import { Type } from 'class-transformer';
import {
  ArrayMaxSize,
  IsArray,
  IsBoolean,
  IsIn,
  IsInt,
  IsOptional,
  IsString,
  Max,
  MaxLength,
  Min,
  MinLength,
  ValidateIf,
} from 'class-validator';
import type { GamificationCondition, GamificationLevelDef } from '@mento/shared';
import { GAMIFICATION_EVENT_KEYS } from '@mento/shared';

const nullable = () => ValidateIf((_, v) => v !== '' && v != null);

export class SaveRuleDto {
  @IsString()
  @MinLength(2)
  @MaxLength(120)
  name!: string;

  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  description?: string | null;

  @IsIn(GAMIFICATION_EVENT_KEYS)
  event!: (typeof GAMIFICATION_EVENT_KEYS)[number];

  @Type(() => Number)
  @IsInt()
  @Min(-10000)
  @Max(100000)
  score!: number;

  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(100000)
  coins!: number;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(10)
  conditions?: GamificationCondition[];

  @IsOptional()
  @IsBoolean()
  isActive?: boolean;

  @IsOptional()
  @nullable()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  maxPerDay?: number | null;

  @IsOptional()
  @nullable()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  maxCoinsPerDay?: number | null;

  @IsOptional()
  @nullable()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  maxPerUser?: number | null;

  @IsOptional()
  @nullable()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(100000)
  cooldownMinutes?: number | null;

  @IsOptional()
  @IsBoolean()
  oncePerEntity?: boolean;

  @IsOptional()
  @IsBoolean()
  firstTimeOnly?: boolean;

  @IsOptional()
  @IsBoolean()
  requiresApproval?: boolean;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(10)
  @IsString({ each: true })
  roles?: string[];

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(50)
  @IsString({ each: true })
  teamIds?: string[];
}

export class ToggleDto {
  @IsBoolean()
  isActive!: boolean;
}

export class AdjustDto {
  @IsString()
  userId!: string;

  @Type(() => Number)
  @IsInt()
  @Min(-1000000)
  @Max(1000000)
  amount!: number;

  @IsString()
  @MinLength(2)
  @MaxLength(500)
  reason!: string;
}

export class DecisionDto {
  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  note?: string | null;
}

export class RedeemDto {
  @IsString()
  rewardId!: string;

  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  note?: string | null;
}

export class SaveRewardDto {
  @IsString()
  @MinLength(2)
  @MaxLength(120)
  name!: string;

  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  description?: string | null;

  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(10000000)
  cost!: number;

  @IsOptional()
  @IsString()
  @MaxLength(40)
  icon?: string;

  @IsOptional()
  @IsString()
  @MaxLength(20)
  color?: string;

  @IsOptional()
  @nullable()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  stock?: number | null;

  @IsOptional()
  @IsBoolean()
  isActive?: boolean;

  @IsOptional()
  @IsBoolean()
  requiresApproval?: boolean;
}

export class SaveBadgeDto {
  @IsString()
  @MinLength(2)
  @MaxLength(120)
  name!: string;

  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  description?: string | null;

  @IsOptional()
  @IsString()
  @MaxLength(40)
  icon?: string;

  @IsOptional()
  @IsString()
  @MaxLength(20)
  color?: string;

  @IsIn(['event_count', 'score_total', 'routine_streak', 'single_deal_amount'])
  metric!: 'event_count' | 'score_total' | 'routine_streak' | 'single_deal_amount';

  @IsOptional()
  @nullable()
  @IsIn(GAMIFICATION_EVENT_KEYS)
  event?: (typeof GAMIFICATION_EVENT_KEYS)[number] | null;

  @Type(() => Number)
  @IsInt()
  @Min(1)
  threshold!: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(1000000)
  coins?: number;

  @IsOptional()
  @IsBoolean()
  isActive?: boolean;
}

export class SaveBonusDto {
  @IsString()
  @MinLength(2)
  @MaxLength(120)
  name!: string;

  @IsOptional()
  @nullable()
  @IsString()
  @MaxLength(500)
  description?: string | null;

  @IsIn(['event_count_period', 'routine_streak', 'top_of_month'])
  kind!: 'event_count_period' | 'routine_streak' | 'top_of_month';

  @IsOptional()
  @nullable()
  @IsIn(GAMIFICATION_EVENT_KEYS)
  event?: (typeof GAMIFICATION_EVENT_KEYS)[number] | null;

  @Type(() => Number)
  @IsInt()
  @Min(1)
  threshold!: number;

  @IsOptional()
  @IsIn(['day', 'week', 'month'])
  period?: 'day' | 'week' | 'month';

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(1000000)
  score?: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(0)
  @Max(1000000)
  coins?: number;

  @IsOptional()
  @IsBoolean()
  isActive?: boolean;
}

export class UpdateSettingsDto {
  @IsOptional()
  @IsBoolean()
  enabled?: boolean;

  @IsOptional()
  @IsArray()
  @ArrayMaxSize(20)
  levels?: GamificationLevelDef[];

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(10000000)
  monthlyGoal?: number;

  @IsOptional()
  @IsBoolean()
  showFullLeaderboard?: boolean;
}

export class TxQueryDto {
  @IsOptional()
  @IsString()
  userId?: string;

  @IsOptional()
  @IsString()
  kind?: string;

  @IsOptional()
  @IsString()
  event?: string;

  @IsOptional()
  @IsString()
  status?: string;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  page?: number;

  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  @Max(100)
  limit?: number;
}