pluralise draw only if entries>1

update the README with more examples.

README.md

@@ -0,0 +1,73 @@
+![Windows](https://img.shields.io/badge/Windows-0078D6?style=for-the-badge&logo=windows&logoColor=white)
+![Linux](https://img.shields.io/badge/Linux-FCC624?style=for-the-badge&logo=linux&logoColor=black)
+![macOS](https://img.shields.io/badge/mac%20os-000000?style=for-the-badge&logo=macos&logoColor=F0F0F0)
+
+# lottery
+
+Play National Lottery games from your terminal.
+
+![Selection Prompt](./img/selectionprompt.png)
+
+![Draw](./img/draw.png)
+
+## Install
+
+```console
+go install github.com/onyx-and-iris/lottery-cli/cmd/lottery@latest
+```
+
+## Configuration
+
+*flags*
+
+-   --kind/-k: The kind of lottery.
+-   --count/-c: Number of draws to generate.
+-   --count-prompt/-C: Prompt for the number of draws to generate.
+> Note. If both --count and --count-prompt are passed the count prompt will win.
+
+*environment variables*
+
+```bash
+#!/usr/bin/env bash
+
+export LOTTERY_KIND=lotto
+export LOTTERY_COUNT=3
+export LOTTERY_COUNT_PROMPT=false
+```
+
+## Use
+
+Run with the selection prompt without prompting for a count:
+
+```console
+lottery
+```
+
+Run with the selection prompt but also prompt for a count:
+
+```console
+lottery --count-prompt
+```
+
+Run with the selection prompt but pass in the count directly:
+
+```console
+lottery --count=4
+```
+
+Run a single draw directly:
+
+```console
+lottery -k=euromillions 
+```
+
+Run multiple draws directly:
+
+```console
+lottery -k=euromillions -c=3
+```
+
+## Special Thanks
+
+-   [spf13](https://github.com/spf13) for the [cobra](https://github.com/spf13/cobra) and [viper](https://github.com/spf13/viper) packages.
+-   [Charm](https://github.com/charmbracelet) developers for the [fang](https://github.com/charmbracelet/fang), [lipgloss](https://github.com/charmbracelet/lipgloss) and [huh](https://github.com/charmbracelet/huh) packages.

Taskfile.yaml

@@ -0,0 +1,65 @@
+version: '3'
+
+vars:
+  PROGRAM: lottery
+  SHELL: '{{if eq .OS "Windows_NT"}}powershell{{end}}'
+  BIN_DIR: bin
+  VERSION:
+    sh: 'git describe --tags $(git rev-list --tags --max-count=1)'
+
+  WINDOWS: '{{.BIN_DIR}}/{{.PROGRAM}}_windows_amd64.exe'
+  LINUX: '{{.BIN_DIR}}/{{.PROGRAM}}_linux_amd64'
+  MACOS: '{{.BIN_DIR}}/{{.PROGRAM}}_darwin_amd64'
+
+tasks:
+  default:
+    desc: Build the lottery project
+    cmds:
+      - task: build
+
+  build:
+    desc: Build the lottery project
+    deps: [vet]
+    cmds:
+      - task: build-windows
+      - task: build-linux
+      - task: build-macos
+
+  vet:
+    desc: Vet the code
+    deps: [fmt]
+    cmds:
+      - go vet ./...
+
+  fmt:
+    desc: Fmt the code
+    cmds:
+      - go fmt ./...
+
+  build-windows:
+    desc: Build the lottery project for Windows
+    cmds:
+      - GOOS=windows GOARCH=amd64 go build -o {{.WINDOWS}} -ldflags="-X main.version={{.VERSION}}" ./cmd/{{.PROGRAM}}/
+    internal: true
+
+  build-linux:
+    desc: Build the lottery project for Linux
+    cmds:
+      - GOOS=linux GOARCH=amd64 go build -o {{.LINUX}} -ldflags="-X main.version={{.VERSION}}" ./cmd/{{.PROGRAM}}/
+    internal: true
+
+  build-macos:
+    desc: Build the lottery project for macOS
+    cmds:
+      - GOOS=darwin GOARCH=amd64 go build -o {{.MACOS}} -ldflags="-X main.version={{.VERSION}}" ./cmd/{{.PROGRAM}}/
+    internal: true
+
+  test:
+    desc: Run tests
+    cmds:
+      - go test ./...
+
+  clean:
+    desc: Clean the build artifacts
+    cmds:
+      - '{{.SHELL}} rm -r {{.BIN_DIR}}'

cmd/lottery/main.go

@@ -9,8 +9,10 @@ import (
 
 	"charm.land/huh/v2"
 	"github.com/charmbracelet/fang"
-	"github.com/onyx-and-iris/lottery-cli"
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/onyx-and-iris/lottery-cli"
 )
 
