import { createAsyncThunk, createSlice, type PayloadAction } from '@reduxjs/toolkit'
import {
  cameraAuditLogListSchema,
  cameraCreateRequestSchema,
  cameraDeviceUpdateSchema,
  cameraListResponseSchema,
  cameraReturnResponseSchema,
  cameraSimulateIngestResponseSchema,
  type CameraAuditLog,
  type CameraListItem,
} from 'contracts'
import { ingestApi } from '../api/client'
import { toErrorMessage } from './greeting-slice'
import type { RootState } from './index'

export type CameraFormState = {
  borrower: string
  purpose: string
  dueDate: string
}

export type CameraEditFormState = {
  name: string
  location: string
  model: string
  notes: string
  isActive: boolean
}

export type CameraPageState = {
  cameras: CameraListItem[]
  loading: boolean
  error: string | null
  message: string | null
  isCreating: boolean
  simulatingCameraId: string | null
  createModalOpen: boolean
  lendModalCameraId: string | null
  editModalCameraId: string | null
  auditModalCameraId: string | null
  auditLogs: CameraAuditLog[]
  isAuditLoading: boolean
  isLending: boolean
  isUpdating: boolean
  isReturning: string | null
  isTogglingActivation: string | null
  lendForm: CameraFormState
  createForm: CameraEditFormState & { cameraId: string }
  editForm: CameraEditFormState
}

const initialState: CameraPageState = {
  cameras: [],
  loading: false,
  error: null,
  message: null,
  isCreating: false,
  simulatingCameraId: null,
  createModalOpen: false,
  lendModalCameraId: null,
  editModalCameraId: null,
  auditModalCameraId: null,
  auditLogs: [],
  isAuditLoading: false,
  isLending: false,
  isUpdating: false,
  isReturning: null,
  isTogglingActivation: null,
  lendForm: {
    borrower: '',
    purpose: '',
    dueDate: '',
  },
  createForm: {
    cameraId: '',
    name: '',
    location: '',
    model: '',
    notes: '',
    isActive: true,
  },
  editForm: {
    name: '',
    location: '',
    model: '',
    notes: '',
    isActive: true,
  },
}

export const fetchCameras = createAsyncThunk<CameraListItem[], void, { rejectValue: string }>(
  'cameraPage/fetchCameras',
  async (_, { rejectWithValue }) => {
    try {
      const response = await ingestApi.get('/cameras')
      const parsed = cameraListResponseSchema.parse(response.data)
      return parsed.items
    } catch (error) {
      return rejectWithValue(toErrorMessage(error))
    }
  },
)

export const createCamera = createAsyncThunk<string, void, { state: RootState; rejectValue: string }>(
  'cameraPage/createCamera',
  async (_, { dispatch, getState, rejectWithValue }) => {
    const { createForm } = getState().cameraPage
    try {
      const body = cameraCreateRequestSchema.parse({
        cameraId: createForm.cameraId,
        name: createForm.name,
        location: createForm.location,
        model: createForm.model ? createForm.model : null,
        notes: createForm.notes ? createForm.notes : null,
        isActive: createForm.isActive,
      })

      await ingestApi.post('/cameras', body)
      await dispatch(fetchCameras()).unwrap()
      return body.cameraId
    } catch (error) {
      return rejectWithValue(toErrorMessage(error))
    }
  },
)

export const simulateCameraIngest = createAsyncThunk<string, string, { rejectValue: string }>(
  'cameraPage/simulateIngest',
  async (cameraId, { dispatch, rejectWithValue }) => {
    try {
      const response = await ingestApi.post(`/cameras/${cameraId}/simulate-ingest`, {})
      cameraSimulateIngestResponseSchema.parse(response.data)
      await dispatch(fetchCameras()).unwrap()
      return cameraId
    } catch (error) {
      return rejectWithValue(toErrorMessage(error))
    }
  },
)

export const submitCameraLend = createAsyncThunk<string, string, { state: RootState; rejectValue: string }>(
  'cameraPage/submitLend',
  async (cameraId, { dispatch, getState, rejectWithValue }) => {
    const { lendForm } = getState().cameraPage
    if (!lendForm.borrower || !lendForm.dueDate) {
      return rejectWithValue('Borrower and due date are required')
    }

    try {
      await ingestApi.post(`/cameras/${cameraId}/lend`, {
        borrower: lendForm.borrower,
        dueDate: new Date(lendForm.dueDate).toISOString(),
        purpose: lendForm.purpose || undefined,
      })
      await dispatch(fetchCameras()).unwrap()
      return cameraId
    } catch (error) {
      return rejectWithValue(toErrorMessage(error))
    }
  },
)

export const returnCamera = createAsyncThunk<string, string, { rejectValue: string }>(
  'cameraPage/returnCamera',
  async (cameraId, { dispatch, rejectWithValue }) => {
    try {
      const response = await ingestApi.post(`/cameras/${cameraId}/return`, {})
      cameraReturnResponseSchema.parse(response.data)
      await dispatch(fetchCameras()).unwrap()
      return cameraId
    } catch (error) {
      return rejectWithValue(toErrorMessage(error))
    }
  },
)

