import { DISABLE_LOCAL_AUTH, IS_PLATFORM } from "../constants/config";

const normalizePathForUrl = (value) => String(value || '').replace(/\\/g, '/');

const getProjectRelativePath = (filePath, projectRoot) => {
  const normalizedFilePath = normalizePathForUrl(filePath);
  const normalizedRoot = normalizePathForUrl(projectRoot).replace(/\/+$/, '');

  if (normalizedRoot && normalizedFilePath === normalizedRoot) {
    return '';
  }

  if (normalizedRoot && normalizedFilePath.startsWith(normalizedRoot + '/')) {
    return normalizedFilePath.slice(normalizedRoot.length + 1);
  }

  return normalizedFilePath.replace(/^\/+/, '');
};

const encodePathSegments = (relativePath) =>
  String(relativePath || '')
    .split('/')
    .filter(Boolean)
    .map((segment) => encodeURIComponent(segment))
    .join('/');

const appendAuthToken = (url) => {
  const token = localStorage.getItem('auth-token');
  if (!token) return url;
  const separator = url.includes('?') ? '&' : '?';
  return `${url}${separator}token=${encodeURIComponent(token)}`;
};

// Utility function for authenticated API calls
export const authenticatedFetch = (url, options = {}) => {
  const token = localStorage.getItem('auth-token');

  const defaultHeaders = {};

  // Only set Content-Type for non-FormData requests
  if (!(options.body instanceof FormData)) {
    defaultHeaders['Content-Type'] = 'application/json';
  }

  if (!IS_PLATFORM && !DISABLE_LOCAL_AUTH && token) {
    defaultHeaders['Authorization'] = `Bearer ${token}`;
  }

  return fetch(url, {
    ...options,
    headers: {
      ...defaultHeaders,
      ...options.headers,
    },
  }).then((response) => {
    const refreshedToken = response.headers.get('X-Refreshed-Token');
    if (refreshedToken) {
      localStorage.setItem('auth-token', refreshedToken);
    }
    return response;
  });
};

// API endpoints
export const api = {
  // Auth endpoints (no token required)
  auth: {
    status: () => fetch('/api/auth/status'),
    login: (username, password) => fetch('/api/auth/login', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ username, password }),
    }),
    register: (username, password) => fetch('/api/auth/register', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ username, password }),
    }),
    user: () => authenticatedFetch('/api/auth/user'),
    logout: () => authenticatedFetch('/api/auth/logout', { method: 'POST' }),
  },

