#!/usr/bin/env sh
# bd-hooks-version: 0.24.2
#
# bd (beads) pre-push hook
#
# This hook prevents pushing stale JSONL by:
# 1. Flushing any pending in-memory changes to JSONL (if bd available)
# 2. Checking for uncommitted changes (staged, unstaged, untracked, deleted)
# 3. Failing the push with clear instructions if changes found
#
# The pre-commit hook already exports changes, but this catches:
# - Changes made between commit and push
# - Pending debounced flushes (5s daemon delay)
#
# Installation:
#   cp examples/git-hooks/pre-push .git/hooks/pre-push
#   chmod +x .git/hooks/pre-push
#
# Or use the install script:
#   examples/git-hooks/install.sh

# Check if we're in a bd workspace
if [ ! -d .beads ]; then
    # Not a bd workspace, nothing to do
    exit 0
fi

# Skip if bd sync is already in progress (GH#532: prevents circular error)
# bd sync sets this env var when pushing from worktree
if [ -n "$BD_SYNC_IN_PROGRESS" ]; then
    exit 0
fi

# Optionally flush pending bd changes so they surface in JSONL
# This prevents the race where a debounced flush lands after the check
if command -v bd >/dev/null 2>&1; then
    bd sync --flush-only >/dev/null 2>&1 || true
fi

# Collect all tracked or existing JSONL files (beads.jsonl, issues.jsonl for backward compat, deletions.jsonl for deletion propagation)
FILES=""
for f in .beads/beads.jsonl .beads/issues.jsonl .beads/deletions.jsonl; do
    # Include file if it exists in working tree OR is tracked by git (even if deleted)
    if git ls-files --error-unmatch "$f" >/dev/null 2>&1 || [ -f "$f" ]; then
        FILES="$FILES $f"
    fi
done

# Check for any uncommitted changes using porcelain status
# This catches: staged, unstaged, untracked, deleted, renamed, and conflicts
if [ -n "$FILES" ]; then
    # shellcheck disable=SC2086
    if [ -n "$(git status --porcelain -- $FILES 2>/dev/null)" ]; then
        echo "❌ Error: Beads JSONL has uncommitted changes" >&2
        echo "" >&2
        echo "You made changes to bd issues between your last commit and this push." >&2
        echo "" >&2

        # Check if bd is available and offer auto-sync
        if command -v bd >/dev/null 2>&1; then
            # Check if we're in an interactive terminal
            if [ -t 0 ]; then
                echo "Would you like to run 'bd sync' now to commit and push these changes? [y/N]" >&2
                read -r response
                case "$response" in
                    [yY][eE][sS]|[yY])
                        echo "" >&2
                        echo "Running: bd sync" >&2
                        if bd sync; then
                            echo "" >&2
                            echo "✓ Sync complete. Continuing with push..." >&2
                            exit 0
                        else
                            echo "" >&2
                            echo "❌ Sync failed. Push aborted." >&2
                            exit 1
                        fi
                        ;;
                    *)
                        echo "" >&2
                        echo "Push aborted. Run 'bd sync' manually when ready:" >&2
                        echo "" >&2
                        echo "  bd sync" >&2
                        echo "  git push" >&2
                        echo "" >&2
                        exit 1
                        ;;
                esac
            else
                # Non-interactive: just show the message
                echo "Run 'bd sync' to commit these changes:" >&2
                echo "" >&2
                echo "  bd sync" >&2
                echo "" >&2
                exit 1
            fi
        else
            # bd not available, fall back to manual git commands
            echo "Please commit the updated JSONL before pushing:" >&2
            echo "" >&2
            # shellcheck disable=SC2086
            echo "  git add $FILES" >&2
            echo '  git commit -m "Update bd JSONL"' >&2
            echo "  git push" >&2
            echo "" >&2
            exit 1
        fi
    fi
fi

exit 0