// File: frontend/components/admin/ai/PromptVersionHistory.tsx
// Change Log
// - 2026-05-25: Created PromptVersionHistory component (ADR-029)

import React from 'react';
import { Badge } from '@/components/ui/badge';
import { Button } from '@/components/ui/button';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { CheckCircle2, Trash2, BookOpen, Clock, StickyNote } from 'lucide-react';
import { AiPrompt } from '@/types/ai-prompts';
import { cn } from '@/lib/utils';

interface PromptVersionHistoryProps {
  versions: AiPrompt[];
  isLoading: boolean;
  onLoadTemplate: (version: AiPrompt) => void;
  onActivateVersion: (versionNumber: number) => void;
  onDeleteVersion: (versionNumber: number) => void;
  isActivating: boolean;
  isDeleting: boolean;
}

/**
 * แผงประวัติและเวอร์ชันของ AI Prompts ทางฝั่งขวามือ
 * แสดงรายการเวอร์ชันพร้อมปุ่มเรียกใช้ เปิดทำงาน หรือลบทิ้ง
 */
export default function PromptVersionHistory({
  versions,
  isLoading,
  onLoadTemplate,
  onActivateVersion,
  onDeleteVersion,
  isActivating,
  isDeleting,
}: PromptVersionHistoryProps) {
  if (isLoading) {
    return (
      <div className="flex h-[400px] items-center justify-center text-sm text-muted-foreground">
        <Clock className="mr-2 h-4 w-4 animate-spin text-primary" />
        กำลังโหลดประวัติเวอร์ชัน...
      </div>
    );
  }
  return (
    <Card className="border border-border/50 bg-background/30 backdrop-blur-md transition-all duration-300 hover:shadow-md">
      <CardHeader className="pb-3 border-b border-border/10">
        <CardTitle className="flex items-center gap-2 text-sm font-semibold tracking-wide text-foreground">
          <BookOpen className="h-4 w-4 text-primary animate-pulse" />
          ประวัติเวอร์ชัน (Version History)
        </CardTitle>
      </CardHeader>
      <CardContent className="pt-4 px-3 sm:px-4 max-h-[600px] overflow-y-auto space-y-3">
        {versions.length === 0 ? (
          <div className="flex flex-col items-center justify-center py-10 text-center text-xs text-muted-foreground italic">
            ไม่พบเวอร์ชันอื่นในระบบ
          </div>
        ) : (
          versions.map((version) => {
            const isActive = version.isActive === true || (version.isActive as unknown) === 1;
            return (
            <div
              key={version.versionNumber}
              className={cn(
                'group relative rounded-lg border border-border/30 bg-background/50 p-3.5 transition-all duration-200 hover:border-primary/30 hover:bg-background/80',
                isActive && 'border-emerald-500/20 bg-emerald-500/[0.02] shadow-[inset_0_1px_3px_rgba(16,185,129,0.03)]'
              )}
            >
              <div className="flex items-start justify-between gap-3">
                <div className="space-y-1">
                  <div className="flex items-center gap-2">
                    <span className="font-mono text-sm font-bold text-foreground">
                      v{version.versionNumber}
                    </span>
                    {isActive ? (
                      <Badge className="border-emerald-500/20 bg-emerald-500/10 text-emerald-500 hover:bg-emerald-500/20 text-[10px] py-0 px-1.5 flex items-center gap-1 select-none">
                        <CheckCircle2 className="h-3 w-3" />
                        ใช้งานจริง (Active)
                      </Badge>
                    ) : (
                      <Badge variant="outline" className="text-[10px] text-muted-foreground border-border/50 bg-background/40 select-none">
                        ร่าง (Inactive)
                      </Badge>
                    )}
                  </div>
                  <div className="flex flex-col gap-1 text-[11px] text-muted-foreground">
                    <span className="flex items-center gap-1">
                      <Clock className="h-3 w-3" />
                      สร้าง: {new Date(version.createdAt).toLocaleString('th-TH')}
                    </span>
                    {version.lastTestedAt && (
                      <span className="flex items-center gap-1 text-emerald-500/90">
                        <CheckCircle2 className="h-3 w-3 text-emerald-500" />
                        ทดสอบแล้ว: {new Date(version.lastTestedAt).toLocaleString('th-TH')}
                      </span>
                    )}
                  </div>
                </div>
                <div className="flex items-center gap-1.5 opacity-90 sm:opacity-0 group-hover:opacity-100 transition-opacity duration-200">
                  <Button
                    variant="ghost"
                    size="sm"
                    className="h-7 text-[10px] text-muted-foreground hover:bg-secondary"
                    onClick={() => onLoadTemplate(version)}
                  >
                    โหลด (Load)
                  </Button>
                  {!version.isActive && (
                    <>
                      <Button
                        variant="ghost"
                        size="sm"
                        disabled={isActivating}
                        className="h-7 text-[10px] text-emerald-500 hover:text-emerald-600 hover:bg-emerald-500/10"
                        onClick={() => onActivateVersion(version.versionNumber)}
                      >
                        ใช้งาน (Activate)
                      </Button>
                      <Button
                        variant="ghost"
                        size="sm"
                        disabled={isDeleting}
                        className="h-7 w-7 text-destructive hover:bg-destructive/10"
                        onClick={() => onDeleteVersion(version.versionNumber)}
                      >
                        <Trash2 className="h-3.5 w-3.5" />
                      </Button>
                    </>
                  )}
                </div>
              </div>
              {version.manualNote && (
                <div className="mt-2.5 rounded bg-muted/30 p-2 border border-border/10 flex gap-1.5 items-start text-[11px] text-muted-foreground select-text">
                  <StickyNote className="h-3.5 w-3.5 text-amber-500 shrink-0 mt-0.5" />
                  <p className="leading-relaxed whitespace-pre-wrap">{version.manualNote}</p>
                </div>
              )}
            </div>
          );})
        )}
      </CardContent>
    </Card>
  );
}