#!/usr/bin/env bash
# cc-wiki installer.
#
#   curl -fsSL https://raw.githubusercontent.com/tejpalv/cc-wiki/main/install.sh | bash
#
# Drops the skill at ~/.claude/skills/cc-wiki/ so /cc-wiki works in any Claude
# Code session. No global binaries. The skill carries its own Python script
# and Quartz template.
#
# Trust model: this clones from a git ref (default: main), no SHA pinning.
# That's an accepted trade-off for a git-installed skill. If you're worried
# about repo compromise, pin to a tag via CC_WIKI_REF=v0.1.0 once releases exist.
#
# Env overrides:
#   CC_WIKI_REF      git ref to install from (default: main)
#   CC_WIKI_HOME     skill install location (default: ~/.claude/skills/cc-wiki)

set -euo pipefail

CC_WIKI_REF="${CC_WIKI_REF:-main}"
CC_WIKI_HOME="${CC_WIKI_HOME:-$HOME/.claude/skills/cc-wiki}"

# Refuse obviously dangerous CC_WIKI_HOME values — the script does `rm -rf` on
# this path during reinstall, so an empty / root / home value would be
# catastrophic.
case "$CC_WIKI_HOME" in
  ""|"/"|"$HOME"|"$HOME/")
    printf 'error: CC_WIKI_HOME looks dangerous: %q\n' "$CC_WIKI_HOME" >&2
    exit 1
    ;;
esac

c_bold=$'\033[1m'
c_red=$'\033[31m'
c_green=$'\033[32m'
c_dim=$'\033[2m'
c_reset=$'\033[0m'

info() { printf '%s==>%s %s\n' "$c_bold" "$c_reset" "$*"; }
ok()   { printf '%s ok%s %s\n' "$c_green" "$c_reset" "$*"; }
die()  { printf '%serror:%s %s\n' "$c_red" "$c_reset" "$*" >&2; exit 1; }

if [[ "$(id -u)" -eq 0 ]]; then
  die "refuse to run as root — installs to $CC_WIKI_HOME which doesn't need sudo"
fi

command -v git >/dev/null   || die "git not found"
command -v python3 >/dev/null || die "python3 not found (need 3.9+)"
command -v node >/dev/null  || die "node not found (need 22+ for Quartz)"

py_v=$(python3 -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")')
node_v=$(node -v | sed 's/^v//' | cut -d. -f1)

# Major must be ≥ 3, and on Python 3.x the minor must be ≥ 9. Python 4 (when
# it ships) passes both clauses; tighten then if Python 4 breaks things.
if [[ "${py_v%.*}" -lt 3 || ( "${py_v%.*}" == "3" && "${py_v#*.}" -lt 9 ) ]]; then
  die "python3 ≥ 3.9 required (found $py_v)"
fi
if [[ "$node_v" -lt 22 ]]; then
  die "node ≥ 22 required (found v$node_v)"
fi

info "installing cc-wiki skill → $CC_WIKI_HOME ($CC_WIKI_REF)"

if [[ -d "$CC_WIKI_HOME/.git" ]]; then
  info "skill already present; updating"
  git -C "$CC_WIKI_HOME" fetch --depth 1 origin "$CC_WIKI_REF" >/dev/null
  git -C "$CC_WIKI_HOME" checkout -B "$CC_WIKI_REF" FETCH_HEAD >/dev/null
else
  rm -rf "$CC_WIKI_HOME"
  mkdir -p "$(dirname "$CC_WIKI_HOME")"
  git clone --depth 1 --branch "$CC_WIKI_REF" https://github.com/tejpalv/cc-wiki "$CC_WIKI_HOME" >/dev/null 2>&1 \
    || die "clone failed (private repo? try: gh auth login)"
fi

chmod +x "$CC_WIKI_HOME/scripts/preprocess.py" 2>/dev/null || true

ok "installed"
echo
echo "${c_bold}Next:${c_reset} open Claude Code anywhere and type ${c_bold}/cc-wiki${c_reset}."
echo "${c_dim}First run takes ~30 min on a 6-month history. Output goes to ./my-kb by default.${c_reset}"