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import { create } from 'zustand'
import type { Message } from '../types'

interface InterviewState {
  sessionId: string | null
  topicId: string | null
  messages: Message[]
  turnCount: number
  maxTurns: number
  status: 'idle' | 'loading' | 'waiting' | 'finished'
}

interface InterviewActions {
  startSession: (sessionId: string, topicId: string, firstMessage: string) => void
  addMessage: (message: Message) => void
  setTurnCount: (count: number) => void
  setStatus: (status: InterviewState['status']) => void
  reset: () => void
}

const initialState: InterviewState = {
  sessionId: null,
  topicId: null,
  messages: [],
  turnCount: 0,
  maxTurns: 5,
  status: 'idle',
}

export const useInterviewStore = create<InterviewState & InterviewActions>((set) => ({
  ...initialState,

  startSession: (sessionId, topicId, firstMessage) =>
    set({
      sessionId,
      topicId,
      messages: [{ role: 'ai', content: firstMessage }],
      turnCount: 0,
      status: 'waiting',
    }),

  addMessage: (message) =>
    set((state) => ({ messages: [...state.messages, message] })),

  setTurnCount: (count) => set({ turnCount: count }),

  setStatus: (status) => set({ status }),

  reset: () => set(initialState),
}))