import axios, { AxiosError } from 'axios';
import { apiClient } from './httpClient';
import { toolsService } from './toolsService';
import { getCurrentUserSub } from '../auth/AuthProvider';
import {
  Dashboard,
  Organisation,
  CreateOrganisationRequest,
  UpdateOrganisationRequest,
  Portfolio,
  CreatePortfolioRequest,
  UpdatePortfolioRequest,
  Programme,
  CreateProgrammeRequest,
  UpdateProgrammeRequest,
  Instrument,
  Project,
  CreateProjectRequest,
  UpdateProjectRequest,
  UpdateProjectStatusRequest,
  Activity,
  CreateActivityRequest,
  UpdateActivityRequest,
  Milestone,
  CreateMilestoneRequest,
  UpdateMilestoneRequest,
  Award,
  CreateAwardRequest,
  Contract,
  CreateContractRequest,
  UpdateContractRequest,
  ExecuteContractRequest,
  Budget,
  CreateBudgetRequest,
  Disbursement,
  CreateDisbursementRequest,
  UpdateDisbursementRequest,
  Indicator,
  CreateIndicatorRequest,
  Evidence,
  UpdateEvidenceRequest,
  Risk,
  CreateRiskRequest,
  UpdateRiskRequest,
  User,
  UserFilterRequest,
  Invite,
  InviteRequest,
  InviteUserRequest,
  AuditLog,
  ProblemDetails,
  ActivityStatus,
} from '../types';

import { parseFriendlyError, FriendlyError } from '../utils/apiErrorParser';
import { registerUserEmail, registerUserEmails } from '../lib/formatters';

// Helper to extract ProblemDetails from Axios error or unknown error
export function parseApiError(error: unknown): ProblemDetails {
  if (axios.isAxiosError(error)) {
    const axiosErr = error as AxiosError<ProblemDetails>;
    if (axiosErr.response?.data && typeof axiosErr.response.data === 'object') {
      return axiosErr.response.data;
    }
  }

  const friendly = parseFriendlyError(error);
  return {
    title: friendly.title,
    detail: friendly.message,
    status: friendly.statusCode || 500,
  };
}

export { parseFriendlyError };
export type { FriendlyError };

// ==========================================
// 1. Executive Dashboard APIs
// ==========================================
export const getDashboard = async (): Promise<Dashboard> => {
  const res = await apiClient.get<Dashboard>('/v1/api/governance/dashboard');
  return res.data;
};

// ==========================================
// 2. Governance & Structure APIs
// ==========================================

/**
 * Normalizes an Organisation object from backend responses.
 * Robustly maps status across variations (status, Status, activityStatus, approvalStatus, statusId, isActive).
 */
export const normalizeOrganisation = (raw: any): Organisation => {
  if (!raw) return raw;
  const status =
    raw.status ??
    raw.Status ??
    raw.activityStatus ??
    raw.ActivityStatus ??
    raw.approvalStatus ??
    raw.ApprovalStatus ??
    raw.statusId ??
    raw.StatusId ??
    raw.state ??
    raw.State ??
    (raw.isActive !== undefined ? (raw.isActive ? 1 : 2) : undefined) ??
    (raw.IsActive !== undefined ? (raw.IsActive ? 1 : 2) : undefined) ??
    ActivityStatus.Active;

  return {
    ...raw,
    id: raw.id ?? raw.Id ?? raw.organisationId ?? raw.OrganisationId,
    name: raw.name ?? raw.Name ?? null,
    registrationNo: raw.registrationNo ?? raw.RegistrationNo ?? raw.regNo ?? raw.RegNo ?? null,
    email: raw.email ?? raw.Email ?? null,
    type: raw.type ?? raw.Type ?? raw.organisationType ?? raw.OrganisationType ?? 5,
    status,
    createdAt: raw.createdAt ?? raw.CreatedAt ?? new Date().toISOString(),
    createdBy: raw.createdBy ?? raw.CreatedBy ?? '',
  };
};

