// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import (
	"net/http"

	"strings"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
)

func handle_repo_index(w http.ResponseWriter, r *http.Request, params map[string]any) {
	var repo *git.Repository
	var repo_name string
	var group_path []string
	var ref_hash plumbing.Hash
	var err error
	var recent_commits []*object.Commit
	var commit_object *object.Commit
	var tree *object.Tree

	var notes []string

	repo, repo_name, group_path = params["repo"].(*git.Repository), params["repo_name"].(string), params["group_path"].([]string)

	if strings.Contains(repo_name, "\n") || slice_contains_newline(group_path) {
		notes = append(notes, "Path contains newlines; HTTP Git access impossible")
	}

	ref_hash, err = get_ref_hash_from_type_and_name(repo, params["ref_type"].(string), params["ref_name"].(string))
	if err != nil {
		goto no_ref
	}

	if recent_commits, err = get_recent_commits(repo, ref_hash, 3); err != nil {
		goto no_ref
	}
	params["commits"] = recent_commits

	if commit_object, err = repo.CommitObject(ref_hash); err != nil {
		goto no_ref
	}

	if tree, err = commit_object.Tree(); err != nil {
		goto no_ref
	}

	params["files"] = build_display_git_tree(tree)
	params["readme_filename"], params["readme"] = render_readme_at_tree(tree)

no_ref:

	params["http_clone_url"] = generate_http_remote_url(group_path, repo_name)
	params["ssh_clone_url"] = generate_ssh_remote_url(group_path, repo_name)

	params["notes"] = notes

	render_template(w, "repo_index", params)
}

/*
 * SPDX-License-Identifier: AGPL-3.0-only
 * SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
 * SPDX-FileContributor: luk3yx <https://luk3yx.github.io>
 */

/* Base styles and variables */
html {
	font-family: sans-serif;
	background-color: var(--background-color);
	color: var(--text-color);
	--background-color: hsl(0, 0%, 100%);
	--text-color: hsl(0, 0%, 0%);
	--link-color: hsl(320, 50%, 36%);
	--light-text-color: hsl(0, 0%, 45%);
	--darker-border-color: hsl(0, 0%, 72%);
	--lighter-border-color: hsl(0, 0%, 85%);
	--text-decoration-color: hsl(0, 0%, 72%);
	--darker-box-background-color: hsl(0, 0%, 92%);
	--lighter-box-background-color: hsl(0, 0%, 95%);
	--primary-color: hsl(320, 50%, 36%);
	--primary-color-contrast: hsl(320, 0%, 100%);
	--danger-color: hsl(0, 50%, 36%);
	--danger-color-contrast: hsl(0, 0%, 100%);
}

/* Dark mode overrides */
@media (prefers-color-scheme: dark) {
	html {
		--background-color: hsl(0, 0%, 0%);
		--text-color: hsl(0, 0%, 100%);
		--link-color: hsl(320, 50%, 76%);
		--light-text-color: hsl(0, 0%, 78%);
		--darker-border-color: hsl(0, 0%, 35%);
		--lighter-border-color: hsl(0, 0%, 25%);
		--text-decoration-color: hsl(0, 0%, 30%);
		--darker-box-background-color: hsl(0, 0%, 20%);
		--lighter-box-background-color: hsl(0, 0%, 15%);
	}
}

/* Global layout */
body {
	margin: 0;
}
html, code, pre {
	font-size: 0.96rem; /* TODO: Not always correct */
}

/* Toggle table controls */
.toggle-table-off, .toggle-table-on {
	opacity: 0;
	position: absolute;
}
.toggle-table-off:focus-visible + table > thead > tr > th > label,
.toggle-table-on:focus-visible + table > thead > tr > th > label {
	outline: 1.5px var(--primary-color) solid;
}
.toggle-table-off + table > thead > tr > th, .toggle-table-on + table > thead > tr > th {
	padding: 0;
}
.toggle-table-off + table > thead > tr > th > label, .toggle-table-on + table > thead > tr > th > label {
	width: 100%;
	display: inline-block;
	padding: 3px 0;
	cursor: pointer;
}
.toggle-table-off:checked + table > tbody {
	display: none;
}
.toggle-table-on + table > tbody {
	display: none;
}
.toggle-table-on:checked + table > tbody {
	display: table-row-group;
}

/* Footer styles */
footer {
	margin-top: 1rem;
	margin-left: auto;
	margin-right: auto;
	display: block;
	padding: 0 5px;
	width: fit-content;
	text-align: center;
	color: var(--light-text-color);
}
footer a:link, footer a:visited {
	color: inherit;
}

/* Padding containers */
.padding-wrapper {
	margin: 1rem auto;
	max-width: 60rem;
	padding: 0 5px;
}
.padding {
	padding: 0 5px;
}

/* Link styles */
a:link, a:visited {
	text-decoration-color: var(--text-decoration-color);
	color: var(--link-color);
}

