/**
 * Domain Entity: Achievement
 *
 * Represents an achievement that can be earned by users.
 * Achievements are categorized by role (driver, steward, admin) and type.
 */

import type { IEntity } from '@gridpilot/shared/domain';

export type AchievementCategory = 'driver' | 'steward' | 'admin' | 'community';

export type AchievementRarity = 'common' | 'uncommon' | 'rare' | 'epic' | 'legendary';

export interface AchievementProps {
  id: string;
  name: string;
  description: string;
  category: AchievementCategory;
  rarity: AchievementRarity;
  iconUrl?: string;
  points: number;
  requirements: AchievementRequirement[];
  isSecret: boolean;
  createdAt: Date;
}

export interface AchievementRequirement {
  type: 'races_completed' | 'wins' | 'podiums' | 'clean_races' | 'protests_handled' | 
        'leagues_managed' | 'seasons_completed' | 'consecutive_clean' | 'rating_threshold' |
        'trust_threshold' | 'events_stewarded' | 'members_managed' | 'championships_won';
  value: number;
  operator: '>=' | '>' | '=' | '<' | '<=';
}

export class Achievement implements IEntity<string> {
  readonly id: string;
  readonly name: string;
  readonly description: string;
  readonly category: AchievementCategory;
  readonly rarity: AchievementRarity;
  readonly iconUrl: string;
  readonly points: number;
  readonly requirements: AchievementRequirement[];
  readonly isSecret: boolean;
  readonly createdAt: Date;

  private constructor(props: AchievementProps) {
    this.id = props.id;
    this.name = props.name;
    this.description = props.description;
    this.category = props.category;
    this.rarity = props.rarity;
    this.iconUrl = props.iconUrl ?? '';
    this.points = props.points;
    this.requirements = props.requirements;
    this.isSecret = props.isSecret;
    this.createdAt = props.createdAt;
  }

  static create(props: Omit<AchievementProps, 'createdAt'> & { createdAt?: Date }): Achievement {
    if (!props.id || props.id.trim().length === 0) {
      throw new Error('Achievement ID is required');
    }

    if (!props.name || props.name.trim().length === 0) {
      throw new Error('Achievement name is required');
    }

    if (props.requirements.length === 0) {
      throw new Error('Achievement must have at least one requirement');
    }

    return new Achievement({
      ...props,
      createdAt: props.createdAt ?? new Date(),
    });
  }

  /**
   * Check if user stats meet all requirements
   */
  checkRequirements(stats: Record<string, number>): boolean {
    return this.requirements.every(req => {
      const value = stats[req.type] ?? 0;
      switch (req.operator) {
        case '>=': return value >= req.value;
        case '>': return value > req.value;
        case '=': return value === req.value;
        case '<': return value < req.value;
        case '<=': return value <= req.value;
        default: return false;
      }
    });
  }

  /**
   * Get rarity color for display
   */
  getRarityColor(): string {
    const colors: Record<AchievementRarity, string> = {
      common: '#9CA3AF',
      uncommon: '#22C55E',
      rare: '#3B82F6',
      epic: '#A855F7',
      legendary: '#F59E0B',
    };
    return colors[this.rarity];
  }

  /**
   * Get display text for hidden achievements
   */
  getDisplayName(): string {
    if (this.isSecret) {
      return '???';
    }
    return this.name;
  }

  getDisplayDescription(): string {
    if (this.isSecret) {
      return 'This achievement is secret. Keep playing to unlock it!';
    }
    return this.description;
  }
}

