/**
 * In-memory team data for alpha prototype
 */

export type TeamRole = 'owner' | 'manager' | 'driver';
export type TeamMembershipStatus = 'active' | 'pending' | 'none';

export interface Team {
  id: string;
  name: string;
  tag: string;
  description: string;
  ownerId: string;
  leagues: string[];
  createdAt: Date;
}

export interface TeamMembership {
  teamId: string;
  driverId: string;
  role: TeamRole;
  status: TeamMembershipStatus;
  joinedAt: Date;
}

export interface TeamJoinRequest {
  id: string;
  teamId: string;
  driverId: string;
  requestedAt: Date;
  message?: string;
}

// In-memory storage
let teams: Team[] = [];
let teamMemberships: TeamMembership[] = [];
let teamJoinRequests: TeamJoinRequest[] = [];

// Current driver ID (matches di-container)
const CURRENT_DRIVER_ID = 'driver-1';

// Initialize with seed data
export function initializeTeamData() {
  teams = [
    {
      id: 'team-1',
      name: 'Apex Racing',
      tag: 'APEX',
      description: 'Professional GT3 racing team competing at the highest level',
      ownerId: CURRENT_DRIVER_ID,
      leagues: ['league-1'],
      createdAt: new Date('2024-01-20'),
    },
    {
      id: 'team-2',
      name: 'Speed Demons',
      tag: 'SPDM',
      description: 'Fast and furious racing with a competitive edge',
      ownerId: 'driver-2',
      leagues: ['league-1'],
      createdAt: new Date('2024-02-01'),
    },
    {
      id: 'team-3',
      name: 'Weekend Warriors',
      tag: 'WKND',
      description: 'Casual but competitive weekend racing',
      ownerId: 'driver-3',
      leagues: ['league-1'],
      createdAt: new Date('2024-02-10'),
    },
  ];

  teamMemberships = [
    {
      teamId: 'team-1',
      driverId: CURRENT_DRIVER_ID,
      role: 'owner',
      status: 'active',
      joinedAt: new Date('2024-01-20'),
    },
    {
      teamId: 'team-2',
      driverId: 'driver-2',
      role: 'owner',
      status: 'active',
      joinedAt: new Date('2024-02-01'),
    },
    {
      teamId: 'team-3',
      driverId: 'driver-3',
      role: 'owner',
      status: 'active',
      joinedAt: new Date('2024-02-10'),
    },
  ];

  teamJoinRequests = [];
}

// Get all teams
export function getAllTeams(): Team[] {
  return teams;
}

// Get team by ID
export function getTeam(teamId: string): Team | null {
  return teams.find(t => t.id === teamId) || null;
}

// Get team membership for a driver
export function getTeamMembership(teamId: string, driverId: string): TeamMembership | null {
  return teamMemberships.find(m => m.teamId === teamId && m.driverId === driverId) || null;
}

// Get driver's team
export function getDriverTeam(driverId: string): { team: Team; membership: TeamMembership } | null {
  const membership = teamMemberships.find(m => m.driverId === driverId && m.status === 'active');
  if (!membership) return null;
  
  const team = getTeam(membership.teamId);
  if (!team) return null;
  
  return { team, membership };
}

// Get all members for a team
export function getTeamMembers(teamId: string): TeamMembership[] {
  return teamMemberships.filter(m => m.teamId === teamId && m.status === 'active');
}

// Get pending join requests for a team
export function getTeamJoinRequests(teamId: string): TeamJoinRequest[] {
  return teamJoinRequests.filter(r => r.teamId === teamId);
}

// Create a new team
export function createTeam(
  name: string,
  tag: string,
  description: string,
  ownerId: string,
  leagues: string[]
): Team {
  // Check if driver already has a team
  const existingTeam = getDriverTeam(ownerId);
  if (existingTeam) {
    throw new Error('Driver already belongs to a team');
  }

  const team: Team = {
    id: `team-${Date.now()}`,
    name,
    tag,
    description,
    ownerId,
    leagues,
    createdAt: new Date(),
  };

  teams.push(team);

  // Auto-assign creator as owner
  teamMemberships.push({
    teamId: team.id,
    driverId: ownerId,
    role: 'owner',
    status: 'active',
    joinedAt: new Date(),
  });

  return team;
}

// Join a team
export function joinTeam(teamId: string, driverId: string): void {
  const existingTeam = getDriverTeam(driverId);
  if (existingTeam) {
    throw new Error('Driver already belongs to a team');
  }

  const existing = getTeamMembership(teamId, driverId);
  if (existing) {
    throw new Error('Already a member or have a pending request');
  }

  teamMemberships.push({
    teamId,
    driverId,
    role: 'driver',
    status: 'active',
    joinedAt: new Date(),
  });
}

