package main

import (
	"bytes"
	"fmt"
	"html"
	"net/url"
	"slices"
	"strings"
)

type SvgWriter struct {
	ypos   float64
	header []byte
	out    bytes.Buffer
}

const (
	SvgType_Package = iota
	SvgType_Project
)

func NewSvg(SvgType int) *SvgWriter {
	svg := &SvgWriter{}
	svg.header = []byte(`<svg version="2.0" overflow="auto" width="40ex" height="`)
	svg.out.WriteString(`em" xmlns="http://www.w3.org/2000/svg">`)
	switch SvgType {
	case SvgType_Package:
		svg.out.WriteString(`<defs>
	    <g id="s">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="green" fill="#efe" rx="5" />
	      <text x="2.5ex" y="1.1em">succeeded</text>
	    </g>
	    <g id="f">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="red" fill="#fee" rx="5" />
	      <text x="5ex" y="1.1em">failed</text>
	    </g>
	    <g id="b">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="grey" fill="#fbf" rx="5" />
	      <text x="3.75ex" y="1.1em">blocked</text>
	    </g>
	    <g id="broken">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="grey" fill="#fff" rx="5" />
	      <text x="4.5ex" y="1.1em" stroke="red" fill="red">broken</text>
	    </g>
	    <g id="build">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="yellow" fill="#664" rx="5" />
	      <text x="3.75ex" y="1.1em" fill="yellow">building</text>
	    </g>
	    <g id="u">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="yellow" fill="#555" rx="5" />
	    <text x="2ex" y="1.1em" fill="orange">unresolvable</text>
	    </g>
	    <g id="scheduled">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="blue" fill="none" rx="5" />
	      <text x="3ex" y="1.1em" stroke="none" fill="blue">scheduled</text>
	    </g>
	    <g id="d">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="grey" fill="none" rx="5" />
	      <text x="4ex" y="1.1em" stroke="none" fill="grey">disabled</text>
	    </g>
	    <g id="e">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="grey" fill="none" rx="5" />
	      <text x="4ex" y="1.1em" stroke="none" fill="#aaf">excluded</text>
	    </g>
	    <g id="un">
	      <rect width="15ex" height="1.5em" stroke-width="1" stroke="grey" fill="none" rx="5" />
	      <text x="4ex" y="1.1em" stroke="none" fill="grey">unknown</text>
	    </g>
		<rect id="repotitle" width="100%" height="2em" stroke-width="1" stroke="grey" fill="grey" rx="2" />
	  </defs>`)

	case SvgType_Project:
		svg.out.WriteString(`<defs>
		</defs>`)
	}

	return svg
}

func (svg *SvgWriter) WriteTitle(title string) {
	svg.out.WriteString(`<text stroke="black" fill="black" x="1ex" y="` + fmt.Sprint(svg.ypos-.5) + `em">` + html.EscapeString(title) + "</text>")
	svg.ypos += 2.5

}

func (svg *SvgWriter) WriteSubtitle(subtitle string) {
	svg.out.WriteString(`<use href="#repotitle" y="` + fmt.Sprint(svg.ypos-2) + `em"/>`)
	svg.out.WriteString(`<text stroke="black" fill="black" x="3ex" y="` + fmt.Sprint(svg.ypos-.6) + `em">` + html.EscapeString(subtitle) + `</text>`)
	svg.ypos += 2
}

func (svg *SvgWriter) WritePackageStatus(loglink, arch, status, detail string) {
	StatusToSVG := func(S string) string {
		switch S {
		case "succeeded":
			return "s"
		case "failed":
			return "f"
		case "broken", "scheduled":
			return S
		case "blocked":
			return "b"
		case "building":
			return "build"
		case "unresolvable":
			return "u"
		case "disabled":
			return "d"
		case "excluded":
			return "e"
		}
		return "un"
	}

	svg.out.WriteString(`<text fill="#113" x="5ex" y="` + fmt.Sprint(svg.ypos-.6) + `em">` + html.EscapeString(arch) + `</text>`)
	svg.out.WriteString(`<g>`)
	if len(loglink) > 0 {
		u, err := url.Parse(loglink)
		if err == nil {
			svg.out.WriteString(`<a href="` + u.String() + `" target="_blank" rel="noopener">`)
		}
	}
	svg.out.WriteString(`<use href="#` + StatusToSVG(status) + `" x="20ex" y="` + fmt.Sprint(svg.ypos-1.7) + `em"/>`)
	if len(loglink) > 0 {
		svg.out.WriteString(`</a>`)
	}
	if len(detail) > 0 {
		svg.out.WriteString(`<title>` + html.EscapeString(detail) + "</title>")
	}

	svg.out.WriteString("</g>\n")
	svg.ypos += 2
}

func (svg *SvgWriter) WriteProjectStatus(project, repo, arch, status string, count int) {
	u, err := url.Parse(*ObsUrl + "/project/monitor/" + url.PathEscape(project) + "?defaults=0&amp;" + url.QueryEscape(status) + "=1&amp;arch_" + url.QueryEscape(arch) + "=1&amp;repo_" + url.QueryEscape(strings.ReplaceAll(repo, ".", "_")) + "=1")
	if err != nil {
		return
	}

	svg.out.WriteString(`<g><a href="` + u.String() + `" target="_blank" rel="noopener">` + "\n" +
		`<text fill="#113" x="5ex" y="` + fmt.Sprint(svg.ypos-0.6) + "em\">\n" +
		html.EscapeString(status+": ") + fmt.Sprint(count) + "</text></a></g>\n")
	svg.ypos += 2
}

func (svg *SvgWriter) GenerateSvg() []byte {
	return slices.Concat(svg.header, []byte(fmt.Sprint(svg.ypos)), svg.out.Bytes(), []byte("</svg>"))
}