import { describe, expect, it } from "vitest"

import { dictionaries, getDictionary } from "@/i18n/dictionaries"
import { SUPPORTED_LOCALES } from "@/i18n/locales"

describe("i18n dictionaries", () => {
  it("provides dictionaries for every supported locale and no extra locales", () => {
    expect(Object.keys(dictionaries).sort()).toEqual(
      [...SUPPORTED_LOCALES].sort(),
    )
  })

  it("returns localized login copy for English and Spanish", () => {
    expect(getDictionary("en").login).toEqual({
      title: "Sign In",
      usernameLabel: "Username",
      passwordLabel: "Password",
      submitLabel: "Sign In",
    })

    expect(getDictionary("es").login).toEqual({
      title: "Iniciar sesión",
      usernameLabel: "Usuario",
      passwordLabel: "Contraseña",
      submitLabel: "Iniciar sesión",
    })
  })

  it("provides localized language switcher copy for English and Spanish", () => {
    expect(getDictionary("en").common.languageSwitcher).toEqual({
      label: "Language",
      options: {
        en: "English",
        es: "Spanish",
      },
    })

    expect(getDictionary("es").common.languageSwitcher).toEqual({
      label: "Idioma",
      options: {
        en: "Inglés",
        es: "Español",
      },
    })
  })

  it("provides localized shell and common copy for English and Spanish", () => {
    expect(getDictionary("en").layout).toEqual({
      sidebar: {
        home: "Home",
        inventory: "Inventory",
        items: "Items",
        categories: "Categories",
        assets: "Assets",
        recipients: "Recipients",
        movements: "Movements",
        assignments: "Assignments",
        users: "Users",
      },
      navbar: {
        accountLabel: "My Account",
      },
      addMenu: {
        add: "Add",
        import: "Import",
        category: "Category",
        item: "Item",
        asset: "Asset",
        recipient: "Recipient",
        assignment: "Assignment",
      },
      resetDatabase: {
        idle: "Reset Database",
        loading: "Resetting...",
        successToast: "Database reset successfully",
        errorToast: "Error resetting database",
      },
      logout: {
        label: "Sign Out",
      },
    })

    expect(getDictionary("es").layout).toEqual({
      sidebar: {
        home: "Inicio",
        inventory: "Inventario",
        items: "Artículos",
        categories: "Categorías",
        assets: "Activos",
        recipients: "Destinatarios",
        movements: "Movimientos",
        assignments: "Asignaciones",
        users: "Usuarios",
      },
      navbar: {
        accountLabel: "Mi cuenta",
      },
      addMenu: {
        add: "Añadir",
        import: "Importar",
        category: "Categoría",
        item: "Artículo",
        asset: "Activo",
        recipient: "Destinatario",
        assignment: "Asignación",
      },
      resetDatabase: {
        idle: "Reiniciar base de datos",
        loading: "Reiniciando...",
        successToast: "Base de datos reiniciada correctamente",
        errorToast: "Error al reiniciar la base de datos",
      },
      logout: {
        label: "Cerrar sesión",
      },
    })

    expect(getDictionary("en").common.search).toEqual({
      placeholder: "Search...",
      label: "Search",
      clearLabel: "Clear search",
    })
    expect(getDictionary("es").common.search).toEqual({
      placeholder: "Buscar...",
      label: "Buscar",
      clearLabel: "Limpiar búsqueda",
    })

    expect(getDictionary("en").common.pagination).toEqual({
      summaryPrefix: "Showing page",
      summarySeparator: "of",
      previous: "Previous",
      next: "Next",
    })
    expect(getDictionary("es").common.pagination).toEqual({
      summaryPrefix: "Mostrando página",
      summarySeparator: "de",
      previous: "Anterior",
      next: "Siguiente",
    })

    expect(getDictionary("en").common.submitButton).toEqual({
      defaultLabel: "Submit",
      processing: "Processing",
      success: "Success",
    })

    expect(getDictionary("en").common.forbidden).toEqual({
      title: "Access denied",
      description: "You do not have permission to access this section.",
      homeLink: "Back to home",
    })
    expect(getDictionary("es").common.submitButton).toEqual({
      defaultLabel: "Enviar",
      processing: "Procesando",
      success: "Completado",
    })

    expect(getDictionary("es").common.forbidden).toEqual({
      title: "Acceso denegado",
      description: "No tienes permisos para acceder a esta sección.",
      homeLink: "Volver al inicio",
    })
  })

  it("keeps dashboard home dictionary keys aligned across locales", () => {
    expect(getDictionary("en").dashboardHome).toEqual({
      heading: "Dashboard",
      cards: {
        items: {
          title: "Total Items",
          countLabel: "Total",
        },
        assets: {
          title: "Total Assets",
          countLabel: "Total",
        },
        recipients: {
          title: "Total Recipients",
          countLabel: "Total",
        },
      },
    })

    expect(getDictionary("es").dashboardHome).toEqual({
      heading: "Panel de control",
      cards: {
        items: {
          title: "Total de artículos",
          countLabel: "Total",
        },
        assets: {
          title: "Total de activos",
          countLabel: "Total",
        },
        recipients: {
          title: "Total de destinatarios",
          countLabel: "Total",
        },
      },
    })
  })

  it("has exact structural parity between English and Spanish dictionaries", () => {
    expect(extractKeyPaths(getDictionary("es"))).toEqual(
      extractKeyPaths(getDictionary("en")),
    )
  })
})

function extractKeyPaths(value: unknown, prefix = ""): string[] {
  if (!isPlainObject(value)) return [prefix]

  return Object.keys(value)
    .sort()
    .flatMap((key) =>
      extractKeyPaths(value[key], prefix ? `${prefix}.${key}` : key),
    )
}

function isPlainObject(value: unknown): value is Record<string, unknown> {
  return typeof value === "object" && value !== null && !Array.isArray(value)
}