package qiyuesuosdk

import (
	"net/url"
	"strconv"

	contract_request "git.sxidc.com/student-physical-examination/contract_lock_sdk/model/contract/request"
	"git.sxidc.com/student-physical-examination/contract_lock_sdk/model/common"
	v2contract_request "git.sxidc.com/student-physical-examination/contract_lock_sdk/model/v2contract/request"
	v2document_response "git.sxidc.com/student-physical-examination/contract_lock_sdk/model/v2document/response"
)

// SignDocument 上传 PDF → 创建合同 → 企业静默签 → [个人静默签] → 下载。
func (c *Client) SignDocument(req SignDocumentRequest) ([]byte, error) {
	processID := c.resolveProcessID(req.ProcessID)
	launcher := c.resolveLauncher(req.Launcher)
	if processID == "" || launcher == "" {
		return nil, ErrInvalidParams
	}

	docID, err := c.uploadDocument(req.Subject, req.PDF)
	if err != nil {
		return nil, err
	}

	openUserIDs := make([]string, 0, len(req.PersonalSeals))
	for _, p := range req.PersonalSeals {
		openUserIDs = append(openUserIDs, p.OpenUserID)
	}
	contractID, err := c.createContract(processID, req.Subject, launcher, docID, req.CompanySeal.CompanyName, openUserIDs)
	if err != nil {
		return nil, err
	}
	if err = c.companySilentSign(contractID, req.CompanySeal); err != nil {
		return nil, err
	}
	for _, p := range req.PersonalSeals {
		if err = c.personalSilentSign(contractID, p); err != nil {
			return nil, err
		}
	}
	return c.downloadDocument(docID)
}

// SignDualCompany 双企业公章签署（无个人签）。
func (c *Client) SignDualCompany(req SignDualCompanyRequest) ([]byte, error) {
	processID := c.resolveProcessID(req.ProcessID)
	launcher := c.resolveLauncher(req.Launcher)
	if processID == "" || launcher == "" || len(req.CompanySeals) == 0 {
		return nil, ErrInvalidParams
	}

	docID, err := c.uploadDocument(req.Subject, req.PDF)
	if err != nil {
		return nil, err
	}
	names := make([]string, len(req.CompanySeals))
	for i, s := range req.CompanySeals {
		names[i] = s.CompanyName
	}
	contractID, err := c.createDualCompanyContract(processID, req.Subject, launcher, docID, names)
	if err != nil {
		return nil, err
	}
	for _, seal := range req.CompanySeals {
		if err = c.companySilentSign(contractID, seal); err != nil {
			return nil, err
		}
	}
	return c.downloadDocument(docID)
}

func (c *Client) uploadDocument(title string, pdf []byte) (string, error) {
	fields := map[string]string{
		"title":    title,
		"fileType": "pdf",
	}
	var resp struct {
		apiResponse
		Result v2document_response.V2DocumentCreatebyfileResponse `json:"result"`
	}
	if err := c.postMultipart("/v2/document/createbyfile", fields, "file", pdf, &resp); err != nil {
		return "", err
	}
	if err := resp.err(); err != nil {
		return "", err
	}
	return resp.Result.DocumentId, nil
}

func (c *Client) createContract(processID, subject, launcher, documentID, companyName string, openUserIDs []string) (string, error) {
	docInt, err := strconv.ParseInt(documentID, 10, 64)
	if err != nil {
		return "", err
	}
	send := true
	remind := false
	var serialNo int64 = 1
	signatories := []*common.Signatory{{
		TenantName: companyName,
		TenantType: "COMPANY",
		SerialNo:   &serialNo,
		Remind:     &remind,
	}}
	for _, uid := range openUserIDs {
		serialNo++
		sNo := serialNo
		signatories = append(signatories, &common.Signatory{
			TenantType: "PERSONAL",
			SerialNo:   &sNo,
			Remind:     &remind,
			OpenUserId: uid,
		})
	}
	req := contract_request.ContractCreatebycategoryRequest{
		CategoryId:  processID,
		Subject:     subject,
		Send:        &send,
		TenantName:  launcher,
		Documents:   []int64{docInt},
		Signatories: signatories,
	}
	var contractID string
	resp := c.sdk.ServiceAsModel(req, contractID)
	id, err := c.serviceString(resp)
	return id, err
}

