package commands

import (
	"fmt"
	"strings"

	giteaSdk "code.gitea.io/sdk/gitea"
	"github.com/spf13/cobra"

	"code.icb4dc0.de/prskr/nitter/nitters/gitea"
)

type reviewStateTypeValue giteaSdk.ReviewStateType

func (r *reviewStateTypeValue) String() string {
	return string(*r)
}

func (r *reviewStateTypeValue) Set(s string) error {
	switch strings.ToUpper(s) {
	case string(giteaSdk.ReviewStateApproved):
		*r = reviewStateTypeValue(giteaSdk.ReviewStateApproved)
		return nil
	case string(giteaSdk.ReviewStateRequestChanges):
		*r = reviewStateTypeValue(giteaSdk.ReviewStateRequestChanges)
		return nil
	case string(giteaSdk.ReviewStateComment):
		*r = reviewStateTypeValue(giteaSdk.ReviewStateComment)
		return nil
	default:
		return fmt.Errorf("value %s doesn't match any expected state type", s)
	}
}

func (r *reviewStateTypeValue) Type() string {
	return "string"
}

var errorReviewStateType = reviewStateTypeValue(giteaSdk.ReviewStateComment)

//nolint:lll //flag setup causes long lines
func Gitea() *cobra.Command {
	giteaCmd := &cobra.Command{
		Use:   "gitea",
		Short: "Parent command to Gitea related actions",
	}

	giteaCmd.PersistentFlags().StringP("base-address", "a", "", "Base URL of your Gitea/Forgejo instance [$NITTER_BASE_ADDRESS]")
	giteaCmd.PersistentFlags().StringP("token", "t", "", "Access token to interact with Gitea/Forgejo API [$NITTER_TOKEN]")

	pr := &cobra.Command{
		Use:     "pull-request",
		Short:   "Read golangci-lint result and create a PR review",
		Aliases: []string{"merge-request", "pr", "pull"},
		RunE:    runGiteaPRNitting,
	}

	pr.Flags().Int64P(
		"pull-index",
		"i",
		-1,
		"PR index to add reviews to - note, this is not the ID of the PR but its number [$NITTER_PULL_INDEX]",
	)

	pr.Flags().Var(&errorReviewStateType, "review-state", "state in which to create the review if there are issues [comment,approved,]")
	pr.Flags().StringP("result-file", "f", "", "path to the golangci-lint JSON output [$NITTER_RESULT_FILE]")

	lintPr := &cobra.Command{
		Use:     "lint-pull-request",
		Short:   "Run golangci-lint directly and create a PR review based on the captured results - required golangci-lint being in $PATH",
		Aliases: []string{"lint-pr", "lint-pull"},
		RunE:    runGiteaPRLintNitting,
	}

	lintPr.Flags().Var(&errorReviewStateType, "review-state", "state in which to create the review if there are issues [comment,approved,]")

	lintPr.Flags().Int64P(
		"pull-index",
		"i",
		-1,
		"PR index to add reviews to - note, this is not the ID of the PR but its number [$NITTER_PULL_INDEX]",
	)

	lintPr.Flags().Bool(
		"from-pr-base",
		false,
		"if enabled, nitter will get the PRs metadata and start golangci-lint with --new-from-rev=<PR base commit>",
	)

	lintPr.Flags().StringSlice(
		"golangci-lint-extra-args",
		nil,
		"Extra args to append to golangci-lint run commands, keep in mind that out-format will be set to JSON and --new-from-rev if you enable --from-pr-base",
	)

	giteaCmd.AddCommand(pr, lintPr)

	return giteaCmd
}

func runGiteaPRNitting(cmd *cobra.Command, args []string) error {
	cfg, err := LoadConfig[gitea.GiteaPRConfig](cmd.Flags())
	if err != nil {
		return err
	}

	if err = cfg.Validate(); err != nil {
		return err
	}

	report, issues, err := ReadResultsFile(cmd.Flag("result-file").Value.String())
	if err != nil {
		return err
	}

	giteaClient, err := giteaSdk.NewClient(cfg.BaseAddress, giteaSdk.SetContext(cmd.Context()), giteaSdk.SetToken(cfg.Token))
	if err != nil {
		return err
	}

	nitter := gitea.NewPRNitter(giteaClient, cfg)

	return nitter.Report(report, issues)
}

func runGiteaPRLintNitting(cmd *cobra.Command, args []string) error {
	cfg, err := LoadConfig[gitea.GiteaPRLintConfig](cmd.Flags())
	if err != nil {
		return err
	}

	if err = cfg.Validate(); err != nil {
		return err
	}

	giteaClient, err := giteaSdk.NewClient(cfg.BaseAddress, giteaSdk.SetContext(cmd.Context()), giteaSdk.SetToken(cfg.Token))
	if err != nil {
		return err
	}

	if cfg.FromPRBase {
		var pr *giteaSdk.PullRequest
		if pr, _, err = giteaClient.GetPullRequest(cfg.Namespace, cfg.Repo, cfg.PRIndex); err != nil {
			return err
		} else {
			cfg.ExtraArgs = append(cfg.ExtraArgs, fmt.Sprintf("--new-from-rev=%s", pr.Base.Sha))
		}
	}

	report, issues, err := RunGolangCiLint(cmd.Context(), cfg.ExtraArgs)
	if err != nil {
		return err
	}

	nitter := gitea.NewPRNitter(giteaClient, &cfg.GiteaPRConfig)

	return nitter.Report(report, issues)
}