package vault

import (
	"context"
	"encoding/json"
	"fmt"
	"golang.org/x/oauth2/clientcredentials"
	"net/http"
	"time"

	"github.com/hashicorp/vault-client-go"
	"github.com/hashicorp/vault-client-go/schema"
	log "github.com/sirupsen/logrus"
)

// GetJWTToken fetches the raw token using client credentials and returns the access token as a string.
func GetJWTToken(clientID string, clientSecret string, tokenURL string) string {
	ctx := context.Background()

	clientCredsConfig := clientcredentials.Config{
		ClientID:     clientID,
		ClientSecret: clientSecret,
		TokenURL:     tokenURL,
	}

	// Fetch the token using the client credentials
	token, err := clientCredsConfig.TokenSource(ctx).Token()
	if err != nil {
		fmt.Printf("Error getting token: %v\n", err)
		return ""
	}
	// Return the raw access token
	return token.AccessToken
}

func VaultWithJWT(ctx context.Context, roles string, jwt string) *vault.Client {

	// prepare a client with the given base address
	client, err := vault.New(
		vault.WithAddress("http://localhost:8200"),
		vault.WithRequestTimeout(30*time.Second),
	)
	if err != nil {
		log.Panic(err)
	}

	request := schema.JwtLoginRequest{
		Jwt:  jwt,
		Role: roles,
	}

	resp, err := client.Auth.JwtLogin(ctx, request)
	if err != nil {
		log.Panic(resp, err)
	}

	err = client.SetToken(resp.Auth.ClientToken)
	if err != nil {
		log.Panic(err)
	}

	return client
}

func VaultWithUserPass(ctx context.Context, username, password string) *vault.Client {

	// prepare a client with the given base address
	client, err := vault.New(
		vault.WithAddress("http://localhost:8200"),
		vault.WithRequestTimeout(30*time.Second),
	)
	if err != nil {
		log.Panic(err)
	}

	client.SetRequestCallbacks(func(req *http.Request) {
		log.Println("REQUEST:", *req.URL)
	})

	request := schema.UserpassLoginRequest{
		Password: password,
	}

	// authenticate with a root token (insecure)

	resp, err := client.Auth.UserpassLogin(ctx, username, request)
	if err != nil {
		log.WithError(err).Panic("Problem logging in with username and password")
	}

	err = client.SetToken(resp.Auth.ClientToken)
	if err != nil {
		log.Panic(err)
	}

	return client
}

func VaultWithToken(token string) *vault.Client {

	// prepare a client with the given base address
	client, err := vault.New(
		vault.WithAddress("http://localhost:8200"),
		vault.WithRequestTimeout(30*time.Second),
	)
	if err != nil {
		log.Panic(err)
	}

	//client.SetRequestCallbacks(func(req *http.Request) {
	//	log.Println("REQUEST:", *req.URL)
	//})

	// authenticate with a root token (insecure)
	if err := client.SetToken(token); err != nil {
		log.Panic(err)
	}

	return client
}

// WritingAPIKeyToVault writes the API key to a Vault using the given secret data.
//
// The function converts the secret data into a map and writes it to the Vault.
// If any error occurs during this process, it returns the error.
//
// Parameters:
//   - ctx: The context for the operation.
//   - client: The Vault client used to perform the write operation.
//   - secretData: The secret data to be written to the Vault.
//
// Returns an error if the operation fails.
func WritingAPIKeyToVault[T SecretDataTypes](ctx context.Context, client *vault.Client, secretData SecretData[T]) error {
	secret, err := SecretToMap(secretData)
	if err != nil {
		return err
	}

	request := schema.KvV2WriteRequest{
		Data: secret,
	}

	_, err = client.Secrets.KvV2Write(ctx, secretData.UserSourceID, request, vault.WithMountPath(secretData.Secret.GetMountPath()))
	if err != nil {
		daaata, _ := json.Marshal(client)
		log.Trace(string(daaata))

		log.WithField("mount_path", secretData.Secret.GetMountPath()).Panic(err)
	}

	return nil
}

// ReadingApiKeyFromVault reads the API key from a Vault and populates the given secret data.
//
// The function reads the data from the Vault, converts it back into the appropriate secret type,
// and assigns it to the provided secret data structure.
// If any error occurs during this process, it returns the error.
//
// Parameters:
//   - ctx: The context for the operation.
//   - client: The Vault client used to perform the read operation.
//   - secretData: A pointer to the secret data structure to be populated with the read data.
//
// Returns an error if the operation fails.
func ReadingApiKeyFromVault[T SecretDataTypes](ctx context.Context, client *vault.Client, secretData *SecretData[T]) error {
	data, err := client.Secrets.KvV2Read(ctx, secretData.UserSourceID, vault.WithMountPath(secretData.Secret.GetMountPath()))
	if err != nil {
		log.Panic(err)
	}

	secret, err := MapToSecret[T](data.Data.Data)
	if err != nil {
		return err
	}
	secretData.Secret = secret

	return nil
}