const fs = require('fs')

function importTranscript(srtContent, names) {
    const entries = srtContent.trim().split(/\n\n+/)
    const nameSet = new Set(names.map(name => name.trim()))

    let foundSpeakers = new Set()

    const mdEntries = entries.map(entry => {
        const lines = entry.split(/\n/)
        if (lines.length < 3) return null

        const timeParts = lines[1].split(' --> ')
        if (timeParts.length !== 2) return null

        let content = lines.slice(2).join(' ').trim()
        for (const name of nameSet) {
            const regex = new RegExp(`^${name}:`, 'i')
            if (content.match(regex)) {
                content = content.replace(name, `**${name}**`)
                foundSpeakers.add(name)
                break
            }
        }

        return `==${timeParts[0]}==${content}==${timeParts[1]}==`
    }).filter(Boolean)

    nameSet.forEach(name => {
        if (!foundSpeakers.has(name)) {
            console.warn(`Warning: Speaker ${name} wasn't found. Did you misspell their name?`)
        }
    })

    return mdEntries.join('\n\n')
}

let srtFileName, mdFileName, names = ''

for (let i = 2; i < process.argv.length; i++) {
    switch (process.argv[i]) {
        case '--input':
        case '-i':
            srtFileName = process.argv[++i]
            break
        case '--output':
        case '-o':
            mdFileName = process.argv[++i]
            break
        case '--speakers':
            names = process.argv[++i]
            break
    }
}

if (!srtFileName) {
    console.log("This utility converts valid .srt files to NDC compatible transcripts. Usage: node import-transcripts.js --input <input.srt> --output <output.md> --speakers 'Name1,Name2,...'")
    process.exit(1)
}

const srtContent = fs.readFileSync(srtFileName, 'utf8')
const nameList = names.split(',')
const mdContent = importTranscript(srtContent, nameList)

if (mdFileName) {
    fs.writeFileSync(mdFileName, mdContent, 'utf8')
    console.log(`Converted content written to ${mdFileName}`)
} else {
    console.log(mdContent)
}