package magellan

import (
	"context"
	"crypto/x509"
	"encoding/json"
	"fmt"
	"os"
	"time"

	bmclib "github.com/bmc-toolbox/bmclib/v2"
	"github.com/jacobweinstock/registrar"
	_ "github.com/mattn/go-sqlite3"
	_ "github.com/stmcginnis/gofish"
)

const (
	IPMI_PORT    = 623
	SSH_PORT     = 22
	TLS_PORT     = 443
	REDFISH_PORT = 5000
)

type BMCProbeResult struct {
	Host     string `json:"host"`
	Port     int    `json:"port"`
	Protocol string `json:"protocol"`
	State    bool   `json:"state"`
}

// NOTE: ...params were getting too long...
type QueryParams struct {
	Host          string
	Port          int
	User          string
	Pass          string
	Drivers       []string
	Preferred		string
	Timeout       int
	WithSecureTLS bool
	CertPoolFile  string
	Verbose       bool
	IpmitoolPath string
}

func NewClient(l *Logger, q *QueryParams) (*bmclib.Client, error) {
	// NOTE: bmclib.NewClient(host, port, user, pass)
	// ...seems like the `port` params doesn't work like expected depending on interface

	// tr := &http.Transport{
	// 	TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
	// }
	// httpClient := http.Client{
	// 	Transport: tr,
	// }

	// init client
	clientOpts := []bmclib.Option{
		// bmclib.WithSecureTLS(),
		// bmclib.WithHTTPClient(&httpClient),
		// bmclib.WithLogger(),
		// bmclib.WithRedfishHTTPClient(&httpClient),
		bmclib.WithRedfishPort(fmt.Sprint(q.Port)),
		bmclib.WithRedfishUseBasicAuth(true),
		bmclib.WithIpmitoolPort(fmt.Sprint(IPMI_PORT)),
		bmclib.WithIpmitoolPath(q.IpmitoolPath),
	}

	// only work if valid cert is provided
	if q.WithSecureTLS {
		var pool *x509.CertPool
		if q.CertPoolFile != "" {
			pool = x509.NewCertPool()
			data, err := os.ReadFile(q.CertPoolFile)
			if err != nil {
				return nil, fmt.Errorf("could not read cert pool file: %v", err)
			}
			pool.AppendCertsFromPEM(data)
		}
		// a nil pool uses the system certs
		clientOpts = append(clientOpts, bmclib.WithSecureTLS(pool))
	}
	// url := fmt.Sprintf("https://%s:%s@%s", q.User, q.Pass, q.Host)
	url := ""
	// if q.WithSecureTLS {
	// url = "https://"
	// } else {
	// 	url = "http://"
	// }

	if q.User == "" && q.Pass == "" {
		url += fmt.Sprintf("%s:%s@%s", q.User, q.Pass, q.Host)
	} else {
		url += q.Host
	}

	client := bmclib.NewClient(url, q.User, q.Pass, clientOpts...)
	ds := registrar.Drivers{}
	for _, driver := range q.Drivers {
		ds = append(ds, client.Registry.Using(driver)...) // ipmi, gofish, redfish
	}
	client.Registry.Drivers = ds

	return client, nil
}

func QueryMetadata(client *bmclib.Client, l *Logger, q *QueryParams) ([]byte, error) {
	// client, err := NewClient(l, q)

	// open BMC session and update driver registry
	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*time.Duration(q.Timeout))
	client.Registry.FilterForCompatible(ctx)
	err := client.Open(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not open BMC client: %v", err)
	}

	defer client.Close(ctx)

	metadata := client.GetMetadata()
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not get metadata: %v", err)
	}

	// retrieve inventory data
	b, err := json.MarshalIndent(metadata, "", "    ")
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not marshal JSON: %v", err)
	}

	if q.Verbose {
		fmt.Printf("metadata: %v\n", string(b))
	}
	ctxCancel()
	return []byte(b), nil
}

func QueryInventory(client *bmclib.Client, l *Logger, q *QueryParams) ([]byte, error) {
	// discover.ScanAndConnect(url, user, pass, clientOpts)

	// open BMC session and update driver registry
	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*time.Duration(q.Timeout))
	client.Registry.FilterForCompatible(ctx)
	err := client.PreferProvider(q.Preferred).Open(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not open client: %v", err)
	}
	defer client.Close(ctx)

	inventory, err := client.Inventory(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not get inventory: %v", err)
	}

	// retrieve inventory data
	b, err := json.MarshalIndent(inventory, "", "    ")
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not marshal JSON: %v", err)
	}

	if q.Verbose {
		fmt.Printf("inventory: %v\n", string(b))
	}
	ctxCancel()
	return []byte(b), nil
}

func QueryPowerState(client *bmclib.Client, l *Logger, q *QueryParams) ([]byte, error) {
	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*time.Duration(q.Timeout))
	client.Registry.FilterForCompatible(ctx)
	err := client.PreferProvider(q.Preferred).Open(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not open client: %v", err)
	}
	defer client.Close(ctx)

	inventory, err := client.GetPowerState(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not get inventory: %v", err)
	}

	// retrieve inventory data
	b, err := json.MarshalIndent(inventory, "", "    ")
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not marshal JSON: %v", err)
	}

	if q.Verbose {
		fmt.Printf("power state: %v\n", string(b))
	}
	ctxCancel()
	return []byte(b), nil

}

func QueryUsers(client *bmclib.Client, l *Logger, q *QueryParams) ([]byte, error) {
	// discover.ScanAndConnect(url, user, pass, clientOpts)
	// client, err := NewClient(l, q)
	// if err != nil {
	// 	return nil, fmt.Errorf("could not make query: %v", err)
	// }

	// open BMC session and update driver registry
	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*time.Duration(q.Timeout))
	client.Registry.FilterForCompatible(ctx)
	err := client.Open(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not open BMC client: %v", err)
	}

	defer client.Close(ctx)

	users, err := client.ReadUsers(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not get users: %v", err)
	}

	// retrieve inventory data
	b, err := json.MarshalIndent(users, "", "    ")
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not marshal JSON: %v", err)
	}

	// return b, nil
	ctxCancel()
	if q.Verbose {
		fmt.Printf("users: %v\n", string(b))
	}
	return []byte(b), nil
}

func QueryBios(client *bmclib.Client, l *Logger, q *QueryParams) ([]byte, error) {
	// client, err := NewClient(l, q)
	// if err != nil {
	// 	return nil, fmt.Errorf("could not make query: %v", err)
	// }
	b, err := makeRequest(client, client.GetBiosConfiguration, q.Timeout)
	if q.Verbose {
		fmt.Printf("bios: %v\n", string(b))
	}
	return b, err
}

func makeRequest[T interface{}](client *bmclib.Client, fn func(context.Context) (T, error), timeout int) ([]byte, error) {
	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*time.Duration(timeout))
	client.Registry.FilterForCompatible(ctx)
	err := client.Open(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not open client: %v", err)
	}

	defer client.Close(ctx)

	response, err := fn(ctx)
	if err != nil {
		ctxCancel()
		return nil, fmt.Errorf("could not get response: %v", err)
	}

	ctxCancel()
	return makeJson(response)
}

func makeJson(object interface{}) ([]byte, error) {
	b, err := json.MarshalIndent(object, "", "    ")
	if err != nil {
		return nil, fmt.Errorf("could not marshal JSON: %v", err)
	}
	return []byte(b), nil
}