// Request to join a team
export function requestToJoinTeam(teamId: string, driverId: string, message?: string): void {
  const existingTeam = getDriverTeam(driverId);
  if (existingTeam) {
    throw new Error('Driver already belongs to a team');
  }

  const existing = getTeamMembership(teamId, driverId);
  if (existing) {
    throw new Error('Already a member or have a pending request');
  }

  const existingRequest = teamJoinRequests.find(r => r.teamId === teamId && r.driverId === driverId);
  if (existingRequest) {
    throw new Error('Join request already pending');
  }

  teamJoinRequests.push({
    id: `team-request-${Date.now()}`,
    teamId,
    driverId,
    requestedAt: new Date(),
    message,
  });
}

// Leave a team
export function leaveTeam(teamId: string, driverId: string): void {
  const membership = getTeamMembership(teamId, driverId);
  if (!membership) {
    throw new Error('Not a member of this team');
  }

  if (membership.role === 'owner') {
    throw new Error('Team owner cannot leave. Transfer ownership or disband team first.');
  }

  teamMemberships = teamMemberships.filter(m => !(m.teamId === teamId && m.driverId === driverId));
}

// Approve join request
export function approveTeamJoinRequest(requestId: string): void {
  const request = teamJoinRequests.find(r => r.id === requestId);
  if (!request) {
    throw new Error('Join request not found');
  }

  teamMemberships.push({
    teamId: request.teamId,
    driverId: request.driverId,
    role: 'driver',
    status: 'active',
    joinedAt: new Date(),
  });

  teamJoinRequests = teamJoinRequests.filter(r => r.id !== requestId);
}

// Reject join request
export function rejectTeamJoinRequest(requestId: string): void {
  teamJoinRequests = teamJoinRequests.filter(r => r.id !== requestId);
}

// Remove member (admin action)
export function removeTeamMember(teamId: string, driverId: string, removedBy: string): void {
  const removerMembership = getTeamMembership(teamId, removedBy);
  if (!removerMembership || (removerMembership.role !== 'owner' && removerMembership.role !== 'manager')) {
    throw new Error('Only owners and managers can remove members');
  }

  const targetMembership = getTeamMembership(teamId, driverId);
  if (!targetMembership) {
    throw new Error('Member not found');
  }

  if (targetMembership.role === 'owner') {
    throw new Error('Cannot remove team owner');
  }

  teamMemberships = teamMemberships.filter(m => !(m.teamId === teamId && m.driverId === driverId));
}

// Update member role
export function updateTeamMemberRole(
  teamId: string,
  driverId: string,
  newRole: TeamRole,
  updatedBy: string
): void {
  const updaterMembership = getTeamMembership(teamId, updatedBy);
  if (!updaterMembership || updaterMembership.role !== 'owner') {
    throw new Error('Only team owner can change roles');
  }

  const targetMembership = getTeamMembership(teamId, driverId);
  if (!targetMembership) {
    throw new Error('Member not found');
  }

  if (newRole === 'owner') {
    throw new Error('Use transfer ownership to change owner');
  }

  teamMemberships = teamMemberships.map(m => 
    m.teamId === teamId && m.driverId === driverId
      ? { ...m, role: newRole }
      : m
  );
}

// Check if driver is owner or manager
export function isTeamOwnerOrManager(teamId: string, driverId: string): boolean {
  const membership = getTeamMembership(teamId, driverId);
  return membership?.role === 'owner' || membership?.role === 'manager';
}

// Get current driver ID
export function getCurrentDriverId(): string {
  return CURRENT_DRIVER_ID;
}

// Update team info
export function updateTeam(
  teamId: string,
  updates: Partial<Pick<Team, 'name' | 'tag' | 'description' | 'leagues'>>,
  updatedBy: string
): void {
  if (!isTeamOwnerOrManager(teamId, updatedBy)) {
    throw new Error('Only owners and managers can update team info');
  }

  teams = teams.map(t => 
    t.id === teamId
      ? { ...t, ...updates }
      : t
  );
}

// Initialize on module load
initializeTeamData();