package resources

import (
	"fmt"
	"strings"
	"xcecli/common/output"
	"xcecli/common/request"
	"xcecli/config"
	"xcecli/models"

	logger "xcecli/config"
	resource_filter "xcecli/filters"

	"github.com/spf13/cobra"
	"go.uber.org/zap"
)

type ResourcesDistQuerier struct {
	configManager *config.ConfigManager
	filter        *resource_filter.ResourceDistFilter
	fields        string
	distType      string
	jsonOutput    bool
	noHeader      bool
	verbose       bool
	wideFormat    bool // wide format
}

func NewResourcesDistQuerier(configManager *config.ConfigManager) *ResourcesDistQuerier {
	return &ResourcesDistQuerier{
		configManager: configManager,
		filter:        &resource_filter.ResourceDistFilter{},
	}
}

func (rq *ResourcesDistQuerier) ParseCmdArgs(cmd *cobra.Command, args []string) error {
	// No additional processing needed, all parameters are bound in flags
	if len(args) > 0 {
		rq.filter.ResName = strings.Join(args, ",")
	}

	// Define mutual exclusions for verbose flag
	if rq.verbose {
		conflicts := make([]string, 0)

		if rq.wideFormat {
			conflicts = append(conflicts, "--wided (-w)")
		}

		if len(conflicts) > 0 {
			return fmt.Errorf("flag --verbose (-l) cannot be used with: %s\n\n%s",
				strings.Join(conflicts, ", "), cmd.UsageString())
		}
	}
	return nil
}

// ResourcesDefQuerier handles querying resource definition information
type ResourcesDefQuerier struct {
	configManager *config.ConfigManager
	filter        *resource_filter.ResourceDefFilter
	fields        string
	jsonOutput    bool
	noHeader      bool
	verbose       bool
	wideFormat    bool // wide format
}

func NewResourcesDefQuerier(configManager *config.ConfigManager) *ResourcesDefQuerier {
	return &ResourcesDefQuerier{
		configManager: configManager,
		filter:        &resource_filter.ResourceDefFilter{},
	}
}

func (rq *ResourcesDefQuerier) ParseCmdArgs(cmd *cobra.Command, args []string) error {
	// No additional processing needed, all parameters are bound in flags
	if len(args) > 0 {
		rq.filter.ResName = strings.Join(args, ",")
	}

	// Define mutual exclusions for verbose flag
	if rq.verbose {
		conflicts := make([]string, 0)

		if rq.wideFormat {
			conflicts = append(conflicts, "--wided (-w)")
		}

		if len(conflicts) > 0 {
			return fmt.Errorf("flag --verbose (-l) cannot be used with: %s\n\n%s",
				strings.Join(conflicts, ", "), cmd.UsageString())
		}
	}
	return nil
}

// NewListResourcesDefCmd creates a command for listing resource definition information
func NewListResourcesDefCmd(configManager *config.ConfigManager) *cobra.Command {
	resourcesDefQuerier := NewResourcesDefQuerier(configManager)

	cmd := &cobra.Command{
		Use:   "list",
		Short: "Query the resources definition info",
		Long: `Query the resources definition info.
Example:
  xce resources definition list                    # query the definition info`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := resourcesDefQuerier.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := resourcesDefQuerier.RunResourcesDefList(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// Add command line parameters
	flags := cmd.Flags()

	flags.BoolVarP(&resourcesDefQuerier.verbose, "verbose", "l", false, "show resource detail")
	flags.BoolVarP(&resourcesDefQuerier.wideFormat, "wided", "w", false, "output in wide format")
	flags.BoolVarP(&resourcesDefQuerier.jsonOutput, "json", "", false, "output in JSON format")
	flags.BoolVarP(&resourcesDefQuerier.noHeader, "noheader", "n", false, "output no header")
	return cmd
}

func (rq *ResourcesDefQuerier) RunResourcesDefList() error {
	// Get configuration

	// Get server information
	serverInfo, _ := rq.configManager.GetServerInfo()
	// create API client
	apiClient := request.NewAPIClient(serverInfo.URL)
	apiClient.SetRootCAs(serverInfo.CACert)

	// Create query parameters
	params := make(map[string]string)

	// Get filter string
	filterStr, err := rq.filter.HandleResourceDefFilter()

	if err != nil {
		errMsg := request.ExtractErrorMessage(err)
		return fmt.Errorf("failed to get filter: [%s]", errMsg)
	} else if filterStr != "" {
		params["filter"] = filterStr
	}

	// Field mapping
	fieldsMap := models.ResourceDefFieldsMap

	if rq.verbose && rq.fields == "" {
		for header := range fieldsMap {
			rq.fields += header + ","
		}
		rq.fields = strings.TrimSuffix(rq.fields, ",")
	}
	// Process field selection
	if rq.fields != "" {
		rq.fields = request.CleanFields(rq.fields)
		mappedFields, err := request.CheckAndMapFields(rq.fields, fieldsMap)
		if err != nil {
			return err
		}
		params["fields"] = strings.Join(mappedFields, ",")
	}

	// create page printer
	pagePrinter := output.NewPagePrinter(output.DataTypeResourcesDef, output.WithFields(rq.fields),
		output.WithFormatJson(rq.jsonOutput), output.WithNoHeader(rq.noHeader),
		output.WithVerbose(rq.verbose), output.WithWideFormat(rq.wideFormat))

