package xes

import (
	"bytes"
	"context"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"github.com/loveuer/esgo2dump/log"
	"github.com/loveuer/esgo2dump/model"
	"github.com/loveuer/esgo2dump/xes/es6"
	"net"
	"net/http"
	"net/url"
	"strings"
	"time"

	elastic "github.com/elastic/go-elasticsearch/v6"
	"github.com/elastic/go-elasticsearch/v6/esapi"
	"github.com/loveuer/esgo2dump/internal/interfaces"
	"github.com/loveuer/esgo2dump/internal/opt"
	"github.com/loveuer/esgo2dump/internal/util"
)

func NewClientV6(url *url.URL, iot interfaces.IO) (interfaces.DumpIO, error) {

	var (
		address     = fmt.Sprintf("%s://%s", url.Scheme, url.Host)
		urlIndex    = strings.TrimPrefix(url.Path, "/")
		urlUsername string
		urlPassword string
		errCh       = make(chan error)
		cliCh       = make(chan *elastic.Client)
	)

	if url.User != nil {
		urlUsername = url.User.Username()
		if p, ok := url.User.Password(); ok {
			urlPassword = p
		}
	}

	log.Debug("action=%s, endpoint=%s, index=%s, username=%s, password=%s", "new es client v6", address, urlIndex, urlUsername, urlPassword)

	if urlIndex == "" {
		return nil, fmt.Errorf("please specify index name: (like => http://127.0.0.1:9200/my_index)")
	}

	ncFunc := func(endpoints []string, username, password, index string) {
		var (
			err      error
			cli      *elastic.Client
			infoResp *esapi.Response
		)

		if cli, err = elastic.NewClient(
			elastic.Config{
				Addresses:     endpoints,
				Username:      username,
				Password:      password,
				CACert:        nil,
				RetryOnStatus: []int{429},
				MaxRetries:    3,
				RetryBackoff:  nil,
				Transport: &http.Transport{
					TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
					DialContext:     (&net.Dialer{Timeout: 10 * time.Second}).DialContext,
				},
			},
		); err != nil {
			log.Debug("action=%s, endpoints=%v, err=%s", "new es client v6 error", endpoints, err.Error())
			errCh <- err
			return
		}

		if infoResp, err = cli.Info(); err != nil {
			log.Debug("action=%s, endpoints=%v, err=%s", "new es client v6 info error", endpoints, err.Error())
			errCh <- err
			return
		}

		if infoResp.StatusCode != 200 {
			err = fmt.Errorf("info xes status=%d", infoResp.StatusCode)
			log.Debug("action=%s, endpoints=%v, err=%s", "es client v6 ping status error", endpoints, err.Error())
			errCh <- err
			return
		}

		cliCh <- cli
	}

	go ncFunc([]string{address}, urlUsername, urlPassword, urlIndex)

	select {
	case <-util.Timeout(10).Done():
		return nil, fmt.Errorf("dial es=%s err=%v", address, context.DeadlineExceeded)
	case c := <-cliCh:
		return &clientv6{client: c, index: urlIndex, iot: iot}, nil
	case e := <-errCh:
		return nil, e
	}
}

type clientv6 struct {
	client *elastic.Client
	iot    interfaces.IO
	index  string
}

func (c *clientv6) Info(msg string, data ...any) {
	log.Info(msg, data...)
}

func (c *clientv6) WriteData(ctx context.Context, docsCh <-chan []*model.ESSource) error {
	return es6.WriteData(ctx, c.client, c.index, docsCh, c)
}

func (c *clientv6) checkResponse(r *esapi.Response) error {
	if r.StatusCode == 200 {
		return nil
	}

	return fmt.Errorf("status=%d msg=%s", r.StatusCode, r.String())
}

func (c *clientv6) IOType() interfaces.IO {
	return c.iot
}

func (c *clientv6) IsFile() bool {
	return false
}

func (c *clientv6) Close() error {
	return nil
}

func (c *clientv6) ReadData(ctx context.Context, size int, query map[string]any, source []string, sort []string) (<-chan []*model.ESSource, <-chan error) {
	dch, ech := es6.ReadData(ctx, c.client, c.index, size, 0, query, source, sort)

	return dch, ech
}

func (c *clientv6) ReadMapping(ctx context.Context) (map[string]any, error) {
	r, err := c.client.Indices.GetMapping(
		c.client.Indices.GetMapping.WithIndex(c.index),
	)
	if err != nil {
		return nil, err
	}

	if r.StatusCode != 200 {
		return nil, fmt.Errorf("status=%d, msg=%s", r.StatusCode, r.String())
	}

	m := make(map[string]any)
	decoder := json.NewDecoder(r.Body)
	if err = decoder.Decode(&m); err != nil {
		return nil, err
	}

	return m, nil
}
func (c *clientv6) WriteMapping(ctx context.Context, m map[string]any) error {
	var (
		err    error
		bs     []byte
		result *esapi.Response
	)

	for idxKey := range m {
		if bs, err = json.Marshal(m[idxKey]); err != nil {
			return err
		}

		if result, err = c.client.Indices.Create(
			c.index,
			c.client.Indices.Create.WithContext(util.TimeoutCtx(ctx, opt.Timeout)),
			c.client.Indices.Create.WithBody(bytes.NewReader(bs)),
		); err != nil {
			return err
		}

		if err = c.checkResponse(result); err != nil {
			return err
		}
	}

	return nil
}

func (c *clientv6) ReadSetting(ctx context.Context) (map[string]any, error) {
	r, err := c.client.Indices.GetSettings(
		c.client.Indices.GetSettings.WithContext(util.TimeoutCtx(ctx, opt.Timeout)),
		c.client.Indices.GetSettings.WithIndex(c.index),
	)
	if err != nil {
		return nil, err
	}

	if r.StatusCode != 200 {
		return nil, fmt.Errorf("status=%d, msg=%s", r.StatusCode, r.String())
	}

	m := make(map[string]any)
	decoder := json.NewDecoder(r.Body)
	if err = decoder.Decode(&m); err != nil {
		return nil, err
	}

	return m, nil
}

func (c *clientv6) WriteSetting(ctx context.Context, m map[string]any) error {
	var (
		err    error
		bs     []byte
		result *esapi.Response
	)

	if bs, err = json.Marshal(m); err != nil {
		return err
	}

	if result, err = c.client.Indices.PutSettings(
		bytes.NewReader(bs),
		c.client.Indices.PutSettings.WithContext(util.TimeoutCtx(ctx, opt.Timeout)),
	); err != nil {
		return err
	}

	return c.checkResponse(result)
}