#!/bin/bash
set -uo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=../../lib/common.sh
source "$HERE/../../lib/common.sh"

if is_debug; then set +e; else set -e; fi

DOTFILES_REPO="${DOTFILES_REPO:-https://git.ku-it.org/yuri/fedora-dots.git}"
CFG_DIR="$HOME/.cfg.git"

step "Personal dotfiles: fedora-dots"
rule

if [[ ! -d "$HOME/.config" ]]; then
    mkdir -p "$HOME/.config"
fi

# --- Install the cfg command, ALWAYS (even if the repo exists already) ---
# The alias lives in ~/.bash_aliases (user-owned, trackable in fedora-dots),
# and ~/.bashrc sources that file. Without this, `cfg` exists only on the
# machine where it was typed by hand (VM-proven: "cfg pull: command not found").
ALIASES_FILE="$HOME/.bash_aliases"
BASHRC="$HOME/.bashrc"

if ! grep -q "alias cfg=" "$ALIASES_FILE" 2>/dev/null; then
    info "Installing cfg alias into ~/.bash_aliases..."
    cat >> "$ALIASES_FILE" <<'EOF'
# cfg: manage the bare dotfiles repo (~/.cfg.git, work tree $HOME)
alias cfg='git --git-dir=$HOME/.cfg.git --work-tree=$HOME'
EOF
fi

if ! grep -q "bash_aliases" "$BASHRC" 2>/dev/null; then
    info "Making ~/.bashrc load ~/.bash_aliases..."
    touch "$BASHRC"
    cat >> "$BASHRC" <<'EOF'

# user aliases
if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases; fi
EOF
fi

if [[ -d "$CFG_DIR" ]]; then
    ok "Dotfiles already set up ($CFG_DIR exists)."
    ok "cfg alias ensured. Open a new shell or run: source ~/.bashrc"
    exit 0
fi

# A bare repo is the storage; $HOME is the work tree. Checkout happens through
# the alias form, never a plain `git checkout` inside $HOME.
info "Cloning dotfiles (bare) into $CFG_DIR..."
# --bare is what makes ~/.cfg.git the storage; the plain clone YuKu first ran
# created a working copy instead and broke the alias (proven the hard way).
git clone --quiet --bare "$DOTFILES_REPO" "$CFG_DIR"

cfg() {
    git --git-dir="$CFG_DIR" --work-tree="$HOME" "$@"
}

# Empty repo (no commits yet): nothing to check out, but leave everything
# configured so the first `cfg add` on this machine just works.
if ! git --git-dir="$CFG_DIR" rev-parse --verify -q HEAD >/dev/null; then
    warn "Dotfiles repo has no commits yet — checkout skipped."
    warn "Add folders on your main machine first; here you can start fresh."
    cfg config status.showUntrackedFiles no
    ok "cfg alias ready: git --git-dir=$CFG_DIR --work-tree=$HOME"
    exit 0
fi

info "Checking dotfiles out into \$HOME..."
# -f on purpose: a fresh machine HAS stock files (e.g. .bashrc); the repo's
# versions win on first setup. Untracked files are never touched.
cfg checkout -f
cfg config status.showUntrackedFiles no

ok "Dotfiles checked out. Tracked paths:"
git --git-dir="$CFG_DIR" ls-tree -r --name-only HEAD | cut -d/ -f1-2 | sort -u | sed 's/^/    /'

info "Suggested shell alias for managing them:"
info "    alias cfg='git --git-dir=$CFG_DIR --work-tree=\$HOME'"