 var version string
@@ -30,9 +32,19 @@ func versionFromBuild() string {
 var cmd = &cobra.Command{
 	Use:   "lottery",
 	Short: "A CLI for National Lottery games.",
+	PreRunE: func(cmd *cobra.Command, args []string) error {
+		kindStr := viper.GetString("kind")
+		if kindStr != "" {
+			_, err := lottery.ParseKind(kindStr)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	},
 	RunE: func(cmd *cobra.Command, args []string) error {
-		var selected string
-
+		kindStr := viper.GetString("kind")
+		if kindStr == "" {
 			form := huh.NewForm(
 				huh.NewGroup(
 					huh.NewSelect[string]().
@@ -40,19 +52,20 @@ var cmd = &cobra.Command{
 						Options(
 							huh.NewOption("Lotto", "lotto"),
 							huh.NewOption("EuroMillions", "euromillions"),
-						huh.NewOption("SetForLife", "setforlife"),
+							huh.NewOption("Set For Life", "setforlife"),
 							huh.NewOption("Thunderball", "thunderball"),
 							huh.NewOption("Powerball", "powerball"),
 						).
-					Value(&selected),
+						Value(&kindStr),
 				),
 			)
 			err := form.Run()
 			if err != nil {
 				return err
 			}
+		}
 
-		kind, err := lottery.ParseKind(selected)
+		kind, err := lottery.ParseKind(kindStr)
 		if err != nil {
 			return err
 		}
@@ -61,15 +74,62 @@ var cmd = &cobra.Command{
 		if err != nil {
 			return err
 		}
+
+		if countPrompt := viper.GetBool("count-prompt"); countPrompt {
+			var count string
+			countPrompt := huh.NewForm(
+				huh.NewGroup(
+					huh.NewInput().
+						Title("How many draws would you like to generate?").
+						Value(&count),
+				),
+			)
+			err := countPrompt.Run()
+			if err != nil {
+				return err
+			}
+			viper.Set("count", count)
+		}
+
+		count := viper.GetInt("count")
+		includeDrawHeading := count > 1
+		renders := make([]string, 0, count)
+		drawTitle := "Lottery"
+
+		for i := range count {
 			l.Draw()
-		fmt.Println(renderDraw(l))
+			title, entry := renderDrawEntry(l, i+1, includeDrawHeading)
+			drawTitle = title
+			renders = append(renders, entry)
+		}
+
+		if len(renders) > 0 {
+			fmt.Println(renderDrawCollection(drawTitle, renders))
+		}
 
 		return nil
 	},
 }
 
+func init() {
+	cmd.Flags().StringP("kind", "k", "", "Lottery kind to generate draws for.")
+	cmd.Flags().IntP("count", "c", 1, "Number of draws to generate.")
+	cmd.Flags().BoolP("count-prompt", "C", false, "Prompt for the number of draws to generate.")
+
+	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	viper.SetEnvPrefix("LOTTERY")
+	viper.AutomaticEnv()
+	if err := viper.BindPFlags(cmd.Flags()); err != nil {
+		panic(err)
+	}
+}
+
 func main() {
-	if err := fang.Execute(context.Background(), cmd, fang.WithVersion(versionFromBuild())); err != nil {
+	if err := fang.Execute(
+		context.Background(),
+		cmd,
+		fang.WithVersion(versionFromBuild()),
+	); err != nil {
 		os.Exit(1)
 	}
 }

cmd/lottery/render.go

@@ -5,9 +5,28 @@ import (
 	"strings"
 
 	"charm.land/lipgloss/v2"
+
 	"github.com/onyx-and-iris/lottery-cli"
 )
 
+// nolint:misspell
+var (
+	titleStyle       = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("12"))
+	drawHeadingStyle = lipgloss.NewStyle().
+				Bold(true).
+				Underline(true).
+				Foreground(lipgloss.Color("14"))
+	labelStyle     = lipgloss.NewStyle().Foreground(lipgloss.Color("8"))
+	numbersStyle   = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("10"))
+	specialStyle   = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("11"))
+	separatorStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("8"))
+	cardStyle      = lipgloss.NewStyle().
+			BorderStyle(lipgloss.RoundedBorder()).
+			BorderForeground(lipgloss.Color("8")).
+			Padding(0, 1).
+			MarginTop(1)
+)
+
 func formatNumberList(numbers []int) string {
 	parts := make([]string, len(numbers))
 	for i, n := range numbers {
@@ -16,46 +35,117 @@ func formatNumberList(numbers []int) string {
 	return strings.Join(parts, "  ")
 }
 
