package api

import (
	"encoding/json"

	"github.com/google/uuid"

	"kereru.forms/internal/database"
)

func toAPIForm(f *database.Form) Form {
	questions := make([]Question, 0, len(f.Questions))
	for _, q := range f.Questions {
		questions = append(questions, toAPIQuestion(q))
	}
	return Form{
		Id:                        uuid.MustParse(f.ID),
		FormGroupId:               uuid.MustParse(f.FormGroupID),
		Version:                   f.Version,
		Title:                     f.Title,
		Description:               f.Description,
		Introduction:              f.Introduction,
		IsActive:                  f.IsActive,
		RequiresAccessCode:        f.RequiresAccessCode,
		SignatureRequired:         boolPtrIfSet(f.SignatureRequired, true),
		ExternalReferenceRequired: boolPtrIfSet(f.ExternalReferenceRequired, true),
		ExternalReferenceLabel:    f.ExternalReferenceLabel,
		LogoUrl:                   f.LogoURL,
		PdfUrl:                    f.PDFURL,
		CompanyName:               f.CompanyName,
		ContactEmail:              f.ContactEmail,
		ContactPhone:              f.ContactPhone,
		ContactUrl:                f.ContactURL,
		CreatedAt:                 f.CreatedAt,
		UpdatedAt:                 f.UpdatedAt,
		Questions:                 questions,
	}
}

func toAPIQuestion(q database.Question) Question {
	out := Question{
		Id:          uuid.MustParse(q.ID),
		Key:         q.Key,
		Label:       q.Label,
		Description: q.Description,
		Type:        QuestionType(q.Type),
		Required:    q.Required,
		Placeholder: q.Placeholder,
		Multiline:   boolPtrIfSet(q.Multiline, QuestionType(q.Type) == Text),
	}
	if q.MinValue != nil {
		v := float32(*q.MinValue)
		out.MinValue = &v
	}
	if q.MaxValue != nil {
		v := float32(*q.MaxValue)
		out.MaxValue = &v
	}
	if len(q.Options) > 0 {
		opts := make([]QuestionOption, 0, len(q.Options))
		for _, o := range q.Options {
			opts = append(opts, QuestionOption{Value: o.Value, Label: o.Label})
		}
		out.Options = &opts
	}
	return out
}

func boolPtrIfSet(v bool, include bool) *bool {
	if !include && !v {
		return nil
	}
	b := v
	return &b
}

func toAPIFormSummary(f database.FormSummary) FormSummary {
	return FormSummary{
		Id:                        uuid.MustParse(f.ID),
		FormGroupId:               uuid.MustParse(f.FormGroupID),
		Version:                   f.Version,
		Title:                     f.Title,
		Description:               f.Description,
		LogoUrl:                   f.LogoURL,
		PdfUrl:                    f.PDFURL,
		ExternalReferenceRequired: boolPtrIfSet(f.ExternalReferenceRequired, true),
		ExternalReferenceLabel:    f.ExternalReferenceLabel,
		IsActive:                  f.IsActive,
		QuestionCount:             f.QuestionCount,
		CreatedAt:                 f.CreatedAt,
		UpdatedAt:                 f.UpdatedAt,
	}
}

func toAPIAnswerRecord(a database.Answer) AnswerRecord {
	var value interface{}
	_ = json.Unmarshal(a.Value, &value)
	return AnswerRecord{
		QuestionId:  uuid.MustParse(a.QuestionID),
		QuestionKey: a.QuestionKey,
		Value:       value,
	}
}

func toAPISubmission(s *database.Submission) Submission {
	answers := make([]AnswerRecord, 0, len(s.Answers))
	for _, a := range s.Answers {
		answers = append(answers, toAPIAnswerRecord(a))
	}
	out := Submission{
		Id:                uuid.MustParse(s.ID),
		FormId:            uuid.MustParse(s.FormID),
		FormVersion:       s.FormVersion,
		UserId:            s.UserID,
		UserIdType:        UserIdType(s.UserIDType),
		SubmittedAt:       s.SubmittedAt,
		Answers:           answers,
		ExternalReference: s.ExternalReference,
		OfflinePdfName:    s.OfflinePDFName,
	}
	if s.Signature != nil {
		out.Signature = &Signature{
			Type:     SignatureType(s.Signature.Type),
			DataUrl:  s.Signature.DataURL,
			Name:     s.Signature.Name,
			Title:    s.Signature.Title,
			SignedAt: s.Signature.SignedAt,
		}
	}
	if hasTracking(s) {
		out.Tracking = &Tracking{
			IpAddress: s.IPAddress,
			UserAgent: s.UserAgent,
			Locale:    s.Locale,
			Timezone:  s.Timezone,
			Place:     s.Place,
			Referer:   s.Referer,
		}
	}
	return out
}

func hasTracking(s *database.Submission) bool {
	return s.IPAddress != nil || s.UserAgent != nil || s.Locale != nil ||
		s.Timezone != nil || s.Place != nil || s.Referer != nil
}

func toAPISubmissionSummary(s database.SubmissionSummary) SubmissionSummary {
	return SubmissionSummary{
		Id:                uuid.MustParse(s.ID),
		FormId:            uuid.MustParse(s.FormID),
		FormVersion:       s.FormVersion,
		UserId:            s.UserID,
		UserIdType:        UserIdType(s.UserIDType),
		ExternalReference: s.ExternalReference,
		SubmittedAt:       s.SubmittedAt,
	}
}

func toAPIAccessCode(c database.AccessCode) AccessCode {
	return AccessCode{
		Id:        uuid.MustParse(c.ID),
		FormId:    uuid.MustParse(c.FormID),
		Code:      c.Code,
		Used:      c.Used,
		UsedAt:    c.UsedAt,
		CreatedAt: c.CreatedAt,
	}
}

func questionInputsToRecords(inputs []QuestionInput) []database.Question {
	out := make([]database.Question, 0, len(inputs))
	for i, q := range inputs {
		rec := database.Question{
			Position:    i,
			Key:         q.Key,
			Label:       q.Label,
			Description: q.Description,
			Type:        string(q.Type),
			Required:    q.Required,
			Placeholder: q.Placeholder,
		}
		if q.MinValue != nil {
			v := float64(*q.MinValue)
			rec.MinValue = &v
		}
		if q.MaxValue != nil {
			v := float64(*q.MaxValue)
			rec.MaxValue = &v
		}
		if q.Multiline != nil {
			rec.Multiline = *q.Multiline
		}
		if q.Options != nil {
			for _, o := range *q.Options {
				rec.Options = append(rec.Options, database.QuestionOption{Value: o.Value, Label: o.Label})
			}
		}
		out = append(out, rec)
	}
	return out
}