package redmine

import (
	"fmt"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/integration/iface"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/integration/null"
	"gitea.neur0tx.site/Neur0toxine/vegapokerbot/internal/integration/redmine/api"
	"go.uber.org/zap"
	"regexp"
	"strconv"
	"strings"
)

var issueNumberMatcher = regexp.MustCompile(`(?m)\/issues\/(\d+)`)

var sprintNames = []string{"sprint", "спринт"}

type Redmine struct {
	api         *api.Client
	log         *zap.SugaredLogger
	spFieldName string
}

func New(params map[string]interface{}, log *zap.SugaredLogger) iface.Integration {
	uri, ok := params["url"]
	if !ok {
		return null.New()
	}
	key, ok := params["key"]
	if !ok {
		return null.New()
	}
	uriString, ok := uri.(string)
	if !ok {
		return null.New()
	}
	keyString, ok := key.(string)
	if !ok {
		return null.New()
	}
	var spField string
	if spFieldName, ok := params["sp_field"]; ok {
		if strField, ok := spFieldName.(string); ok {
			spField = strField
		}
	}
	return &Redmine{api: api.New(uriString, keyString, log), log: log, spFieldName: spField}
}

func (r *Redmine) GetTaskInfo(input string) (int, string) {
	taskNumber := r.getTaskNumber(input)
	if taskNumber == 0 {
		r.log.Debugf("[Redmine] Cannot extract task number from %s", input)
		return 0, ""
	}
	task, err := r.api.Issue(taskNumber)
	if err != nil {
		r.log.Errorf("[Redmine] Cannot get Redmine issue %d: %s", taskNumber, err)
		return 0, ""
	}
	sprint := r.getSprint(task.CustomFields)
	if sprint != "" {
		sprint = fmt.Sprintf(" - _%s_", sprint)
	}
	taskInfo := strings.ReplaceAll(fmt.Sprintf("_(%s) %s_: [%s](%s/issues/%d)%s",
		task.Project.Name, task.Tracker.Name, task.Subject, r.api.URL, taskNumber, sprint), "*", "")
	return task.ID, "\n" + taskInfo + ""
}

func (r *Redmine) PushVoteResult(id int, result float64) error {
	task, err := r.api.Issue(id)
	if err != nil {
		return err
	}
	issue := &api.Issue{
		EstimatedHours: api.Hours(strconv.FormatFloat(result*8, 'f', 0, 64)),
	}
	if r.spFieldName != "" {
		for _, field := range task.CustomFields {
			field := field
			if field.Name == r.spFieldName {
				field.Value = strconv.FormatFloat(result, 'f', 1, 64)
				issue.CustomFields = []api.CustomField{field}
			}
		}
	}
	return r.api.UpdateIssue(id, issue)
}

func (r *Redmine) getTaskNumber(input string) int {
	num, err := strconv.Atoi(input)
	if err == nil && num > 0 {
		return num
	}
	matches := issueNumberMatcher.FindStringSubmatch(input)
	if len(matches) < 2 {
		return 0
	}
	number, err := strconv.Atoi(matches[1])
	if err != nil {
		return 0
	}
	return number
}

func (r *Redmine) getSprint(fields []api.CustomField) string {
	for _, field := range fields {
		for _, name := range sprintNames {
			if strings.ToLower(field.Name) == name {
				return field.Value
			}
		}
	}
	return ""
}