export const saveCameraUpdates = createAsyncThunk<
  string,
  string,
  { state: RootState; rejectValue: string }
>('cameraPage/saveUpdates', async (cameraId, { dispatch, getState, rejectWithValue }) => {
  const { editForm } = getState().cameraPage

  try {
    const patch = cameraDeviceUpdateSchema.parse({
      name: editForm.name,
      location: editForm.location,
      model: editForm.model ? editForm.model : null,
      notes: editForm.notes ? editForm.notes : null,
      isActive: editForm.isActive,
    })
    await ingestApi.patch(`/cameras/${cameraId}`, patch)
    await dispatch(fetchCameras()).unwrap()
    return cameraId
  } catch (error) {
    return rejectWithValue(toErrorMessage(error))
  }
})

export const toggleCameraActivation = createAsyncThunk<
  { cameraId: string; nextActive: boolean },
  { cameraId: string; isActive: boolean },
  { rejectValue: string }
>('cameraPage/toggleActivation', async ({ cameraId, isActive }, { dispatch, rejectWithValue }) => {
  try {
    const nextActive = !isActive
    await ingestApi.patch(`/cameras/${cameraId}`, { isActive: nextActive })
    await dispatch(fetchCameras()).unwrap()
    return { cameraId, nextActive }
  } catch (error) {
    return rejectWithValue(toErrorMessage(error))
  }
})

export const fetchCameraAudit = createAsyncThunk<
  { cameraId: string; items: CameraAuditLog[] },
  string,
  { rejectValue: string }
>('cameraPage/fetchAudit', async (cameraId, { rejectWithValue }) => {
  try {
    const response = await ingestApi.get(`/cameras/${cameraId}/audit`, { params: { limit: 50 } })
    const parsed = cameraAuditLogListSchema.parse(response.data)
    return { cameraId, items: parsed.items }
  } catch (error) {
    return rejectWithValue(toErrorMessage(error))
  }
})

