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import type { Qualifier, Section, TemmeSelector } from '../parser/mod.ts'
export const msg = {  invalidFilter(name: string) {    return `${name} is not a valid filter.`  },  invalidModifier(name: string) {    return `${name} is not a valid modifier.`  },  invalidProcedure(name: string) {    return `${name} is not a valid procedure.`  },  hasLeadingAttributeCapture() {    return 'Attribute capturing is only allowed in the last css section. Capture in leading css-selectors will be omitted.'  },  parentRefSelectorAtTopLevel() {    return `Parent-reference must not be at top level.`  },  snippetAlreadyDefined(name: string) {    return `Snippet \`${name}\` is already defined.`  },  snippetDefineNotAtTopLevel(name: string) {    return `The definition of snippet \`${name}\` must be at top level.`  },  filterDefineNotAtTopLevel(name: string) {    return `The definition of inline filter \`${name}\` must be at top level.`  },  filterAlreadyDefined(name: string) {    return `Filter \`${name}\` is already defined.`  },  modifierAlreadyDefined(name: string) {    return `Modifier ${name} is already defined.`  },  procedureAlreadyDefined(name: string) {    return `Procedure ${name} is already defined.`  },  snippetNotDefined(name: string) {    return `Snippet \`${name}\` is not defined.`  },  valueCaptureWithOtherOperator() {    return 'Value capture in attribute qualifier only works with `=` operator.'  },  circularSnippetExpansion(loop: string[]) {    return `Circular snippet expansion detected: ${loop.join(' -> ')}`  },  arrayFilterAppliedToNonArrayValue(filterName: string) {    return `Array-filter \`${filterName}\` can only be applied to an array.`  },}
function isCaptureQualifier(qualifier: Qualifier) {  return (    qualifier.type === 'attribute-qualifier' &&    qualifier.value &&    typeof qualifier.value === 'object'  )}
function containsAnyCapture(sections: Section[]) {  return sections.some(section => section.qualifiers.some(isCaptureQualifier))}
export function checkRootSelector(selector: TemmeSelector) {  commonCheck(selector)  if (selector.type === 'parent-ref-selector') {    throw new Error(msg.parentRefSelectorAtTopLevel())  } else if (selector.type === 'normal-selector') {    for (const child of selector.children) {      checkChild(child)    }  } else if (selector.type === 'snippet-define') {    for (const child of selector.selectors) {      checkChild(child)    }  }}
function commonCheck(selector: TemmeSelector) {  if (selector.type === 'normal-selector') {    const sectionCount = selector.sections.length    const leadingSections = selector.sections.slice(0, sectionCount - 1)    const hasLeadingCapture = containsAnyCapture(leadingSections)    if (hasLeadingCapture) {      throw new Error(msg.hasLeadingAttributeCapture())    }  }}
export function checkChild(selector: TemmeSelector) {  commonCheck(selector)  if (selector.type === 'snippet-define') {    throw new Error(msg.snippetDefineNotAtTopLevel(selector.name))  } else if (selector.type === 'filter-define') {    throw new Error(msg.filterDefineNotAtTopLevel(selector.name))  } else if (selector.type === 'normal-selector') {    for (const child of selector.children) {      checkChild(child)    }  }}