/**
 * Primitivas de UI compartidas (botones, tarjetas, badges, campos).
 * Estilo sobrio, pensado para uso en campo (targets grandes, buen contraste).
 */
import React, { ReactNode } from 'react';
import {
  ActivityIndicator,
  StyleProp,
  StyleSheet,
  Text,
  TextInput,
  TextInputProps,
  TouchableOpacity,
  View,
  ViewStyle,
} from 'react-native';

export const COLORS = {
  primary: '#1f6f43',
  warn: '#8a6d00',
  danger: '#b00020',
  muted: '#666',
  border: '#ddd',
  bg: '#f4f4f4',
};

export const ISSUE_STATUS_COLOR: Record<string, string> = {
  open: COLORS.danger,
  in_review: COLORS.warn,
  resolved: COLORS.primary,
  closed: COLORS.muted,
};

export const ISSUE_PRIORITY_COLOR: Record<string, string> = {
  low: COLORS.muted,
  medium: COLORS.primary,
  high: COLORS.warn,
  critical: COLORS.danger,
};

export function Badge({ label, color }: { label: string; color: string }) {
  return (
    <View style={[styles.badge, { backgroundColor: color }]}>
      <Text style={styles.badgeText}>{label}</Text>
    </View>
  );
}

export function PrimaryButton({
  title,
  onPress,
  disabled,
  loading,
  variant = 'primary',
}: {
  title: string;
  onPress: () => void;
  disabled?: boolean;
  loading?: boolean;
  variant?: 'primary' | 'danger' | 'ghost';
}) {
  const bg =
    variant === 'danger' ? COLORS.danger : variant === 'ghost' ? 'transparent' : COLORS.primary;
  const fg = variant === 'ghost' ? COLORS.primary : '#fff';
  return (
    <TouchableOpacity
      style={[
        styles.button,
        { backgroundColor: bg },
        variant === 'ghost' && styles.buttonGhost,
        (disabled || loading) && styles.buttonDisabled,
      ]}
      onPress={onPress}
      disabled={disabled || loading}
    >
      {loading ? (
        <ActivityIndicator color={fg} />
      ) : (
        <Text style={[styles.buttonText, { color: fg }]}>{title}</Text>
      )}
    </TouchableOpacity>
  );
}

export function Card({
  children,
  style,
}: {
  children: ReactNode;
  style?: StyleProp<ViewStyle>;
}) {
  return <View style={[styles.card, style]}>{children}</View>;
}

export function SectionTitle({ children }: { children: ReactNode }) {
  return <Text style={styles.sectionTitle}>{children}</Text>;
}

export function EmptyState({ text }: { text: string }) {
  return <Text style={styles.empty}>{text}</Text>;
}

export function Field({
  label,
  ...props
}: TextInputProps & { label: string }) {
  return (
    <View style={styles.field}>
      <Text style={styles.fieldLabel}>{label}</Text>
      <TextInput style={styles.input} placeholderTextColor="#aaa" {...props} />
    </View>
  );
}

/** Selector simple de opciones (chips). */
export function ChipSelect<T extends string>({
  label,
  value,
  options,
  onChange,
}: {
  label: string;
  value: T | undefined;
  options: readonly T[];
  onChange: (v: T) => void;
}) {
  return (
    <View style={styles.field}>
      <Text style={styles.fieldLabel}>{label}</Text>
      <View style={styles.chips}>
        {options.map((opt) => {
          const active = opt === value;
          return (
            <TouchableOpacity
              key={opt}
              style={[styles.chip, active && styles.chipActive]}
              onPress={() => onChange(opt)}
            >
              <Text style={[styles.chipText, active && styles.chipTextActive]}>{opt}</Text>
            </TouchableOpacity>
          );
        })}
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  badge: { paddingHorizontal: 8, paddingVertical: 2, borderRadius: 10, alignSelf: 'flex-start' },
  badgeText: { color: '#fff', fontSize: 11, fontWeight: '700' },
  button: {
    borderRadius: 8,
    paddingVertical: 13,
    paddingHorizontal: 16,
    alignItems: 'center',
    justifyContent: 'center',
  },
  buttonGhost: { borderWidth: 1, borderColor: COLORS.primary },
  buttonDisabled: { opacity: 0.5 },
  buttonText: { fontSize: 15, fontWeight: '700' },
  card: {
    backgroundColor: COLORS.bg,
    borderRadius: 10,
    padding: 12,
  },
  sectionTitle: { fontSize: 16, fontWeight: '700', marginTop: 8, marginBottom: 4 },
  empty: { color: '#888', textAlign: 'center', marginTop: 24 },
  field: { marginBottom: 12 },
  fieldLabel: { fontSize: 13, color: COLORS.muted, marginBottom: 4, fontWeight: '600' },
  input: {
    borderWidth: 1,
    borderColor: COLORS.border,
    borderRadius: 8,
    paddingHorizontal: 12,
    paddingVertical: 10,
    fontSize: 16,
    backgroundColor: '#fff',
  },
  chips: { flexDirection: 'row', flexWrap: 'wrap', gap: 8 },
  chip: {
    paddingHorizontal: 12,
    paddingVertical: 6,
    borderRadius: 16,
    borderWidth: 1,
    borderColor: COLORS.border,
    backgroundColor: '#fff',
  },
  chipActive: { backgroundColor: COLORS.primary, borderColor: COLORS.primary },
  chipText: { fontSize: 13, color: COLORS.muted },
  chipTextActive: { color: '#fff', fontWeight: '700' },
});