import { defineStore } from 'pinia'
import { ref } from 'vue'
import { useApi } from '../composables/useApi.js'

export const useCleanupStore = defineStore('cleanup', () => {
  const api = useApi()

  // Defaults sourced from ImportSettings on mount. Cards pre-fill from
  // these so the common case ("apply current import filters
  // retroactively") is one click; operator can override per-audit.
  const defaults = ref({
    min_width: 0,
    min_height: 0,
    transparency_threshold: 0.9,
    single_color_threshold: 0.95,
    single_color_tolerance: 30,
  })

  const recentRuns = ref([])

  async function loadDefaults() {
    const s = await api.get('/api/settings/import')
    defaults.value = {
      min_width: s.min_width ?? 0,
      min_height: s.min_height ?? 0,
      transparency_threshold: s.transparency_threshold ?? 0.9,
      single_color_threshold: s.single_color_threshold ?? 0.95,
      single_color_tolerance: s.single_color_tolerance ?? 30,
    }
  }

  async function previewMinDim(min_width, min_height) {
    return await api.post('/api/cleanup/min-dimension/preview', {
      body: { min_width, min_height },
    })
  }

  async function deleteMinDim(min_width, min_height, confirm) {
    return await api.post('/api/cleanup/min-dimension/delete', {
      body: { min_width, min_height, confirm },
    })
  }

  async function startAudit(rule, params) {
    return await api.post('/api/cleanup/audit', { body: { rule, params } })
  }

  async function getAudit(id) {
    return await api.get(`/api/cleanup/audit/${id}`)
  }

  async function loadHistory(limit = 20) {
    const body = await api.get(`/api/cleanup/audit?limit=${limit}`)
    recentRuns.value = body.runs
    return body.runs
  }

  // The most recent audit run for a given rule, or null. Cards call this on
  // mount to reconnect to a scan that's still running (or to show the last
  // completed result) after the user navigates away and back.
  async function latestAuditForRule(rule) {
    const body = await api.get('/api/cleanup/audit', { params: { rule, limit: 1 } })
    return (body.runs && body.runs[0]) || null
  }

  async function applyAudit(id, confirm) {
    return await api.post(`/api/cleanup/audit/${id}/apply`, { body: { confirm } })
  }

  async function cancelAudit(id) {
    return await api.post(`/api/cleanup/audit/${id}/cancel`)
  }

  // --- placement reconciler (milestone #421) --------------------------------
  //
  // Runs are server-side rows, so the DATABASE is the durable state here —
  // no localStorage resurfacing (useMaintenanceTask) is needed. Reload the
  // page, open it on another machine, and the run and its status are simply
  // there. That also means a plan survives being walked away from for a day.

  const placementRuns = ref([])
  const layout = ref(null)

  // The survey: which rows sit outside their artist's directory. check_disk
  // additionally stats every destination (collisions, missing sources) and
  // costs one stat per misplaced row over NFS, so it is opt-in.
  async function loadLayout(checkDisk = false) {
    layout.value = await api.get('/api/cleanup/layout', {
      params: checkDisk ? { check_disk: 1 } : {},
    })
    return layout.value
  }

  // id -> name, so a run row can say "Conto" instead of "#47". The runs
  // endpoint carries artist_id alone: the name belongs to the artist, and
  // denormalising it into every run would go stale the moment one is renamed.
  async function loadArtistNames() {
    const rows = await api.get('/api/artists/names')
    return Object.fromEntries((rows || []).map(a => [a.id, a.name]))
  }

  async function loadPlacementRuns(limit = 25) {
    const body = await api.get('/api/cleanup/placement/runs', { params: { limit } })
    placementRuns.value = body.runs || []
    return placementRuns.value
  }

  // Detail carries `moves` — the plan the operator reads before agreeing.
  async function getPlacementRun(id) {
    return await api.get(`/api/cleanup/placement/runs/${id}`)
  }

  async function planPlacement(artistId = null) {
    return await api.post('/api/cleanup/placement/plan', {
      body: artistId === null ? {} : { artist_id: artistId },
    })
  }

  async function applyPlacement(id) {
    return await api.post(`/api/cleanup/placement/runs/${id}/apply`)
  }

  async function revertPlacement(id) {
    return await api.post(`/api/cleanup/placement/runs/${id}/revert`)
  }

  return {
    defaults, recentRuns,
    loadDefaults,
    previewMinDim, deleteMinDim,
    startAudit, getAudit, loadHistory, latestAuditForRule, applyAudit, cancelAudit,
    placementRuns, layout,
    loadLayout, loadArtistNames, loadPlacementRuns, getPlacementRun,
    planPlacement, applyPlacement, revertPlacement,
  }
})