/**
 * Token API handlers
 */

import type { IApiContext, IApiResponse } from '../router.ts';
import { TokenService } from '../../services/token.service.ts';
import { PermissionService } from '../../services/permission.service.ts';
import type { ITokenScope, TRegistryProtocol } from '../../interfaces/auth.interfaces.ts';

export class TokenApi {
  private tokenService: TokenService;
  private permissionService: PermissionService;

  constructor(tokenService: TokenService, permissionService?: PermissionService) {
    this.tokenService = tokenService;
    this.permissionService = permissionService || new PermissionService();
  }

  /**
   * GET /api/v1/tokens
   * Query params:
   *   - organizationId: list org tokens (requires org admin)
   */
  public async list(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    try {
      const url = new URL(ctx.request.url);
      const organizationId = url.searchParams.get('organizationId');

      let tokens;
      if (organizationId) {
        // Check if user can manage org
        const canManage = await this.permissionService.canManageOrganization(ctx.actor.userId, organizationId);
        if (!canManage) {
          return { status: 403, body: { error: 'Not authorized to view organization tokens' } };
        }
        tokens = await this.tokenService.getOrgTokens(organizationId);
      } else {
        tokens = await this.tokenService.getUserTokens(ctx.actor.userId);
      }

      return {
        status: 200,
        body: {
          tokens: tokens.map((t) => ({
            id: t.id,
            name: t.name,
            tokenPrefix: t.tokenPrefix,
            protocols: t.protocols,
            scopes: t.scopes,
            organizationId: t.organizationId,
            createdById: t.createdById,
            expiresAt: t.expiresAt,
            lastUsedAt: t.lastUsedAt,
            usageCount: t.usageCount,
            createdAt: t.createdAt,
          })),
        },
      };
    } catch (error) {
      console.error('[TokenApi] List error:', error);
      return { status: 500, body: { error: 'Failed to list tokens' } };
    }
  }

  /**
   * POST /api/v1/tokens
   * Body:
   *   - name: token name
   *   - organizationId: (optional) create org token instead of personal
   *   - protocols: array of protocols
   *   - scopes: array of scope objects
   *   - expiresInDays: (optional) token expiry
   */
  public async create(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    try {
      const body = await ctx.request.json();
      const { name, organizationId, protocols, scopes, expiresInDays } = body as {
        name: string;
        organizationId?: string;
        protocols: TRegistryProtocol[];
        scopes: ITokenScope[];
        expiresInDays?: number;
      };

      if (!name) {
        return { status: 400, body: { error: 'Token name is required' } };
      }

      if (!protocols || protocols.length === 0) {
        return { status: 400, body: { error: 'At least one protocol is required' } };
      }

      if (!scopes || scopes.length === 0) {
        return { status: 400, body: { error: 'At least one scope is required' } };
      }

      // Validate protocols
      const validProtocols = ['npm', 'oci', 'maven', 'cargo', 'composer', 'pypi', 'rubygems', '*'];
      for (const protocol of protocols) {
        if (!validProtocols.includes(protocol)) {
          return { status: 400, body: { error: `Invalid protocol: ${protocol}` } };
        }
      }

      // Validate scopes
      for (const scope of scopes) {
        if (!scope.protocol || !scope.actions || scope.actions.length === 0) {
          return { status: 400, body: { error: 'Invalid scope configuration' } };
        }
      }

      // If creating org token, verify permission
      if (organizationId) {
        const canManage = await this.permissionService.canManageOrganization(ctx.actor.userId, organizationId);
        if (!canManage) {
          return { status: 403, body: { error: 'Not authorized to create organization tokens' } };
        }
      }

      const result = await this.tokenService.createToken({
        userId: ctx.actor.userId,
        organizationId,
        createdById: ctx.actor.userId,
        name,
        protocols,
        scopes,
        expiresInDays,
        createdIp: ctx.ip,
      });

      return {
        status: 201,
        body: {
          id: result.token.id,
          name: result.token.name,
          token: result.rawToken, // Only returned once!
          tokenPrefix: result.token.tokenPrefix,
          protocols: result.token.protocols,
          scopes: result.token.scopes,
          organizationId: result.token.organizationId,
          expiresAt: result.token.expiresAt,
          createdAt: result.token.createdAt,
          warning: 'Store this token securely. It will not be shown again.',
        },
      };
    } catch (error) {
      console.error('[TokenApi] Create error:', error);
      return { status: 500, body: { error: 'Failed to create token' } };
    }
  }

  /**
   * DELETE /api/v1/tokens/:id
   * Allows revoking personal tokens or org tokens (if org admin)
   */
  public async revoke(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    const { id } = ctx.params;

    try {
      // First check if it's a personal token
      const userTokens = await this.tokenService.getUserTokens(ctx.actor.userId);
      let token = userTokens.find((t) => t.id === id);

      if (!token) {
        // Check if it's an org token and user can manage org
        const { ApiToken } = await import('../../models/index.ts');
        const anyToken = await ApiToken.getInstance({ id, isRevoked: false });

        if (anyToken?.organizationId) {
          const canManage = await this.permissionService.canManageOrganization(
            ctx.actor.userId,
            anyToken.organizationId
          );
          if (canManage) {
            token = anyToken;
          }
        }
      }

      if (!token) {
        return { status: 404, body: { error: 'Token not found' } };
      }

      const success = await this.tokenService.revokeToken(id, 'user_revoked');

      if (!success) {
        return { status: 500, body: { error: 'Failed to revoke token' } };
      }

      return {
        status: 200,
        body: { message: 'Token revoked successfully' },
      };
    } catch (error) {
      console.error('[TokenApi] Revoke error:', error);
      return { status: 500, body: { error: 'Failed to revoke token' } };
    }
  }
}