export const getOrganisations = async (page = 1, pageSize = 100): Promise<Organisation[]> => {
  const res = await apiClient.get<any[]>('/v1/api/governance/organisations', {
    params: { page, pageSize },
  });
  const list = res.data || [];
  return list.map(normalizeOrganisation);
};

export const getOrganisation = async (organisationId: string | number): Promise<Organisation> => {
  const hashedOrgId = await toolsService.resolveOrganisationId(organisationId);
  const res = await apiClient.get<any>(`/v1/api/governance/organisations/${hashedOrgId}`);
  return normalizeOrganisation(res.data);
};

export const createOrganisation = async (payload: CreateOrganisationRequest): Promise<Organisation> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/governance/organisations', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateOrganisation = async (payload: UpdateOrganisationRequest): Promise<Organisation> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.put('/v1/api/governance/organisations', {
    ...payload,
    updatedBy: userSub || undefined,
  });
  return res.data;
};

export const getPortfolios = async (organisationId: string | number): Promise<Portfolio[]> => {
  const hashedOrgId = await toolsService.resolveOrganisationId(organisationId);
  const res = await apiClient.get<Portfolio[]>(`/v1/api/governance/organisations/${hashedOrgId}/portfolio`);
  return res.data || [];
};

export const getPortfolio = async (portfolioId: string | number): Promise<Portfolio> => {
  const hashedPortId = await toolsService.resolvePortfolioId(portfolioId);
  const res = await apiClient.get<Portfolio | Portfolio[]>(`/v1/api/governance/portfolios/${hashedPortId}`);
  return Array.isArray(res.data) ? res.data[0] : res.data;
};

export const getAllPortfolios = async (): Promise<Portfolio[]> => {
  try {
    const orgs = await getOrganisations(1, 10);
    if (orgs.length > 0) {
      const results = await Promise.allSettled(
        orgs.map((org) => getPortfolios(org.id))
      );
      const combined = results
        .filter((r): r is PromiseFulfilledResult<Portfolio[]> => r.status === 'fulfilled')
        .flatMap((r) => r.value);
      if (combined.length > 0) return combined;
    }
    const res = await apiClient.get<Portfolio[]>('/v1/api/governance/organisations/portfolio');
    return res.data || [];
  } catch {
    return [];
  }
};

export const getPortfolioProgrammes = async (portfolioId: string | number): Promise<Programme[]> => {
  const hashedPortId = await toolsService.resolvePortfolioId(portfolioId);
  const res = await apiClient.get<Programme[]>(`/v1/api/governance/portfolios/${hashedPortId}/programmes`);
  return res.data || [];
};

export const createPortfolio = async (payload: CreatePortfolioRequest): Promise<Portfolio> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/governance/organisations/portfolio', {
    ...payload,
    ownerId: payload.ownerId || userSub || undefined,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updatePortfolio = async (payload: UpdatePortfolioRequest): Promise<Portfolio> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.put('/v1/api/governance/organisations/portfolio', {
    ...payload,
    ownerId: payload.ownerId || userSub || undefined,
    updatedBy: userSub || undefined,
  });
  return res.data;
};

export const getProgrammes = async (portfolioId: string | number): Promise<Programme[]> => {
  const hashedPortId = await toolsService.resolvePortfolioId(portfolioId);
  const res = await apiClient.get<Programme[]>(`/v1/api/governance/programmes/${hashedPortId}`);
  return res.data || [];
};

export const getInstruments = async (programmeId: string | number): Promise<Instrument[]> => {
  const hashedProgId = await toolsService.resolveProgrammeId(programmeId);
  const res = await apiClient.get<Instrument[]>(`/v1/api/governance/instruments/${hashedProgId}`);
  return res.data || [];
};

