import type { HallOfFameMon, HallOfFameTeam } from "../party/hall-of-fame";
import { PokemonData } from "../rom/pokemon";
import { JOHTO } from "../rom/profile";
import { fontTiles, FRAME_TILE, SPACE_TILE, textTiles } from "../rom/font";
import type { ScriptEffect } from "./interpreter";
import { blankScreen, SCREEN_BUTTONS, type TileScreen } from "./screen";
import { defaultTextContext, readString } from "./text";
import type { GameSound } from "../audio/sound";

/** Place text on a screen as tile numbers; '"' is <PK> in a nickname. */
export function placeText(screen: TileScreen, x: number, y: number, value: string) {
  const tiles = (value.match(/ᴾᴷ|ᴹᴺ|[\s\S]/gu) ?? []).flatMap((character) =>
    character === '"' ? [0xe1] : textTiles(character),
  );
  screen.map.splice(y * 20 + x, tiles.length, ...tiles);
}
/** Textbox: a frame with `width` interior columns and `height` interior
 * rows whose top-left corner is at (x, y). */
export function placeTextbox(
  screen: TileScreen,
  x: number,
  y: number,
  height: number,
  width = 18,
) {
  const put = (column: number, row: number, values: readonly number[]) =>
    screen.map.splice(row * 20 + column, values.length, ...values);
  put(x, y, [FRAME_TILE, ...Array(width).fill(FRAME_TILE + 1), FRAME_TILE + 2]);
  for (let row = y + 1; row <= y + height; row++) {
    put(x, row, [FRAME_TILE + 3, ...Array(width).fill(SPACE_TILE), FRAME_TILE + 3]);
  }
  put(x, y + height + 1, [
    FRAME_TILE + 4,
    ...Array(width).fill(FRAME_TILE + 1),
    FRAME_TILE + 5,
  ]);
}
/** The Hall of Fame screens' tiles: the standard font, the textbox frame
 * and _LoadFontsBattleExtra's $60-$78 (InitDisplayForHallOfFame and
 * _HallOfFamePC load the same). */
export function hallOfFameTiles(data: PokemonData, frame: number) {
  const tiles = fontTiles(data.reader, frame);
  tiles.set(data.reader.slice(JOHTO.FontBattleExtra, 25 * 16), 0x60 * 16);
  return tiles;
}

/** DisplayHOFMon: one Pokémon's page, over the Hall of Fame tiles, in
 * SCGB_PLAYER_OR_MON_FRONTPIC_PALS's single palette, without the title
 * line its callers print at (1, 2). The picture is shown at rest:
 * HOF_AnimateFrontpic's ANIM_MON_HOF animation is not ported. */
export function displayHOFMon(
  data: PokemonData,
  mon: HallOfFameMon,
  frame: number,
  label: string,
): TileScreen {
  const tiles = hallOfFameTiles(data, frame);
  tiles.set(data.frontPic(mon.species, PokemonData.unownLetter(mon.dvs)));
  const screen = blankScreen(
    tiles,
    `hof-${mon.species}-${mon.dvs}-${frame}`,
    [data.palette(mon.species, PokemonData.shiny(mon.dvs))],
    `${label}: ${mon.nickname}, ${data.speciesName(mon.species)}, level ${mon.level}, ID ${String(mon.otId).padStart(5, "0")}`,
  );
  screen.map.fill(SPACE_TILE);
  const put = (x: number, y: number, values: readonly number[]) =>
    screen.map.splice(y * 20 + x, values.length, ...values);
  const text = (x: number, y: number, value: string) => placeText(screen, x, y, value);
  placeTextbox(screen, 0, 0, 3);
  placeTextbox(screen, 0, 12, 4);
  for (let x = 0; x < 7; x++)
    for (let y = 0; y < 7; y++) put(x + 6, y + 5, [x * 7 + y]);
  put(1, 13, [0x74, 0xf2]); // № and <DOT>.
  text(3, 13, String(mon.species).padStart(3, "0"));
  // GetBasePokemonName drops the Nidorans' gender sign.
  text(7, 13, data.speciesName(mon.species).split(/[♂♀]/)[0]);
  const gender = data.gender(mon.species, mon.dvs);
  text(18, 13, gender === "male" ? "♂" : gender === "female" ? "♀" : " ");
  text(8, 14, `/${mon.nickname}`);
  // PrintLevel: <LV> and two digits, or three digits over the <LV>.
  if (mon.level < 100) {
    put(1, 16, [0x6e]);
    text(2, 16, String(mon.level));
  } else text(1, 16, String(mon.level));
  put(7, 16, [0x73, 0x74, 0xf3]); // <ID>, № and /.
  text(10, 16, String(mon.otId).padStart(5, "0"));
  return screen;
}

/** _HallOfFamePC.DisplayMonAndStrings: DisplayHOFMon's page for one
 * Pokémon of a team with the team's "-Time Famer" title. */
export function hallOfFameScreen(
  data: PokemonData,
  team: HallOfFameTeam,
  slot: number,
  frame: number,
): TileScreen {
  const title = readString(
    data.reader,
    JOHTO["_HallOfFamePC.TimeFamer"],
    defaultTextContext(""),
  );
  const screen = displayHOFMon(data, team.mons[slot], frame, `${team.win}${title.trimStart()}`);
  // "HOF Master!" needs a count of HOF_MASTER_COUNT + 1, which the capped
  // count never reaches: the original's bug (docs/bugs_and_glitches.md)
  // leaves every team "-Time Famer".
  placeText(screen, 1, 2, title);
  placeText(screen, 2, 2, String(team.win).padStart(3, " "));
  return screen;
}

/** _HallOfFamePC: LoadHOFTeam takes the teams newest first until an absent
 * one (or NUM_HOF_TEAMS); A shows the team's next Pokémon, and after the
 * last one the next team, Start skips to the next team and B leaves. Each
 * page cries as ANIM_MON_HOF's CryNoWait does. */
export function* hallOfFamePC(
  data: PokemonData,
  teams: readonly HallOfFameTeam[],
  frame: number,
  sound?: GameSound,
): Generator<ScriptEffect, void, number | string | undefined> {
  for (const team of teams) {
    for (let slot = 0; slot < team.mons.length; slot++) {
      sound?.playMonCry2(team.mons[slot].species);
      const screen = hallOfFameScreen(data, team, slot, frame);
      for (;;) {
        const button = yield { kind: "screen", screen };
        if (typeof button !== "string" || !SCREEN_BUTTONS.includes(button))
          throw new Error("Invalid Hall of Fame button.");
        if (button === "b") return;
        if (button === "start") {
          slot = team.mons.length;
          break;
        }
        if (button === "a") break;
      }
    }
  }
}