/**
 * 📦 Admin Packages Store
 *
 * Pinia store for managing SubscriptionTier packages.
 * Mirrors the backend admin_packages.py API endpoints.
 *
 * Endpoints:
 *   GET    /admin/packages/       — List all packages
 *   POST   /admin/packages/       — Create a new package
 *   PATCH  /admin/packages/{id}   — Update a package
 *   DELETE /admin/packages/{id}   — Soft-delete (deactivate) a package
 */

import { defineStore } from 'pinia'
import { ref } from 'vue'
import api from '../api/axios'

// ── TypeScript Interfaces (mirroring backend Pydantic schemas) ───────────────

export interface PricingModel {
  monthly_price: number
  yearly_price: number
  currency: string
  credit_price?: number | null
}

export interface PricingZoneModel {
  monthly_price: number
  yearly_price: number
  currency: string
  credit_price?: number | null
}

export interface MarketingModel {
  subtitle?: string | null
  badge?: string | null
  highlight_color?: string | null
}

export interface AllowancesModel {
  max_vehicles: number
  max_garages: number
  monthly_free_credits: number
}

export interface LifecycleModel {
  is_public: boolean
  available_until?: string | null
}

export interface AffiliateModel {
  commission_rate_percent: number
  referral_bonus_credits: number
}

export interface SubscriptionRulesModel {
  type: 'private' | 'corporate'
  display_name?: string | null
  pricing: PricingModel
  pricing_zones?: Record<string, PricingZoneModel> | null
  allowances: AllowancesModel
  entitlements: string[]
  affiliate: AffiliateModel
  lifecycle?: LifecycleModel | null
  marketing?: MarketingModel | null
}

export interface SubscriptionTierItem {
  id: number
  name: string
  rules: SubscriptionRulesModel
  is_custom: boolean
}

export interface SubscriptionTierListResponse {
  total: number
  tiers: SubscriptionTierItem[]
}

export interface SubscriptionTierCreatePayload {
  name: string
  rules: SubscriptionRulesModel
  is_custom?: boolean
}

export interface SubscriptionTierUpdatePayload {
  name?: string
  rules?: SubscriptionRulesModel
  is_custom?: boolean
}

export interface DeletePackageResponse {
  status: string
  message: string
  tier_id: number
  is_public: boolean
}

// ── Available Entitlements (service codes) ───────────────────────────────────

export const AVAILABLE_ENTITLEMENTS: string[] = [
  'SRV_DATA_EXPORT',
  'SRV_AI_UPLOAD',
  'SRV_ACCOUNTING_SYNC',
  'SRV_API_ACCESS',
  'SRV_MULTI_USER',
  'SRV_PRIORITY_SUPPORT',
  'SRV_ADVANCED_ANALYTICS',
  'SRV_CUSTOM_REPORTS',
  'SRV_GARAGE_SHARING',
  'SRV_SERVICE_HISTORY',
  'SRV_FUEL_MANAGEMENT',
  'SRV_MAINTENANCE_ALERTS',
  'SRV_ODOMETER_TRACKING',
  'SRV_DOCUMENT_STORAGE',
  'SRV_INSURANCE_INTEGRATION',
]

// ── Store ────────────────────────────────────────────────────────────────────

export const useAdminPackagesStore = defineStore('adminPackages', () => {
  // ── State ────────────────────────────────────────────────────────────────
  const tiers = ref<SubscriptionTierItem[]>([])
  const total = ref(0)
  const isLoading = ref(false)
  const error = ref<string | null>(null)

  // ── Actions ──────────────────────────────────────────────────────────────

  /**
   * Fetch all subscription packages from GET /admin/packages/.
   */
  async function fetchPackages(params: {
    skip?: number
    limit?: number
    include_hidden?: boolean
    type_filter?: string
    date_from?: string
    date_until?: string
  } = {}) {
    isLoading.value = true
    error.value = null

    try {
      const queryParams: Record<string, any> = {
        skip: params.skip ?? 0,
        limit: params.limit ?? 100,
      }
      if (params.include_hidden) {
        queryParams.include_hidden = true
      }
      if (params.type_filter) {
        queryParams.type_filter = params.type_filter
      }
      if (params.date_from) {
        queryParams.date_from = params.date_from
      }
      if (params.date_until) {
        queryParams.date_until = params.date_until
      }

      const res = await api.get('/admin/packages', { params: queryParams })
      const data = res.data as SubscriptionTierListResponse
      console.log('[AdminPackages] API response:', data)
      console.log('[AdminPackages] tiers array:', data.tiers)
      console.log('[AdminPackages] tiers length:', data.tiers?.length)
      tiers.value = data.tiers
      total.value = data.total
      return data
    } catch (err: any) {
      error.value = err.response?.data?.detail || 'Failed to fetch packages'
      throw err
    } finally {
      isLoading.value = false
    }
  }

  /**
   * Create a new subscription package via POST /admin/packages/.
   * NOTE: Do NOT send the `id` field — PostgreSQL auto-increments it.
   */
  async function createPackage(payload: SubscriptionTierCreatePayload): Promise<SubscriptionTierItem> {
    isLoading.value = true
    error.value = null

    try {
      const res = await api.post('/admin/packages', payload)
      const created = res.data as SubscriptionTierItem
      // Refresh the list
      await fetchPackages({ include_hidden: true })
      return created
    } catch (err: any) {
      error.value = err.response?.data?.detail || 'Failed to create package'
      throw err
    } finally {
      isLoading.value = false
    }
  }

  /**
   * Update an existing package via PATCH /admin/packages/{id}.
   */
  async function updatePackage(
    tierId: number,
    payload: SubscriptionTierUpdatePayload,
  ): Promise<SubscriptionTierItem> {
    isLoading.value = true
    error.value = null

    try {
      const res = await api.patch(`/admin/packages/${tierId}`, payload)
      const updated = res.data as SubscriptionTierItem
      // Refresh the list
      await fetchPackages({ include_hidden: true })
      return updated
    } catch (err: any) {
      error.value = err.response?.data?.detail || 'Failed to update package'
      throw err
    } finally {
      isLoading.value = false
    }
  }

  /**
   * Soft-delete (deactivate) a package via DELETE /admin/packages/{id}.
   * Sets lifecycle.is_public = false.
   */
  async function deletePackage(tierId: number): Promise<DeletePackageResponse> {
    isLoading.value = true
    error.value = null

    try {
      const res = await api.delete(`/admin/packages/${tierId}`)
      const result = res.data as DeletePackageResponse
      // Refresh the list
      await fetchPackages({ include_hidden: true })
      return result
    } catch (err: any) {
      error.value = err.response?.data?.detail || 'Failed to delete package'
      throw err
    } finally {
      isLoading.value = false
    }
  }

  return {
    // State
    tiers,
    total,
    isLoading,
    error,

    // Actions
    fetchPackages,
    createPackage,
    updatePackage,
    deletePackage,
  }
})