func (c *Client) createDualCompanyContract(processID, subject, launcher, documentID string, companyNames []string) (string, error) {
	docInt, err := strconv.ParseInt(documentID, 10, 64)
	if err != nil {
		return "", err
	}
	send := true
	remind := false
	var serialNo int64 = 1
	var actionSerial int64 = 1
	signatories := make([]*common.Signatory, 0, len(companyNames))
	for _, name := range companyNames {
		sNo := serialNo
		serialNo++
		aNo := actionSerial
		signatories = append(signatories, &common.Signatory{
			TenantName: name,
			TenantType: "COMPANY",
			SerialNo:   &sNo,
			Remind:     &remind,
			Actions: []*common.Action{{
				Type_:    "CORPORATE",
				SerialNo: &aNo,
			}},
		})
	}
	req := contract_request.ContractCreatebycategoryRequest{
		CategoryId:  processID,
		Subject:     subject,
		Send:        &send,
		TenantName:  launcher,
		Documents:   []int64{docInt},
		Signatories: signatories,
	}
	var contractID string
	resp := c.sdk.ServiceAsModel(req, contractID)
	id, err := c.serviceString(resp)
	return id, err
}

func (c *Client) companySilentSign(contractID string, spec CompanySealSpec) error {
	cInt, err := strconv.ParseInt(contractID, 10, 64)
	if err != nil {
		return err
	}
	stamper := &common.CompanyStamperBean{
		Type_:        "SEAL_CORPORATE",
		Keyword:      spec.Keyword,
		OffsetX:      spec.OffsetX,
		OffsetY:      spec.OffsetY,
	}
	if spec.RotateDegree != 0 {
		stamper.RotateDegree = &spec.RotateDegree
	}
	if spec.Page != "" {
		stamper.Page = spec.Page
	}
	req := v2contract_request.V2ContractSignbycompanyRequest{
		Contract: &common.SignSilentContract{Id: &cInt},
		Company:  &common.CompanyRequest{Name: spec.CompanyName},
		SealRequest: &common.SealMultipleRequest{
			Company: &common.CompanyRequest{Name: spec.CompanyName},
		},
		Stampers: []*common.CompanyStamperBean{stamper},
	}
	return c.serviceOK(c.sdk.Service(req))
}

func (c *Client) personalSilentSign(contractID string, spec PersonalSealSpec) error {
	cInt, err := strconv.ParseInt(contractID, 10, 64)
	if err != nil {
		return err
	}
	width, height := 12.0, 5.0
	offsetX, offsetY := -30.0, 16.0
	useDefault := true
	req := v2contract_request.V2ContractSignbypersonRequest{
		Contract: &common.SignSilentContract{Id: &cInt},
		User:     &common.User{OpenUserId: spec.OpenUserID},
		SealInfoRequest: &common.PersonSealInfoRequest{
			User:                  &common.UserInfoRequest{OpenUserId: spec.OpenUserID},
			DefaultPersonSignFlag: &useDefault,
			PersonSealCarrier:     "PERSON_SIGN",
		},
		Stampers: []*common.StamperBean{{
			Type_:        "SEAL_PERSONAL",
			Keyword:      spec.Keyword,
			KeywordIndex: "0",
			Width:        &width,
			Height:       &height,
			OffsetX:      &offsetX,
			OffsetY:      &offsetY,
			OffsetUnit:   "POINT",
		}},
	}
	return c.serviceOK(c.sdk.Service(req))
}

func (c *Client) downloadDocument(documentID string) ([]byte, error) {
	q := url.Values{"documentId": {documentID}}
	return c.download("/document/download", q)
}