import { VideoDescription } from "./main.ts";
import { camelToTitleCase } from "./util_string.ts";



export function singleVideoDescription(video: VideoDescription): string {
    const teachersList = video.teachers.map(v => "[[" + v + "]]").join(" & ");

    const nagElement = video.nags.length > 0 ? `<span title="${video.nags.join("&#010;")}">🔴</span>` : "";
    return `=== ${camelToTitleCase(video.title)} ===
Date: {{#time: Y-m-d (D) | ${video.date}}} ${nagElement}<br>
Teachers: ${teachersList}<br>
Level: ${video.level}

[[${video.path}|left|400px|thumb|${video.title}]]

<div style="float:left">
==== Shown Patterns ====
${video.patterns}

==== Notes ====
${video.notes}
</div>

<br clear=all>`;
}

export function writeSections(events: VideoDescription[][]): string {
    return events.map(v => {
        const token = v[0]
        const event_name = token.event === token.location ? token.event : token.event + " " + token.location

        // FIXME: This will break with videos in 75 years
        const event_contains_year = event_name.match(/\d{2}|20\d{2}/) !== null
        const event_date = event_contains_year ? "" : new Date(token.date).getFullYear().toString()

        let r = `== ${event_name} ${event_date} ==\n`
        r += `${v.length} Video${v.length <= 1 ? "" : "s"}\n`
        r += v.map(video => singleVideoDescription(video)).join("\n\n")
        return r
    }).join("\n\n\n")
}

/**
 * 
 * @param videos 
 * @returns Bucket of videos for of each event, grouped by `name`, `location` and `year`
 */
export function bucketEvents(videos: VideoDescription[]): VideoDescription[][] {
    const buckets = Object.groupBy(videos, (video) => {
        return `${video.event}${video.location}${new Date(video.date).getFullYear()}`;

    })

    const sortedBuckets = Object.values(buckets)
        .filter(v => v !== undefined)
        .map(b =>
            b.sort((a, b) =>
                new Date(a.date).getTime() - new Date(b.date).getTime()))

    return sortedBuckets
        .sort((a, b) => new Date(a[0].date).getTime() - new Date(b[0].date).getTime())
}