-func renderDraw(l lottery.Lottery) string {
-	titleStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("12"))
-	labelStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("8"))
-	numbersStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("10"))
-	specialStyle := lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("11"))
-
+func drawTitleAndLines(l lottery.Lottery) (string, []string) {
 	var title string
 	var lines []string
 
 	switch game := l.(type) {
 	case *lottery.Lotto:
 		title = "Lotto"
-		lines = append(lines, labelStyle.Render("Numbers:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])))
+		lines = append(
+			lines,
+			labelStyle.Render(
+				"Numbers:",
+			)+" "+numbersStyle.Render(
+				formatNumberList(game.Numbers[:]),
+			),
+		)
 	case *lottery.EuroMillions:
 		title = "EuroMillions"
-		lines = append(lines, labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])))
-		lines = append(lines, labelStyle.Render("Lucky Stars:")+" "+specialStyle.Render(formatNumberList(game.LuckyStars[:])))
+		lines = append(
+			lines,
+			labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])),
+		)
+		lines = append(
+			lines,
+			labelStyle.Render(
+				"Lucky Stars:",
+			)+" "+specialStyle.Render(
+				formatNumberList(game.LuckyStars[:]),
+			),
+		)
 	case *lottery.SetForLife:
 		title = "Set For Life"
-		lines = append(lines, labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])))
-		lines = append(lines, labelStyle.Render("Life Ball:")+" "+specialStyle.Render(strconv.Itoa(game.LifeBall)))
+		lines = append(
+			lines,
+			labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])),
+		)
+		lines = append(
+			lines,
+			labelStyle.Render("Life Ball:")+" "+specialStyle.Render(strconv.Itoa(game.LifeBall)),
+		)
 	case *lottery.Thunderball:
 		title = "Thunderball"
-		lines = append(lines, labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])))
-		lines = append(lines, labelStyle.Render("Thunderball:")+" "+specialStyle.Render(strconv.Itoa(game.Thunderball)))
+		lines = append(
+			lines,
+			labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])),
+		)
+		lines = append(
+			lines,
+			labelStyle.Render(
+				"Thunderball:",
+			)+" "+specialStyle.Render(
+				strconv.Itoa(game.Thunderball),
+			),
+		)
 	case *lottery.Powerball:
 		title = "Powerball"
-		lines = append(lines, labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])))
-		lines = append(lines, labelStyle.Render("Powerball:")+" "+specialStyle.Render(strconv.Itoa(game.Powerball)))
+		lines = append(
+			lines,
+			labelStyle.Render("Main:")+" "+numbersStyle.Render(formatNumberList(game.Numbers[:])),
+		)
+		lines = append(
+			lines,
+			labelStyle.Render("Powerball:")+" "+specialStyle.Render(strconv.Itoa(game.Powerball)),
+		)
 	default:
 		title = "Lottery"
 		lines = append(lines, "Unknown lottery type")
 	}
 
-	body := strings.Join(lines, "\n")
-	card := lipgloss.NewStyle().
-		BorderStyle(lipgloss.RoundedBorder()).
-		BorderForeground(lipgloss.Color("8")).
-		Padding(0, 1).
-		MarginTop(1)
-
-	return card.Render(titleStyle.Render(title+" draw") + "\n" + body)
+	return title, lines
+}
+
+func renderDrawEntry(l lottery.Lottery, drawNumber int, includeHeading bool) (string, string) {
+	title, lines := drawTitleAndLines(l)
+
+	entry := make([]string, 0, len(lines)+1)
+	if includeHeading {
+		entry = append(entry, drawHeadingStyle.Render("Draw "+strconv.Itoa(drawNumber)))
+	}
+	entry = append(entry, lines...)
+
+	return title, strings.Join(entry, "\n")
+}
+
+func maxLineWidth(blocks []string) int {
+	maxWidth := 0
+	for _, block := range blocks {
+		for line := range strings.SplitSeq(block, "\n") {
+			width := lipgloss.Width(line)
+			if width > maxWidth {
+				maxWidth = width
+			}
+		}
+	}
+	if maxWidth < 12 {
+		return 12
+	}
+	return maxWidth
+}
+
+func renderDrawCollection(title string, entries []string) string {
+	if len(entries) == 0 {
+		return ""
+	}
+
+	separator := separatorStyle.Render(strings.Repeat("─", maxLineWidth(entries)))
+	body := strings.Join(entries, "\n"+separator+"\n")
+	if len(entries) == 1 {
+		title = titleStyle.Render(title + " draw")
+	} else {
+		title = titleStyle.Render(title + " draws")
+	}
+
+	return cardStyle.Render(title + "\n" + body)
 }

go.mod

@@ -7,6 +7,7 @@ require (
 	charm.land/lipgloss/v2 v2.0.5
 	github.com/charmbracelet/fang v1.0.0
 	github.com/spf13/cobra v1.10.2
+	github.com/spf13/viper v1.21.0
 )
 
