package org.jetbrains.dokka

public class KotlinWebsiteFormatService(locationService: LocationService,
                                 signatureGenerator: LanguageService)
: JekyllFormatService(locationService, signatureGenerator) {
    private var needHardLineBreaks = false

    override fun appendFrontMatter(nodes: Iterable<DocumentationNode>, to: StringBuilder) {
        super.appendFrontMatter(nodes, to)
        to.appendln("layout: api")
    }

    override public fun formatBreadcrumbs(items: Iterable<FormatLink>): String {
        items.drop(1)

        if (items.count() > 1) {
            return "<div class='api-docs-breadcrumbs'>" +
                    items.map { formatLink(it) }.joinToString(" / ") +
                    "</div>"
        }

        return ""
    }

    override public fun formatCode(code: String): String = if (code.length > 0) "<code>$code</code>" else ""

    override fun formatStrikethrough(text: String): String = "<s>$text</s>"

    override fun appendAsSignature(to: StringBuilder, node: ContentNode, block: () -> Unit) {
        val contentLength = node.textLength
        if (contentLength == 0) return
        to.append("<div class=\"signature\">")
        needHardLineBreaks = contentLength >= 62
        try {
            block()
        } finally {
            needHardLineBreaks = false
        }
        to.append("</div>")
    }

    override fun formatLink(text: String, href: String): String {
        return "<a href=\"${href}\">${text}</a>"
    }

    override fun appendTable(to: StringBuilder, body: () -> Unit) {
        to.appendln("<table class=\"api-docs-table\">")
        body()
        to.appendln("</table>")
    }

    override fun appendTableHeader(to: StringBuilder, body: () -> Unit) {
        to.appendln("<thead>")
        body()
        to.appendln("</thead>")
    }

    override fun appendTableBody(to: StringBuilder, body: () -> Unit) {
        to.appendln("<tbody>")
        body()
        to.appendln("</tbody>")
    }

    override fun appendTableRow(to: StringBuilder, body: () -> Unit) {
        to.appendln("<tr>")
        body()
        to.appendln("</tr>")
    }

    override fun appendTableCell(to: StringBuilder, body: () -> Unit) {
        to.appendln("<td markdown=\"1\">")
        body()
        to.appendln("\n</td>")
    }

    override public fun appendBlockCode(to: StringBuilder, line: String, language: String) {
        if (language.isNotEmpty()) {
            super.appendBlockCode(to, line, language)
        } else {
            to.append("<pre markdown=\"1\">")
            to.append(line.trimStart())
            to.append("</pre>")
        }
    }

    override fun formatSymbol(text: String): String {
        return "<span class=\"symbol\">${formatText(text)}</span>"
    }

    override fun formatKeyword(text: String): String {
        return "<span class=\"keyword\">${formatText(text)}</span>"
    }

    override fun formatIdentifier(text: String, kind: IdentifierKind): String {
        return "<span class=\"${identifierClassName(kind)}\">${formatText(text)}</span>"
    }

    override fun formatSoftLineBreak(): String = if (needHardLineBreaks)
        "<br/>"
    else
        ""

    override fun formatIndentedSoftLineBreak(): String = if (needHardLineBreaks)
        "<br/>&nbsp;&nbsp;&nbsp;&nbsp;"
    else
        ""

    private fun identifierClassName(kind: IdentifierKind) = when(kind) {
        IdentifierKind.ParameterName -> "parameterName"
        IdentifierKind.SummarizedTypeName -> "summarizedTypeName"
        else -> "identifier"
    }
}