// Predefined achievements for drivers
export const DRIVER_ACHIEVEMENTS: Omit<AchievementProps, 'createdAt'>[] = [
  {
    id: 'first-race',
    name: 'First Steps',
    description: 'Complete your first race',
    category: 'driver',
    rarity: 'common',
    points: 10,
    requirements: [{ type: 'races_completed', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'ten-races',
    name: 'Getting Started',
    description: 'Complete 10 races',
    category: 'driver',
    rarity: 'common',
    points: 25,
    requirements: [{ type: 'races_completed', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'fifty-races',
    name: 'Regular Racer',
    description: 'Complete 50 races',
    category: 'driver',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'races_completed', value: 50, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'hundred-races',
    name: 'Veteran',
    description: 'Complete 100 races',
    category: 'driver',
    rarity: 'rare',
    points: 100,
    requirements: [{ type: 'races_completed', value: 100, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'first-win',
    name: 'Victory Lane',
    description: 'Win your first race',
    category: 'driver',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'wins', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'ten-wins',
    name: 'Serial Winner',
    description: 'Win 10 races',
    category: 'driver',
    rarity: 'rare',
    points: 100,
    requirements: [{ type: 'wins', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'first-podium',
    name: 'Podium Finisher',
    description: 'Finish on the podium',
    category: 'driver',
    rarity: 'common',
    points: 25,
    requirements: [{ type: 'podiums', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'clean-streak-5',
    name: 'Clean Racer',
    description: 'Complete 5 consecutive races without incidents',
    category: 'driver',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'consecutive_clean', value: 5, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'clean-streak-10',
    name: 'Safety First',
    description: 'Complete 10 consecutive races without incidents',
    category: 'driver',
    rarity: 'rare',
    points: 100,
    requirements: [{ type: 'consecutive_clean', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'championship-win',
    name: 'Champion',
    description: 'Win a championship',
    category: 'driver',
    rarity: 'epic',
    points: 200,
    requirements: [{ type: 'championships_won', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'triple-crown',
    name: 'Triple Crown',
    description: 'Win 3 championships',
    category: 'driver',
    rarity: 'legendary',
    points: 500,
    requirements: [{ type: 'championships_won', value: 3, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'elite-driver',
    name: 'Elite Driver',
    description: 'Reach Elite driver rating',
    category: 'driver',
    rarity: 'epic',
    points: 250,
    requirements: [{ type: 'rating_threshold', value: 90, operator: '>=' }],
    isSecret: false,
  },
];

// Predefined achievements for stewards
export const STEWARD_ACHIEVEMENTS: Omit<AchievementProps, 'createdAt'>[] = [
  {
    id: 'first-protest',
    name: 'Justice Served',
    description: 'Handle your first protest',
    category: 'steward',
    rarity: 'common',
    points: 15,
    requirements: [{ type: 'protests_handled', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'ten-protests',
    name: 'Fair Judge',
    description: 'Handle 10 protests',
    category: 'steward',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'protests_handled', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'fifty-protests',
    name: 'Senior Steward',
    description: 'Handle 50 protests',
    category: 'steward',
    rarity: 'rare',
    points: 100,
    requirements: [{ type: 'protests_handled', value: 50, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'hundred-protests',
    name: 'Chief Steward',
    description: 'Handle 100 protests',
    category: 'steward',
    rarity: 'epic',
    points: 200,
    requirements: [{ type: 'protests_handled', value: 100, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'event-steward-10',
    name: 'Event Official',
    description: 'Steward 10 race events',
    category: 'steward',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'events_stewarded', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'trusted-steward',
    name: 'Trusted Steward',
    description: 'Achieve highly-trusted status',
    category: 'steward',
    rarity: 'rare',
    points: 150,
    requirements: [{ type: 'trust_threshold', value: 75, operator: '>=' }],
    isSecret: false,
  },
];

// Predefined achievements for admins
export const ADMIN_ACHIEVEMENTS: Omit<AchievementProps, 'createdAt'>[] = [
  {
    id: 'first-league',
    name: 'League Founder',
    description: 'Create your first league',
    category: 'admin',
    rarity: 'common',
    points: 25,
    requirements: [{ type: 'leagues_managed', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'first-season',
    name: 'Season Organizer',
    description: 'Complete your first full season',
    category: 'admin',
    rarity: 'uncommon',
    points: 50,
    requirements: [{ type: 'seasons_completed', value: 1, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'five-seasons',
    name: 'Experienced Organizer',
    description: 'Complete 5 seasons',
    category: 'admin',
    rarity: 'rare',
    points: 100,
    requirements: [{ type: 'seasons_completed', value: 5, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'ten-seasons',
    name: 'Veteran Organizer',
    description: 'Complete 10 seasons',
    category: 'admin',
    rarity: 'epic',
    points: 200,
    requirements: [{ type: 'seasons_completed', value: 10, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'large-league',
    name: 'Community Builder',
    description: 'Manage a league with 50+ members',
    category: 'admin',
    rarity: 'rare',
    points: 150,
    requirements: [{ type: 'members_managed', value: 50, operator: '>=' }],
    isSecret: false,
  },
  {
    id: 'huge-league',
    name: 'Empire Builder',
    description: 'Manage a league with 100+ members',
    category: 'admin',
    rarity: 'epic',
    points: 300,
    requirements: [{ type: 'members_managed', value: 100, operator: '>=' }],
    isSecret: false,
  },
];

// Community achievements (for all roles)
export const COMMUNITY_ACHIEVEMENTS: Omit<AchievementProps, 'createdAt'>[] = [
  {
    id: 'community-leader',
    name: 'Community Leader',
    description: 'Achieve community leader trust level',
    category: 'community',
    rarity: 'legendary',
    points: 500,
    requirements: [{ type: 'trust_threshold', value: 90, operator: '>=' }],
    isSecret: false,
  },
];