I fixed the filter for all the leads

src/lib/date-utils.ts

@@ -0,0 +1,95 @@
+import { Lead } from "@/types"
+
+export function getPeriodDateRange(period: string): { start: Date; end: Date } {
+  const end = new Date()
+  const start = new Date()
+
+  switch (period) {
+    case "7days":
+      start.setDate(start.getDate() - 7)
+      break
+    case "30days":
+      start.setDate(start.getDate() - 30)
+      break
+    case "6months":
+      start.setMonth(start.getMonth() - 6)
+      break
+    case "12months":
+      start.setMonth(start.getMonth() - 12)
+      break
+    default:
+      start.setMonth(start.getMonth() - 6)
+  }
+
+  return { start, end }
+}
+
+export function filterLeadsByPeriod(leads: Lead[], period: string): Lead[] {
+  const { start, end } = getPeriodDateRange(period)
+  return leads.filter((l) => {
+    const d = new Date(l.createdAt)
+    return d >= start && d <= end
+  })
+}
+
+export function groupLeadsByInterval(
+  leads: Lead[],
+  period: string
+): { label: string; leads: number; closed: number }[] {
+  const { start, end } = getPeriodDateRange(period)
+
+  if (period === "7days" || period === "30days") {
+    return groupByDay(leads, start, end)
+  }
+  return groupByMonth(leads, start, end)
+}
+
+function groupByDay(
+  leads: Lead[],
+  start: Date,
+  end: Date
+): { label: string; leads: number; closed: number }[] {
+  const result: { label: string; leads: number; closed: number }[] = []
+  const current = new Date(start)
+
+  while (current <= end) {
+    const dateStr = current.toISOString().slice(0, 10)
+    const dayLeads = leads.filter((l) => l.createdAt.startsWith(dateStr))
+    const closedCount = dayLeads.filter((l) => l.status === "closed").length
+
+    result.push({
+      label: current.toLocaleDateString("en-US", { month: "short", day: "numeric" }),
+      leads: dayLeads.length,
+      closed: closedCount,
+    })
+
+    current.setDate(current.getDate() + 1)
+  }
+
+  return result
+}
+
+function groupByMonth(
+  leads: Lead[],
+  start: Date,
+  end: Date
+): { label: string; leads: number; closed: number }[] {
+  const result: { label: string; leads: number; closed: number }[] = []
+  const current = new Date(start.getFullYear(), start.getMonth(), 1)
+
+  while (current <= end) {
+    const yearMonth = `${current.getFullYear()}-${String(current.getMonth() + 1).padStart(2, "0")}`
+    const monthLeads = leads.filter((l) => l.createdAt.startsWith(yearMonth))
+    const closedCount = monthLeads.filter((l) => l.status === "closed").length
+
+    result.push({
+      label: current.toLocaleDateString("en-US", { month: "short", year: "2-digit" }),
+      leads: monthLeads.length,
+      closed: closedCount,
+    })
+
+    current.setMonth(current.getMonth() + 1)
+  }
+
+  return result
+}