#!/bin/bash
# Commit and push cognitive memory changes to Gitea.
#
# Syncs the default graph and any named graphs whose directory is a git repo.
# Called daily by cognitive-memory-daily.service after decay/core runs.
# Safe to run multiple times — only commits when there are actual changes.
#
# Default graph:  COGNITIVE_MEMORY_DIR > XDG_DATA_HOME > ~/.local/share/cognitive-memory
# Named graphs:   ~/.local/share/cognitive-memory-graphs/<name>/  (any with .git/)
#
# Location: ~/.claude/skills/cognitive-memory/scripts/memory-git-sync.sh

set -uo pipefail
# Note: -e intentionally omitted at the top level so that one graph's failure
# does not prevent the remaining graphs from being synced.  Each function call
# is checked explicitly.

# ── resolve directories ────────────────────────────────────────────────────────

MEMORY_DIR="${COGNITIVE_MEMORY_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/cognitive-memory}"

# Named graphs live in a sibling directory: cognitive-memory-graphs/<name>/
GRAPHS_BASE_DIR="${MEMORY_DIR%cognitive-memory}cognitive-memory-graphs"

# ── sync function ──────────────────────────────────────────────────────────────
# sync_repo <dir> <label>
#   Commits and pushes any pending changes in the given git repo directory.
#   Returns 0 on success or "nothing to commit", non-zero on error.
sync_repo() {
    local dir="$1"
    local label="$2"

    # Directory must exist and be a git repo
    if [ ! -d "$dir/.git" ]; then
        echo "memory-git-sync [$label]: not a git repo, skipping"
        return 0
    fi

    (
        # Run everything inside a subshell so cd is scoped and set -e is safe
        set -euo pipefail
        cd "$dir"

        # Nothing to commit?
        if git diff --quiet && git diff --cached --quiet \
           && [ -z "$(git ls-files --others --exclude-standard)" ]; then
            echo "memory-git-sync [$label]: no changes to commit"
            exit 0
        fi

        # Stage all changes (.gitignore handles exclusions)
        git add -A

        # Build a descriptive commit message
        ADDED=$(git diff --cached --name-only --diff-filter=A | wc -l)
        MODIFIED=$(git diff --cached --name-only --diff-filter=M | wc -l)
        DELETED=$(git diff --cached --name-only --diff-filter=D | wc -l)
        EDGES=$(git diff --cached --name-only --diff-filter=ACM | grep -c '^graph/edges/' || true)

        MSG="daily sync: ${ADDED} added, ${MODIFIED} modified, ${DELETED} deleted"
        if [ "$EDGES" -gt 0 ]; then
            MSG="$MSG (${EDGES} edges)"
        fi

        git commit -m "$MSG" --no-gpg-sign 2>/dev/null || {
            echo "memory-git-sync [$label]: commit failed (pre-commit hook?)"
            exit 1
        }

        git push origin main 2>/dev/null || {
            echo "memory-git-sync [$label]: push failed"
            exit 1
        }

        echo "memory-git-sync [$label]: pushed to origin/main"
    )
}

# ── sync default graph ─────────────────────────────────────────────────────────

ERRORS=0

sync_repo "$MEMORY_DIR" "default" || ERRORS=$((ERRORS + 1))

# ── sync named graphs ──────────────────────────────────────────────────────────
# Iterate subdirectories of GRAPHS_BASE_DIR; skip non-git directories silently.

if [ -d "$GRAPHS_BASE_DIR" ]; then
    for graph_dir in "$GRAPHS_BASE_DIR"/*/; do
        # glob may yield literal "*/'" if directory is empty
        [ -d "$graph_dir" ] || continue

        graph_name="$(basename "$graph_dir")"
        sync_repo "$graph_dir" "$graph_name" || ERRORS=$((ERRORS + 1))
    done
fi

# ── exit status ───────────────────────────────────────────────────────────────

if [ "$ERRORS" -gt 0 ]; then
    echo "memory-git-sync: completed with $ERRORS error(s)"
    exit 1
fi