#!/usr/bin/env python3
"""Build static documentation site into ./site for zapier.georgelambert.org."""

from __future__ import annotations

import shutil
import subprocess
from datetime import datetime, timezone
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
SITE = ROOT / "site"

SECTIONS = [
    (
        "Start here",
        [
            ("README.md", "Workspace README"),
            ("docs/04-activate/SETUP-ZAPIER-DEVELOPER.html", "Zapier developer setup (HTML)"),
            ("docs/04-activate/SETUP-ZAPIER-DEVELOPER.pdf", "Zapier developer setup (PDF)"),
            ("docs/OPEN.md", "Still open"),
            ("TODO.md", "Implementation TODO / gates"),
        ],
    ),
    (
        "Architecture",
        [
            ("docs/02-architecture/composition.md", "Zappier + middleware composition"),
            ("docs/02-architecture/overview.md", "Middleware overview"),
            ("docs/02-architecture/nats-gateway.md", "NATS on NS1"),
            ("docs/02-architecture/nats-subjects.md", "NATS subjects"),
            ("docs/02-architecture/archive-nats.md", "Archive NATS, bloom, multi-receipt"),
            ("docs/02-architecture/modules-and-nats.md", "Module catalog and NATS addresses"),
        ],
    ),
    (
        "Product",
        [
            ("docs/01-product/features-a-m.md", "Features a–m"),
            ("docs/01-product/api-gap-analysis.md", "Verae OpenAPI gaps"),
            ("docs/01-product/billing-and-keys.md", "Billing and API keys"),
            ("docs/00-sources/workspace-brief.md", "Original brief"),
            ("docs/00-sources/provenance.md", "Provenance"),
        ],
    ),
    (
        "API specs",
        [
            ("docs/api/middleware-openapi.yaml", "Middleware OpenAPI"),
            ("packages/zappier/openapi.yaml", "Zappier OpenAPI"),
            ("docs/00-sources/veraetime-openapi.yaml", "Verae Timestamping OpenAPI snapshot"),
        ],
    ),
]


def rel(p: Path) -> str:
    return p.relative_to(ROOT).as_posix()


def copy_tree(src: Path, dest: Path, ignore=None) -> None:
    if not src.exists():
        return
    dest.parent.mkdir(parents=True, exist_ok=True)
    if src.is_file():
        shutil.copy2(src, dest)
        return
    shutil.copytree(src, dest, dirs_exist_ok=True, ignore=ignore)


def pandoc_md(src: Path, dest: Path, title: str) -> None:
    dest.parent.mkdir(parents=True, exist_ok=True)
    css = """
      body{font:16px/1.5 Georgia,serif;max-width:48rem;margin:2rem auto;padding:0 1rem;color:#122}
      a{color:#0b4f8a} code,pre{font-family:ui-monospace,Menlo,monospace;font-size:0.88rem}
      pre{background:#1b2833;color:#eef;padding:0.8rem;overflow:auto}
      table{border-collapse:collapse} td,th{border:1px solid #ccc;padding:0.35rem 0.5rem}
      nav{font:14px system-ui;margin-bottom:1.5rem}
    """
    header = dest.with_suffix(".hdr.html")
    header.write_text(
        f"<nav><a href=\"/\">zapier.georgelambert.org</a></nav>\n<style>{css}</style>\n",
        encoding="utf-8",
    )
    subprocess.run(
        [
            "pandoc",
            str(src),
            "-o",
            str(dest),
            "--standalone",
            f"--metadata=title={title}",
            f"--include-in-header={header}",
        ],
        check=False,
        capture_output=True,
    )
    header.unlink(missing_ok=True)


def walk_md_pdf(prefix: Path) -> list[tuple[str, str]]:
    items = []
    if not prefix.exists():
        return items
    for p in sorted(prefix.rglob("*")):
        if p.suffix.lower() in {".md", ".pdf", ".html", ".yaml", ".yml", ".svg"} and p.is_file():
            items.append((rel(p), p.name))
    return items


def main() -> None:
    if SITE.exists():
        shutil.rmtree(SITE)
    SITE.mkdir()

    copy_tree(ROOT / "docs", SITE / "docs", ignore=shutil.ignore_patterns("_build", ".DS_Store"))
    sphinx = ROOT / "docs" / "sphinx" / "_build" / "html"
    if sphinx.exists():
        copy_tree(sphinx, SITE / "sphinx")
    for pkg in ("verae-activate", "verae-zapier", "verae-zapier-middleware", "zappier"):
        readme = ROOT / "packages" / pkg / "README.md"
        if readme.exists():
            copy_tree(readme, SITE / "packages" / pkg / "README.md")
    zdocs = ROOT / "packages" / "zappier" / "docs"
    if zdocs.exists():
        copy_tree(zdocs, SITE / "packages" / "zappier" / "docs", ignore=shutil.ignore_patterns("screenshots", "walkthrough", "superpowers"))
    for name in ("README.md", "TODO.md", "OPEN.md"):
        src = ROOT / name
        if not src.exists() and name == "OPEN.md":
            src = ROOT / "docs" / "OPEN.md"
        if src.exists():
            copy_tree(src, SITE / src.name if src.parent == ROOT else SITE / "docs" / "OPEN.md")
    copy_tree(ROOT / "docs" / "WORK-LOG.md", SITE / "docs" / "WORK-LOG.md")
    copy_tree(ROOT / "packages" / "docs-master", SITE / "docs-master")

