import * as LSPClient from "./client"

const MAX_PER_FILE = 20

export function pretty(diagnostic: LSPClient.Diagnostic) {

const severityMap = {

1: "ERROR",

2: "WARN",

3: "INFO",

4: "HINT",

}

const severity = severityMap[diagnostic.severity || 1]

const line = diagnostic.range.start.line + 1

const col = diagnostic.range.start.character + 1

return `${severity} [${line}:${col}] ${diagnostic.message}`

}

export function report(file: string, issues: LSPClient.Diagnostic[]) {

const errors = issues.filter((item) => item.severity === 1)

if (errors.length === 0) return ""

const limited = errors.slice(0, MAX_PER_FILE)

const more = errors.length - MAX_PER_FILE

const suffix = more > 0 ? `\n... and ${more} more` : ""

return `<diagnostics file="${file}">\n${limited.map(pretty).join("\n")}${suffix}\n</diagnostics>`

}

export * as Diagnostic from "./diagnostic"