// Copyright (C) 2023 The Licensing Authors
// SPDX-License-Identifier: MIT

package main

import (
	"flag"
	"os"
	"text/template"

	"github.com/Masterminds/sprig/v3"
)

const readme = `
{{- $gitea := .BaseURL.Gitea -}}
{{- $woodpecker := .BaseURL.Woodpecker -}}
<br/>
<br/>

<h3 align="center">⚒️ Libraries ⚒️</h3>

<div align="center">

| Language | Repository | Build Pipeline |
|----------|------------|----------------|
{{- range .Libraries }}
| {{ .Language }} | [{{ .Repository }}]({{ $gitea }}/{{ .Repository }}) | [![status-badge]({{ $woodpecker }}/api/badges/{{ .Build }}/status.svg)]({{ $woodpecker }}/repos/{{ .Build }}) |
{{- end }}

</div>

<br/>

<h3 align="center">⚒️ Tools and Technologies ⚒️</h3>

<p align="center">
{{- range .Tools }}
	{{- range . }}
	<img width="96" height="64" alt="{{ .Name }}" title="{{ .Name }}" src="https://cdn.jsdelivr.net/gh/devicons/devicon/icons/{{ .Devicon }}.svg" />&nbsp;
	{{- end }}
	<br/>
{{- end }}
</p>

<br/>
<br/>
`

type BaseURL struct {
	Gitea      string
	Woodpecker string
}

type Library struct {
	Language   string
	Repository string
	Build      string
}

type Tool struct {
	Name    string
	Devicon string
}

type TemplateData struct {
	BaseURL   BaseURL
	Libraries []Library
	Tools     [][]Tool
}

func main() {
	cli := flag.NewFlagSet("gen-readme", flag.ExitOnError)
	cli.SetOutput(os.Stderr)

	output := cli.String("", "-", "")

	err := cli.Parse(os.Args[1:])
	if err != nil {
		panic(err)
	}

	out := os.Stdout
	if output != nil && *output != "" && *output != "-" {
		out, err = os.Create(*output)
		if err != nil {
			panic(err)
		}

		defer out.Close()
	}

	t := template.Must(
		template.New("readme").
			Funcs(sprig.TxtFuncMap()).
			Parse(readme),
	)

	err = t.Execute(out, TemplateData{
		BaseURL: BaseURL{
			Gitea:      "https://code.pitz.tech",
			Woodpecker: "https://build.pitz.tech",
		},
		Libraries: []Library{
			{"Protobuf", "licensing/proto", "1"},
			{"Golang", "licensing/api-go", "2"},
			{"Rust", "licensing/api-rust", "3"},
			{"NodeJS", "licensing/api-node", ""},
		},
		Tools: [][]Tool{
			{
				{"Git", "git/git-plain"},
			},
			{
				{"Go", "go/go-original"},
				{"Rust", "rust/rust-plain"},
				{"NodeJS", "nodejs/nodejs-original"},
				{"TypeScript", "typescript/typescript-original"},
			},
			{
				{"SQLite", "sqlite/sqlite-original"},
				{"PostgreSQL", "postgresql/postgresql-original"},
				{"Redis", "redis/redis-original"},
			},
			{
				{"Prometheus", "prometheus/prometheus-original"},
				{"Grafana", "grafana/grafana-original"},
			},
		},
	})

	if err != nil {
		panic(err)
	}
}