import {Fragment} from 'react';
import styled from '@emotion/styled';

import {Alert} from 'sentry/components/alert';
import ExternalLink from 'sentry/components/links/externalLink';
import {StepType} from 'sentry/components/onboarding/gettingStartedDoc/step';
import type {
  Docs,
  DocsParams,
  OnboardingConfig,
} from 'sentry/components/onboarding/gettingStartedDoc/types';
import {t, tct} from 'sentry/locale';

type Params = DocsParams;

const getConfigureSnippet = (params: Params) => `
import (
  "fmt"
  "net/http"

  "github.com/getsentry/sentry-go"
  sentryecho "github.com/getsentry/sentry-go/echo"
  "github.com/labstack/echo/v4"
  "github.com/labstack/echo/v4/middleware"
)

// To initialize Sentry's handler, you need to initialize Sentry itself beforehand
if err := sentry.Init(sentry.ClientOptions{
  Dsn: "${params.dsn}",
  // Set TracesSampleRate to 1.0 to capture 100%
  // of transactions for performance monitoring.
  // We recommend adjusting this value in production,
  TracesSampleRate: 1.0,
}); err != nil {
  fmt.Printf("Sentry initialization failed: %v\n", err)
}

// Then create your app
app := echo.New()

app.Use(middleware.Logger())
app.Use(middleware.Recover())

// Once it's done, you can attach the handler as one of your middleware
app.Use(sentryecho.New(sentryecho.Options{}))

// Set up routes
app.GET("/", func(ctx echo.Context) error {
  return ctx.String(http.StatusOK, "Hello, World!")
})

// And run it
app.Logger.Fatal(app.Start(":3000"))`;

const getOptionsSnippet = () => `
// Repanic configures whether Sentry should repanic after recovery, in most cases it should be set to true,
// as echo includes its own Recover middleware that handles http responses.
Repanic bool
// WaitForDelivery configures whether you want to block the request before moving forward with the response.
// Because Echo's "Recover" handler doesn't restart the application,
// it's safe to either skip this option or set it to "false".
WaitForDelivery bool
// Timeout for the event delivery requests.
Timeout time.Duration`;

const getUsageSnippet = () => `
app := echo.New()

app.Use(middleware.Logger())
app.Use(middleware.Recover())

app.Use(sentryecho.New(sentryecho.Options{
  Repanic: true,
}))

app.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
  return func(ctx echo.Context) error {
    if hub := sentryecho.GetHubFromContext(ctx); hub != nil {
      hub.Scope().SetTag("someRandomTag", "maybeYouNeedIt")
    }
    return next(ctx)
  }
})

app.GET("/", func(ctx echo.Context) error {
  if hub := sentryecho.GetHubFromContext(ctx); hub != nil {
    hub.WithScope(func(scope *sentry.Scope) {
      scope.SetExtra("unwantedQuery", "someQueryDataMaybe")
      hub.CaptureMessage("User provided unwanted query string, but we recovered just fine")
    })
  }
  return ctx.String(http.StatusOK, "Hello, World!")
})

app.GET("/foo", func(ctx echo.Context) error {
  // sentryecho handler will catch it just fine. Also, because we attached "someRandomTag"
  // in the middleware before, it will be sent through as well
  panic("y tho")
})

app.Logger.Fatal(app.Start(":3000"))`;

const getBeforeSendSnippet = params => `
sentry.Init(sentry.ClientOptions{
  Dsn: "${params.dsn}",
  BeforeSend: func(event *sentry.Event, hint *sentry.EventHint) *sentry.Event {
    if hint.Context != nil {
      if req, ok := hint.Context.Value(sentry.RequestContextKey).(*http.Request); ok {
        // You have access to the original Request here
      }
    }

    return event
  },
})`;

const onboarding: OnboardingConfig = {
  install: () => [
    {
      type: StepType.INSTALL,
      description: tct('Install our Go Echo SDK using [code:go get]:', {
        code: <code />,
      }),
      configurations: [
        {
          language: 'bash',
          code: 'go get github.com/getsentry/sentry-go/echo',
        },
      ],
    },
  ],
  configure: params => [
    {
      type: StepType.CONFIGURE,
      description: t(
        "Import and initialize the Sentry SDK early in your application's setup:"
      ),
      configurations: [
        {
          language: 'go',
          code: getConfigureSnippet(params),
        },
        {
          description: (
            <Fragment>
              <strong>{t('Options')}</strong>
              <p>
                {tct(
                  '[sentryEchoCode:sentryecho] accepts a struct of [optionsCode:Options] that allows you to configure how the handler will behave.',
                  {sentryEchoCode: <code />, optionsCode: <code />}
                )}
              </p>
              {t('Currently it respects 3 options:')}
            </Fragment>
          ),
          language: 'go',
          code: getOptionsSnippet(),
        },
      ],
    },
    {
      title: t('Usage'),
      description: (
        <Fragment>
          <p>
            {tct(
              "[sentryEchoCode:sentryecho] attaches an instance of [sentryHubLink:*sentry.Hub] to the [echoContextCode:echo.Context], which makes it available throughout the rest of the request's lifetime. You can access it by using the [getHubFromContextCode:sentryecho.GetHubFromContext()] method on the context itself in any of your proceeding middleware and routes. And it should be used instead of the global [captureMessageCode:sentry.CaptureMessage], [captureExceptionCode:sentry.CaptureException] or any other calls, as it keeps the separation of data between the requests.",
              {
                sentryEchoCode: <code />,
                sentryHubLink: (
                  <ExternalLink href="https://godoc.org/github.com/getsentry/sentry-go#Hub" />
                ),
                echoContextCode: <code />,
                getHubFromContextCode: <code />,
                captureMessageCode: <code />,
                captureExceptionCode: <code />,
              }
            )}
          </p>
          <AlertWithoutMarginBottom>
            {tct(
              "Keep in mind that [sentryHubCode:*sentry.Hub] won't be available in middleware attached before [sentryEchoCode:sentryecho]!",
              {sentryEchoCode: <code />, sentryHubCode: <code />}
            )}
          </AlertWithoutMarginBottom>
        </Fragment>
      ),
      configurations: [
        {
          language: 'go',
          code: getUsageSnippet(),
        },
        {
          description: (
            <strong>
              {tct('Accessing Request in [beforeSendCode:BeforeSend] callback', {
                beforeSendCode: <code />,
              })}
            </strong>
          ),
          language: 'go',
          code: getBeforeSendSnippet(params),
        },
      ],
    },
  ],
  verify: () => [],
};

const docs: Docs = {
  onboarding,
};

export default docs;

const AlertWithoutMarginBottom = styled(Alert)`
  margin-bottom: 0;
`;