"""Build each declared static-content artifact independently."""

import shutil
import subprocess
import tempfile
from pathlib import Path

from utils import EXCLUDE_FILES, env, parse_site_yaml, run, validate_artifact_inputs


def build_artifact(site_dir, artifact):
    html_dir = site_dir / artifact["build_dir"]
    if html_dir.parent.exists():
        shutil.rmtree(html_dir.parent)

    content_dir = artifact["content_dir"]
    src = site_dir / content_dir if content_dir else site_dir
    if not src.exists():
        raise FileNotFoundError(f"artifact {artifact['name']} content_dir not found: {src}")

    if artifact["type"] == "static":
        print(f"Copying artifact {artifact['name']} from {src}")
        with tempfile.TemporaryDirectory() as tmp:
            tmp_path = Path(tmp) / "html"
            shutil.copytree(src, tmp_path, dirs_exist_ok=True)
            for name in EXCLUDE_FILES:
                p = tmp_path / name
                if p.is_dir():
                    shutil.rmtree(p)
                elif p.exists():
                    p.unlink()
            html_dir.parent.mkdir(parents=True)
            shutil.move(str(tmp_path), str(html_dir))

    elif artifact["type"] == "hugo":
        print(f"Building Hugo artifact {artifact['name']} from {src}")
        run(["hugo", "--source", str(src), "--destination", str(html_dir)])

    elif artifact["type"] == "mkdocs":
        print(f"Building MkDocs artifact {artifact['name']} from {src}")
        run(["mkdocs", "build", "-d", str(html_dir)], cwd=src)

    if artifact["tidy"]:
        print("Running tidy on HTML files...")
        for html_file in html_dir.rglob("*.html"):
            subprocess.run(
                ["tidy", "-modify", "-quiet",
                 "--wrap", "0", "--indent", "auto", "--indent-spaces", "2",
                 "--drop-empty-elements", "no", "--tidy-mark", "no",
                 "--show-warnings", "no", str(html_file)],
                check=False,
            )

    if not any(path.is_file() for path in html_dir.rglob("*")):
        raise FileNotFoundError(f"artifact {artifact['name']} produced no files in {html_dir}")
    print(f"Artifact {artifact['name']} complete — content at {html_dir}")


def cmd_build():
    site_dir = Path(env("SITE_DIR"))
    cfg = parse_site_yaml(site_dir)

    if not cfg["enabled"]:
        print("Site disabled — skipping build")
        return

    validate_artifact_inputs(site_dir, cfg)

    for artifact in cfg["artifacts"]:
        build_artifact(site_dir, artifact)