-- Notification summary card component logic
local json = require("json")

---@class NotificationSummary
---@field severityClasses table<string, string>
---@field defaultItems SummaryItem[]
local M = {}

-- Load config from JSON file
local config = json.load("summary.json")
M.severityClasses = config.severityClasses
M.defaultItems = config.defaultItems

---@class SummaryItem
---@field label string
---@field count? number
---@field severity? "info"|"success"|"warning"|"error"
---@field hint? string

---@class EnrichedSummaryItem
---@field label string
---@field count number
---@field severity "info"|"success"|"warning"|"error"
---@field hint? string
---@field classes string

---@class SummaryProps
---@field title? string
---@field subtitle? string
---@field totalLabel? string
---@field items? SummaryItem[]

---@class SummaryData
---@field title string
---@field subtitle? string
---@field totalLabel string
---@field total number
---@field items EnrichedSummaryItem[]

-- Calculate total from items
---@param items SummaryItem[]
---@return number
function M.calculateTotal(items)
  local total = 0
  for _, item in ipairs(items) do
    local count = item.count or 0
    if count > 0 then
      total = total + count
    end
  end
  return total
end

-- Get severity class for an item
---@param severity? "info"|"success"|"warning"|"error"
---@return string
function M.getSeverityClass(severity)
  return M.severityClasses[severity or "info"] or M.severityClasses.info
end

-- Prepare summary data
---@param props SummaryProps
---@return SummaryData
function M.prepareSummary(props)
  local title = props.title or "Notification Summary"
  local subtitle = props.subtitle
  local totalLabel = props.totalLabel or "Total"
  local items = props.items

  if not items or #items == 0 then
    items = M.defaultItems
  end

  local total = M.calculateTotal(items)

  -- Enrich items with severity classes
  local enrichedItems = {}
  for i, item in ipairs(items) do
    enrichedItems[i] = {
      label = item.label,
      count = math.max(item.count or 0, 0),
      severity = item.severity or "info",
      hint = item.hint,
      classes = M.getSeverityClass(item.severity)
    }
  end

  return {
    title = title,
    subtitle = subtitle,
    totalLabel = totalLabel,
    total = total,
    items = enrichedItems
  }
end

return M