  // Protected endpoints
  // config endpoint removed - no longer needed (frontend uses window.location)
  projects: () => authenticatedFetch('/api/projects'),
  alwaysOnDashboardEvents: (limit = 200, since) =>
    authenticatedFetch(`/api/always-on/events?limit=${encodeURIComponent(limit)}${since ? `&since=${encodeURIComponent(since)}` : ''}`),
  allCronJobs: () =>
    authenticatedFetch('/api/always-on/cron-jobs'),
  cronRunNow: (taskId) =>
    authenticatedFetch(`/api/always-on/cron-jobs/${encodeURIComponent(taskId)}/run-now`, { method: 'POST' }),
  cronStop: (taskId) =>
    authenticatedFetch(`/api/always-on/cron-jobs/${encodeURIComponent(taskId)}/stop`, { method: 'POST' }),
  cronDelete: (taskId) =>
    authenticatedFetch(`/api/always-on/cron-jobs/${encodeURIComponent(taskId)}`, { method: 'DELETE' }),
  projectDiscoveryContext: (projectName) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/discovery-context`),
  projectDiscoveryPlans: (projectName) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/discovery-plans`),
  executeProjectDiscoveryPlan: (projectName, planId, body = {}) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/discovery-plans/${encodeURIComponent(planId)}/execute`, {
      method: 'POST',
      body: JSON.stringify(body),
    }),
  discoveryPlanReport: (projectName, planId) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/discovery-plans/${encodeURIComponent(planId)}/report`),
  projectWorkCycles: (projectName) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/work-cycles`),
  applyWorkCycle: (projectName, cycleId) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/work-cycles/${encodeURIComponent(cycleId)}/apply`, {
      method: 'POST',
    }),
  archiveWorkCycle: (projectName, cycleId) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/work-cycles/${encodeURIComponent(cycleId)}/archive`, {
      method: 'POST',
    }),
  sessions: (projectName, limit = 5, offset = 0) =>
    authenticatedFetch(`/api/projects/${projectName}/sessions?limit=${limit}&offset=${offset}`),
  // Unified endpoint — all providers through one URL
  unifiedSessionMessages: (sessionId, provider = 'claude', { projectName = '', projectPath = '', limit = null, offset = 0 } = {}) => {
    const params = new URLSearchParams();
    params.append('provider', provider);
    if (projectName) params.append('projectName', projectName);
    if (projectPath) params.append('projectPath', projectPath);
    if (limit !== null) {
      params.append('limit', String(limit));
      params.append('offset', String(offset));
    }
    const queryString = params.toString();
    return authenticatedFetch(`/api/sessions/${encodeURIComponent(sessionId)}/messages${queryString ? `?${queryString}` : ''}`);
  },
  renameProject: (projectName, displayName) =>
    authenticatedFetch(`/api/projects/${projectName}/rename`, {
      method: 'PUT',
      body: JSON.stringify({ displayName }),
    }),
  deleteSession: (projectName, sessionId, opts = {}) => {
    const params = new URLSearchParams();
    if (opts.sessionKind) params.append('sessionKind', opts.sessionKind);
    if (opts.parentSessionId) params.append('parentSessionId', opts.parentSessionId);
    if (opts.relativeTranscriptPath) params.append('relativeTranscriptPath', opts.relativeTranscriptPath);
    const query = params.toString();
    return authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/sessions/${encodeURIComponent(sessionId)}${query ? `?${query}` : ''}`, {
      method: 'DELETE',
    });
  },
  renameSession: (sessionId, summary, provider) =>
    authenticatedFetch(`/api/sessions/${sessionId}/rename`, {
      method: 'PUT',
      body: JSON.stringify({ summary, provider }),
    }),
  deleteProject: (projectName, force = false) =>
    authenticatedFetch(`/api/projects/${projectName}${force ? '?force=true' : ''}`, {
      method: 'DELETE',
    }),
  searchConversationsUrl: (query, limit = 50) => {
    const token = localStorage.getItem('auth-token');
    const params = new URLSearchParams({ q: query, limit: String(limit) });
    if (token) params.set('token', token);
    return `/api/search/conversations?${params.toString()}`;
  },
  createProject: (path) =>
    authenticatedFetch('/api/projects/create', {
      method: 'POST',
      body: JSON.stringify({ path }),
    }),
  createWorkspace: (workspaceData) =>
    authenticatedFetch('/api/projects/create-workspace', {
      method: 'POST',
      body: JSON.stringify(workspaceData),
    }),
  readFile: (projectName, filePath) =>
    authenticatedFetch(`/api/projects/${projectName}/file?filePath=${encodeURIComponent(filePath)}`),
  readFileBlob: (projectName, filePath) =>
    authenticatedFetch(`/api/projects/${projectName}/files/content?path=${encodeURIComponent(filePath)}`),
  saveFile: (projectName, filePath, content) =>
    authenticatedFetch(`/api/projects/${projectName}/file`, {
      method: 'PUT',
      body: JSON.stringify({ filePath, content }),
    }),
  getFiles: (projectName, options = {}) =>
    authenticatedFetch(`/api/projects/${projectName}/files`, options),

