/**
 * Concentration System - Manages concentration spell mechanics
 * Handles concentration checks, breaking concentration, and duration tracking
 */
import { ConcentrationState, ConcentrationCheckResult, BreakConcentrationRequest } from '../../schema/concentration.js';
import { Character, NPC } from '../../schema/character.js';
import { ConcentrationRepository } from '../../storage/repos/concentration.repo.js';
import { CharacterRepository } from '../../storage/repos/character.repo.js';
/**
 * Calculate the DC for a concentration save after taking damage
 * DC = 10 or half the damage taken, whichever is higher
 */
export declare function calculateConcentrationDC(damageAmount: number): number;
/**
 * Roll a constitution saving throw for concentration
 */
export declare function rollConcentrationSave(constitutionModifier: number): {
    roll: number;
    total: number;
};
/**
 * Check if concentration is maintained after taking damage
 */
export declare function checkConcentration(character: Character | NPC, damageAmount: number, concentrationRepo: ConcentrationRepository): ConcentrationCheckResult;
/**
 * Break concentration for a character
 * This handles:
 * - Automatic breaks (incapacitated, death, new spell)
 * - Voluntary breaks
 * - Failed concentration saves
 */
export declare function breakConcentration(request: BreakConcentrationRequest, concentrationRepo: ConcentrationRepository, characterRepo: CharacterRepository): ConcentrationCheckResult;
/**
 * Start concentration on a spell
 */
export declare function startConcentration(characterId: string, spellName: string, spellLevel: number, currentRound: number, maxDuration: number | undefined, targetIds: string[] | undefined, concentrationRepo: ConcentrationRepository, characterRepo: CharacterRepository): void;
/**
 * Check if concentration has exceeded its duration
 */
export declare function checkConcentrationDuration(characterId: string, currentRound: number, concentrationRepo: ConcentrationRepository, characterRepo: CharacterRepository): ConcentrationCheckResult | null;
/**
 * Get active concentration for a character
 */
export declare function getConcentration(characterId: string, concentrationRepo: ConcentrationRepository): ConcentrationState | null;
/**
 * Check for automatic concentration breaks (incapacitated, death)
 * This should be called when a character's conditions change
 */
export declare function checkAutomaticConcentrationBreak(character: Character | NPC, concentrationRepo: ConcentrationRepository, characterRepo: CharacterRepository): ConcentrationCheckResult | null;
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