package com.campus.trade.controller;

import com.campus.trade.common.Result;
import com.campus.trade.dto.ItemPublishRequest;
import com.campus.trade.service.ItemService;
import com.campus.trade.vo.ItemVO;
import com.campus.trade.vo.PageResult;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpSession;
import jakarta.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/items")
@Tag(name = "Items", description = "物品发布、浏览、搜索、管理")
public class ItemController {

    @Autowired
    private ItemService itemService;

    @Operation(summary = "首页物品列表", description = "按发布时间倒序，分页返回")
    @GetMapping
    public Result<PageResult<ItemVO>> list(@RequestParam(defaultValue = "1") int pageNum,
                                            @RequestParam(defaultValue = "10") int pageSize) {
        return Result.success(PageResult.of(itemService.list(pageNum, pageSize)));
    }

    @Operation(summary = "搜索物品", description = "按标题/描述模糊匹配")
    @GetMapping("/search")
    public Result<PageResult<ItemVO>> search(@RequestParam String keyword,
                                              @RequestParam(defaultValue = "1") int pageNum,
                                              @RequestParam(defaultValue = "10") int pageSize) {
        return Result.success(PageResult.of(itemService.search(keyword, pageNum, pageSize)));
    }

    @Operation(summary = "按分类筛选")
    @GetMapping("/category/{id}")
    public Result<PageResult<ItemVO>> byCategory(@Parameter(description = "分类ID") @PathVariable Long id,
                                                  @RequestParam(defaultValue = "1") int pageNum,
                                                  @RequestParam(defaultValue = "10") int pageSize) {
        return Result.success(PageResult.of(itemService.byCategory(id, pageNum, pageSize)));
    }

    @Operation(summary = "物品详情")
    @GetMapping("/{id}")
    public Result<ItemVO> detail(@Parameter(description = "物品ID") @PathVariable Long id) {
        return Result.success(itemService.detail(id));
    }

    @Operation(summary = "发布物品", description = "需要实名认证，图片以 multipart 上传")
    @PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    public Result<Long> publish(@Valid ItemPublishRequest req, HttpSession session) {
        return Result.success(itemService.publish(req, session));
    }

    @Operation(summary = "我的发布列表")
    @GetMapping("/my")
    public Result<List<ItemVO>> myItems(HttpSession session) {
        return Result.success(itemService.myItems(session));
    }

    @Operation(summary = "下架物品", description = "卖家下架自己的物品")
    @PutMapping("/{id}/offline")
    public Result<Void> offline(@Parameter(description = "物品ID") @PathVariable Long id, HttpSession session) {
        itemService.offline(id, session);
        return Result.success();
    }

    @Operation(summary = "删除物品", description = "卖家删除自己的物品")
    @DeleteMapping("/{id}")
    public Result<Void> delete(@Parameter(description = "物品ID") @PathVariable Long id, HttpSession session) {
        itemService.delete(id, session);
        return Result.success();
    }
}