package cmd

import (
	"encoding/json"
	"fmt"
	"net/url"

	"github.com/SAP/jenkins-library/pkg/abap/aakaas"
	abapbuild "github.com/SAP/jenkins-library/pkg/abap/build"
	"github.com/SAP/jenkins-library/pkg/abaputils"
	"github.com/SAP/jenkins-library/pkg/log"
	"github.com/SAP/jenkins-library/pkg/telemetry"
	"github.com/pkg/errors"
)

func abapAddonAssemblyKitCheckCVs(config abapAddonAssemblyKitCheckCVsOptions, telemetryData *telemetry.CustomData, cpe *abapAddonAssemblyKitCheckCVsCommonPipelineEnvironment) {
	utils := aakaas.NewAakBundle()
	if err := runAbapAddonAssemblyKitCheckCVs(&config, telemetryData, &utils, cpe); err != nil {
		log.Entry().WithError(err).Fatal("step execution failed")
	}
}

func runAbapAddonAssemblyKitCheckCVs(config *abapAddonAssemblyKitCheckCVsOptions, telemetryData *telemetry.CustomData, utils *aakaas.AakUtils, cpe *abapAddonAssemblyKitCheckCVsCommonPipelineEnvironment) error {
	conn := new(abapbuild.Connector)
	if err := conn.InitAAKaaS(config.AbapAddonAssemblyKitEndpoint, config.Username, config.Password, *utils); err != nil {
		return err
	}

	log.Entry().Infof("Reading Product Version Information from addonDescriptor (aka addon.yml) file: %s", config.AddonDescriptorFileName)
	addonDescriptor, err := (*utils).ReadAddonDescriptor(config.AddonDescriptorFileName)
	if err != nil {
		return err
	}

	for i := range addonDescriptor.Repositories {
		var c componentVersion
		c.initCV(addonDescriptor.Repositories[i], *conn)
		err := c.validate()
		if err != nil {
			return err
		}
		c.copyFieldsToRepo(&addonDescriptor.Repositories[i])
	}

	// now Software Component Versions fields are valid, but maybe Product Version was checked before, so copy that part from CPE
	// we don't care for errors
	// scenario 1: config.AddonDescriptor is empty since checkCVs is the first step in the pipeline, then the empty result is fine anyway
	// scenario 2: for some reason config.AddonDescriptor is corrupt - then we insert the valid data but delete the repositories which will ensure issue is found later on
	addonDescriptorCPE, _ := abaputils.ConstructAddonDescriptorFromJSON([]byte(config.AddonDescriptor))
	if len(addonDescriptorCPE.AddonProduct) == 0 {
		log.Entry().Info("No Product Version information present yet in the addonDescriptor of CommonPipelineEnvironment")
	} else {
		log.Entry().Infof("Information for Product Version %s taken from addonDescriptor of CommonPipelineEnvironment", addonDescriptorCPE.AddonProduct)
	}
	addonDescriptorCPE.SetRepositories(addonDescriptor.Repositories)
	cpe.abap.addonDescriptor = string(addonDescriptorCPE.AsJSON())
	log.Entry().Info("Wrote addonDescriptor to CommonPipelineEnvironment")
	return nil
}

//take the product part from CPE and the repositories part from the YAML file
func combineYAMLRepositoriesWithCPEProduct(addonDescriptor abaputils.AddonDescriptor, addonDescriptorFromCPE abaputils.AddonDescriptor) abaputils.AddonDescriptor {
	addonDescriptorFromCPE.Repositories = addonDescriptor.Repositories
	return addonDescriptorFromCPE
}

func (c *componentVersion) initCV(repo abaputils.Repository, conn abapbuild.Connector) {
	c.Connector = conn
	c.Name = repo.Name
	c.VersionYAML = repo.VersionYAML
	c.CommitID = repo.CommitID
	c.UseClassicCTS = repo.UseClassicCTS
}

func (c *componentVersion) copyFieldsToRepo(initialRepo *abaputils.Repository) {
	initialRepo.Version = c.Version
	initialRepo.SpLevel = c.SpLevel
	initialRepo.PatchLevel = c.PatchLevel
}

func (c *componentVersion) validate() error {
	log.Entry().Infof("Validate component %s version %s and resolve version", c.Name, c.VersionYAML)
	appendum := "/odata/aas_ocs_package/ValidateComponentVersion?Name='" + url.QueryEscape(c.Name) + "'&Version='" + url.QueryEscape(c.VersionYAML) + "'"
	body, err := c.Connector.Get(appendum)
	if err != nil {
		return err
	}
	var jCV jsonComponentVersion
	if err := json.Unmarshal(body, &jCV); err != nil {
		return errors.Wrap(err, "Unexpected AAKaaS response for Validate Component Version: "+string(body))
	}
	c.Name = jCV.ComponentVersion.Name
	c.Version = jCV.ComponentVersion.Version
	c.SpLevel = jCV.ComponentVersion.SpLevel
	c.PatchLevel = jCV.ComponentVersion.PatchLevel
	log.Entry().Infof("Resolved version %s, splevel %s, patchlevel %s", c.Version, c.SpLevel, c.PatchLevel)
	log.Entry().Infof("Using cCTS %t", c.UseClassicCTS)

	if !c.UseClassicCTS && c.CommitID == "" {
		return fmt.Errorf("CommitID missing in repo '%s' of the addon.yml", c.Name)
	}

	return nil
}

type jsonComponentVersion struct {
	ComponentVersion *componentVersion `json:"d"`
}

type componentVersion struct {
	abapbuild.Connector
	Name          string `json:"Name"`
	VersionYAML   string
	Version       string `json:"Version"`
	SpLevel       string `json:"SpLevel"`
	PatchLevel    string `json:"PatchLevel"`
	UseClassicCTS bool
	CommitID      string
}
