"use client"

import { Plus, Trash2 } from "lucide-react"
import { IconPicker } from "@/components/dashboard/shared/IconPicker"

export interface CoreValue {
  title: string
  description: string
  icon: string
}

export interface CoreValuesSectionData {
  eyebrow: string
  title: string
  subtitle: string
  values: CoreValue[]
}

interface Props {
  value: CoreValuesSectionData
  onChange: (value: CoreValuesSectionData) => void
  validation?: {
    eyebrow?: boolean
    title?: boolean
    subtitle?: boolean
    values?: boolean
    valueItems?: Array<{ title?: boolean; description?: boolean; icon?: 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 CoreValuesSection({ value, onChange, validation }: Props) {
  function set<K extends keyof CoreValuesSectionData>(key: K, val: CoreValuesSectionData[K]) {
    onChange({ ...value, [key]: val })
  }

  function addValue() {
    set("values", [...value.values, { title: "", description: "", icon: "" }])
  }

  function removeValue(index: number) {
    set("values", value.values.filter((_, i) => i !== index))
  }

  function updateValue(index: number, field: keyof CoreValue, val: string) {
    set("values", value.values.map((v, i) => (i === index ? { ...v, [field]: val } : v)))
  }

  return (
    <div className="flex flex-col gap-5">
      <div className="flex flex-col gap-1.5">
        <Label>Eyebrow Text</Label>
        <input
          type="text"
          value={value.eyebrow}
          onChange={(e) => set("eyebrow", e.target.value)}
          placeholder="e.g. What We Stand For"
          className={fieldClass(!!validation?.eyebrow)}
        />
      </div>

      <div className="flex flex-col gap-1.5">
        <Label>Title</Label>
        <input
          type="text"
          value={value.title}
          onChange={(e) => set("title", e.target.value)}
          placeholder="e.g. Our Core Values"
          className={fieldClass(!!validation?.title)}
        />
      </div>

      <div className="flex flex-col gap-1.5">
        <Label>Subtitle</Label>
        <textarea
          value={value.subtitle}
          onChange={(e) => set("subtitle", e.target.value)}
          placeholder="A brief subtitle describing your values..."
          rows={2}
          className={`${fieldClass(!!validation?.subtitle)} resize-none leading-relaxed`}
        />
      </div>

      {/* Values */}
      <div
        className={`flex flex-col gap-3 rounded-xl ${
          validation?.values && value.values.length === 0 ? "border border-red-300 p-3 bg-red-50/40" : ""
        }`}
      >
        <div className="flex items-center justify-between">
          <Label>Values</Label>
          <button
            type="button"
            onClick={addValue}
            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]"
            style={{ background: "rgba(43,182,115,0.10)", color: "var(--brand-green)" }}
          >
            <Plus className="w-3.5 h-3.5" aria-hidden="true" />
            Add Value
          </button>
        </div>

        {value.values.length === 0 ? (
          <div className="flex flex-col items-center justify-center gap-2 py-6 rounded-xl border border-dashed border-border">
            <p className="text-xs text-muted-foreground font-sans">No values yet.</p>
            <button
              type="button"
              onClick={addValue}
              className="text-xs cursor-pointer font-semibold font-sans"
              style={{ color: "var(--brand-green)" }}
            >
              Add your first value
            </button>
          </div>
        ) : (
          <div className="flex flex-col gap-3">
            {value.values.map((val, 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)" }}
                  >
                    Value {index + 1}
                  </span>
                  <button
                    type="button"
                    onClick={() => removeValue(index)}
                    className="p-1.5 cursor-pointer rounded-lg text-muted-foreground hover:text-red-500 hover:bg-red-50 transition-colors"
                    aria-label={`Remove value ${index + 1}`}
                  >
                    <Trash2 className="w-3.5 h-3.5" aria-hidden="true" />
                  </button>
                </div>
                <input
                  type="text"
                  value={val.title}
                  onChange={(e) => updateValue(index, "title", e.target.value)}
                  placeholder="Value title..."
                  className={fieldClass(!!validation?.valueItems?.[index]?.title)}
                />
                <textarea
                  value={val.description}
                  onChange={(e) => updateValue(index, "description", e.target.value)}
                  placeholder="Value description..."
                  rows={2}
                  className={`${fieldClass(!!validation?.valueItems?.[index]?.description)} resize-none leading-relaxed`}
                />
                <IconPicker
                  value={val.icon}
                  onChange={(key) => updateValue(index, "icon", key)}
                  invalid={!!validation?.valueItems?.[index]?.icon}
                />
              </div>
            ))}
          </div>
        )}
      </div>
    </div>
  )
}