install.sh

#!/usr/bin/env bash
#
# Claude Code configuration installer.
# Links this repo's CLAUDE.md, commands/, agents/, skills/, and codex.json into
# ~/.claude/ so Claude Code picks them up. Idempotent and safe to re-run.
#
# Usage:
#   ./install.sh           # Install symlinks
#   ./install.sh --check   # Check status without changes
#
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
CHECK_ONLY=false

[[ "${1:-}" == "--check" ]] && CHECK_ONLY=true

print_info() { echo "[INFO] $1"; }
print_warn() { echo "[WARN] $1"; }
print_ok()   { echo "[OK] $1"; }

# Create symlink idempotently
# Args: $1=target (source file in repo), $2=link path (destination)
ensure_symlink() {
    local target="$1"
    local link="$2"
    local link_name
    link_name="$(basename "$link")"

    if [[ ! -e "$target" ]]; then
        print_warn "$link_name: target does not exist: $target"
        return 1
    fi

    if [[ -L "$link" ]]; then
        local current
        current="$(readlink "$link")"

        local resolved_target
        local resolved_link
        resolved_target="$(python3 -c "import os; print(os.path.realpath('${target}'))" 2>/dev/null || true)"
        resolved_link="$(python3 -c "import os; print(os.path.realpath('${link}'))" 2>/dev/null || true)"

        if [[ "$current" == "$target" || ( -n "$resolved_target" && -n "$resolved_link" && "$resolved_target" == "$resolved_link" ) ]]; then
            print_ok "$link_name: symlink correct"
            return 0
        else
            if [[ "$CHECK_ONLY" == true ]]; then
                print_warn "$link_name: symlink points to wrong target: $current"
                return 1
            fi
            print_info "$link_name: updating symlink..."
            rm "$link"
            ln -s "$target" "$link"
            print_ok "$link_name: symlink updated"
        fi
    elif [[ -e "$link" ]]; then
        if [[ "$CHECK_ONLY" == true ]]; then
            print_warn "$link_name: regular file exists (not a symlink)"
            return 1
        fi
        local backup="${link}.backup.$(date +%Y%m%d%H%M%S)"
        print_warn "$link_name: backing up regular file to $backup"
        mv "$link" "$backup"
        ln -s "$target" "$link"
        print_ok "$link_name: symlink created (old file backed up)"
    else
        if [[ "$CHECK_ONLY" == true ]]; then
            print_warn "$link_name: does not exist"
            return 1
        fi
        ln -s "$target" "$link"
        print_ok "$link_name: symlink created"
    fi
}

remove_legacy_settings_base() {
    local legacy_path="$HOME/.claude/settings.base.json"
    local legacy_name
    legacy_name="$(basename "$legacy_path")"

    if [[ ! -e "$legacy_path" && ! -L "$legacy_path" ]]; then
        return 0
    fi

    if [[ "$CHECK_ONLY" == true ]]; then
        print_warn "$legacy_name: deprecated file exists and should be removed"
        return 1
    fi

    if [[ -L "$legacy_path" ]]; then
        rm "$legacy_path"
        print_ok "$legacy_name: removed deprecated symlink"
        return 0
    fi

    local backup="${legacy_path}.backup.$(date +%Y%m%d%H%M%S)"
    print_warn "$legacy_name: backing up deprecated file to $backup"
    mv "$legacy_path" "$backup"
    print_ok "$legacy_name: removed deprecated file (backup created)"
}

main() {
    echo "Claude Code install.sh"
    echo "Repository: $SCRIPT_DIR"
    echo ""

    # Ensure ~/.claude exists
    mkdir -p "$HOME/.claude"

    # CLAUDE.md - user-level instructions (open-source, editable)
    ensure_symlink "$SCRIPT_DIR/CLAUDE.md" "$HOME/.claude/CLAUDE.md"

    # commands/, agents/, skills/ - assets discoverable by Claude Code
    ensure_symlink "$SCRIPT_DIR/commands" "$HOME/.claude/commands"
    ensure_symlink "$SCRIPT_DIR/agents" "$HOME/.claude/agents"
    ensure_symlink "$SCRIPT_DIR/.claude/skills" "$HOME/.claude/skills"

    # codex.json - Codex CLI config consumed by the codex-reviewer plugin.
    # Prefer a parent dotfiles tree (../codex/codex.json) when present; otherwise
    # fall back to the in-repo sample so standalone installs still work.
    local codex_source="$SCRIPT_DIR/codex.json"
    if [[ -e "$SCRIPT_DIR/../codex/codex.json" ]]; then
        codex_source="$SCRIPT_DIR/../codex/codex.json"
    fi
    ensure_symlink "$codex_source" "$HOME/.claude/codex.json"

    # Legacy compatibility cleanup: baseline now loads directly from repository path.
    remove_legacy_settings_base || true

    # Regenerate runtime settings if merge helper exists.
    if command -v claude-settings-merge >/dev/null 2>&1; then
        claude-settings-merge --fix || print_warn "Failed to regenerate ~/.claude/settings.json"
    fi

    echo ""
    if [[ "$CHECK_ONLY" == true ]]; then
        echo "Check complete. Run without --check to apply changes."
    else
        echo "Done."
    fi
}

main "$@"