package build

import (
	commonv1 "code.icb4dc0.de/buildr/api/generated/common/v1"
	sdk "code.icb4dc0.de/buildr/wasi-module-sdk-go"
)

func (g GoBuild) Help() sdk.Help {
	return sdk.Help{
		Name: "Go build - build Go binaries",
		Description: `This module helps to build Go binaries.
It abstracts common build parameters like GOOS and GOARCH.
Less common parameters can be specified e.g. with ` + "`flags`" + ` or ` + "`ldflags`" + `.
Builds - as every other task - are executed in parallel.`,
		Examples: []sdk.Example{
			{
				Name:        "Simple build",
				Description: "Simplest possible example of a build",
				Spec: sdk.TaskSpec[sdk.Module]{
					ModuleName: "buildr_linux_amd64",
					Module: GoBuild{
						Binary: "buildr",
						Main:   ".",
						GoOS:   "linux",
						GoArch: "amd64",
					},
				},
			},
			{
				Name:        "Build with flags",
				Description: `Specify normal build flags as well as ldflags.`,
				Spec: sdk.TaskSpec[sdk.Module]{
					ModuleName: "buildr_linux_amd64",
					Module: GoBuild{
						Binary: "buildr",
						Main:   ".",
						GoOS:   "linux",
						GoArch: "amd64",
						Flags: []string{
							"-v",
							"-trimpath",
							"-a",
							"-installsuffix=cgo",
						},
						LdFlags: []string{
							"-w -s",
							"-X 'code.icb4dc0.de/buildr/buildr/cmd.CurrentVersion=main'",
						},
					},
				},
			},
			{
				Name:        "Build with environment variables",
				Description: `Specify additional environment variables.`,
				Spec: sdk.TaskSpec[sdk.Module]{
					ModuleName: "buildr_linux_amd64",
					Module: GoBuild{
						Binary: "buildr",
						Main:   ".",
						GoOS:   "linux",
						GoArch: "amd64",
						Env: map[string]string{
							"CGO_ENABLED": "0",
						},
					},
				},
			},
			{
				Name: "Containerize build process",
				Description: `It is also possible to run the build in a container.
Although it is not very effective because the build process always has to download all dependencies if they are not cached.`,
				Spec: sdk.TaskSpec[sdk.Module]{
					ModuleName: "buildr_linux_amd64",
					Container: &commonv1.ContainerSpec{
						Image: "golang:alpine",
					},
					Module: GoBuild{
						Binary: "buildr",
						Main:   ".",
						GoOS:   "linux",
						GoArch: "amd64",
					},
				},
			},
			{
				Name:        "Containerize build process - with module cache volume",
				Description: `Specify additional environment variables.`,
				Spec: sdk.TaskSpec[sdk.Module]{
					ModuleName: "buildr_linux_amd64",
					Container: &commonv1.ContainerSpec{
						Image: "golang:alpine",
						VolumeMounts: []*commonv1.ContainerVolumeMount{
							{
								Target: "/go/pkg/mod",
								Name:   "modcache",
							},
						},
					},
					Module: GoBuild{
						Binary: "buildr",
						Main:   ".",
						GoOS:   "linux",
						GoArch: "amd64",
					},
				},
			},
		},
	}
}