/* Readme inline code styling */
#readme code:not(pre > code) {
	background-color: var(--lighter-box-background-color);
	border-radius: 2px;
	padding: 2px;
}

/* Readme word breaks to avoid overfull hboxes */
#readme {
	word-break: break-word;
}

/* Table styles */
table {
	border: var(--lighter-border-color) solid 1px;
	border-spacing: 0px;
	border-collapse: collapse;
}
table.wide {
	width: 100%;
}
td, th {
	padding: 3px 5px;
	border: var(--lighter-border-color) solid 1px;
}
.pad {
	padding: 3px 5px;
}
th, thead, tfoot {
	background-color: var(--lighter-box-background-color);
}
th[scope=row] {
	text-align: left;
}
tr.title-row > th, th.title-row, .title-row {
	background-color: var(--lighter-box-background-color);
}
td > pre {
	margin: 0;
}
#readme > *:last-child {
	margin-bottom: 0;
}
#readme > *:first-child {
	margin-top: 0;
}

/* Table misc and scrolling */
.commit-id {
	font-family: monospace;
	word-break: break-word;
}
.scroll {
	overflow-x: auto;
}

/* Diff/chunk styles */
.chunk-unchanged {
	color: grey;
}
.chunk-addition {
	background-color: green;
}
@media (prefers-color-scheme: dark) {
	.chunk-addition {
		background-color: lime;
	}
}
.chunk-deletion {
	background-color: red;
}
.chunk-unknown {
	background-color: yellow;
}
pre.chunk {
	margin-top: 0;
	margin-bottom: 0;
}
.centering {
	text-align: center;
}

/* Toggle content sections */
.toggle-off-wrapper, .toggle-on-wrapper {
	border: var(--lighter-border-color) solid 1px;
}
.toggle-off-toggle, .toggle-on-toggle {
	opacity: 0;
	position: absolute;
}
.toggle-off-header, .toggle-on-header {
	font-weight: bold;
	cursor: pointer;
	display: block;
	width: 100%;
	background-color: var(--lighter-box-background-color);
}
.toggle-off-header > div, .toggle-on-header > div {
	padding: 3px 5px;
	display: block;
}
.toggle-on-content {
	display: none;
}
.toggle-on-toggle:focus-visible + .toggle-on-header, .toggle-off-toggle:focus-visible + .toggle-off-header {
	outline: 1.5px var(--primary-color) solid;
}
.toggle-on-toggle:checked + .toggle-on-header + .toggle-on-content {
	display: block;
}
.toggle-off-content {
	display: block;
}
.toggle-off-toggle:checked + .toggle-off-header + .toggle-off-content {
	display: none;
}

*:focus-visible {
	outline: 1.5px var(--primary-color) solid;
}

/* File display styles */
.file-patch + .file-patch {
	margin-top: 0.5rem;
}
.file-content {
	padding: 3px 5px;
}
.file-header {
	font-family: monospace;
	display: flex;
	flex-direction: row;
	align-items: center;
}
.file-header::after {
	content: "\25b6";
	font-family: sans-serif;
	margin-left: auto;
	line-height: 100%;
	margin-right: 0.25em;
}
.file-toggle:checked + .file-header::after {
	content: "\25bc";
}

/* Form elements */
textarea {
	box-sizing: border-box;
	background-color: var(--lighter-box-background-color);
	resize: vertical;
}
textarea,
input[type=text],
input[type=password] {
	font-family: sans-serif;
	font-size: smaller;
	background-color: var(--lighter-box-background-color);
	color: var(--text-color);
	border: none;
	padding: 0.3rem;
	width: 100%;
	box-sizing: border-box;
}
td.tdinput, th.tdinput {
	padding: 0;
	position: relative;
}
td.tdinput textarea,
td.tdinput input[type=text],
td.tdinput input[type=password],
th.tdinput textarea,
th.tdinput input[type=text],
th.tdinput input[type=password] {
	background-color: transparent;
}
td.tdinput select {
	position: absolute;
	background-color: var(--background-color);
	border: none;
	/*
	width: 100%;
	height: 100%;
	*/
	box-sizing: border-box;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
}
select:active {
	outline: 1.5px var(--primary-color) solid;
}


/* Button styles */
.btn-primary, a.btn-primary {
	background: var(--primary-color);
	color: var(--primary-color-contrast);
	border: var(--lighter-border-color) 1px solid;
	font-weight: bold;
}
.btn-danger, a.btn-danger {
	background: var(--danger-color);
	color: var(--danger-color-contrast);
	border: var(--lighter-border-color) 1px solid;
	font-weight: bold;
}
.btn-white, a.btn-white {
	background: var(--primary-color-contrast);
	color: var(--primary-color);
	border: var(--lighter-border-color) 1px solid;
}
.btn-normal, a.btn-normal,
input[type=file]::file-selector-button {
	background: var(--lighter-box-background-color);
	border: var(--lighter-border-color) 1px solid !important;
	color: var(--text-color);
}
.btn, .btn-white, .btn-danger, .btn-normal, .btn-primary,
input[type=submit],
input[type=file]::file-selector-button {
	display: inline-block;
	width: auto;
	min-width: fit-content;
	border-radius: 0;
	padding: .1rem .75rem;
	font-size: 0.9rem;
	transition: background .1s linear;
	cursor: pointer;
}
a.btn, a.btn-white, a.btn-danger, a.btn-normal, a.btn-primary {
	text-decoration: none;
}

