/*
Copyright 2026.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"errors"
	"flag"
	"strings"
	"time"

	"git.ddupan.top/panxiao81/postgresql-tenant-operator/internal/openbao"
	bao "github.com/openbao/openbao/api/v2"
)

// dependencyOptions belongs to process startup, never to an Instance.
// Configuration is immutable after assembly; no configuration hot reload is enabled.
type dependencyOptions struct {
	address                 string
	consumerAddress         string
	authMount               string
	authRole                string
	kvMount                 string
	tenantBasePath          string
	externalSecretStoreName string
	postgreSQLCABundlePath  string
	timeout                 time.Duration
}

func (o *dependencyOptions) bindFlags(flags *flag.FlagSet) {
	flags.StringVar(&o.address, "openbao-address", "", "OpenBao API address.")
	flags.StringVar(&o.consumerAddress, "openbao-consumer-address", "", "Consumer OpenBao API address.")
	flags.StringVar(&o.authMount, "openbao-auth-mount", "kubernetes", "OpenBao Kubernetes auth mount.")
	flags.StringVar(&o.authRole, "openbao-auth-role", "", "OpenBao Kubernetes auth role.")
	flags.StringVar(&o.kvMount, "openbao-kv-mount", "kv", "OpenBao KV v2 mount.")
	flags.StringVar(&o.tenantBasePath, "openbao-tenant-base-path", "postgresql-tenants", "Tenant credential prefix.")
	flags.StringVar(&o.externalSecretStoreName, "external-secret-store-name", "", "ESO ClusterSecretStore name.")
	flags.StringVar(&o.postgreSQLCABundlePath, "postgresql-ca-bundle-path", "", "PostgreSQL CA bundle path.")
	flags.DurationVar(&o.timeout, "reconcile-timeout", 30*time.Second, "External operation deadline.")
}

func (o dependencyOptions) credentials() (*openbao.Credentials, error) {
	if o.address == "" || o.authRole == "" || o.authMount == "" || o.kvMount == "" {
		return nil, errors.New("OpenBao address, auth role, auth mount and KV mount are required")
	}
	if o.timeout <= 0 {
		return nil, errors.New("reconcile timeout must be positive")
	}
	// Delegate connection address parsing to the SDK, and avoid implicit BAO_* overrides.
	config := bao.NewConfig()
	config.Address = strings.TrimRight(o.address, "/")
	config.Timeout = o.timeout
	client, err := bao.NewClient(config)
	if err != nil {
		return nil, errors.New("invalid OpenBao client configuration")
	}
	return openbao.NewCredentials(client, o.kvMount, o.authMount, o.authRole), nil
}