// ==========================================
// 3. Project & Milestone Management APIs
// ==========================================
export const getAllProgrammes = async (page = 1, pageSize = 100): Promise<Programme[]> => {
  const res = await apiClient.get<Programme[]>(`/v1/api/projects/programme/${page}/${pageSize}`);
  return res.data || [];
};

export const getProgramme = async (programmeId: string | number): Promise<Programme> => {
  const hashedProgId = await toolsService.resolveProgrammeId(programmeId);
  const res = await apiClient.get<Programme>(`/v1/api/projects/programme/${hashedProgId}`);
  return res.data;
};

export const getProgrammeProjects = async (programmeId: string | number): Promise<Project[]> => {
  const hashedProgId = await toolsService.resolveProgrammeId(programmeId);
  const res = await apiClient.get<Project[]>(`/v1/api/projects/${hashedProgId}/programme`);
  return res.data || [];
};

export const createProgramme = async (payload: CreateProgrammeRequest): Promise<Programme> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/projects/programme', {
    ...payload,
    ownerId: payload.ownerId || userSub || undefined,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateProgramme = async (payload: UpdateProgrammeRequest): Promise<Programme> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.put('/v1/api/projects/programme', {
    ...payload,
    ownerId: payload.ownerId || userSub || undefined,
    updatedBy: userSub || undefined,
  });
  return res.data;
};

export const getProjects = async (page = 1, pageSize = 100): Promise<Project[]> => {
  const res = await apiClient.get<Project[]>('/v1/api/projects', {
    params: { page, pageSize },
  });
  return res.data || [];
};

export const getProject = async (projectId: string | number): Promise<Project> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<Project | Project[]>(`/v1/api/projects/${hashedProjectId}`);
  return Array.isArray(res.data) ? res.data[0] : res.data;
};

export const createProject = async (payload: CreateProjectRequest): Promise<Project> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/projects', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateProject = async (payload: UpdateProjectRequest): Promise<Project> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.put('/v1/api/projects', {
    ...payload,
    updatedBy: userSub || undefined,
  });
  return res.data;
};

export const updateProjectStatus = async (payload: UpdateProjectStatusRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.put('/v1/api/projects/status', {
    ...payload,
    updatedBy: userSub || undefined,
  });
};

export const getActivities = async (projectId: string | number): Promise<Activity[]> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<Activity[]>(`/v1/api/projects/${hashedProjectId}/activities`);
  return res.data || [];
};

export const getActivity = async (activityId: string | number): Promise<Activity> => {
  const hashedActivityId = await toolsService.encodeId(activityId);
  const res = await apiClient.get<Activity>(`/v1/api/projects/activities/${hashedActivityId}`);
  return res.data;
};

export const createActivity = async (payload: CreateActivityRequest): Promise<Activity> => {
  const userSub = getCurrentUserSub();
  const body: any = {
    ...payload,
    milestoneId:
      payload.milestoneId !== undefined && payload.milestoneId !== null && payload.milestoneId !== ''
        ? Number(payload.milestoneId)
        : null,
    createdBy: userSub || undefined,
  };
  try {
    const res = await apiClient.post('/v1/api/projects/activities', body);
    return res.data;
  } catch (err: any) {
    if (err?.response?.status === 405) {
      const res = await apiClient.put('/v1/api/projects/activities', body);
      return res.data;
    }
    throw err;
  }
};

export const updateActivity = async (payload: UpdateActivityRequest): Promise<Activity> => {
  const userSub = getCurrentUserSub();
  const body: any = {
    ...payload,
    milestoneId:
      payload.milestoneId !== undefined && payload.milestoneId !== null && payload.milestoneId !== ''
        ? Number(payload.milestoneId)
        : null,
    updatedBy: userSub || undefined,
  };
  try {
    const res = await apiClient.put('/v1/api/projects/activities', body);
    return res.data;
  } catch (err: any) {
    if (err?.response?.status === 404 || err?.response?.status === 405) {
      const res = await apiClient.put('/v1/api/projects/activity', body);
      return res.data;
    }
    throw err;
  }
};

export const getMilestones = async (projectId: string | number): Promise<Milestone[]> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<Milestone[]>(`/v1/api/projects/${hashedProjectId}/milestones`);
  return res.data || [];
};

export const getAllMilestones = async (page = 1, pageSize = 100): Promise<Milestone[]> => {
  const res = await apiClient.get<Milestone[]>(`/v1/api/projects/milestones/${page}/${pageSize}`);
  return res.data || [];
};

