package modules

import (
	"fmt"
	"os"
	"slices"
	"sort"

	"git.frostfs.info/TrueCloudLab/s3-tests-parser/internal/s3"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var testsCmd = &cobra.Command{
	Use:   "tests",
	Short: "Print tests to check",
	Long:  "Print all tests that will be checked by 'compatibility' command",
	Example: `s3-tests-parser tests
s3-tests-parser tests --output tests.txt`,
	RunE: runTestsCmd,
}

func initTestsCmd() {
	testsCmd.Flags().String(outputFlag, "", "file to write output, if missed the stdout is used")
}

func runTestsCmd(cmd *cobra.Command, _ []string) error {
	testStruct, err := s3.ParseTestsStruct()
	if err != nil {
		return err
	}

	var tests []string

	groupTests := make(map[string][]string)
	for _, group := range testStruct.Groups {
		if group.Skip {
			continue
		}
		groupTests[group.Name] = group.Tests
	}

	for _, group := range testStruct.Groups {
		if group.Skip {
			continue
		}

		tests = append(tests, group.Tests...)
		for _, include := range group.Include {
			tests = append(tests, groupTests[include]...)
		}
	}

	sort.Strings(tests)
	tests = slices.Compact(tests)

	return printTests(cmd, tests)
}

func printTests(cmd *cobra.Command, res []string) error {
	w := cmd.OutOrStdout()
	if outFile := viper.GetString(outputFlag); outFile != "" {
		f, err := os.Create(outFile)
		if err != nil {
			return fmt.Errorf("create out file: %w", err)
		}
		w = f
		defer f.Close()
	}

	for i := range res {
		if _, err := fmt.Fprintln(w, res[i]); err != nil {
			return err
		}
	}

	return nil
}