    # research markdown + diagrams only
    r = ROOT / "research" / "zapier"
    if r.exists():
        for fname in (
            "README.md",
            "getting-started.md",
            "PLATFORM-REFERENCE.md",
            "FUNCTIONS-REFERENCE.md",
            "MCP-REFERENCE.md",
            "LOGIN.md",
            "docs/zapier-billing.md",
        ):
            p = r / fname
            if p.exists():
                copy_tree(p, SITE / "research" / fname)
        diagrams = r / "docs" / "diagrams"
        if diagrams.exists():
            copy_tree(diagrams, SITE / "research" / "docs" / "diagrams")

    # HTML versions of markdown for the catalog entries
    html_pairs = []
    for _title, links in SECTIONS:
        for path, label in links:
            src = ROOT / path
            if src.suffix == ".md" and src.exists():
                dest = SITE / Path(path).with_suffix(".html")
                pandoc_md(src, dest, label)
                html_pairs.append((path, dest.relative_to(SITE).as_posix(), label))

    now = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M UTC")
    cards = []
    for title, links in SECTIONS:
        lis = []
        for path, label in links:
            src = ROOT / path
            if not src.exists() and path == "OPEN.md":
                src = ROOT / "docs" / "OPEN.md"
                path = "docs/OPEN.md"
            if not src.exists():
                continue
            href = path
            html = Path(path).with_suffix(".html").as_posix()
            if src.suffix == ".md" and (SITE / html).exists():
                href = html
            lis.append(f'<li><a href="{href}">{label}</a> <span class="path">{path}</span></li>')
        cards.append(f"<section><h2>{title}</h2><ul>{''.join(lis)}</ul></section>")

    extra = [
        ("docs/modules/README.md", "Module API sheets"),
        ("docs/models/README.md", "Data models"),
        ("sphinx/index.html", "Sphinx HTML"),
        ("docs/04-activate/SETUP-ZAPIER-DEVELOPER.html", "Setup HTML"),
    ]
    extra_lis = "".join(
        f'<li><a href="{h}">{lab}</a></li>' for h, lab in extra if (SITE / h).exists() or h.startswith("sphinx")
    )

    index = f"""<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8"/>
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <title>Verae Time × Zapier documentation</title>
  <style>
    :root {{ --ink:#12202c; --muted:#52646f; --line:#d5dee4; --bg:#f6f3ee; --accent:#0f6e56; }}
    body {{ margin:0; font:16px/1.5 Georgia, serif; color:var(--ink); background:var(--bg); }}
    header {{ background:var(--ink); color:#f6f3ee; padding:2rem 1.5rem; }}
    header p {{ max-width:44rem; color:#d9e2e8; }}
    .kicker {{ letter-spacing:.12em; text-transform:uppercase; font:700 11px system-ui; opacity:.75; }}
    main {{ max-width:52rem; margin:0 auto; padding:1.5rem 1.25rem 3rem; }}
    h1 {{ margin:.4rem 0 .6rem; font-size:1.85rem; }}
    h2 {{ border-top:1px solid var(--line); padding-top:.8rem; margin-top:1.8rem; }}
    ul {{ padding-left:1.2rem; }}
    li {{ margin:.35rem 0; }}
    a {{ color:#0b4f8a; }}
    .path {{ color:var(--muted); font:12px ui-monospace, Menlo, monospace; margin-left:.4rem; }}
    input {{ width:100%; padding:.55rem .7rem; font:16px system-ui; border:1px solid var(--line); border-radius:6px; }}
  </style>
</head>
<body>
<header>
  <div class="kicker">zapier.georgelambert.org</div>
  <h1>Verae Time × Zapier documentation</h1>
  <p>Project reference: setup checklist, architecture (including NATS job wait and WORM archive fan-out), module API sheets, models, OpenAPI, and research notes. Generated {now}.</p>
</header>
<main>
  <p><input id="q" type="search" placeholder="Filter links…" /></p>
  {''.join(cards)}
  <section>
    <h2>Catalogs</h2>
    <ul>{extra_lis}
      <li><a href="docs/modules/">All module markdown</a></li>
      <li><a href="docs/models/">All model markdown</a></li>
      <li><a href="docs/modules-pdf/">Module PDFs</a></li>
      <li><a href="docs/models-pdf/">Model PDFs</a></li>
    </ul>
  </section>
</main>
<script>
const q = document.getElementById('q');
q.addEventListener('input', () => {{
  const v = q.value.toLowerCase();
  document.querySelectorAll('li').forEach(li => {{
    li.style.display = li.textContent.toLowerCase().includes(v) ? '' : 'none';
  }});
}});
</script>
</body>
</html>
"""
    (SITE / "index.html").write_text(index, encoding="utf-8")
    print(f"site built at {SITE} ({sum(1 for _ in SITE.rglob('*') if _.is_file())} files)")


if __name__ == "__main__":
    main()