// Copyright 2022 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package docgen

import (
	"fmt"
	"io"
	"sort"
)

func WriteToc(settings WriteSettings, index *Index, f io.Writer) {
	fmt.Fprintf(f, "# Generated by cppdocgen. Do not edit.\n")

	fmt.Fprintf(f, "toc:\n")
	fmt.Fprintf(f, "- title: \"Overview\"\n")
	fmt.Fprintf(f, "  path: %s%s\n", settings.TocPath, "index.md")
	fmt.Fprintf(f, "- heading: \"%s headers\"\n", settings.LibName)

	// Sort the headers by name for the output (the map ordering is not stable).
	Headers := make([]*Header, 0, len(index.Headers))
	for _, h := range index.Headers {
		Headers = append(Headers, h)
	}
	sort.Sort(headerByName(Headers))

	for _, h := range Headers {
		title := h.CustomTitle()
		if title == "" {
			fmt.Fprintf(f, "- title: \"%s\"\n", settings.GetUserIncludePath(h.Name))
		} else {
			fmt.Fprintf(f, "- title: \"%s\"\n", title)
		}

		fmt.Fprintf(f, "  path: %s%s\n", settings.TocPath, h.ReferenceFileName())
	}
}