import {
  ApplicationCommandType,
  AutocompleteContext, type CommandContext,
  CommandOptionType, Message,
  SlashCommand,
  type SlashCreator
} from "slash-create";
import {type GameCharacter, listCharacters, loadCharacter, saveCharacter} from "../character.js";
import {renderStatus} from "../renderStatus.js";
import {readFile} from "fs/promises";
import {join} from "path";
import {
  AbstractCharacterStatusCommand,
  CharacterOptionTemplate,
  type GameCharacterData,
  type LoadedCharacterData
} from "./base.js";

export class ExperienceCharacterCommand extends AbstractCharacterStatusCommand {
  constructor(creator: SlashCreator) {
    super(creator, {
      name: "experience",
      description: "Modifies the EXP total of the given character(s).",
      type: ApplicationCommandType.CHAT_INPUT,
      guildIDs: process.env.DEVELOPMENT_GUILD_ID,
      options: [
        {
          ...CharacterOptionTemplate,
          name: "character",
          description: "The name of the character(s) to grant EXP to or remove EXP from.",
          required: true,
        },
        {
          type: CommandOptionType.INTEGER,
          name: "delta",
          description: "The amount of EXP to apply to the character(s) (default +1).",
          max_value: 25,
          min_value: -25,
          required: false,
        },
      ]
    });
  }

  async process(ctx: CommandContext, characters: Map<string, readonly GameCharacterData[]>): Promise<readonly [string, LoadedCharacterData[]] | readonly [string, LoadedCharacterData] | readonly LoadedCharacterData[] | LoadedCharacterData | string> {
    const delta = ctx.options["delta"] ?? 1
    const description: string[] = []
    const result: LoadedCharacterData[] = []
    for (const character of characters.get("character")!) {
      if (!character.success) {
        description.push(`**${character.name}** ${delta >= 0 ? "gained" : "lost"} ${Math.abs(delta)} EXP${delta >= 0 ? "!" : "."}`)
        continue
      }
      character.newData = {
        ...character.newData ?? character.originalData
      }
      const oldLevels = Math.floor(character.newData.experience / 5)
      character.newData.experience = Math.max(0, (character.newData.experience ?? 0) + delta)
      const levels = Math.floor(character.newData.experience / 5)
      result.push(character)
      description.push(`**${character.name}** ${delta >= 0 ? "gained" : "lost"} ${Math.abs(delta)} EXP${delta >= 0 ? "!" : "."}${levels > oldLevels ? " ***Level up!***" : ""}`)
    }
    return [description.join("\n"), result]
  }
}