import Foundation

func isTableLine(_ line: String) -> Bool {
    line.hasPrefix("|") && line.hasSuffix("|")
}

func parseTableRow(_ line: String) -> [String] {
    line
        .split(separator: "|", omittingEmptySubsequences: false)
        .dropFirst()
        .dropLast()
        .map { String($0).trimmingCharacters(in: .whitespaces) }
}

func parseOrgTableSeparatorRow(_ line: String) -> [String] {
    var content = line.trimmingCharacters(in: .whitespaces)
    if content.hasPrefix("|") {
        content.removeFirst()
    }
    if content.hasSuffix("|") {
        content.removeLast()
    }
    return content
        .split(separator: "+", omittingEmptySubsequences: false)
        .map { String($0).trimmingCharacters(in: .whitespaces) }
}

func isTableSeparatorCell(_ cell: String) -> Bool {
    tableAlignment(for: cell) != nil
}

func tableAlignment(for cell: String) -> String? {
    let trimmed = cell.trimmingCharacters(in: .whitespaces)
    guard !trimmed.isEmpty else { return nil }

    let core = trimmed.replacingOccurrences(of: ":", with: "")
    guard !core.isEmpty, core.allSatisfy({ $0 == "-" || $0 == "+" }) else {
        return nil
    }

    let isLeftAligned = trimmed.hasPrefix(":")
    let isRightAligned = trimmed.hasSuffix(":")
    switch (isLeftAligned, isRightAligned) {
    case (true, true):
        return "center"
    case (true, false):
        return "left"
    case (false, true):
        return "right"
    case (false, false):
        return ""
    }
}