/**
 * Repository API handlers
 */

import type { IApiContext, IApiResponse } from '../router.ts';
import { PermissionService } from '../../services/permission.service.ts';
import { AuditService } from '../../services/audit.service.ts';
import { Repository, Organization } from '../../models/index.ts';
import type { TRegistryProtocol } from '../../interfaces/auth.interfaces.ts';

export class RepositoryApi {
  private permissionService: PermissionService;

  constructor(permissionService: PermissionService) {
    this.permissionService = permissionService;
  }

  /**
   * GET /api/v1/organizations/:orgId/repositories
   */
  public async list(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    const { orgId } = ctx.params;

    try {
      // Get accessible repositories
      const repositories = await this.permissionService.getAccessibleRepositories(
        ctx.actor.userId,
        orgId
      );

      return {
        status: 200,
        body: {
          repositories: repositories.map((repo) => ({
            id: repo.id,
            name: repo.name,
            displayName: repo.displayName,
            description: repo.description,
            protocols: repo.protocols,
            isPublic: repo.isPublic,
            packageCount: repo.packageCount,
            createdAt: repo.createdAt,
          })),
        },
      };
    } catch (error) {
      console.error('[RepositoryApi] List error:', error);
      return { status: 500, body: { error: 'Failed to list repositories' } };
    }
  }

  /**
   * GET /api/v1/repositories/:id
   */
  public async get(ctx: IApiContext): Promise<IApiResponse> {
    const { id } = ctx.params;

    try {
      const repo = await Repository.findById(id);
      if (!repo) {
        return { status: 404, body: { error: 'Repository not found' } };
      }

      // Check access
      if (!repo.isPublic && ctx.actor?.userId) {
        const permissions = await this.permissionService.resolvePermissions({
          userId: ctx.actor.userId,
          organizationId: repo.organizationId,
          repositoryId: repo.id,
        });

        if (!permissions.canRead) {
          return { status: 403, body: { error: 'Access denied' } };
        }
      }

      return {
        status: 200,
        body: {
          id: repo.id,
          organizationId: repo.organizationId,
          name: repo.name,
          displayName: repo.displayName,
          description: repo.description,
          protocols: repo.protocols,
          isPublic: repo.isPublic,
          settings: repo.settings,
          packageCount: repo.packageCount,
          storageBytes: repo.storageBytes,
          createdAt: repo.createdAt,
        },
      };
    } catch (error) {
      console.error('[RepositoryApi] Get error:', error);
      return { status: 500, body: { error: 'Failed to get repository' } };
    }
  }

  /**
   * POST /api/v1/organizations/:orgId/repositories
   */
  public async create(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    const { orgId } = ctx.params;

    // Check admin permission
    const canManage = await this.permissionService.canManageOrganization(ctx.actor.userId, orgId);
    if (!canManage) {
      return { status: 403, body: { error: 'Admin access required' } };
    }

    try {
      const body = await ctx.request.json();
      const { name, displayName, description, protocols, isPublic, settings } = body;

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

      // Validate name format
      if (!/^[a-z0-9]([a-z0-9-]*[a-z0-9])?$/.test(name)) {
        return {
          status: 400,
          body: { error: 'Name must be lowercase alphanumeric with optional hyphens' },
        };
      }

      // Check org exists
      const org = await Organization.findById(orgId);
      if (!org) {
        return { status: 404, body: { error: 'Organization not found' } };
      }

      // Check if name is taken in this org
      const existing = await Repository.findByName(orgId, name);
      if (existing) {
        return { status: 409, body: { error: 'Repository name already taken in this organization' } };
      }

      // Create repository
      const repo = new Repository();
      repo.id = await Repository.getNewId();
      repo.organizationId = orgId;
      repo.name = name;
      repo.displayName = displayName || name;
      repo.description = description;
      repo.protocols = protocols || ['npm'];
      repo.isPublic = isPublic ?? false;
      repo.settings = settings || {
        allowOverwrite: false,
        immutableTags: false,
        retentionDays: 0,
      };
      repo.createdAt = new Date();
      repo.createdById = ctx.actor.userId;

      await repo.save();

      // Audit log
      await AuditService.withContext({
        actorId: ctx.actor.userId,
        actorType: 'user',
        actorIp: ctx.ip,
        organizationId: orgId,
      }).logRepositoryCreated(repo.id, repo.name, orgId);

      return {
        status: 201,
        body: {
          id: repo.id,
          organizationId: repo.organizationId,
          name: repo.name,
          displayName: repo.displayName,
          description: repo.description,
          protocols: repo.protocols,
          isPublic: repo.isPublic,
          createdAt: repo.createdAt,
        },
      };
    } catch (error) {
      console.error('[RepositoryApi] Create error:', error);
      return { status: 500, body: { error: 'Failed to create repository' } };
    }
  }

  /**
   * PUT /api/v1/repositories/:id
   */
  public async update(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    const { id } = ctx.params;

    try {
      const repo = await Repository.findById(id);
      if (!repo) {
        return { status: 404, body: { error: 'Repository not found' } };
      }

      // Check admin permission
      const canManage = await this.permissionService.canManageRepository(
        ctx.actor.userId,
        repo.organizationId,
        id
      );
      if (!canManage) {
        return { status: 403, body: { error: 'Admin access required' } };
      }

      const body = await ctx.request.json();
      const { displayName, description, protocols, isPublic, settings } = body;

      if (displayName !== undefined) repo.displayName = displayName;
      if (description !== undefined) repo.description = description;
      if (protocols !== undefined) repo.protocols = protocols;
      if (isPublic !== undefined) repo.isPublic = isPublic;
      if (settings !== undefined) repo.settings = { ...repo.settings, ...settings };

      await repo.save();

      return {
        status: 200,
        body: {
          id: repo.id,
          name: repo.name,
          displayName: repo.displayName,
          description: repo.description,
          protocols: repo.protocols,
          isPublic: repo.isPublic,
          settings: repo.settings,
        },
      };
    } catch (error) {
      console.error('[RepositoryApi] Update error:', error);
      return { status: 500, body: { error: 'Failed to update repository' } };
    }
  }

  /**
   * DELETE /api/v1/repositories/:id
   */
  public async delete(ctx: IApiContext): Promise<IApiResponse> {
    if (!ctx.actor?.userId) {
      return { status: 401, body: { error: 'Authentication required' } };
    }

    const { id } = ctx.params;

    try {
      const repo = await Repository.findById(id);
      if (!repo) {
        return { status: 404, body: { error: 'Repository not found' } };
      }

      // Check admin permission
      const canManage = await this.permissionService.canManageRepository(
        ctx.actor.userId,
        repo.organizationId,
        id
      );
      if (!canManage) {
        return { status: 403, body: { error: 'Admin access required' } };
      }

      // Check for packages
      if (repo.packageCount > 0) {
        return {
          status: 400,
          body: { error: 'Cannot delete repository with packages. Remove all packages first.' },
        };
      }

      await repo.delete();

      return {
        status: 200,
        body: { message: 'Repository deleted successfully' },
      };
    } catch (error) {
      console.error('[RepositoryApi] Delete error:', error);
      return { status: 500, body: { error: 'Failed to delete repository' } };
    }
  }
}