#!/usr/bin/env bash
# md-to-html.sh — Convert Markdown docs to styled HTML with the CyberQueer theme.
#
# Usage:
#   bash docs/md-to-html.sh                 # convert all docs/md/*.md
#   bash docs/md-to-html.sh docs/md/foo.md  # convert one file
#
# Output lands in docs/html/ with the same base name.
# Requires: python3 with the 'markdown' package (python-markdown on Arch).
#   sudo pacman -S python-markdown

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
MD_DIR="$SCRIPT_DIR/md"
HTML_DIR="$SCRIPT_DIR/html"

# ── Preflight ─────────────────────────────────────────────────────────────────
if ! python3 -c "import markdown" 2>/dev/null; then
    echo "python-markdown not found. Installing..."
    sudo pacman -S --noconfirm python-markdown \
        || { echo "Error: please install python-markdown manually."; exit 1; }
fi

mkdir -p "$HTML_DIR"

# ── CyberQueer inline CSS ─────────────────────────────────────────────────────
# Read live palette from colors.conf if available, otherwise use defaults.
_hex() {
    local key="$1" default="$2"
    if [[ -f "$SCRIPT_DIR/../colors.conf" ]]; then
        local v
        v=$(grep -m1 "^${key}=" "$SCRIPT_DIR/../colors.conf" 2>/dev/null | cut -d= -f2 | tr -d '[:space:]' | sed 's/#.*//')
        [[ -n "$v" ]] && { printf '#%s' "${v^^}"; return; }
    fi
    printf '#%s' "$default"
}

C_BG=$(_hex COLOR_BG       1A1A1A)
C_TEXT=$(_hex COLOR_TEXT    D6ABAB)
C_HI=$(_hex COLOR_HIGHLIGHT E40046)
C_VIO=$(_hex COLOR_DARK     5018DD)
C_RED=$(_hex COLOR_RED      F50505)

# Derived
C_BG2="#242424"
C_BG3="#2e2e2e"
C_BORDER="${C_VIO}"

CSS="
/* ── CyberQueer Theme ──────────────────────────────────────────────── */
:root {
  --bg:      ${C_BG};
  --bg2:     ${C_BG2};
  --bg3:     ${C_BG3};
  --text:    ${C_TEXT};
  --accent:  ${C_HI};
  --violet:  ${C_VIO};
  --danger:  ${C_RED};
  --border:  ${C_BORDER};
  --radius:  10px;
  --radius-sm: 5px;
}

/* ── Reset & Base ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Agave Nerd Font Mono', 'JetBrains Mono', 'Fira Code',
               'Cascadia Code', 'Source Code Pro', monospace;
  font-size: 15px;
  line-height: 1.75;
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
}

/* ── Typography ────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Agave Nerd Font Mono', monospace;
  font-weight: 700;
  line-height: 1.25;
  margin-top: 2.2rem;
  margin-bottom: 0.6rem;
}

h1 {
  color: var(--accent);
  font-size: 2.2rem;
  border-bottom: 3px solid var(--accent);
  padding-bottom: 0.4rem;
  margin-top: 0;
}

h2 {
  color: var(--accent);
  font-size: 1.55rem;
  border-bottom: 2px solid var(--violet);
  padding-bottom: 0.3rem;
}

h3 {
  color: var(--violet);
  font-size: 1.2rem;
}

h4, h5, h6 {
  color: var(--text);
  font-size: 1rem;
}

p {
  margin: 0.9rem 0;
}

strong { color: var(--accent); font-weight: 700; }
em     { color: var(--violet); font-style: italic; }

/* ── Links ─────────────────────────────────────────────────────────── */
a {
  color: var(--violet);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Code ──────────────────────────────────────────────────────────── */
code {
  font-family: inherit;
  background: var(--bg2);
  color: var(--violet);
  border: 1px solid var(--violet);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.42em;
  font-size: 0.9em;
}

pre {
  background: var(--bg2);
  border: 2px solid var(--violet);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  overflow-x: auto;
  margin: 1.2rem 0;
  position: relative;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 0.875em;
  line-height: 1.6;
}

/* Syntax-like token colouring (no JS required — structural only) */
pre code .kw  { color: var(--accent); }
pre code .str { color: var(--violet); }
pre code .cm  { color: #666; font-style: italic; }

/* ── Horizontal Rule ───────────────────────────────────────────────── */
hr {
  border: none;
  border-top: 2px solid var(--violet);
  margin: 2rem 0;
  opacity: 0.45;
}