	// Record if the first page has been processed
	isFirstPage := true

	var (
		resp      models.ResourceDefResponse
		loopCount int
		pageToken string
	)

	// Loop to get all pages of data
	for {
		if loopCount > 0 && pageToken == "" {
			break
		}
		err = apiClient.GetRequestFromAPIServer(serverInfo.Token, pageToken, serverInfo.CACert, "/xce/v1/resources/definition", &resp, params)
		if err != nil {
			return err
		}
		if len(resp.Data.Rows) == 0 {
			if isFirstPage {
				fmt.Println("no resource definition found")
				return nil
			}
		}

		// Process the first page
		if isFirstPage {
			// Start printing process
			pagePrinter.StartPrinting()
			// Prepare for printing, calculate column width and table header, etc.
			pagePrinter.PrepareForPrinting(&resp)
			isFirstPage = false
		}

		// Print the current page
		pagePrinter.PrintPage(&resp)

		// Update page token and loop counter
		pageToken = resp.Data.Page_token
		loopCount++
	}

	// Finish printing
	pagePrinter.Finish()

	logger.Debug("resource definition response completed", zap.Int("pages", loopCount))
	return nil
}

// NewListResourcesDistCmd creates a command for listing resource distribution information
func NewListResourcesDistCmd(configManager *config.ConfigManager) *cobra.Command {
	resourcesDistQuerier := NewResourcesDistQuerier(configManager)

	cmd := &cobra.Command{
		Use:   "list",
		Short: "Query the resources distribution info",
		Long: `Query the resources info, support static and dynamic type.
Example:
  xce resources distribution list                    # query the distribution info`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if err := resourcesDistQuerier.ParseCmdArgs(cmd, args); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			if err := resourcesDistQuerier.RunResourcesDistList(); err != nil {
				fmt.Println(strings.ToLower(err.Error()))
				return nil
			}
			return nil
		},
	}

	// Add command line parameters
	flags := cmd.Flags()
	flags.StringVarP(&resourcesDistQuerier.distType, "type", "t", "", "static or dynamic")
	flags.BoolVarP(&resourcesDistQuerier.wideFormat, "wided", "w", false, "output in wide format")
	flags.BoolVarP(&resourcesDistQuerier.jsonOutput, "json", "", false, "output in JSON format")
	flags.BoolVarP(&resourcesDistQuerier.noHeader, "noheader", "n", false, "output no header")

	return cmd
}

func (rq *ResourcesDistQuerier) RunResourcesDistList() error {
	// Get configuration

	// Get server information
	serverInfo, _ := rq.configManager.GetServerInfo()
	// create API client
	apiClient := request.NewAPIClient(serverInfo.URL)
	apiClient.SetRootCAs(serverInfo.CACert)

	// Create query parameters
	params := make(map[string]string)

	// Get filter string
	filterStr, err := rq.filter.HandleResourceDistFilter()

	if rq.distType != "" {
		if rq.distType != "static" && rq.distType != "dynamic" {
			return fmt.Errorf("invalid type, must be 'static' or 'dynamic'")
		} else {
			params["type"] = rq.distType
		}
	}
	if err != nil {
		errMsg := request.ExtractErrorMessage(err)
		return fmt.Errorf("failed to get filter: [%s]", errMsg)
	} else if filterStr != "" {
		params["filter"] = filterStr
	}

	// Field mapping
	fieldsMap := models.ResourceDistFieldsMap

	if rq.verbose && rq.fields == "" {
		for header := range fieldsMap {
			rq.fields += header + ","
		}
		rq.fields = strings.TrimSuffix(rq.fields, ",")
	}
	// Process field selection
	if rq.fields != "" {
		rq.fields = request.CleanFields(rq.fields)
		mappedFields, err := request.CheckAndMapFields(rq.fields, fieldsMap)
		if err != nil {
			return err
		}
		params["fields"] = strings.Join(mappedFields, ",")
	}

	// create page printer
	pagePrinter := output.NewPagePrinter(output.DataTypeResourcesDist, output.WithFields(rq.fields),
		output.WithFormatJson(rq.jsonOutput), output.WithNoHeader(rq.noHeader),
		output.WithVerbose(rq.verbose), output.WithWideFormat(rq.wideFormat))

	// Record if the first page has been processed
	isFirstPage := true

	var (
		resp      models.ResourceDistResponse
		loopCount int
		pageToken string
	)

	// Loop to get all pages of data
	for {
		if loopCount > 0 && pageToken == "" {
			break
		}
		err = apiClient.GetRequestFromAPIServer(serverInfo.Token, pageToken, serverInfo.CACert, "/xce/v1/resources/distribution", &resp, params)
		if err != nil {
			return err
		}
		if len(resp.Data.Rows) == 0 {
			if isFirstPage {
				fmt.Println("no resource found")
				return nil
			}
		}

		// Process the first page
		if isFirstPage {
			// Start printing process
			pagePrinter.StartPrinting()
			// Prepare for printing, calculate column width and table header, etc.
			pagePrinter.PrepareForPrinting(&resp)
			isFirstPage = false
		}

		// Print the current page
		pagePrinter.PrintPage(&resp)

		// Update page token and loop counter
		pageToken = resp.Data.Page_token
		loopCount++
	}

	// Finish printing
	pagePrinter.Finish()

	logger.Debug("resource dirstribution response completed", zap.Int("pages", loopCount))
	return nil
}