export const getMilestone = async (milestoneId: string | number): Promise<Milestone> => {
  const hashedMilestoneId = await toolsService.encodeId(milestoneId);
  const res = await apiClient.get<Milestone>(`/v1/api/projects/milestones/${hashedMilestoneId}`);
  return res.data;
};

export const createMilestone = async (payload: CreateMilestoneRequest): Promise<Milestone> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/evidence/milestones', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateMilestone = async (payload: UpdateMilestoneRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.put('/v1/api/projects/milestone', {
    ...payload,
    updatedBy: userSub || undefined,
  });
};

export const getProjectIndicators = async (projectId: string | number): Promise<Indicator[]> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<Indicator[]>(`/v1/api/projects/indicators/project/${hashedProjectId}`);
  return res.data || [];
};

export const getProjectRisks = async (projectId: string | number): Promise<Risk[]> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<any[]>(`/v1/api/projects/${hashedProjectId}/risks`);
  const list = res.data || [];
  return list.map(normalizeRisk);
};

// ==========================================
// 4. Grant & Financial Management APIs
// ==========================================
export const getAwards = async (page = 1, pageSize = 100): Promise<Award[]> => {
  const res = await apiClient.get<Award[]>('/v1/api/grants/awards', {
    params: { page, pageSize },
  });
  return res.data || [];
};

export const getAward = async (awardId: string | number): Promise<Award> => {
  const hashedAwardId = await toolsService.resolveAwardId(awardId);
  const res = await apiClient.get<Award>(`/v1/api/grants/awards/${hashedAwardId}`);
  return res.data;
};

export const createAward = async (payload: CreateAwardRequest): Promise<Award> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/grants/awards', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const getContracts = async (page = 1, pageSize = 100): Promise<Contract[]> => {
  const res = await apiClient.get<Contract[]>('/v1/api/grants/contracts', {
    params: { page, pageSize },
  });
  return res.data || [];
};

export const getContract = async (contractId: string | number): Promise<Contract> => {
  const hashedContractId = await toolsService.resolveContractId(contractId);
  const res = await apiClient.get<Contract>(`/v1/api/grants/contracts/${hashedContractId}`);
  return res.data;
};

export const createContract = async (payload: CreateContractRequest): Promise<Contract> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/grants/contracts', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateContract = async (payload: UpdateContractRequest): Promise<void> => {
  await apiClient.put('/v1/api/grants/contracts', payload);
};

export const uploadContractFile = async (
  contractId: string | number,
  file: File | FormData
): Promise<void> => {
  const hashedContractId = await toolsService.resolveContractId(contractId);
  const formData = file instanceof FormData ? file : new FormData();
  if (file instanceof File) {
    formData.append('file', file);
  }
  await apiClient.post(`/v1/api/grants/contracts/${hashedContractId}`, formData, {
    headers: { 'Content-Type': 'multipart/form-data' },
  });
};

export const getContractSecureLink = async (contractId: string | number): Promise<string> => {
  const hashedContractId = await toolsService.resolveContractId(contractId);
  const res = await apiClient.get<string>(`/v1/api/grants/contracts/${hashedContractId}/securelink`);
  return res.data;
};

export const executeContract = async (payload: ExecuteContractRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.post('/v1/api/grants/contracts/execute', {
    ...payload,
    executedBy: userSub || undefined,
  });
};

export const getBudgets = async (page = 1, pageSize = 100): Promise<Budget[]> => {
  const res = await apiClient.get<Budget[]>('/v1/api/grants/budgets', {
    params: { page, pageSize },
  });
  return res.data || [];
};

export const getBudget = async (budgetId: string | number): Promise<Budget> => {
  const hashedBudgetId = await toolsService.encodeId(budgetId);
  const res = await apiClient.get<Budget>(`/v1/api/grants/budgets/${hashedBudgetId}`);
  return res.data;
};

export const createBudget = async (payload: CreateBudgetRequest): Promise<Budget> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/grants/budgets', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