  // File operations
  createFile: (projectName, { path, type, name }) =>
    authenticatedFetch(`/api/projects/${projectName}/files/create`, {
      method: 'POST',
      body: JSON.stringify({ path, type, name }),
    }),

  renameFile: (projectName, { oldPath, newName }) =>
    authenticatedFetch(`/api/projects/${projectName}/files/rename`, {
      method: 'PUT',
      body: JSON.stringify({ oldPath, newName }),
    }),

  deleteFile: (projectName, { path, type }) =>
    authenticatedFetch(`/api/projects/${projectName}/files`, {
      method: 'DELETE',
      body: JSON.stringify({ path, type }),
    }),

  uploadFiles: (projectName, formData) =>
    authenticatedFetch(`/api/projects/${projectName}/files/upload`, {
      method: 'POST',
      body: formData,
      headers: {},
    }),

  projectPreviewUrl: (projectName, filePath, projectRoot) => {
    const relativePath = getProjectRelativePath(filePath, projectRoot);
    const encoded = encodePathSegments(relativePath);
    return appendAuthToken(
      `/api/projects/${encodeURIComponent(projectName)}/preview/${encoded}`,
    );
  },

  downloadProjectZip: (projectName) =>
    authenticatedFetch(`/api/projects/${encodeURIComponent(projectName)}/download`),

  fileDownloadUrl: (projectName, filePath) =>
    appendAuthToken(
      `/api/projects/${encodeURIComponent(projectName)}/files/content?path=${encodeURIComponent(filePath)}&download=1`,
    ),

  // TaskMaster endpoints
  taskmaster: {
    // Initialize TaskMaster in a project
    init: (projectName) =>
      authenticatedFetch(`/api/taskmaster/init/${projectName}`, {
        method: 'POST',
      }),

    // Add a new task
    addTask: (projectName, { prompt, title, description, priority, dependencies }) =>
      authenticatedFetch(`/api/taskmaster/add-task/${projectName}`, {
        method: 'POST',
        body: JSON.stringify({ prompt, title, description, priority, dependencies }),
      }),

    // Parse PRD to generate tasks
    parsePRD: (projectName, { fileName, numTasks, append }) =>
      authenticatedFetch(`/api/taskmaster/parse-prd/${projectName}`, {
        method: 'POST',
        body: JSON.stringify({ fileName, numTasks, append }),
      }),

    // Get available PRD templates
    getTemplates: () =>
      authenticatedFetch('/api/taskmaster/prd-templates'),

    // Apply a PRD template
    applyTemplate: (projectName, { templateId, fileName, customizations }) =>
      authenticatedFetch(`/api/taskmaster/apply-template/${projectName}`, {
        method: 'POST',
        body: JSON.stringify({ templateId, fileName, customizations }),
      }),

    // Update a task
    updateTask: (projectName, taskId, updates) =>
      authenticatedFetch(`/api/taskmaster/update-task/${projectName}/${taskId}`, {
        method: 'PUT',
        body: JSON.stringify(updates),
      }),
  },

  // Browse filesystem for project suggestions
  browseFilesystem: (dirPath = null) => {
    const params = new URLSearchParams();
    if (dirPath) params.append('path', dirPath);

    return authenticatedFetch(`/api/browse-filesystem?${params}`);
  },

  createFolder: (folderPath) =>
    authenticatedFetch('/api/create-folder', {
      method: 'POST',
      body: JSON.stringify({ path: folderPath }),
    }),

  // User endpoints
  user: {
    gitConfig: () => authenticatedFetch('/api/user/git-config'),
    updateGitConfig: (gitName, gitEmail) =>
      authenticatedFetch('/api/user/git-config', {
        method: 'POST',
        body: JSON.stringify({ gitName, gitEmail }),
      }),
    onboardingStatus: () => authenticatedFetch('/api/user/onboarding-status'),
    completeOnboarding: () =>
      authenticatedFetch('/api/user/complete-onboarding', {
        method: 'POST',
      }),
  },

  // Generic GET method for any endpoint
  get: (endpoint) => authenticatedFetch(`/api${endpoint}`),

  // Generic POST method for any endpoint
  post: (endpoint, body) => authenticatedFetch(`/api${endpoint}`, {
    method: 'POST',
    ...(body instanceof FormData ? { body } : { body: JSON.stringify(body) }),
  }),

  // Generic PUT method for any endpoint
  put: (endpoint, body) => authenticatedFetch(`/api${endpoint}`, {
    method: 'PUT',
    body: JSON.stringify(body),
  }),

  // Generic DELETE method for any endpoint
  delete: (endpoint, options = {}) => authenticatedFetch(`/api${endpoint}`, {
    method: 'DELETE',
    ...options,
  }),
};