/* Header layout */
header#main-header {
	background-color: var(--lighter-box-background-color);
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 10px;
}
header#main-header > div#main-header-forge-title {
	flex-grow: 1;
}
header#main-header > div#main-header-user {
	display: flex;
	align-items: center;
}

/* Uncategorized */

table + table {
	margin-top: 1rem;
}

td > ul {
	padding-left: 1.5rem;
	margin-top: 0;
	margin-bottom: 0;
}

{{/*
	SPDX-License-Identifier: AGPL-3.0-only
	SPDX-FileContributor: Runxi Yu <https://runxiyu.org>
*/}}
{{- define "repo_index" -}}
<!DOCTYPE html>
<html lang="en">
	<head>
		{{ template "head_common" . }}
		<title>{{ .repo_name }} &ndash; {{ template "group_path_plain" .group_path }} &ndash; {{ .global.forge_title }}</title>
	</head>
	<body class="repo-index">
		{{ template "header" . }}
		<div class="padding-wrapper">
			<table id="repo-info-table">
				<thead>
					<tr class="title-row">
						<th colspan="2">Repo info</th>
					</tr>
				</thead>
				<tbody>
					<tr>
						<th scope="row">Name</th>
						<td>{{ .repo_name }}</td>
					</tr>
					{{ if .repo_description }}
						<tr>
							<th scope="row">Description</th>
							<td>{{ .repo_description }}</td>
						</tr>
					{{ end }}
					<tr>
						<th scope="row">SSH remote</th>
						<td><code>{{ .ssh_clone_url }}</code></td>
					</tr>

					{{ if .notes }}
						<tr>
							<th scope="row">Notes</th>
							<td><ul>{{ range .notes }}<li>{{ . }}</li>{{ end }}</ul></td>
						</tr>
					{{ end }}

				</tbody>
			</table>
		</div>
		<div class="padding-wrapper">
			<p>
				<a href="contrib/" class="btn-normal">Merge requests</a>
			</p>
		</div>
		{{ if .commits }}
			<div class="padding-wrapper scroll">
				<table id="recent-commits" class="wide">
					<thead>
						<tr class="title-row">
							<th colspan="3">Recent commits (<a href="log/{{ if .ref_type }}?{{ .ref_type }}={{ .ref_name }}{{ end }}">see all</a>)</th>
						</tr>
						<tr>
							<th scope="col">Title</th>
							<th scope="col">Author</th>
							<th scope="col">Author Date</th>
						</tr>
					</thead>
					<tbody>
						{{- range .commits }}
							<tr>
								<td class="commit-title"><a href="commit/{{ .ID }}">{{ .Message | first_line }}</a></td>
								<td class="commit-author">
									<a class="email-name" href="mailto:{{ .Author.Email }}">{{ .Author.Name }}</a>
								</td>
								<td class="commit-time">
									{{ .Author.When.Format "2006-01-02 15:04:05 -0700" }}
								</td>
							</tr>
						{{- end }}
					</tbody>
				</table>
			</div>
		{{ end }}
		{{ if .files }}
			<div class="padding-wrapper scroll">
				<table id="file-tree" class="wide">
					<thead>
						<tr class="title-row">
							<th colspan="3">/{{ if .ref_name }} on {{ .ref_name }}{{ end }}</th>
						</tr>
						<tr>
							<th scope="col">Mode</th>
							<th scope="col">Filename</th>
							<th scope="col">Size</th>
						</tr>
					</thead>
					<tbody>
						{{- $ref_type := .ref_type }}
						{{- $ref := .ref_name }}
						{{- range .files }}
							<tr>
								<td class="file-mode">{{ .Mode }}</td>
								<td class="file-name"><a href="tree/{{ .Name }}{{ if not .Is_file }}/{{ end }}{{ if $ref_type }}?{{ $ref_type }}={{ $ref }}{{ end }}">{{ .Name }}</a>{{ if not .Is_file }}/{{ end }}</td>
								<td class="file-size">{{ .Size }}</td>
							</tr>
						{{- end }}
					</tbody>
				</table>
			</div>
		{{ end }}
		{{ if .readme }}
			<div class="padding-wrapper" id="readme">
				{{ .readme }}
			</div>
		{{ end }}
		<footer>
			{{ template "footer" . }}
		</footer>
	</body>
</html>
{{- end -}}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileContributor: Runxi Yu <https://runxiyu.org>

package main

import "strings"

func slice_contains_newline(s []string) bool {
	for _, v := range s {
		if strings.Contains(v, "\n") {
			return true
		}
	}
	return false
}