// ==========================================
// 5. Execution (Disbursements & Risks) APIs
// ==========================================
export const getDisbursements = async (page = 1, pageSize = 100): Promise<Disbursement[]> => {
  const res = await apiClient.get<Disbursement[]>('/v1/api/execution/disbursements', {
    params: { page, pageSize },
  });
  return res.data || [];
};

export const getDisbursement = async (disbursementId: string | number): Promise<Disbursement> => {
  const hashedDisbId = await toolsService.encodeId(disbursementId);
  const res = await apiClient.get<Disbursement>(`/v1/api/execution/disbursements/${hashedDisbId}`);
  return res.data;
};

export const createDisbursement = async (payload: CreateDisbursementRequest): Promise<Disbursement> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/execution/disbursements', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const updateDisbursement = async (payload: UpdateDisbursementRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.put('/v1/api/execution/disbursements', {
    ...payload,
    updatedBy: userSub || undefined,
  });
};

export const approveDisbursement = async (disbursementId: string | number): Promise<void> => {
  const hashedDisbId = await toolsService.encodeId(disbursementId);
  const userSub = getCurrentUserSub();
  await apiClient.post(`/v1/api/execution/disbursements/${hashedDisbId}/approve`, {
    approvedBy: userSub || undefined,
  });
};

/**
 * Normalizes a Risk record from backend responses.
 * Robustly parses Likelihood (1-5) and Impact (1-5), supporting strings, numbers, and case variations.
 */
export const normalizeRisk = (raw: any): Risk => {
  if (!raw) return raw;

  const rawLik = raw.likelihood ?? raw.Likelihood ?? raw.riskLikelihood ?? raw.RiskLikelihood;
  const rawImp = raw.impact ?? raw.Impact ?? raw.riskImpact ?? raw.RiskImpact;

  const parseScore = (val: any, defaultVal: number): number => {
    if (typeof val === 'number' && !isNaN(val)) {
      return Math.min(5, Math.max(1, Math.round(val)));
    }
    if (typeof val === 'string') {
      const parsed = parseInt(val, 10);
      if (!isNaN(parsed) && parsed >= 1 && parsed <= 5) {
        return parsed;
      }
      const lower = val.toLowerCase().trim();
      if (lower.includes('rare') || lower.includes('insignificant') || lower.includes('trivial') || lower === '1') return 1;
      if (lower.includes('unlikely') || lower.includes('minor') || lower === '2') return 2;
      if (lower.includes('possible') || lower.includes('moderate') || lower.includes('medium') || lower === '3') return 3;
      if (lower.includes('likely') || lower.includes('major') || lower.includes('high') || lower === '4') return 4;
      if (lower.includes('almost') || lower.includes('certain') || lower.includes('severe') || lower.includes('critical') || lower.includes('catastrophic') || lower === '5') return 5;
    }
    return defaultVal;
  };

  const likelihood = parseScore(rawLik, 3);
  const impact = parseScore(rawImp, 2);

  return {
    ...raw,
    id: raw.id ?? raw.Id ?? raw.riskId ?? raw.RiskId,
    projectId: raw.projectId ?? raw.ProjectId,
    name: raw.name ?? raw.Name ?? null,
    description: raw.description ?? raw.Description ?? null,
    likelihood,
    impact,
    createdBy: raw.createdBy ?? raw.CreatedBy ?? '',
    createdAt: raw.createdAt ?? raw.CreatedAt ?? new Date().toISOString(),
    owner: raw.owner ?? raw.Owner ?? raw.riskOwner ?? raw.RiskOwner ?? raw.createdBy ?? raw.CreatedBy ?? '',
    mitigationAction: raw.mitigationAction ?? raw.MitigationAction ?? raw.mitigation ?? raw.Mitigation ?? '',
    status: raw.status ?? raw.Status,
  };
};

export const getAllRisks = async (page = 1, pageSize = 100): Promise<Risk[]> => {
  const res = await apiClient.get<any[]>('/v1/api/execution/risks', {
    params: { page, pageSize },
  });
  const list = res.data || [];
  return list.map(normalizeRisk);
};

