Implement Connect Four with win detection

Implement a Connect Four game engine. Support a general m×n board (default 6× 7) and a win condition of k in a row (default 4). Provide an API: ConnectFour(m, n, k), move(column, player)->status where status returns 0 (no win), 1 or 2 (player wins), -1 (invalid move), and a separate method isDraw(). Discs fall to the lowest available cell in the chosen column. After each move, detect wins horizontally, vertically, and both diagonals. Design data structures to achieve O( 1) or near O( 1) time per move for win checking, and analyze time/space complexity. Extend the design to support reset() and optional undo() efficiently, and discuss how you would test edge cases (full columns, out-of-range columns, early wins).