/* ── Blockquote ────────────────────────────────────────────────────── */
blockquote {
  border-left: 4px solid var(--accent);
  background: var(--bg2);
  margin: 1.2rem 0;
  padding: 0.8rem 1.2rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text);
  opacity: 0.9;
}

blockquote p { margin: 0; }

/* ── Tables ────────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.2rem 0;
  font-size: 0.9em;
}

th {
  background: var(--violet);
  color: var(--bg);
  text-align: left;
  padding: 0.55rem 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

td {
  padding: 0.5rem 0.9rem;
  border-top: 1px solid var(--bg3);
  vertical-align: top;
}

tr:nth-child(even) td { background: var(--bg2); }
tr:hover td           { background: var(--bg3); }

/* ── Lists ─────────────────────────────────────────────────────────── */
ul, ol {
  padding-left: 1.6rem;
  margin: 0.7rem 0;
}

li { margin: 0.25rem 0; }

ul li::marker { color: var(--accent); }
ol li::marker { color: var(--violet); font-weight: 700; }

/* ── Nav sidebar (index page) ──────────────────────────────────────── */
nav ul {
  list-style: none;
  padding: 0;
}

nav li { margin: 0.3rem 0; }

/* ── Page Header Bar ───────────────────────────────────────────────── */
.page-header {
  border-bottom: 3px solid var(--accent);
  padding-bottom: 0.6rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.page-header .site-title {
  color: var(--accent);
  font-size: 0.85rem;
  opacity: 0.75;
  white-space: nowrap;
}

/* ── Back link ─────────────────────────────────────────────────────── */
.back-link {
  display: inline-block;
  color: var(--violet);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--violet);
  border-radius: 30px;
  transition: background 0.15s, color 0.15s;
}

.back-link:hover {
  background: var(--violet);
  color: var(--bg);
  border-bottom-color: transparent;
}

/* ── Footer ────────────────────────────────────────────────────────── */
footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--bg3);
  color: var(--text);
  opacity: 0.4;
  font-size: 0.8rem;
  text-align: center;
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 680px) {
  body { padding: 1.2rem 1rem 3rem; font-size: 14px; }
  h1   { font-size: 1.7rem; }
  h2   { font-size: 1.3rem; }
  table { display: block; overflow-x: auto; }
}

/* ── Selection ─────────────────────────────────────────────────────── */
::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--violet); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }
"

# ── HTML template ─────────────────────────────────────────────────────────────
render_html() {
    local title="$1"
    local body_html="$2"
    local is_index="$3"   # "true" or "false"

    local back_link=""
    if [[ "$is_index" == "false" ]]; then
        back_link='<a class="back-link" href="index.html">← Index</a>'
    fi

    cat <<HTML
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>${title} — M-Archy Dotfiles</title>
  <style>${CSS}</style>
</head>
<body>
  <header class="page-header">
    <span class="site-title">M-Archy Dotfiles</span>
  </header>
  ${back_link}
  <main>
${body_html}
  </main>
  <footer>
    Generated by md-to-html.sh &nbsp;·&nbsp; CyberQueer theme &nbsp;·&nbsp; $(date '+%Y-%m-%d')
  </footer>
</body>
</html>
HTML
}

# ── Python converter ──────────────────────────────────────────────────────────
convert_file() {
    local src="$1"
    local base; base="$(basename "$src" .md)"
    local dest="$HTML_DIR/${base}.html"
    local is_index="false"
    [[ "$base" == "index" ]] && is_index="true"

    # Extract title from first H1 in the markdown
    local title
    title=$(grep -m1 '^# ' "$src" | sed 's/^# //' || echo "$base")

    # Convert markdown → HTML body via python-markdown
    local body_html
    body_html=$(python3 - "$src" <<'PYEOF'
import sys, markdown

with open(sys.argv[1], encoding="utf-8") as fh:
    text = fh.read()

extensions = [
    "tables",
    "fenced_code",
    "toc",
    "attr_list",
    "def_list",
    "abbr",
    "meta",
]

md = markdown.Markdown(extensions=extensions, extension_configs={
    "toc": {"permalink": True, "permalink_class": "toc-anchor"},
})

print(md.convert(text))
PYEOF
)

    render_html "$title" "$body_html" "$is_index" > "$dest"
    printf "  %-40s → %s\n" "$(basename "$src")" "$(basename "$dest")"
}

# ── Main ──────────────────────────────────────────────────────────────────────
if [[ $# -gt 0 ]]; then
    # Explicit file list
    for f in "$@"; do
        [[ -f "$f" ]] || { echo "Not found: $f" >&2; continue; }
        convert_file "$f"
    done
else
    # All markdown files in docs/md/
    shopt -s nullglob
    files=("$MD_DIR"/*.md)
    if [[ ${#files[@]} -eq 0 ]]; then
        echo "No .md files found in $MD_DIR"
        exit 0
    fi
    echo "Converting ${#files[@]} files → $HTML_DIR/"
    for f in "${files[@]}"; do
        convert_file "$f"
    done
fi

echo
echo "Done. Open docs/html/index.html in a browser."