export const getRisk = async (riskId: string | number): Promise<Risk> => {
  const hashedRiskId = await toolsService.encodeId(riskId);
  const res = await apiClient.get<any>(`/v1/api/execution/risks/${hashedRiskId}`);
  return normalizeRisk(res.data);
};

export const createRisk = async (payload: CreateRiskRequest): Promise<Risk> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/execution/risks', {
    ...payload,
    likelihood: Number(payload.likelihood),
    impact: Number(payload.impact),
    createdBy: userSub || undefined,
  });
  return normalizeRisk(res.data);
};

export const updateRisk = async (payload: UpdateRiskRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.put('/v1/api/execution/risks', {
    ...payload,
    likelihood: Number(payload.likelihood),
    impact: Number(payload.impact),
    updatedBy: userSub || undefined,
  });
};

// ==========================================
// 6. Evidence & M&E APIs
// ==========================================
export const getAllIndicators = async (page = 1, pageSize = 100): Promise<Indicator[]> => {
  const res = await apiClient.get<Indicator[]>(`/v1/api/evidence/indicators/${page}/${pageSize}`);
  return res.data || [];
};

export const getIndicator = async (indicatorId: string | number): Promise<Indicator> => {
  const hashedIndId = await toolsService.encodeId(indicatorId);
  const res = await apiClient.get<Indicator>(`/v1/api/evidence/indicators/${hashedIndId}`);
  return res.data;
};

export const createIndicator = async (payload: CreateIndicatorRequest): Promise<Indicator> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/evidence/indicators', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const recordIndicatorActual = async (indicatorId: string | number, actualAmount: number): Promise<void> => {
  const hashedIndId = await toolsService.encodeId(indicatorId);
  const userSub = getCurrentUserSub();
  await apiClient.post(`/v1/api/evidence/indicators/${hashedIndId}/actuals/${actualAmount}`, {
    recordedBy: userSub || undefined,
  });
};

export const getEvidenceFiles = async (page = 1, pageSize = 100): Promise<Evidence[]> => {
  const res = await apiClient.get<Evidence[]>(`/v1/api/evidence/files/${page}/${pageSize}`);
  return res.data || [];
};

export const getAllEvidence = async (page = 1, pageSize = 100): Promise<Evidence[]> => {
  return getEvidenceFiles(page, pageSize);
};

export const getEvidence = async (evidenceId: string | number): Promise<Evidence> => {
  const hashedEvId = await toolsService.encodeId(evidenceId);
  const res = await apiClient.get<Evidence>(`/v1/api/evidence/${hashedEvId}`);
  return res.data;
};

export const getEvidenceSecureLink = async (evidenceId: string | number): Promise<string> => {
  const hashedEvId = await toolsService.encodeId(evidenceId);
  const res = await apiClient.get<string>(`/v1/api/evidence/${hashedEvId}/securelink`);
  return res.data;
};

export const getMilestoneEvidence = async (milestoneId: string | number): Promise<Evidence[]> => {
  const hashedMId = await toolsService.encodeId(milestoneId);
  const res = await apiClient.get<Evidence[]>(`/v1/api/evidence/milestone/${hashedMId}`);
  return res.data || [];
};

export const getProjectEvidence = async (projectId: string | number): Promise<Evidence[]> => {
  const hashedProjectId = await toolsService.resolveProjectId(projectId);
  const res = await apiClient.get<Evidence[]>(`/v1/api/evidence/${hashedProjectId}`);
  return res.data || [];
};

export const uploadEvidenceFile = async (formData: FormData): Promise<Evidence> => {
  const userSub = getCurrentUserSub();
  if (userSub && !formData.get('userId')) {
    formData.append('userId', userSub);
  }
  const res = await apiClient.put<Evidence>('/v1/api/evidence/file', formData, {
    headers: { 'Content-Type': 'multipart/form-data' },
  });
  return res.data;
};

export const updateEvidence = async (payload: UpdateEvidenceRequest): Promise<void> => {
  const userSub = getCurrentUserSub();
  await apiClient.put('/v1/api/evidence', {
    ...payload,
    updatedBy: userSub || undefined,
  });
};

