/**
 * 阵营 ID 约定
 * - 玩家塔：team = ownerId（0, 1, …）
 * - 敌人：team = ENEMY_BASE + ownerId；ownerId = 该怪进攻的玩家
 * - 兼容历史 UnitFactory：team = 100 + ownerId（仍按敌方处理）
 */
export const BattleTeamId = {
    /** 敌人阵营 ID 基值（WaveSpawner / 机制覆盖后） */
    ENEMY_BASE: 1000,
    /** 旧版 UnitFactory 敌方基值 */
    LEGACY_ENEMY_BASE: 100,

    /**
     * @param playerId 目标玩家 ID
     * @returns 该玩家对应的敌人阵营 ID
     */
    enemyForPlayer(playerId: number): number {
        return BattleTeamId.ENEMY_BASE + playerId;
    },

    /**
     * @param team 阵营 ID
     * @returns 是否为敌人阵营（含 100+ 旧值与 1000+ 新值）
     */
    isEnemyTeam(team: number): boolean {
        return team >= BattleTeamId.LEGACY_ENEMY_BASE;
    },

    /**
     * 施法者是否视目标为敌对。
     * 玩家塔只打「进攻自己」的车道怪（ownerId 相同），不打己方口召唤。
     * @param casterTeam 施法者 TeamComp
     * @param targetTeam 目标 TeamComp
     */
    isHostile(
        casterTeam: { team: number; ownerId: number } | null | undefined,
        targetTeam: { team: number; ownerId: number } | null | undefined,
    ): boolean {
        if (!casterTeam || !targetTeam) return false;
        if (BattleTeamId.isEnemyTeam(casterTeam.team)) {
            return !BattleTeamId.isEnemyTeam(targetTeam.team)
                && targetTeam.ownerId === casterTeam.ownerId;
        }
        return BattleTeamId.isEnemyTeam(targetTeam.team)
            && targetTeam.ownerId === casterTeam.ownerId;
    },

    /**
     * 施法者是否视目标为友方（同属玩家侧，且非敌人阵营）。
     * @param casterTeam 施法者 TeamComp
     * @param targetTeam 目标 TeamComp
     */
    isFriendly(
        casterTeam: { team: number; ownerId: number } | null | undefined,
        targetTeam: { team: number; ownerId: number } | null | undefined,
    ): boolean {
        if (!casterTeam || !targetTeam) return false;
        if (BattleTeamId.isEnemyTeam(casterTeam.team) || BattleTeamId.isEnemyTeam(targetTeam.team)) {
            return false;
        }
        return targetTeam.ownerId === casterTeam.ownerId;
    },

    /**
     * 同侧：同一 owner，且同为敌或同为己。
     * 怪物吞本方小兵用这个；isFriendly 只表示玩家侧友军。
     * @param a 施法者阵营
     * @param b 目标阵营
     */
    isSameSide(
        a: { team: number; ownerId: number } | null | undefined,
        b: { team: number; ownerId: number } | null | undefined,
    ): boolean {
        if (!a || !b) return false;
        if (a.ownerId !== b.ownerId) return false;
        return BattleTeamId.isEnemyTeam(a.team) === BattleTeamId.isEnemyTeam(b.team);
    },
} as const;