"use client"

import { Plus, Trash2 } from "lucide-react"
import type {
  ProceduresStatsSectionData,
  ProceduresStat,
} from "@/lib/pages/procedures-page/form-types"

interface Props {
  value: ProceduresStatsSectionData
  onChange: (value: ProceduresStatsSectionData) => void
  disabled?: boolean
  validation?: {
    stats?: boolean
    statItems?: Array<{ label?: boolean; value?: boolean }>
  }
}

function fieldClass(invalid = false) {
  return `w-full bg-card border rounded-xl px-3 py-2.5 text-sm text-foreground font-sans placeholder:text-muted-foreground outline-none transition-colors focus:ring-2 ${
    invalid
      ? "border-red-400 focus:ring-red-200/70 focus:border-red-500"
      : "border-border focus:ring-[#2BB673]/30 focus:border-[#2BB673]"
  }`
}

function Label({ children }: { children: React.ReactNode }) {
  return (
    <label className="text-xs font-bold text-foreground font-sans uppercase tracking-wider">
      {children}
    </label>
  )
}

export function ProceduresStatsSection({ value, onChange, disabled = false, validation }: Props) {
  function addStat() {
    if (disabled) return
    onChange({ stats: [...value.stats, { label: "", value: "" }] })
  }

  function removeStat(index: number) {
    onChange({ stats: value.stats.filter((_, i) => i !== index) })
  }

  function updateStat(index: number, field: keyof ProceduresStat, val: string) {
    onChange({
      stats: value.stats.map((s, i) => (i === index ? { ...s, [field]: val } : s)),
    })
  }

  return (
    <div className={`flex flex-col gap-3 rounded-xl ${validation?.stats && value.stats.length === 0 ? "border border-red-300 p-3 bg-red-50/40" : ""}`}>
      <div className="flex items-center justify-between gap-2">
        <div className="flex flex-col gap-0.5">
          <Label>Statistics</Label>
          <span className="text-xs text-muted-foreground font-sans">Key numbers displayed in the stats bar</span>
        </div>
        <button
          type="button"
          onClick={addStat}
          disabled={disabled}
          className="flex cursor-pointer items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-semibold font-sans transition-all hover:brightness-105 active:scale-[0.98] disabled:opacity-50 disabled:cursor-not-allowed"
          style={{ background: "rgba(43,182,115,0.10)", color: "var(--brand-green)" }}
        >
          <Plus className="w-3.5 h-3.5" aria-hidden="true" />
          Add Stat
        </button>
      </div>

      {value.stats.length === 0 ? (
        <div className="flex flex-col items-center justify-center gap-2 py-8 rounded-xl border border-dashed border-border">
          <p className="text-xs text-muted-foreground font-sans">No statistics yet.</p>
          <button
            type="button"
            onClick={addStat}
            disabled={disabled}
            className="text-xs font-semibold font-sans disabled:opacity-50"
            style={{ color: "var(--brand-green)" }}
          >
            Add your first stat
          </button>
        </div>
      ) : (
        <div className="flex flex-col gap-3">
          {value.stats.map((stat, index) => (
            <div
              key={index}
              className="flex flex-col gap-3 p-4 rounded-xl border border-border bg-muted/40"
            >
              <div className="flex items-center justify-between">
                <span
                  className="text-xs font-bold font-sans px-2 py-0.5 rounded-md"
                  style={{ background: "rgba(29,45,104,0.08)", color: "var(--brand-navy)" }}
                >
                  Stat {index + 1}
                </span>
                <button
                  type="button"
                  onClick={() => removeStat(index)}
                  disabled={disabled}
                  className="p-1.5 cursor-pointer rounded-lg text-muted-foreground hover:text-red-500 hover:bg-red-50 transition-colors"
                  aria-label={`Remove stat ${index + 1}`}
                >
                  <Trash2 className="w-3.5 h-3.5" aria-hidden="true" />
                </button>
              </div>

              <div className="grid grid-cols-2 gap-3">
                <div className="flex flex-col gap-1.5">
                  <label className="text-xs font-semibold text-muted-foreground font-sans">Value</label>
                  <input
                    type="text"
                    value={stat.value}
                    disabled={disabled}
                    onChange={(e) => updateStat(index, "value", e.target.value)}
                    placeholder="e.g. 50,000+"
                    className={fieldClass(!!validation?.statItems?.[index]?.value)}
                  />
                </div>
                <div className="flex flex-col gap-1.5">
                  <label className="text-xs font-semibold text-muted-foreground font-sans">Label</label>
                  <input
                    type="text"
                    value={stat.label}
                    disabled={disabled}
                    onChange={(e) => updateStat(index, "label", e.target.value)}
                    placeholder="e.g. Procedures Performed"
                    className={fieldClass(!!validation?.statItems?.[index]?.label)}
                  />
                </div>
              </div>
            </div>
          ))}
        </div>
      )}
    </div>
  )
}