#!/usr/bin/env sh
# selftest.sh – Funktionspruefung fuer copilot-bootstrap.{sh,fish}.
#
# Baut ein isoliertes Fake-Template-Verzeichnis und ein Ziel-Repo in einem
# temporaeren HOME und prueft, dass Bootstrap die erwartete Struktur erzeugt.
# Veraendert weder das echte HOME noch ein echtes Repo. Lokal und in CI nutzbar:
#   sh scripts/selftest.sh
set -eu

REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT

build_template() {
    tpl="$1"
    mkdir -p "$tpl/.github" "$tpl/.vscode" "$tpl/hooks" "$tpl/docs" "$tpl/docs/history/summary"
    # Realistische copilot-instructions.md inkl. Default-Shell-Zeile (Projekt-Sektion)
    printf '# Instr\n\n---\n\n## Entwicklungsumgebung\n\n- **Default-Shell:** fish\n\n## Project\n' \
        > "$tpl/.github/copilot-instructions.md"
    echo '{}' > "$tpl/.vscode/settings.json"
    echo '{}' > "$tpl/.vscode/extensions.json"
    printf '#!/bin/sh\nexit 0\n' > "$tpl/hooks/pre-commit"
    printf '#!/bin/sh\nexit 0\n' > "$tpl/hooks/post-commit"
    for d in USER ADMIN MAINTAINER; do
        echo "$d" > "$tpl/docs/$d.md"
    done
    echo ctx > "$tpl/docs/history/summary/PROJECT_CONTEXT.md"
}

assert_file() {
    if [ ! -f "$1" ]; then
        echo "FAIL: erwartete Datei fehlt: $1" >&2
        exit 1
    fi
}

run_case() {
    label="$1"
    runner="$2"   # sh | fish
    script="$3"
    home="$WORK/home_$label"
    target="$WORK/target_$label"
    mkdir -p "$home/.git-templates" "$target"
    build_template "$home/.git-templates"
    git -C "$target" init -q

    HOME="$home" "$runner" "$REPO_DIR/scripts/$script" "$target" >/dev/null

    assert_file "$target/.github/copilot-instructions.md"
    assert_file "$target/.vscode/settings.json"
    assert_file "$target/.vscode/extensions.json"
    assert_file "$target/docs/USER.md"
    assert_file "$target/docs/ADMIN.md"
    assert_file "$target/docs/MAINTAINER.md"
    assert_file "$target/docs/history/summary/PROJECT_CONTEXT.md"
    assert_file "$target/.git/hooks/pre-commit"
    assert_file "$target/.git/hooks/post-commit"
    assert_file "$target/data/.gitkeep"
    if ! grep -q ':Zone.Identifier' "$target/.gitignore"; then
        echo "FAIL: $label – .gitignore enthaelt kein Zone.Identifier-Muster" >&2
        exit 1
    fi
    if ! grep -q '^- \*\*Default-Shell:\*\*' "$target/.github/copilot-instructions.md"; then
        echo "FAIL: $label – Default-Shell-Zeile fehlt in copilot-instructions.md" >&2
        exit 1
    fi
    echo "PASS: $label ($script)"
}

# Prueft, dass die erkannte $SHELL korrekt in die copilot-instructions.md
# geschrieben wird (deterministisch ueber explizit gesetztes SHELL).
run_shell_case() {
    label="$1"
    runner="$2"
    script="$3"
    shellval="$4"
    expected="$5"
    home="$WORK/home_$label"
    target="$WORK/target_$label"
    mkdir -p "$home/.git-templates" "$target"
    build_template "$home/.git-templates"
    git -C "$target" init -q

    HOME="$home" SHELL="$shellval" "$runner" "$REPO_DIR/scripts/$script" "$target" >/dev/null

    got=$(sed -n 's|^- \*\*Default-Shell:\*\* ||p' "$target/.github/copilot-instructions.md")
    if [ "$got" != "$expected" ]; then
        echo "FAIL: $label – Default-Shell '$got' != erwartet '$expected'" >&2
        exit 1
    fi
    echo "PASS: $label (SHELL='$shellval' → $expected)"
}

run_case sh_bootstrap sh copilot-bootstrap.sh

# Shell-Erkennung: expliziter Wert wird uebernommen, leeres SHELL faellt auf fish zurueck.
run_shell_case sh_shell_zsh   sh copilot-bootstrap.sh /usr/bin/zsh zsh
run_shell_case sh_shell_empty sh copilot-bootstrap.sh ""           fish

if command -v fish >/dev/null 2>&1; then
    run_case fish_bootstrap fish copilot-bootstrap.fish
    run_shell_case fish_shell_zsh   fish copilot-bootstrap.fish /usr/bin/zsh zsh
    run_shell_case fish_shell_empty fish copilot-bootstrap.fish ""           fish
else
    echo "SKIP: fish nicht installiert – fish-Bootstrap uebersprungen"
fi

echo "selftest OK"