package licenses_test

import (
	"html/template"
	"strings"
	"testing"

	"atcr.io/pkg/appview/licenses"
)

// TestRepositoryPageTemplate demonstrates how the license badges will render
// in the actual repository.html template
func TestRepositoryPageTemplate(t *testing.T) {
	funcMap := template.FuncMap{
		"parseLicenses": func(licensesStr string) []licenses.LicenseInfo {
			return licenses.ParseLicenses(licensesStr)
		},
	}

	// This is the exact template structure from repository.html
	tmplStr := `{{ if .Licenses }}` +
		`{{ range parseLicenses .Licenses }}` +
		`{{ if .IsValid }}` +
		`<a href="{{ .URL }}" target="_blank" rel="noopener noreferrer" class="metadata-badge license-badge" title="{{ .Name }}">{{ .SPDXID }}</a>` +
		`{{ else }}` +
		`<span class="metadata-badge license-badge" title="Custom license: {{ .Name }}">{{ .Name }}</span>` +
		`{{ end }}` +
		`{{ end }}` +
		`{{ end }}`

	tmpl := template.Must(template.New("test").Funcs(funcMap).Parse(tmplStr))

	tests := []struct {
		name           string
		licenses       string
		wantContain    []string
		wantNotContain []string
	}{
		{
			name:     "MIT license",
			licenses: "MIT",
			wantContain: []string{
				`<a href="https://spdx.org/licenses/MIT.html"`,
				`class="metadata-badge license-badge"`,
				`title="MIT License"`,
				`>MIT</a>`,
			},
		},
		{
			name:     "Multiple valid licenses",
			licenses: "MIT, Apache-2.0, GPL-3.0-only",
			wantContain: []string{
				`https://spdx.org/licenses/MIT.html`,
				`https://spdx.org/licenses/Apache-2.0.html`,
				`https://spdx.org/licenses/GPL-3.0-only.html`,
				`>MIT</a>`,
				`>Apache-2.0</a>`,
				`>GPL-3.0-only</a>`,
			},
		},
		{
			name:     "Custom license",
			licenses: "CustomProprietary",
			wantContain: []string{
				`<span class="metadata-badge license-badge"`,
				`title="Custom license: CustomProprietary"`,
				`>CustomProprietary</span>`,
			},
			wantNotContain: []string{
				`<a href=`,
				`https://spdx.org`,
			},
		},
		{
			name:     "Mixed valid and custom",
			licenses: "MIT, MyCustomLicense",
			wantContain: []string{
				// Valid license (MIT) should be a link
				`<a href="https://spdx.org/licenses/MIT.html"`,
				`>MIT</a>`,
				// Custom license should be a span
				`<span class="metadata-badge license-badge"`,
				`title="Custom license: MyCustomLicense"`,
				`>MyCustomLicense</span>`,
			},
		},
		{
			name:     "Apache fuzzy match",
			licenses: "Apache 2.0",
			wantContain: []string{
				`https://spdx.org/licenses/Apache-2.0.html`,
				`>Apache-2.0</a>`,
			},
		},
		{
			name:     "Empty licenses",
			licenses: "",
			wantNotContain: []string{
				`<a `,
				`<span`,
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			data := struct{ Licenses string }{Licenses: tt.licenses}

			var buf strings.Builder
			err := tmpl.Execute(&buf, data)
			if err != nil {
				t.Fatalf("Template execution failed: %v", err)
			}

			output := buf.String()

			// Check for expected content
			for _, want := range tt.wantContain {
				if !strings.Contains(output, want) {
					t.Errorf("Output missing expected content:\nWant: %s\nGot: %s", want, output)
				}
			}

			// Check for unexpected content
			for _, notWant := range tt.wantNotContain {
				if strings.Contains(output, notWant) {
					t.Errorf("Output contains unexpected content:\nDon't want: %s\nGot: %s", notWant, output)
				}
			}

			t.Logf("Template output:\n%s", output)
		})
	}
}