const cameraPageSlice = createSlice({
  name: 'cameraPage',
  initialState,
  reducers: {
    clearBanner(state) {
      state.error = null
      state.message = null
    },
    openLendModal(state, action: PayloadAction<string>) {
      state.lendModalCameraId = action.payload
      state.lendForm = { borrower: '', purpose: '', dueDate: '' }
      state.error = null
      state.message = null
    },
    openCreateModal(state) {
      state.createModalOpen = true
      state.createForm = {
        cameraId: '',
        name: '',
        location: '',
        model: '',
        notes: '',
        isActive: true,
      }
      state.error = null
      state.message = null
    },
    closeCreateModal(state) {
      state.createModalOpen = false
    },
    setCreateCameraId(state, action: PayloadAction<string>) {
      state.createForm.cameraId = action.payload
    },
    setCreateName(state, action: PayloadAction<string>) {
      state.createForm.name = action.payload
    },
    setCreateLocation(state, action: PayloadAction<string>) {
      state.createForm.location = action.payload
    },
    setCreateModel(state, action: PayloadAction<string>) {
      state.createForm.model = action.payload
    },
    setCreateNotes(state, action: PayloadAction<string>) {
      state.createForm.notes = action.payload
    },
    setCreateIsActive(state, action: PayloadAction<boolean>) {
      state.createForm.isActive = action.payload
    },
    closeLendModal(state) {
      state.lendModalCameraId = null
    },
    setLendBorrower(state, action: PayloadAction<string>) {
      state.lendForm.borrower = action.payload
    },
    setLendPurpose(state, action: PayloadAction<string>) {
      state.lendForm.purpose = action.payload
    },
    setLendDueDate(state, action: PayloadAction<string>) {
      state.lendForm.dueDate = action.payload
    },
    openEditModal(state, action: PayloadAction<CameraListItem>) {
      const camera = action.payload
      state.editModalCameraId = camera.cameraId
      state.editForm = {
        name: camera.name,
        location: camera.location,
        model: camera.model ?? '',
        notes: camera.notes ?? '',
        isActive: camera.isActive,
      }
      state.error = null
      state.message = null
    },
    closeEditModal(state) {
      state.editModalCameraId = null
    },
    setEditName(state, action: PayloadAction<string>) {
      state.editForm.name = action.payload
    },
    setEditLocation(state, action: PayloadAction<string>) {
      state.editForm.location = action.payload
    },
    setEditModel(state, action: PayloadAction<string>) {
      state.editForm.model = action.payload
    },
    setEditNotes(state, action: PayloadAction<string>) {
      state.editForm.notes = action.payload
    },
    setEditIsActive(state, action: PayloadAction<boolean>) {
      state.editForm.isActive = action.payload
    },
    closeAuditModal(state) {
      state.auditModalCameraId = null
      state.auditLogs = []
    },
  },
  extraReducers: (builder) => {
    builder
      .addCase(fetchCameras.pending, (state) => {
        state.loading = true
        state.error = null
      })
      .addCase(fetchCameras.fulfilled, (state, action) => {
        state.loading = false
        state.cameras = action.payload
      })
      .addCase(fetchCameras.rejected, (state, action) => {
        state.loading = false
        state.error = action.payload ?? action.error.message ?? 'Failed to fetch camera list'
      })
      .addCase(createCamera.pending, (state) => {
        state.isCreating = true
        state.error = null
        state.message = null
      })
      .addCase(createCamera.fulfilled, (state, action) => {
        state.isCreating = false
        state.createModalOpen = false
        state.message = `Camera ${action.payload} created successfully`
      })
      .addCase(createCamera.rejected, (state, action) => {
        state.isCreating = false
        state.error = action.payload ?? action.error.message ?? 'Failed to create camera'
      })
      .addCase(simulateCameraIngest.pending, (state, action) => {
        state.simulatingCameraId = action.meta.arg
        state.error = null
        state.message = null
      })
      .addCase(simulateCameraIngest.fulfilled, (state, action) => {
        state.simulatingCameraId = null
        state.message = `Simulated ingest for ${action.payload}`
      })
      .addCase(simulateCameraIngest.rejected, (state, action) => {
        state.simulatingCameraId = null
        state.error = action.payload ?? action.error.message ?? 'Failed to simulate camera ingest'
      })
      .addCase(submitCameraLend.pending, (state) => {
        state.isLending = true
        state.error = null
        state.message = null
      })
      .addCase(submitCameraLend.fulfilled, (state, action) => {
        state.isLending = false
        state.lendModalCameraId = null
        state.lendForm = { borrower: '', purpose: '', dueDate: '' }
        state.message = `Camera ${action.payload} lent successfully`
      })
      .addCase(submitCameraLend.rejected, (state, action) => {
        state.isLending = false
        state.error = action.payload ?? action.error.message ?? 'Failed to lend camera'
      })
      .addCase(returnCamera.pending, (state, action) => {
        state.isReturning = action.meta.arg
        state.error = null
        state.message = null
      })
      .addCase(returnCamera.fulfilled, (state, action) => {
        state.isReturning = null
        state.message = `Camera ${action.payload} returned successfully`
      })
      .addCase(returnCamera.rejected, (state, action) => {
        state.isReturning = null
        state.error = action.payload ?? action.error.message ?? 'Failed to return camera'
      })
      .addCase(saveCameraUpdates.pending, (state) => {
        state.isUpdating = true
        state.error = null
        state.message = null
      })
      .addCase(saveCameraUpdates.fulfilled, (state, action) => {
        state.isUpdating = false
        state.editModalCameraId = null
        state.message = `Camera ${action.payload} updated successfully`
      })
      .addCase(saveCameraUpdates.rejected, (state, action) => {
        state.isUpdating = false
        state.error = action.payload ?? action.error.message ?? 'Failed to update camera'
      })
      .addCase(toggleCameraActivation.pending, (state, action) => {
        state.isTogglingActivation = action.meta.arg.cameraId
        state.error = null
        state.message = null
      })
      .addCase(toggleCameraActivation.fulfilled, (state, action) => {
        state.isTogglingActivation = null
        state.message = action.payload.nextActive
          ? `Camera ${action.payload.cameraId} activated`
          : `Camera ${action.payload.cameraId} deactivated`
      })
      .addCase(toggleCameraActivation.rejected, (state, action) => {
        state.isTogglingActivation = null
        state.error = action.payload ?? action.error.message ?? 'Failed to update camera activation status'
      })
      .addCase(fetchCameraAudit.pending, (state, action) => {
        state.auditModalCameraId = action.meta.arg
        state.auditLogs = []
        state.isAuditLoading = true
        state.error = null
      })
      .addCase(fetchCameraAudit.fulfilled, (state, action) => {
        state.isAuditLoading = false
        state.auditModalCameraId = action.payload.cameraId
        state.auditLogs = action.payload.items
      })
      .addCase(fetchCameraAudit.rejected, (state, action) => {
        state.isAuditLoading = false
        state.error = action.payload ?? action.error.message ?? 'Failed to load audit logs'
      })
  },
})

export const {
  clearBanner,
  openCreateModal,
  closeCreateModal,
  setCreateCameraId,
  setCreateName,
  setCreateLocation,
  setCreateModel,
  setCreateNotes,
  setCreateIsActive,
  openLendModal,
  closeLendModal,
  setLendBorrower,
  setLendPurpose,
  setLendDueDate,
  openEditModal,
  closeEditModal,
  setEditName,
  setEditLocation,
  setEditModel,
  setEditNotes,
  setEditIsActive,
  closeAuditModal,
} = cameraPageSlice.actions

export default cameraPageSlice.reducer