import { i18n } from '../i18n'
import { sdk } from '../sdk'
import { deleteGame, exportGame, listGames } from '../serverApi'

const { InputSpec, Value } = sdk

/**
 * Pick a game, then keep it or end it.
 *
 * The dropdown is built when the form opens rather than being a fixed list — `inputSpec` takes a
 * function, so the options are whatever is on the server at that moment, labelled well enough to
 * tell two games apart without opening Games in Progress first.
 *
 * Ending is the only way a game finishes other than being played out. Until this existed an
 * abandoned game stayed active in the index and was faithfully resumed on every boot, forever,
 * with no route, player action or resignation able to stop it.
 */
export const manageGame = sdk.Action.withInput(
  'manage-game',

  async () => ({
    name: i18n('Manage Game'),
    description: i18n(
      'Save a game for later, or end one that will never finish',
    ),
    warning: i18n(
      'Ending a game cannot be undone. Its save is returned, so it can still be replayed.',
    ),
    allowedStatuses: 'only-running',
    group: null,
    visibility: 'enabled',
  }),

  async ({ effects }) => {
    const games = await listGames(effects)
    const values: Record<string, string> = {}
    for (const g of games) {
      const name = g.gameCode ?? g.gameId
      values[g.gameId] =
        g.state === 'lobby'
          ? `${name} — ${i18n('waiting to start')}, ${g.playerCount} ${i18n('seats')}`
          : `${name} — ${g.playerCount} ${i18n('players')}, ${i18n('Day')} ${g.day} ${i18n('Stage')} ${g.stage}` +
            (g.waitingOn ? `, ${i18n('waiting on')} ${g.waitingOn.name}` : '')
    }
    // A select needs a default drawn from its own options, and an empty server has none to offer —
    // so it says so in the dropdown rather than rendering an empty one.
    if (Object.keys(values).length === 0)
      values['none'] = i18n('No games on this server')

    return InputSpec.of({
      gameId: Value.select({
        name: i18n('Game'),
        description: i18n('Which game to act on'),
        default: Object.keys(values)[0]!,
        values,
      }),
      operation: Value.select({
        name: i18n('What to do'),
        description: i18n(
          'Export changes nothing. Ending deletes the game from the server.',
        ),
        default: 'export',
        values: {
          export: i18n('Export — save a copy, leave the game running'),
          end: i18n('End the game — delete it from the server'),
        },
      }),
    })
  },

  // Nothing to pre-fill: which game you mean is the question being asked, and Export is already
  // the default because it is the choice that cannot lose anything.
  async () => null,

  async ({ effects, input }) => {
    if (input.gameId === 'none') {
      return {
        version: '1',
        title: i18n('Manage Game'),
        message: i18n('There are no games on this server.'),
        result: null,
      }
    }

    if (input.operation === 'export') {
      const save = await exportGame(effects, input.gameId)
      return {
        version: '1',
        title: i18n('Game Saved'),
        message: i18n(
          'This is the whole game — its seed and every move made in it. Save it as a .json file and open it in the replay viewer to watch the game back. The game itself is untouched and still running.',
        ),
        result: {
          type: 'single',
          name: i18n('Save'),
          description: null,
          value: JSON.stringify(save),
          masked: false,
          copyable: true,
          qr: false,
        },
      }
    }

    const { gameCode, save } = await deleteGame(effects, input.gameId)
    return {
      version: '1',
      title: i18n('Game Ended'),
      message:
        `${gameCode ?? i18n('The game')} — ` +
        i18n(
          'deleted from the server, and anyone still connected to it has been disconnected. Its save is below: keep it if you want to watch the game back, because this is the only copy left.',
        ),
      result: {
        type: 'single',
        name: i18n('Save'),
        description: null,
        value: JSON.stringify(save),
        masked: false,
        copyable: true,
        qr: false,
      },
    }
  },
)