/**
 * AP2.3b — Operating Profile Resolver (API-first, methodUiDefaults als Fallback).
 */
import { PLAN_OUTLINE_NODES } from '../plan/planOutlineNodes.js'
import { WORK_NAV_ITEMS } from '../config/workNav.js'
import {
  resolveMethodUiDefaults,
  resolveActiveProcessStepKey as resolveActiveProcessStepKeyFallback,
} from '../config/methodUiDefaults.js'

/**
 * @typedef {import('../config/methodUiDefaults.js').ProcessStep} ProcessStep
 * @typedef {import('../config/methodUiDefaults.js').MethodUiDefaults} MethodUiDefaults
 * @typedef {{
 *   initiative_id?: string,
 *   archetype_key?: string | null,
 *   method_key?: string | null,
 *   method_profile_key?: string | null,
 *   ui_profile?: Partial<MethodUiDefaults> | null,
 *   data_slices?: string[],
 *   method_capabilities?: object,
 * }} OperatingContextResponse
 * @typedef {{
 *   archetypeKey?: string | null,
 *   methodKey?: string | null,
 *   hasActiveSprint?: boolean,
 *   operatingContext?: OperatingContextResponse | null,
 * }} ResolveOperatingProfileInput
 */

const EMPTY_PROFILE = {
  processSteps: [],
  planDefaultRoute: '/plan/profile',
  workDefaultRoute: '/work/today',
  controlDefaultRoute: '/control/status',
  planOutlineKeys: null,
  workNavKeys: null,
}

/**
 * @param {OperatingContextResponse | null | undefined} context
 * @param {{ hasActiveSprint?: boolean }} [options]
 * @returns {MethodUiDefaults & { dataSlices: string[] }}
 */
export function resolveOperatingProfile(context, options = {}) {
  if (context?.ui_profile) {
    const profile = context.ui_profile
    let workDefaultRoute = profile.workDefaultRoute || EMPTY_PROFILE.workDefaultRoute
    if (
      context.archetype_key === 'initiative.product' &&
      !options.hasActiveSprint
    ) {
      workDefaultRoute = '/work/today'
    }
    return {
      processSteps: profile.processSteps || [],
      planDefaultRoute: profile.planDefaultRoute || EMPTY_PROFILE.planDefaultRoute,
      workDefaultRoute,
      controlDefaultRoute:
        profile.controlDefaultRoute || EMPTY_PROFILE.controlDefaultRoute,
      planOutlineKeys: profile.planOutlineKeys ?? null,
      workNavKeys: profile.workNavKeys ?? null,
      dataSlices: context.data_slices || profile.dataSlices || [],
    }
  }

  const fallback = resolveMethodUiDefaults({
    archetypeKey: context?.archetype_key || null,
    methodKey: context?.method_key || null,
    hasActiveSprint: options.hasActiveSprint,
  })
  return {
    ...fallback,
    dataSlices: context?.data_slices || [],
  }
}

/**
 * @param {ResolveOperatingProfileInput} input
 * @returns {MethodUiDefaults & { dataSlices: string[] }}
 */
export function resolveOperatingProfileFromInput(input = {}) {
  if (input.operatingContext) {
    return resolveOperatingProfile(input.operatingContext, {
      hasActiveSprint: input.hasActiveSprint,
    })
  }
  const fallback = resolveMethodUiDefaults({
    archetypeKey: input.archetypeKey || null,
    methodKey: input.methodKey || null,
    hasActiveSprint: input.hasActiveSprint,
  })
  return { ...fallback, dataSlices: [] }
}

/**
 * @param {ResolveOperatingProfileInput} input
 * @returns {typeof PLAN_OUTLINE_NODES}
 */
export function resolvePlanOutlineNodesFromProfile(input = {}) {
  const { planOutlineKeys } = resolveOperatingProfileFromInput(input)
  if (!planOutlineKeys) return PLAN_OUTLINE_NODES
  const allowed = new Set(planOutlineKeys)
  return PLAN_OUTLINE_NODES.filter((node) => allowed.has(node.key))
}

/**
 * @param {ResolveOperatingProfileInput} input
 * @returns {typeof WORK_NAV_ITEMS}
 */
export function resolveWorkNavItemsFromProfile(input = {}) {
  const { workNavKeys } = resolveOperatingProfileFromInput(input)
  if (!workNavKeys) return WORK_NAV_ITEMS
  const order = new Map(workNavKeys.map((key, index) => [key, index]))
  return WORK_NAV_ITEMS.filter((item) => order.has(item.key)).sort(
    (a, b) => (order.get(a.key) ?? 0) - (order.get(b.key) ?? 0),
  )
}

/**
 * @param {string} pathname
 * @param {ProcessStep[]} steps
 */
export function resolveActiveProcessStepKey(pathname, steps) {
  return resolveActiveProcessStepKeyFallback(pathname, steps)
}

/**
 * @param {string} routePath
 * @param {ResolveOperatingProfileInput} input
 * @returns {boolean}
 */
export function isRouteAllowedForProfile(routePath, input = {}) {
  const profile = resolveOperatingProfileFromInput(input)
  const normalized = (routePath || '').replace(/\/$/, '')

  if (normalized.startsWith('/plan/sprint') || normalized.startsWith('/work/sprint')) {
    return profile.dataSlices.includes('work_cycles')
  }
  if (normalized.startsWith('/plan/structure')) {
    return profile.dataSlices.includes('projects')
  }
  if (normalized.startsWith('/plan/inbox')) {
    return profile.dataSlices.includes('backlog')
  }
  if (normalized.startsWith('/control/journey')) {
    const steps = profile.processSteps || []
    return steps.some((s) => s.key === 'journey')
  }

  return true
}

/**
 * @param {string} routePath
 * @param {ResolveOperatingProfileInput} input
 * @returns {string}
 */
export function resolveRedirectForDisallowedRoute(routePath, input = {}) {
  const profile = resolveOperatingProfileFromInput(input)
  const normalized = (routePath || '').replace(/\/$/, '')

  if (normalized.startsWith('/work/')) {
    return profile.workDefaultRoute
  }
  if (normalized.startsWith('/control/')) {
    return profile.controlDefaultRoute
  }
  return profile.planDefaultRoute
}