/**
 * SDK API Client — Operational methods.
 * (checkpoints, flow, modules, UCCA, document import, screening, health)
 */

import {
  APIResponse,
  CheckpointValidationResult,
  FetchContext,
  CheckpointStatus,
} from './api-client-types'

// ---------------------------------------------------------------------------
// Checkpoint Validation
// ---------------------------------------------------------------------------

/**
 * Validate a specific checkpoint
 */
export async function validateCheckpoint(
  ctx: FetchContext,
  checkpointId: string,
  data?: unknown
): Promise<CheckpointValidationResult> {
  const response = await ctx.fetchWithRetry<APIResponse<CheckpointValidationResult>>(
    `${ctx.baseUrl}/checkpoints/validate`,
    {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        tenantId: ctx.tenantId,
        checkpointId,
        data,
      }),
    }
  )

  if (!response.success || !response.data) {
    throw ctx.createError(response.error || 'Checkpoint validation failed', 500, true)
  }

  return response.data
}

/**
 * Get all checkpoint statuses
 */
export async function getCheckpoints(
  ctx: FetchContext
): Promise<Record<string, CheckpointStatus>> {
  const response = await ctx.fetchWithRetry<APIResponse<Record<string, CheckpointStatus>>>(
    `${ctx.baseUrl}/checkpoints?tenantId=${encodeURIComponent(ctx.tenantId)}`,
    {
      method: 'GET',
      headers: { 'Content-Type': 'application/json' },
    }
  )

  return response.data || {}
}

// ---------------------------------------------------------------------------
// Flow Navigation
// ---------------------------------------------------------------------------

/**
 * Get current flow state
 */
export async function getFlowState(ctx: FetchContext): Promise<{
  currentStep: string
  currentPhase: 1 | 2
  completedSteps: string[]
  suggestions: Array<{ stepId: string; reason: string }>
}> {
  const response = await ctx.fetchWithRetry<APIResponse<{
    currentStep: string
    currentPhase: 1 | 2
    completedSteps: string[]
    suggestions: Array<{ stepId: string; reason: string }>
  }>>(
    `${ctx.baseUrl}/flow?tenantId=${encodeURIComponent(ctx.tenantId)}`,
    {
      method: 'GET',
      headers: { 'Content-Type': 'application/json' },
    }
  )

  if (!response.data) {
    throw ctx.createError('Failed to get flow state', 500, true)
  }

  return response.data
}

/**
 * Navigate to next/previous step
 */
export async function navigateFlow(
  ctx: FetchContext,
  direction: 'next' | 'previous'
): Promise<{ stepId: string; phase: 1 | 2 }> {
  const response = await ctx.fetchWithRetry<APIResponse<{
    stepId: string
    phase: 1 | 2
  }>>(
    `${ctx.baseUrl}/flow`,
    {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        tenantId: ctx.tenantId,
        direction,
      }),
    }
  )

  if (!response.data) {
    throw ctx.createError('Failed to navigate flow', 500, true)
  }

  return response.data
}

// ---------------------------------------------------------------------------
// Modules
// ---------------------------------------------------------------------------

/**
 * Get available compliance modules from backend
 */
export async function getModules(
  ctx: FetchContext,
  filters?: {
    serviceType?: string
    criticality?: string
    processesPii?: boolean
    aiComponents?: boolean
  }
): Promise<{ modules: unknown[]; total: number }> {
  const params = new URLSearchParams()
  if (filters?.serviceType) params.set('service_type', filters.serviceType)
  if (filters?.criticality) params.set('criticality', filters.criticality)
  if (filters?.processesPii !== undefined) params.set('processes_pii', String(filters.processesPii))
  if (filters?.aiComponents !== undefined) params.set('ai_components', String(filters.aiComponents))

  const queryString = params.toString()
  const url = `${ctx.baseUrl}/modules${queryString ? `?${queryString}` : ''}`

  const response = await ctx.fetchWithRetry<{ modules: unknown[]; total: number }>(
    url,
    {
      method: 'GET',
      headers: { 'Content-Type': 'application/json' },
    }
  )

  return response
}

// ---------------------------------------------------------------------------
// UCCA (Use Case Compliance Assessment)
// ---------------------------------------------------------------------------

/**
 * Assess a use case
 */
export async function assessUseCase(
  ctx: FetchContext,
  intake: unknown
): Promise<unknown> {
  const response = await ctx.fetchWithRetry<APIResponse<unknown>>(
    `${ctx.baseUrl}/ucca/assess`,
    {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'X-Tenant-ID': ctx.tenantId,
      },
      body: JSON.stringify(intake),
    }
  )
  return response
}

/**
 * Get all assessments
 */
export async function getAssessments(ctx: FetchContext): Promise<unknown[]> {
  const response = await ctx.fetchWithRetry<APIResponse<unknown[]>>(
    `${ctx.baseUrl}/ucca/assessments?tenantId=${encodeURIComponent(ctx.tenantId)}`,
    {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
        'X-Tenant-ID': ctx.tenantId,
      },
    }
  )
  return response.data || []
}

/**
 * Get a single assessment
 */
export async function getAssessment(
  ctx: FetchContext,
  id: string
): Promise<unknown> {
  const response = await ctx.fetchWithRetry<APIResponse<unknown>>(
    `${ctx.baseUrl}/ucca/assessments/${id}`,
    {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
        'X-Tenant-ID': ctx.tenantId,
      },
    }
  )
  return response.data
}

/**
 * Delete an assessment
 */
export async function deleteAssessment(
  ctx: FetchContext,
  id: string
): Promise<void> {
  await ctx.fetchWithRetry<APIResponse<void>>(
    `${ctx.baseUrl}/ucca/assessments/${id}`,
    {
      method: 'DELETE',
      headers: {
        'Content-Type': 'application/json',
        'X-Tenant-ID': ctx.tenantId,
      },
    }
  )
}

// ---------------------------------------------------------------------------
// Document Import & Screening
// ---------------------------------------------------------------------------

/**
 * Analyze an uploaded document
 */
export async function analyzeDocument(
  ctx: FetchContext,
  formData: FormData
): Promise<unknown> {
  const response = await ctx.fetchWithRetry<APIResponse<unknown>>(
    `${ctx.baseUrl}/import/analyze`,
    {
      method: 'POST',
      headers: { 'X-Tenant-ID': ctx.tenantId },
      body: formData,
    }
  )
  return response.data
}

/**
 * Scan a dependency file (package-lock.json, requirements.txt, etc.)
 */
export async function scanDependencies(
  ctx: FetchContext,
  formData: FormData
): Promise<unknown> {
  const response = await ctx.fetchWithRetry<APIResponse<unknown>>(
    `${ctx.baseUrl}/screening/scan`,
    {
      method: 'POST',
      headers: { 'X-Tenant-ID': ctx.tenantId },
      body: formData,
    }
  )
  return response.data
}

// ---------------------------------------------------------------------------
// Health
// ---------------------------------------------------------------------------

/**
 * Health check
 */
export async function healthCheck(ctx: FetchContext): Promise<boolean> {
  try {
    const response = await ctx.fetchWithTimeout(
      `${ctx.baseUrl}/health`,
      { method: 'GET' },
      `health-${Date.now()}`
    )
    return response.ok
  } catch {
    return false
  }
}