BEGIN {
    state = "start"
    invalid = 0
    output_count = 0

    if (target != "ca-redis-lab") {
        invalid = 1
    }
}

function remember(line) {
    output[++output_count] = line
}

function is_credential_line(line, prefix, value) {
    if (index(line, prefix) != 1) {
        return 0
    }
    value = substr(line, length(prefix) + 1)
    return value ~ /^[A-Za-z0-9+\/=_-]+$/
}

function is_namespace_line(line, value) {
    if (index(line, "    namespace: ") != 1) {
        return 0
    }
    value = substr(line, length("    namespace: ") + 1)
    return value ~ /^[a-z0-9]([-a-z0-9]*[a-z0-9])?$/
}

{
    if (invalid) {
        next
    }
    if (index($0, "\t") != 0 || index($0, "\r") != 0 ||
        $0 ~ /^[[:space:]]*(---|\.\.\.)([[:space:]]|$)/) {
        invalid = 1
        next
    }
    if ($0 != "preferences: {}" &&
        (index($0, "{") != 0 || index($0, "}") != 0 ||
         index($0, "[") != 0 || index($0, "]") != 0)) {
        invalid = 1
        next
    }

    if (state == "start" && $0 == "apiVersion: v1") {
        api_version_count += 1
        state = "apiVersion"
        remember($0)
        next
    }
    if (state == "apiVersion" && $0 == "clusters:") {
        clusters_count += 1
        state = "clusters"
        remember($0)
        next
    }
    if (state == "clusters" && $0 == "- cluster:") {
        cluster_item_count += 1
        state = "cluster-item"
        remember($0)
        next
    }
    if (state == "cluster-item" &&
        is_credential_line($0, "    certificate-authority-data: ")) {
        ca_data_count += 1
        state = "ca-data"
        remember($0)
        next
    }
    if (state == "ca-data" &&
        $0 == "    server: https://127.0.0.1:6443") {
        server_count += 1
        state = "server"
        remember("    server: https://" address ":6443")
        next
    }
    if (state == "server" && $0 == "  name: default") {
        cluster_name_count += 1
        state = "cluster-name"
        remember("  name: " target)
        next
    }
    if (state == "cluster-name" && $0 == "contexts:") {
        contexts_count += 1
        state = "contexts"
        remember($0)
        next
    }
    if (state == "contexts" && $0 == "- context:") {
        context_item_count += 1
        state = "context-item"
        remember($0)
        next
    }
    if (state == "context-item" && $0 == "    cluster: default") {
        context_cluster_count += 1
        state = "context-cluster"
        remember("    cluster: " target)
        next
    }
    if (state == "context-cluster" && is_namespace_line($0)) {
        namespace_count += 1
        state = "optional-namespace"
        remember($0)
        next
    }
    if ((state == "context-cluster" || state == "optional-namespace") &&
        $0 == "    user: default") {
        context_user_count += 1
        state = "context-user"
        remember("    user: " target)
        next
    }
    if (state == "context-user" && $0 == "  name: default") {
        context_name_count += 1
        state = "context-name"
        remember("  name: " target)
        next
    }
    if (state == "context-name" && $0 == "current-context: default") {
        current_context_count += 1
        state = "current-context"
        remember("current-context: " target)
        next
    }
    if (state == "current-context" && $0 == "kind: Config") {
        kind_count += 1
        state = "kind"
        remember($0)
        next
    }
    if (state == "kind" && $0 == "preferences: {}") {
        preferences_count += 1
        state = "preferences"
        remember($0)
        next
    }
    if (state == "preferences" && $0 == "users:") {
        users_count += 1
        state = "users"
        remember($0)
        next
    }
    if (state == "users" && $0 == "- name: default") {
        user_name_count += 1
        state = "user-name"
        remember("- name: " target)
        next
    }
    if (state == "user-name" && $0 == "  user:") {
        user_body_count += 1
        state = "user-body"
        remember($0)
        next
    }
    if (state == "user-body" &&
        is_credential_line($0, "    client-certificate-data: ")) {
        client_cert_count += 1
        state = "client-cert"
        remember($0)
        next
    }
    if (state == "client-cert" &&
        is_credential_line($0, "    client-key-data: ")) {
        client_key_count += 1
        state = "client-key"
        remember($0)
        next
    }

    invalid = 1
}

END {
    if (invalid || state != "client-key" ||
        api_version_count != 1 || clusters_count != 1 ||
        cluster_item_count != 1 || ca_data_count != 1 ||
        server_count != 1 || cluster_name_count != 1 ||
        contexts_count != 1 || context_item_count != 1 ||
        context_cluster_count != 1 || namespace_count > 1 ||
        context_user_count != 1 || context_name_count != 1 ||
        current_context_count != 1 || kind_count != 1 ||
        preferences_count != 1 || users_count != 1 ||
        user_name_count != 1 || user_body_count != 1 ||
        client_cert_count != 1 || client_key_count != 1) {
        exit 1
    }

    for (line_number = 1; line_number <= output_count; line_number += 1) {
        print output[line_number]
    }
}