#!/bin/bash

# Authelia install hooks — requirements check, config + secrets bootstrap,
# admin account provisioning, and an end-of-install credentials notice.

authelia_install_pre()
{
    local app_name="$1"
    if ! appInstallCheckRequirements "$app_name" "$CFG_AUTHELIA_REQUIRES"; then
        authelia=n
        return 1
    fi
}

authelia_install_post_compose()
{
    local app_name="$1"

    local result
    result=$(copyResource "$app_name" "configuration.yml" "config" | runInstallWrite -a "$logs_dir/$docker_log_file" 2>&1)
    checkSuccess "Copying configuration.yml to $containers_dir$app_name/config"

    result=$(copyResource "$app_name" "users_database.yml" "config" | runInstallWrite -a "$logs_dir/$docker_log_file" 2>&1)
    checkSuccess "Copying users_database.yml to $containers_dir$app_name/config"

    local authelia_config_file="$containers_dir$app_name/config/configuration.yml"
    runFileOp sed -i "s|AUTHELIA_THEME_PLACEHOLDER|$CFG_AUTHELIA_THEME|g" "$authelia_config_file"
    runFileOp sed -i "s|AUTHELIA_DOMAIN_PLACEHOLDER|$domain_full|g" "$authelia_config_file"
    runFileOp sed -i "s|AUTHELIA_HOST_PLACEHOLDER|$host_setup|g" "$authelia_config_file"
    checkSuccess "Substituting Authelia configuration values (theme=$CFG_AUTHELIA_THEME domain=$domain_full host=$host_setup)"

    local authelia_secrets_dir="$containers_dir$app_name/secrets"
    runFileOp mkdir -p "$authelia_secrets_dir"
    local secret_name secret_file
    for secret_name in JWT_SECRET SESSION_SECRET STORAGE_ENCRYPTION_KEY; do
        secret_file="$authelia_secrets_dir/$secret_name"
        if [[ ! -s "$secret_file" ]]; then
            openssl rand -hex 64 | runFileWrite "$secret_file"
            runFileOp chmod 600 "$secret_file"
        fi
    done
    runFileOp chown -R "$docker_install_user":"$docker_install_user" "$authelia_secrets_dir"
    checkSuccess "Generated Authelia secrets at $authelia_secrets_dir"

    # Authelia's metrics block lives in configuration.yml (not the compose),
    # so toggle it here. The driver already toggled docker-compose.yml.
    monitoringToggleAppConfig "$app_name" "config/configuration.yml"
}

authelia_install_post_start()
{
    local app_name="$1"

    ((menu_number++))
    echo ""
    echo "---- $menu_number. Configuring Authelia admin account"
    echo ""

    local authelia_admin_user="${CFG_AUTHELIA_ADMIN_USERNAME:-admin}"
    local authelia_admin_pass="${CFG_AUTHELIA_ADMIN_PASSWORD:-authelia}"
    local authelia_users_file="$containers_dir$app_name/config/users_database.yml"
    local authelia_attempts=0
    while ((authelia_attempts < 30)); do
        if runFileOp docker exec authelia-service authelia --version >/dev/null 2>&1; then
            break
        fi
        sleep 2
        ((authelia_attempts++))
    done

    if ((authelia_attempts >= 30)); then
        isNotice "Authelia container did not become responsive in time — admin left at default (admin / authelia)."
        return 0
    fi

    local authelia_hash
    authelia_hash=$(runFileOp docker exec authelia-service authelia crypto hash generate argon2 --password "$authelia_admin_pass" 2>/dev/null \
        | grep -oE '\$argon2[^[:space:]]+')
    if [[ -z "$authelia_hash" ]]; then
        isNotice "Could not generate Authelia password hash — admin left at default (admin / authelia)."
        return 0
    fi

    runFileWrite "$authelia_users_file" <<EOF
---
users:
  ${authelia_admin_user}:
    disabled: false
    displayname: "Admin"
    password: "${authelia_hash}"
    email: ${authelia_admin_user}@${domain_full:-example.com}
    groups:
      - admins
EOF
    runFileOp chown "$docker_install_user":"$docker_install_user" "$authelia_users_file"
    isSuccessful "Configured Authelia admin (user: $authelia_admin_user)."
    dockerComposeRestart "$app_name"
}

authelia_install_post()
{
    local app_name="$1"
    local authelia_admin_user="${CFG_AUTHELIA_ADMIN_USERNAME:-admin}"
    local authelia_admin_pass="${CFG_AUTHELIA_ADMIN_PASSWORD:-authelia}"
    echo ""
    isNotice "Authelia admin login:"
    echo ""
    echo "      Username : ${authelia_admin_user}"
    echo "      Password : ${authelia_admin_pass}"
    echo ""
}
