#!/bin/sh
# install.sh — symlink session-tools/bin/* into ~/bin (idempotent).
#
# Run this on every host that should have remote-run / tssh available.

set -eu

repo_dir=$(cd "$(dirname "$0")" && pwd)

# Pick the first install target that's already on $PATH so the symlinks are
# immediately usable. Override with TARGET=<dir> ./install.sh.
pick_target() {
    if [ -n "${TARGET:-}" ]; then
        printf %s "$TARGET"
        return
    fi
    for candidate in "$HOME/bin" "$HOME/.local/bin"; do
        case ":$PATH:" in
            *":$candidate:"*) printf %s "$candidate"; return ;;
        esac
    done
    # Nothing on PATH — fall back to ~/bin and warn later.
    printf %s "$HOME/bin"
}

target=$(pick_target)
mkdir -p "$target"

for src in "$repo_dir"/bin/*; do
    name=$(basename "$src")
    link="$target/$name"
    if [ -L "$link" ] && [ "$(readlink "$link")" = "$src" ]; then
        echo "ok:    $link -> $src"
        continue
    fi
    if [ -e "$link" ] && [ ! -L "$link" ]; then
        echo "skip:  $link exists and is not a symlink — leaving alone" >&2
        continue
    fi
    ln -sfn "$src" "$link"
    echo "link:  $link -> $src"
done

# Dependency: `rclaude` drives the `claude` CLI, so claude is a hard dep —
# install it via the official installer if it's missing. Idempotent: skipped
# when claude is already on PATH. (Auth is provisioned separately — login or
# a copied ~/.claude/.credentials.json.)
if command -v claude >/dev/null 2>&1; then
    echo "ok:    claude present ($(claude --version 2>/dev/null | head -1))"
elif command -v curl >/dev/null 2>&1; then
    echo "dep:   claude CLI missing — installing via official installer…"
    if curl -fsSL https://claude.ai/install.sh | bash; then
        echo "ok:    claude installed ($("$HOME/.local/bin/claude" --version 2>/dev/null | head -1))"
    else
        echo "warn:  claude auto-install failed — install it manually" >&2
    fi
else
    echo "warn:  claude missing and curl unavailable — install claude manually" >&2
fi

# Install tmux.conf if tmux is present and the user has no existing config.
if command -v tmux >/dev/null 2>&1; then
    tmux_conf="$HOME/.tmux.conf"
    if [ ! -f "$tmux_conf" ]; then
        cp "$repo_dir/tmux.conf" "$tmux_conf"
        echo "link:  $tmux_conf (installed from repo)"
        tmux source "$tmux_conf" 2>/dev/null && echo "ok:    tmux config reloaded" || true
    else
        echo "ok:    $tmux_conf already exists — not overwriting"
    fi
fi

case ":$PATH:" in
    *":$target:"*) ;;
    *) echo "note:  add $target to PATH if it isn't already" ;;
esac