar.gz">Download 0.1.0 (linux-amd64)</a>
        <a class="btn-outline no-underline" href="/dl/writeonce-0.1.0-linux-amd64.tar.gz">Mirror</a>
      </p>
      <p class="leading-relaxed mb-4">Verify it before you extract it. The
      expected digest is served beside the archive at
      <a href="/dl/writeonce-0.1.0-linux-amd64.tar.gz.sha256">.sha256</a>:</p>`,
      code_block("curl -O https://writeonce.de/dl/writeonce-0.1.0-linux-amd64.tar.gz\ncurl -O https://writeonce.de/dl/writeonce-0.1.0-linux-amd64.tar.gz.sha256\nsha256sum -c writeonce-0.1.0-linux-amd64.tar.gz.sha256"));

    let s2 = section("2. Extract it",
      `<p class="leading-relaxed mb-4">Extract into <code>/usr/local</code>,
      replacing any previous install. Run this as root, or through
      <code>sudo</code>:</p>`,
      code_block("rm -rf /usr/local/writeonce\ntar -C /usr/local -xzf writeonce-0.1.0-linux-amd64.tar.gz"));

    let s3 = section("3. Put it on your PATH",
      `<p class="leading-relaxed mb-4">Add one line to your
      <code>$HOME/.profile</code> (or <code>/etc/profile</code> for every user
      on the box), then restart your shell:</p>`,
      code_block("export PATH=$PATH:/usr/local/writeonce/bin"));

    let s4 = section("4. Check it",
      `<p class="leading-relaxed mb-4">Both should print the same version.
      <code>woc</code> finds <code>wovm</code> beside itself, so a tarball
      install needs no further configuration.</p>`,
      code_block("woc version        # writeonce 0.1.0 linux/amd64\nwovm --version     # wovm 0.1.0"));

    let s5 = section("5. Your first project",
      `<p class="leading-relaxed mb-4">A project is a directory with a
      <code>wo.toml</code> manifest and one or more <code>.wo</code> files.
      Nothing else — no lockfile to create by hand, no scaffolding step.</p>`,
      code_block("mkdir hello && cd hello\n\ncat > wo.toml <<'EOF'\nname    = \"hello\"\nversion = \"0.1.0\"\n\n[runtime]\nwo = \">= 0.1\"\nEOF\n\ncat > main.wo <<'EOF'\nfn main() -> Int {\n  print(\"hello, writeonce\");\n  return 0;\n}\nEOF"));

    let s6 = section("6. Build and run",
      `<p class="leading-relaxed mb-4"><code>woc &lt;dir&gt;</code> emits ONE
      standalone binary at <code>target/&lt;name&gt;</code>. Copy that file to a
      server and run it — the VM is inside it, and so is the database.</p>`,
      code_block("woc .\n./target/hello        # hello, writeonce"));

    let s7 = section("7. Add a dependency",
      `<p class="leading-relaxed mb-4">Dependencies are git repositories pinned
      by revision. The <code>[deps]</code> KEY is the module name your code
      <code>use</code>s. <code>woc</code> writes a <code>wo.lock</code> with the
      exact revision, and a locked build works offline. See
      <a href="/packages">Packages</a> for what is available.</p>`,
      code_block("[deps]\nview = { git = \"https://github.com/shoneyj/writeonce-view\", rev = \"v0.1.0\" }"));

    let note = el("div", "bg-white rounded-lg border shadow-sm p-6 mt-8",
      el("h2", "text-lg font-bold mb-2", "Where things go") ..
      `<p class="leading-relaxed">The tarball installs to
      <code>/usr/local/writeonce</code>: <code>bin/woc</code>,
      <code>bin/wovm</code>, and a <code>VERSION</code> file. To point
      <code>woc</code> at a different VM, set <code>$WO_RUNTIME</code> or add a
      <code>[build] runtime = "..."</code> key to <code>wo.toml</code>. A
      manifest may also require a minimum toolchain with
      <code>[runtime] wo = "&gt;= 0.1"</code>; <code>woc</code> refuses to build
      a project that needs a newer toolchain than itself.</p>`);

    return head .. sys .. s1 .. s2 .. s3 .. s4 .. s5 .. s6 .. s7 .. note;
  }
}

-- What the release actually runs on. Every claim here is read off the
-- shipped binaries (`file`, and the highest GLIBC_ symbol version they
-- import), not off a wish list — an install page that overstates its
-- support costs someone an afternoon.
fn supported() -> Text {
  return `
    <div class="bg-white rounded-lg border shadow-sm p-6 mb-8">
      <h2 class="text-2xl font-bold mb-2">Supported systems</h2>
      <ul class="list-disc pl-6 leading-relaxed">
        <li class="mb-2"><b>Linux on x86-64</b> — the only target built today. There is no ARM, macOS or Windows build.</li>
        <li class="mb-2"><b>glibc 2.35 or newer.</b> The binaries link the system C library dynamically: <code>woc</code> imports symbols up to <code>GLIBC_2.35</code> and <code>wovm</code> up to <code>GLIBC_2.34</code>, read off the published v0.1.0 release. That covers Ubuntu 22.04+, Debian 12+ and Fedora 36+. On RHEL 9 (2.34) the runtime works but the compiler does not — build elsewhere and copy the binary over, which is the point of a self-contained executable.</li>
        <li class="mb-2"><b>Not musl.</b> Alpine needs a build against musl, which does not exist yet.</li>
        <li class="mb-2"><b>Nothing else.</b> No JVM, no Node, no Python, no package manager. The two binaries and libc are the whole dependency list.</li>
      </ul>
      <p class="leading-relaxed mt-4 text-gray-700">Check yours with
      <code>ldd --version</code>. If it is older than 2.35, build from source
      until a wider-compatibility release exists. The floor is set by the
      machine that BUILT the release, not by the language — the CI runner is
      pinned to Ubuntu 22.04 to keep it this low.</p>
    </div>`;
}

-- One numbered step: heading, prose, and the commands to run.
fn section(title: Text, prose: Text, code: Text) -> Text {
  return el("div", "mb-8",
    el("h2", "text-2xl font-bold mb-2", title) .. prose .. code);
}