/**
 * Intake API Client
 *
 * API client methods for the study intake workflow.
 */

import {
  CreateInboxRequest,
  CreateInboxResponse,
  IntrospectRequest,
  IntrospectResponse,
  ListInboxResponse,
  ListTopicsResponse,
  InboxStudyDetail,
  GenerateReadmeResponse,
  FinalizeRequest,
  FinalizeResponse,
  UploadFilesResponse,
} from '../types/intake';

const API_BASE = '/api';

/**
 * Intake API client for study creation workflow.
 */
export const intakeApi = {
  /**
   * Create a new inbox study folder with initial spec.
   */
  async createInbox(request: CreateInboxRequest): Promise<CreateInboxResponse> {
    const response = await fetch(`${API_BASE}/intake/create`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(request),
    });

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to create inbox study');
    }

    return response.json();
  },

  /**
   * Run NX introspection on an inbox study.
   */
  async introspect(request: IntrospectRequest): Promise<IntrospectResponse> {
    const response = await fetch(`${API_BASE}/intake/introspect`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(request),
    });

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Introspection failed');
    }

    return response.json();
  },

  /**
   * List all studies in the inbox.
   */
  async listInbox(): Promise<ListInboxResponse> {
    const response = await fetch(`${API_BASE}/intake/list`);

    if (!response.ok) {
      throw new Error('Failed to fetch inbox studies');
    }

    return response.json();
  },

  /**
   * List existing topic folders.
   */
  async listTopics(): Promise<ListTopicsResponse> {
    const response = await fetch(`${API_BASE}/intake/topics`);

    if (!response.ok) {
      throw new Error('Failed to fetch topics');
    }

    return response.json();
  },

  /**
   * Get detailed information about an inbox study.
   */
  async getInboxStudy(studyName: string): Promise<InboxStudyDetail> {
    const response = await fetch(`${API_BASE}/intake/${encodeURIComponent(studyName)}`);

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to fetch inbox study');
    }

    return response.json();
  },

  /**
   * Delete an inbox study.
   */
  async deleteInboxStudy(studyName: string): Promise<{ success: boolean; deleted: string }> {
    const response = await fetch(`${API_BASE}/intake/${encodeURIComponent(studyName)}`, {
      method: 'DELETE',
    });

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to delete inbox study');
    }

    return response.json();
  },

  /**
   * Generate README for an inbox study using Claude AI.
   */
  async generateReadme(studyName: string): Promise<GenerateReadmeResponse> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/readme`,
      { method: 'POST' }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'README generation failed');
    }

    return response.json();
  },

  /**
   * Finalize an inbox study and move to studies directory.
   */
  async finalize(studyName: string, request: FinalizeRequest): Promise<FinalizeResponse> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/finalize`,
      {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(request),
      }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Finalization failed');
    }

    return response.json();
  },

  /**
   * Upload model files to an inbox study.
   */
  async uploadFiles(studyName: string, files: File[]): Promise<UploadFilesResponse> {
    const formData = new FormData();
    files.forEach((file) => {
      formData.append('files', file);
    });

    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/upload`,
      {
        method: 'POST',
        body: formData,
      }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'File upload failed');
    }

    return response.json();
  },

  /**
   * Upload context files to an inbox study.
   * Context files help Claude understand optimization goals.
   */
  async uploadContextFiles(studyName: string, files: File[]): Promise<UploadFilesResponse> {
    const formData = new FormData();
    files.forEach((file) => {
      formData.append('files', file);
    });

    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context`,
      {
        method: 'POST',
        body: formData,
      }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Context file upload failed');
    }

    return response.json();
  },

  /**
   * List context files for an inbox study.
   */
  async listContextFiles(studyName: string): Promise<{
    study_name: string;
    context_files: Array<{ name: string; path: string; size: number; extension: string }>;
    total: number;
  }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context`
    );

    if (!response.ok) {
      throw new Error('Failed to list context files');
    }

    return response.json();
  },

  /**
   * Delete a context file from an inbox study.
   */
  async deleteContextFile(studyName: string, filename: string): Promise<{ success: boolean; deleted: string }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context/${encodeURIComponent(filename)}`,
      { method: 'DELETE' }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to delete context file');
    }

    return response.json();
  },

  /**
   * Create design variables from selected expressions.
   */
  async createDesignVariables(
    studyName: string, 
    expressionNames: string[],
    options?: { autoBounds?: boolean; boundFactor?: number }
  ): Promise<{
    success: boolean;
    study_name: string;
    created: Array<{
      id: string;
      name: string;
      expression_name: string;
      bounds_min: number;
      bounds_max: number;
      baseline: number;
      units: string | null;
    }>;
    total_created: number;
  }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/design-variables`,
      {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          expression_names: expressionNames,
          auto_bounds: options?.autoBounds ?? true,
          bound_factor: options?.boundFactor ?? 0.5,
        }),
      }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to create design variables');
    }

    return response.json();
  },

  // ===========================================================================
  // Studio Endpoints (Atomizer Studio - Unified Creation Environment)
  // ===========================================================================

  /**
   * Create an anonymous draft study for Studio workflow.
   * Returns a temporary draft_id that can be renamed during finalization.
   */
  async createDraft(): Promise<{
    success: boolean;
    draft_id: string;
    inbox_path: string;
    spec_path: string;
    status: string;
  }> {
    const response = await fetch(`${API_BASE}/intake/draft`, {
      method: 'POST',
    });

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to create draft');
    }

    return response.json();
  },

  /**
   * Get extracted text content from context files.
   * Used for AI context injection.
   */
  async getContextContent(studyName: string): Promise<{
    success: boolean;
    study_name: string;
    content: string;
    files_read: Array<{
      name: string;
      extension: string;
      size: number;
      status: string;
      characters?: number;
      error?: string;
    }>;
    total_characters: number;
  }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context/content`
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to get context content');
    }

    return response.json();
  },

  /**
   * Finalize a Studio draft with rename support.
   * Enhanced version that supports renaming draft_xxx to proper names.
   */
  async finalizeStudio(
    studyName: string,
    request: {
      topic: string;
      newName?: string;
      runBaseline?: boolean;
    }
  ): Promise<{
    success: boolean;
    original_name: string;
    final_name: string;
    final_path: string;
    status: string;
    baseline_success: boolean | null;
    readme_generated: boolean;
  }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/finalize/studio`,
      {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          topic: request.topic,
          new_name: request.newName,
          run_baseline: request.runBaseline ?? false,
        }),
      }
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Studio finalization failed');
    }

    return response.json();
  },

  /**
   * Get complete draft information for Studio UI.
   * Convenience endpoint that returns everything the Studio needs.
   */
  async getStudioDraft(studyName: string): Promise<{
    success: boolean;
    draft_id: string;
    spec: Record<string, unknown>;
    model_files: string[];
    context_files: string[];
    introspection_available: boolean;
    design_variable_count: number;
    objective_count: number;
  }> {
    const response = await fetch(
      `${API_BASE}/intake/${encodeURIComponent(studyName)}/studio`
    );

    if (!response.ok) {
      const error = await response.json();
      throw new Error(error.detail || 'Failed to get studio draft');
    }

    return response.json();
  },
};

export default intakeApi;