/*
Copyright © 2026 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package es

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"strings"
	"time"

	"codeberg.org/scip/esctl/pkg/cfg"
	"github.com/elastic/go-elasticsearch/v9/typedapi/core/deletebyquery"
	"github.com/elastic/go-elasticsearch/v9/typedapi/esdsl"
	"github.com/tidwall/gjson"
)

// create index with:
//
// esctl index create foo [id:keyword user:text age:integer]
//
// then add a doc:
//
// esctl doc add foo2 '{"id":"d8d8d","user":"scip"}'
func DocAdd(conf *cfg.Config, jsondoc string) error {
	data := map[string]any{}

	err := json.Unmarshal([]byte(jsondoc), &data)
	if err != nil {
		return fmt.Errorf("supplied document was not valid JSON: %s", err)
	}

	now := fmt.Sprintf("%d", time.Now().Unix())

	res, err := conf.DefaultCluster.ES.Create(conf.Index, now).
		Document(data).
		Header("content-type", "application/json").
		Header("accept", "application/json").
		Do(context.Background())
	if err != nil {
		return fmt.Errorf("failed to create new doc in index %s: %s", conf.Index, err)
	}

	fmt.Println(res.Id_)

	return nil
}

func DocShow(conf *cfg.Config, id string) error {
	res, err := conf.DefaultCluster.ES.Get(conf.Index, id).
		Header("content-type", "application/json").
		Header("accept", "application/json").
		Do(context.Background())
	if err != nil {
		return fmt.Errorf("failed to retrieve doc in index %s: %s", conf.Index, err)
	}

	if !res.Found {
		return errors.New("no document with that id found")
	}

	docjson := fmt.Sprintf(`{"id":%s, "index":"%s", "source":%s}`,
		res.Id_,
		res.Index_,
		res.Source_)

	if conf.Path != "" {
		value := gjson.Get(docjson, conf.Path)
		fmt.Println(value.String())
	} else {
		fmt.Println(docjson)
	}

	fmt.Println()

	return nil
}

func DocDelete(conf *cfg.Config, queries []string) error {
	if len(queries) == 1 && strings.Contains(queries[0], "id=") {
		id, _ := strings.CutPrefix(queries[0], "id=")

		_, err := conf.DefaultCluster.ES.Delete(conf.Index, id).
			Header("content-type", "application/json").
			Header("accept", "application/json").
			Do(context.Background())
		if err != nil {
			return fmt.Errorf("failed to delete doc in index %s: %s", conf.Index, err)
		}

		return nil
	}

	req := &deletebyquery.Request{}

	if len(queries) == 0 && conf.All {
		req.Query = esdsl.NewMatchAllQuery().QueryCaster()
	} else {
		queryCaster, err := prepareQuery(conf, queries)
		if err != nil {
			return err
		}

		req.Query = queryCaster
	}

	_, err := conf.DefaultCluster.ES.DeleteByQuery(conf.Index).
		Request(req).
		Header("content-type", "application/json").
		Header("accept", "application/json").
		Do(context.Background())
	if err != nil {
		return fmt.Errorf("failed to delete docs in index %s: %s", conf.Index, err)
	}

	return nil
}