 require (
@@ -26,6 +27,8 @@ require (
 	github.com/clipperhouse/displaywidth v0.11.0 // indirect
 	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.4.0 // indirect
 	github.com/mattn/go-runewidth v0.0.23 // indirect
@@ -35,10 +38,17 @@ require (
 	github.com/muesli/mango-cobra v1.2.0 // indirect
 	github.com/muesli/mango-pflag v0.1.0 // indirect
 	github.com/muesli/roff v0.1.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/spf13/pflag v1.0.9 // indirect
+	github.com/sagikazarmark/locafero v0.11.0 // indirect
+	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
+	github.com/spf13/afero v1.15.0 // indirect
+	github.com/spf13/cast v1.10.0 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.46.0 // indirect
-	golang.org/x/text v0.24.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
 )

go.sum

@@ -53,8 +53,20 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
+github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
+github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
+github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
+github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
+github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lucasb-eyer/go-colorful v1.4.0 h1:UtrWVfLdarDgc44HcS7pYloGHJUjHV/4FwW4TvVgFr4=
 github.com/lucasb-eyer/go-colorful v1.4.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mattn/go-runewidth v0.0.23 h1:7ykA0T0jkPpzSvMS5i9uoNn2Xy3R383f9HDx3RybWcw=
@@ -71,19 +83,37 @@ github.com/muesli/mango-pflag v0.1.0 h1:UADqbYgpUyRoBja3g6LUL+3LErjpsOwaC9ywvBWe
 github.com/muesli/mango-pflag v0.1.0/go.mod h1:YEQomTxaCUp8PrbhFh10UfbhbQrM/xJ4i2PB8VTLLW0=
 github.com/muesli/roff v0.1.0 h1:YD0lalCotmYuF5HhZliKWlIx7IEhiXeSfq7hNjFqGF8=
 github.com/muesli/roff v0.1.0/go.mod h1:pjAHQM9hdUUwm/krAfrLGgJkXJ+YuhtsfZ42kieB2Ig=
+github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
+github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
+github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/sagikazarmark/locafero v0.11.0 h1:1iurJgmM9G3PA/I+wWYIOw/5SyBtxapeHDcg+AAIFXc=
+github.com/sagikazarmark/locafero v0.11.0/go.mod h1:nVIGvgyzw595SUSUE6tvCp3YYTeHs15MvlmU87WwIik=
+github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 h1:+jumHNA0Wrelhe64i8F6HNlS8pkoyMv5sreGx2Ry5Rw=
+github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8/go.mod h1:3n1Cwaq1E1/1lhQhtRK2ts/ZwZEhjcQeJQ1RuC6Q/8U=
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+github.com/spf13/cast v1.10.0 h1:h2x0u2shc1QuLHfxi+cTJvs30+ZAHOGRic8uyGTDWxY=
+github.com/spf13/cast v1.10.0/go.mod h1:jNfB8QC9IA6ZuY2ZjDp0KtFO2LZZlg4S/7bzP6qqeHo=
 github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=
 github.com/spf13/cobra v1.10.2/go.mod h1:7C1pvHqHw5A4vrJfjNwvOdzYu0Gml16OCs2GRiTUUS4=
-github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
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+github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
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+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
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+github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
+go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d h1:jtJma62tbqLibJ5sFQz8bKtEM8rJBtfilJ2qTU199MI=
 golang.org/x/exp v0.0.0-20231006140011-7918f672742d/go.mod h1:ldy0pHrwJyGW56pPQzzkH36rKxoZW1tw7ZJpeKx+hdo=
@@ -91,8 +121,10 @@ golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
 golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
 golang.org/x/sys v0.46.0 h1:noSf2Fq6F8DBgS+LysIkx7rIExoNHJsxOAtPp4rthXw=
 golang.org/x/sys v0.46.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
-golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
-golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
+golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
+golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

kinds.go

@@ -25,6 +25,9 @@ func ParseKind(kind string) (Kind, error) {
 	case "powerball":
 		return KindPowerball, nil
 	default:
-		return "", fmt.Errorf("invalid lottery kind: %s", kind)
+		return "", fmt.Errorf(
+			"invalid lottery kind: %s, must be one of: lotto, euromillions, setforlife, thunderball, powerball",
+			kind,
+		)
 	}
 }

util.go

@@ -8,8 +8,8 @@ import (
 // drawUnique returns count unique numbers in the range [1, max].
 // It uses the rand.Perm function to generate a random permutation of numbers and selects the first count numbers from it.
 // The result is sorted before being returned.
-func drawUnique(count, max int) []int {
-	perm := rand.Perm(max)
+func drawUnique(count, maxNum int) []int {
+	perm := rand.Perm(maxNum)
 	result := make([]int, count)
 	for i := range result {
 		result[i] = perm[i] + 1