package cli

import (
	"fmt"
	"io"

	"gitea.maximumdirect.net/eric/distributor/internal/app"
)

type sourceDiagnosticArgs struct {
	Path         string
	ConfigPath   string
	PipelineID   string
	BundlePath   string
	OutputFormat app.OutputFormat
}

func parseSourceDiagnosticArgs(stderr io.Writer, command string, args []string) (sourceDiagnosticArgs, bool) {
	flags := newFlagSet(command, stderr)
	configPath := flags.String("config", "", "path to config file")
	pipelineID := flags.String("pipeline", "", "pipeline id")
	bundlePath := flags.String("bundle", "", "source-root-relative bundle path")
	formatFlag := addFormatFlag(flags)
	if err := flags.Parse(args); err != nil {
		return sourceDiagnosticArgs{}, false
	}
	format, ok := parseOutputFormat(stderr, command, *formatFlag)
	if !ok {
		return sourceDiagnosticArgs{}, false
	}
	path, ok := parseOptionalPathArg(stderr, command, flags.Args())
	if !ok {
		return sourceDiagnosticArgs{}, false
	}
	if !validateInspectModeOK(stderr, command, path, *configPath, *pipelineID, *bundlePath) {
		return sourceDiagnosticArgs{}, false
	}
	return sourceDiagnosticArgs{
		Path:         path,
		ConfigPath:   *configPath,
		PipelineID:   *pipelineID,
		BundlePath:   *bundlePath,
		OutputFormat: format,
	}, true
}

func validateInspectModeOK(stderr io.Writer, command, path, configPath, pipelineID, bundlePath string) bool {
	configMode := configPath != "" || pipelineID != "" || bundlePath != ""
	if !configMode {
		return true
	}
	if path != "" {
		fmt.Fprintf(stderr, "distributor: %s does not accept a local path with --config, --pipeline, or --bundle\n", command)
		return false
	}
	if configPath == "" {
		fmt.Fprintf(stderr, "distributor: %s requires --config when --pipeline or --bundle is set\n", command)
		return false
	}
	if pipelineID == "" {
		fmt.Fprintf(stderr, "distributor: %s requires --pipeline in config mode\n", command)
		return false
	}
	return true
}