import apiClient from './client'
import type { Session, SessionCreate, SessionUpdate, SessionExport, SaveAsTreeRequest, SaveAsTreeResponse, SessionComplete, RedactionSummary, SessionShareCreate, SessionShare, SharedSessionView, PrepareSessionRequest } from '@/types'

export interface SessionListParams {
  page?: number
  size?: number
  tree_id?: string
  batch_id?: string
  completed?: boolean
  assigned_to_id?: string
  status?: 'prepared' | 'active' | 'completed'
  ticket_number?: string
  client_name?: string
  tree_name?: string
  started_after?: string  // ISO datetime string
  started_before?: string
  completed_after?: string
  completed_before?: string
}

export const sessionsApi = {
  async list(params?: SessionListParams): Promise<Session[]> {
    const response = await apiClient.get<Session[]>('/sessions', { params })
    return response.data
  },

  async get(id: string): Promise<Session> {
    const response = await apiClient.get<Session>(`/sessions/${id}`)
    return response.data
  },

  async create(data: SessionCreate): Promise<Session> {
    const response = await apiClient.post<Session>('/sessions', data)
    window.dispatchEvent(new Event('session-changed'))
    return response.data
  },

  async update(id: string, data: SessionUpdate): Promise<Session> {
    const response = await apiClient.put<Session>(`/sessions/${id}`, data)
    return response.data
  },

  async complete(id: string, data: SessionComplete): Promise<Session> {
    const response = await apiClient.post<Session>(`/sessions/${id}/complete`, data)
    window.dispatchEvent(new Event('session-changed'))
    return response.data
  },

  async export(id: string, options: SessionExport): Promise<string> {
    const response = await apiClient.post<string>(`/sessions/${id}/export`, options)
    return response.data
  },

  async exportWithMeta(
    id: string,
    options: SessionExport
  ): Promise<{
    content: string
    redactionMode: 'none' | 'mask'
    redactionSummary: RedactionSummary | null
  }> {
    const response = await apiClient.post<string>(`/sessions/${id}/export`, options)
    const redactionMode = (response.headers['x-redaction-mode'] as 'none' | 'mask') || 'none'
    let redactionSummary: RedactionSummary | null = null
    const summaryHeader = response.headers['x-redaction-summary']
    if (summaryHeader) {
      try {
        redactionSummary = JSON.parse(summaryHeader)
      } catch {
        // Ignore malformed header
      }
    }
    return { content: response.data, redactionMode, redactionSummary }
  },

  async prepare(data: PrepareSessionRequest): Promise<Session> {
    const response = await apiClient.post<Session>('/sessions/prepare', data)
    return response.data
  },

  async updateVariables(id: string, variables: Record<string, string>): Promise<Session> {
    const response = await apiClient.patch<Session>(`/sessions/${id}/variables`, { variables })
    return response.data
  },

  async updateScratchpad(id: string, content: string): Promise<Session> {
    const response = await apiClient.patch<Session>(`/sessions/${id}/scratchpad`, { scratchpad: content })
    return response.data
  },

  async saveAsTree(id: string, data: SaveAsTreeRequest): Promise<SaveAsTreeResponse> {
    const response = await apiClient.post<SaveAsTreeResponse>(`/sessions/${id}/save-as-tree`, data)
    return response.data
  },

  // Session Sharing
  async createShare(sessionId: string, data: SessionShareCreate): Promise<SessionShare> {
    const response = await apiClient.post<SessionShare>(`/sessions/${sessionId}/shares`, data)
    return response.data
  },

  async listMyShares(): Promise<SessionShare[]> {
    const response = await apiClient.get<SessionShare[]>('/shares/my-shares')
    return response.data
  },

  async revokeShare(shareId: string): Promise<void> {
    await apiClient.delete(`/shares/${shareId}`)
  },

  async getSharedSession(shareToken: string): Promise<SharedSessionView> {
    const response = await apiClient.get<SharedSessionView>(`/share/${shareToken}`)
    return response.data
  },
}

export default sessionsApi