#!/usr/bin/env bash
# Zero-token vault change log.
# Reads the vault's publish history (the mirror subtree in the AgentOS repo) and
# writes it into the vault itself so agents can read it.

VAULT_DIR="/c/Users/fight/Documents/Obsidian Vault"
REPO_DIR="/c/Users/fight/AgentOS"
MIRROR_PATH="memory-systems/agent-os"
LOG_FILE="$VAULT_DIR/03_shared/vault-updates-log.md"

cd "$REPO_DIR" || exit 1

# Refresh from remote first (best-effort; --autostash so a dirty repo can't block it).
git pull --rebase --autostash > /dev/null 2>&1

{
    echo "# Vault Updates Log"
    echo ""
    echo "**Generated:** $(date '+%Y-%m-%d %H:%M') PST"
    echo ""
    echo "---"
    echo ""
    echo "## Last 24 Hours"
    echo ""
    git log --since="24 hours ago" --oneline --no-merges -- "$MIRROR_PATH" 2>/dev/null \
        || echo "No recent commits."
    echo ""
    echo "---"
    echo ""
    echo "## Last 7 Days"
    echo ""
    git log --since="7 days ago" --oneline --no-merges -- "$MIRROR_PATH" 2>/dev/null | head -20
    echo ""
    echo "---"
    echo ""
    echo "## Files Changed (Last 24h)"
    echo ""
    # `HEAD@{24.hours.ago}` fails on a young reflog; derive the list from the log instead.
    # The mirror path prefix is stripped so the list reads as vault-relative paths.
    git log --since="24 hours ago" --name-only --pretty=format: -- "$MIRROR_PATH" 2>/dev/null \
        | sed '/^[[:space:]]*$/d' \
        | sed "s|^$MIRROR_PATH/||" \
        | sort -u
} > "$LOG_FILE"

echo "Vault change log updated: $LOG_FILE"