#!/usr/bin/env sh
# copilot-bootstrap.sh
# Fügt Copilot-Grundkonfiguration zu einem bestehenden oder neu erstellten Repo hinzu.
# POSIX-kompatibel: läuft auf bash, dash, sh – kein fish nötig.
#
# Usage:
#   copilot-bootstrap.sh                        # aktuelles Verzeichnis
#   copilot-bootstrap.sh /path/to/repo          # anderes Verzeichnis
#   copilot-bootstrap.sh --with-update-hook     # + post-merge Hook (auto-update nach git pull)

TEMPLATE_DIR="$HOME/.git-templates"
WITH_UPDATE_HOOK=0
TARGET="."

for arg in "$@"; do
    case "$arg" in
        --with-update-hook) WITH_UPDATE_HOOK=1 ;;
        -*) ;;
        *)  TARGET="$arg" ;;
    esac
done

if [ ! -d "$TARGET/.git" ]; then
    echo "Error: $TARGET is not a git repository" >&2
    exit 1
fi

echo "Bootstrapping Copilot config in: $TARGET"

# .github/copilot-instructions.md
if [ ! -f "$TARGET/.github/copilot-instructions.md" ]; then
    mkdir -p "$TARGET/.github"
    cp "$TEMPLATE_DIR/.github/copilot-instructions.md" "$TARGET/.github/copilot-instructions.md"
    echo "  ✓ .github/copilot-instructions.md created (TODO-Felder ausfüllen)"
else
    echo "  ─ .github/copilot-instructions.md already exists, skipping"
fi

# .vscode/settings.json
if [ ! -f "$TARGET/.vscode/settings.json" ]; then
    mkdir -p "$TARGET/.vscode"
    cp "$TEMPLATE_DIR/.vscode/settings.json" "$TARGET/.vscode/settings.json"
    echo "  ✓ .vscode/settings.json created"
else
    echo "  ─ .vscode/settings.json already exists, skipping"
fi

# .vscode/extensions.json
if [ ! -f "$TARGET/.vscode/extensions.json" ]; then
    mkdir -p "$TARGET/.vscode"
    cp "$TEMPLATE_DIR/.vscode/extensions.json" "$TARGET/.vscode/extensions.json"
    echo "  ✓ .vscode/extensions.json created"
else
    echo "  ─ .vscode/extensions.json already exists, skipping"
fi

# ── data/ – Persistente Service-Daten ────────────────────────────────────────
if [ ! -d "$TARGET/data" ]; then
    mkdir -p "$TARGET/data"
    touch "$TARGET/data/.gitkeep"
    echo "  ✓ data/ created (persistente Service-Daten – gitignored)"
else
    echo "  ─ data/ already exists, skipping"
fi

# ── history/ – Agent-History und Kontext-Summary ─────────────────────────────
if [ ! -d "$TARGET/history/prompts" ]; then
    mkdir -p "$TARGET/history/prompts"
    echo "  ✓ history/prompts/ created (Agent-Logs – committed)"
fi
if [ ! -f "$TARGET/history/summary/PROJECT_CONTEXT.md" ]; then
    mkdir -p "$TARGET/history/summary"
    cp "$TEMPLATE_DIR/history/summary/PROJECT_CONTEXT.md" "$TARGET/history/summary/PROJECT_CONTEXT.md"
    echo "  ✓ history/summary/PROJECT_CONTEXT.md created (Agent-Kontext – committed)"
else
    echo "  ─ history/summary/PROJECT_CONTEXT.md already exists, skipping"
fi

# ── docs/ – Zielgruppen-Dokumentation ────────────────────────────────────────
if [ ! -d "$TARGET/docs" ]; then
    mkdir -p "$TARGET/docs"
    cp "$TEMPLATE_DIR/docs/USER.md"       "$TARGET/docs/USER.md"
    cp "$TEMPLATE_DIR/docs/ADMIN.md"      "$TARGET/docs/ADMIN.md"
    cp "$TEMPLATE_DIR/docs/MAINTAINER.md" "$TARGET/docs/MAINTAINER.md"
    echo "  ✓ docs/ created with USER.md, ADMIN.md, MAINTAINER.md (TODO-Felder ausfüllen)"
else
    # Fehlende Zielgruppen-Docs ergänzen ohne vorhandene zu überschreiben
    for doc in USER ADMIN MAINTAINER; do
        if [ ! -f "$TARGET/docs/${doc}.md" ]; then
            cp "$TEMPLATE_DIR/docs/${doc}.md" "$TARGET/docs/${doc}.md"
            echo "  ✓ docs/${doc}.md created"
        else
            echo "  ─ docs/${doc}.md already exists, skipping"
        fi
    done
fi

# ── Git-Hooks – Quality Gate + History ───────────────────────────────────────
mkdir -p "$TARGET/.git/hooks"
if [ ! -f "$TARGET/.git/hooks/pre-commit" ]; then
    cp "$TEMPLATE_DIR/hooks/pre-commit" "$TARGET/.git/hooks/pre-commit"
    chmod +x "$TARGET/.git/hooks/pre-commit"
    echo "  ✓ .git/hooks/pre-commit installed (Quality Gate: Tests + Docs)"
else
    echo "  ─ .git/hooks/pre-commit already exists, skipping"
fi
if [ ! -f "$TARGET/.git/hooks/post-commit" ] && [ -f "$TEMPLATE_DIR/hooks/post-commit" ]; then
    cp "$TEMPLATE_DIR/hooks/post-commit" "$TARGET/.git/hooks/post-commit"
    chmod +x "$TARGET/.git/hooks/post-commit"
    echo "  ✓ .git/hooks/post-commit installed (Auto-History-Log)"
fi

# ── post-merge Hook – opt-in: automatisches copilot-update nach git pull ──────
if [ "$WITH_UPDATE_HOOK" -eq 1 ]; then
    if [ -f "$TEMPLATE_DIR/hooks/post-merge" ]; then
        if [ ! -f "$TARGET/.git/hooks/post-merge" ]; then
            cp "$TEMPLATE_DIR/hooks/post-merge" "$TARGET/.git/hooks/post-merge"
            chmod +x "$TARGET/.git/hooks/post-merge"
            echo "  ✓ .git/hooks/post-merge installed (Copilot-Update nach git pull)"
        else
            echo "  ─ .git/hooks/post-merge already exists, skipping"
        fi
    fi
fi

# ── .gitignore – data/ ausschließen ─────────────────────────────────────────
GITIGNORE="$TARGET/.gitignore"
GITIGNORE_UPDATED=0

_append_gitignore() {
    if ! grep -qF "$1" "$GITIGNORE" 2>/dev/null; then
        printf '\n%s\n%s\n' "$2" "$1" >> "$GITIGNORE"
        GITIGNORE_UPDATED=1
    fi
}

_append_gitignore "data/**/*"      "# Persistente Service-Daten (nie committen!)"
_append_gitignore "!data/.gitkeep" ""

if [ "$GITIGNORE_UPDATED" -eq 1 ]; then
    echo "  ✓ .gitignore aktualisiert (data/ excluded)"
else
    echo "  ─ .gitignore already has required entries, skipping"
fi

echo ""
echo "Done. Nächste Schritte:"
echo "  1. TODO-Felder ausfüllen:"
echo "     - .github/copilot-instructions.md"
echo "     - history/summary/PROJECT_CONTEXT.md"
echo "     - docs/USER.md, docs/ADMIN.md, docs/MAINTAINER.md"
echo "  2. git add .github .vscode docs history .gitignore"
echo "     git commit -m 'chore: add copilot workspace config'"
echo "  3. Templates aktuell halten: git copilot-update"