// ==========================================
// 7. Users & Background Integration APIs
// ==========================================
export const getUsers = async (
  page = 1,
  pageSize = 100,
  filter: UserFilterRequest = {}
): Promise<User[]> => {
  const res = await apiClient.post<User[]>(`/v1/api/users/${page}/${pageSize}`, filter);
  const list = res.data || [];
  registerUserEmails(list);
  return list;
};

export const getUser = async (userId: string): Promise<User> => {
  const res = await apiClient.get<User>(`/v1/api/users/${userId}`);
  if (res.data?.id && res.data?.email) {
    registerUserEmail(res.data.id, res.data.email);
  }
  return res.data;
};

export const getCurrentUser = async (): Promise<User> => {
  const userSub = getCurrentUserSub();
  if (userSub) {
    try {
      const u = await getUser(userSub);
      if (u?.id && u?.email) {
        registerUserEmail(u.id, u.email);
      }
      return u;
    } catch {
      // Fallback
    }
  }
  return {
    id: userSub || 'user-1',
    email: null,
    status: ActivityStatus.Active,
    lastLoginAt: new Date().toISOString(),
  };
};

export const updateUserStatus = async (userId: string, status: ActivityStatus | number): Promise<void> => {
  await apiClient.get(`/v1/api/users/${userId}/status/${status}`);
};

export {
  syncUserAccount,
  ensureUserSynced,
  isUserSyncedInBrowser,
  saveUserSyncInBrowser,
  clearUserSyncInBrowser,
  getUserSyncRecord,
  isActivationPending,
  setActivationPending,
  getActivationPendingReason,
} from './userSyncService';

/**
 * Synchronizes the authenticated user with the backend to enable the user in the system.
 * By default, sync is saved in the browser to prevent hotspotting the sync endpoint.
 */
export const syncUser = async (
  userData?: {
    id?: string;
    sub?: string;
    email?: string | null;
    name?: string | null;
    role?: string | null;
    tenant?: string | null;
  },
  force = false
): Promise<boolean> => {
  const { ensureUserSynced } = await import('./userSyncService');
  return ensureUserSynced(userData?.sub || userData?.id, undefined, userData, force);
};

export const syncIntegration = async (force = true): Promise<void> => {
  const { ensureUserSynced } = await import('./userSyncService');
  await ensureUserSynced(undefined, undefined, undefined, force);
};

// ==========================================
// 8. Communications & Invites APIs
// ==========================================
export const sendInvite = async (payload: InviteRequest): Promise<Invite> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post<Invite>('/v1/api/communications/invite', {
    ...payload,
    createdBy: userSub || undefined,
  });
  return res.data;
};

export const getInvites = async (page = 1, pageSize = 100): Promise<Invite[]> => {
  const res = await apiClient.get<Invite[]>(`/v1/api/communications/invites/${page}/${pageSize}`);
  return res.data || [];
};

export const getApplicantInvite = async (applicantUserId: string): Promise<Invite> => {
  const res = await apiClient.get<Invite>(`/v1/api/communications/invites/applicant/${applicantUserId}`);
  return res.data;
};

export const getApplicantInvites = async (applicantUserId: string): Promise<Invite[]> => {
  const res = await apiClient.get<Invite[]>(`/v1/api/communications/invites/${applicantUserId}`);
  return res.data || [];
};

// Legacy compatibility helpers
export const inviteUser = async (payload: InviteUserRequest): Promise<User> => {
  const userSub = getCurrentUserSub();
  const res = await apiClient.post('/v1/api/governance/users/invite', {
    ...payload,
    invitedBy: userSub || undefined,
  });
  return res.data;
};

export const revokeUser = async (userId: string): Promise<void> => {
  await apiClient.delete(`/v1/api/governance/users/${userId}`);
};

export const getAuditLogs = async (): Promise<AuditLog[]> => {
  try {
    const res = await apiClient.get<AuditLog[]>('/v1/api/governance/audit');
    return res.data || [];
  } catch {
    return [];
  }
};