<?php

namespace App\Http\Controllers\Admin;

use App\Exports\BaseExport;
use App\Exports\CommonExport;
use App\Helpers\ResponseCode;
use App\Models\AppointmentType;
use App\Models\CustomForm;
use App\Models\Dialogue;
use App\Models\Message;
use App\Models\SupplyDemand;
use App\Models\SupplyDemandType;
use Illuminate\Support\Facades\Validator;
use Maatwebsite\Excel\Facades\Excel;

class SupplyDemandController extends BaseController
{

    /**
     * 构造函数
     */
    public function __construct()
    {
        parent::__construct(new SupplyDemand());
    }

    /**
     * @OA\Get(
     *     path="/api/admin/supply-demand/index",
     *     tags={"供需信息管理"},
     *     summary="列表",
     *     description="",
     *     @OA\Parameter(name="is_export", in="query", @OA\Schema(type="string"), required=false, description="是否导出0否1是"),
     *     @OA\Parameter(name="export_fields", in="query", @OA\Schema(type="string"), required=false, description="需要导出的字段数组"),
     *     @OA\Parameter(name="filter", in="query", @OA\Schema(type="string"), required=false, description="查询条件。数组"),
     *     @OA\Parameter(name="show_relation", in="query", @OA\Schema(type="string"), required=false, description="需要输出的关联关系数组，包括：teacher，courseSettings，coursePeriods"),
     *     @OA\Parameter(name="page_size", in="query", @OA\Schema(type="string"), required=false, description="每页显示的条数"),
     *     @OA\Parameter(name="page", in="query", @OA\Schema(type="string"), required=false, description="页码"),
     *     @OA\Parameter(name="sort_name", in="query", @OA\Schema(type="string"), required=false, description="排序字段名字"),
     *     @OA\Parameter(name="sort_type", in="query", @OA\Schema(type="string"), required=false, description="排序类型"),
     *     @OA\Parameter(name="token", in="query", @OA\Schema(type="string"), required=true, description="token"),
     *     @OA\Response(
     *      response="200",
     *      description="暂无"
     *     )
     * )
     */
    public function index()
    {
        $all = request()->all();
        $list = $this->model->with('user')->where(function ($query) use ($all) {
            if (isset($all['filter']) && !empty($all['filter'])) {
                foreach ($all['filter'] as $condition) {
                    $key = $condition['key'] ?? null;
                    $op = $condition['op'] ?? null;
                    $value = $condition['value'] ?? null;
                    if (!isset($key) || !isset($op) || !isset($value)) {
                        continue;
                    }
                    // 等于
                    if ($op == 'eq') {
                        $query->where($key, $value);
                    }
                    // 不等于
                    if ($op == 'neq') {
                        $query->where($key, '!=', $value);
                    }
                    // 大于
                    if ($op == 'gt') {
                        $query->where($key, '>', $value);
                    }
                    // 大于等于
                    if ($op == 'egt') {
                        $query->where($key, '>=', $value);
                    }
                    // 小于
                    if ($op == 'lt') {
                        $query->where($key, '<', $value);
                    }
                    // 小于等于
                    if ($op == 'elt') {
                        $query->where($key, '<=', $value);
                    }
                    // 模糊搜索
                    if ($op == 'like') {
                        $query->where($key, 'like', '%' . $value . '%');
                    }
                    // 否定模糊搜索
                    if ($op == 'notlike') {
                        $query->where($key, 'not like', '%' . $value . '%');
                    }
                    // 范围搜索
                    if ($op == 'range') {
                        list($from, $to) = explode(',', $value);
                        if (empty($from) || empty($to)) {
                            continue;
                        }
                        $query->whereBetween($key, [$from, $to]);
                    }
                }
            }
        })->orderBy($all['sort_name'] ?? 'id', $all['sort_type'] ?? 'desc');
        if (isset($all['is_export']) && !empty($all['is_export'])) {
            $list = $list->limit(5000)->get()->toArray();
            return Excel::download(new CommonExport($list, $all['export_fields'] ?? ''), $all['file_name'] ?? '' . date('YmdHis') . '.xlsx');
        } else {
            // 输出
            $list = $list->paginate($all['page_size'] ?? 20);
        }
        return $this->success($list);
    }

    /**
     * @OA\Get(
     *     path="/api/admin/supply-demand/show",
     *     tags={"供需信息管理"},
     *     summary="详情",
     *     description="",
     *     @OA\Parameter(name="id", in="query", @OA\Schema(type="string"), required=true, description="id"),
     *     @OA\Parameter(name="show_relation", in="query", @OA\Schema(type="string"), required=false, description="需要输出的关联关系数组，填写输出指定数据"),
     *     @OA\Parameter(name="token", in="query", @OA\Schema(type="string"), required=true, description="token"),
     *     @OA\Response(
     *      response="200",
     *      description="暂无"
     *     )
     * )
     */
    public function show()
    {
        $all = \request()->all();
        $messages = [
            'id.required' => 'Id必填',
        ];
        $validator = Validator::make($all, [
            'id' => 'required'
        ], $messages);
        if ($validator->fails()) {
            return $this->fail([ResponseCode::ERROR_PARAMETER, implode(',', $validator->errors()->all())]);
        }
        $detail = $this->model->with('user')->find($all['id']);
        return $this->success($detail);
    }

    /**
     * @OA\Post(
     *     path="/api/admin/supply-demand/save",
     *     tags={"供需信息管理"},
     *     summary="更新或新增",
     *     @OA\Parameter(name="id", in="query", @OA\Schema(type="integer"), required=false, description="需求供应表ID（存在则更新，不存在则新增）"),
     *     @OA\Parameter(name="title", in="query", @OA\Schema(type="string"), required=false, description="标题"),
     *     @OA\Parameter(name="supply_demand_type_id", in="query", @OA\Schema(type="integer"), required=false, description="分类ID"),
     *     @OA\Parameter(name="content", in="query", @OA\Schema(type="string"), required=false, description="内容"),
     *     @OA\Parameter(name="tag", in="query", @OA\Schema(type="string"), required=false, description="标签"),
     *     @OA\Parameter(name="wechat", in="query", @OA\Schema(type="string"), required=false, description="微信号"),
     *     @OA\Parameter(name="mobile", in="query", @OA\Schema(type="string"), required=false, description="电话"),
     *     @OA\Parameter(name="email", in="query", @OA\Schema(type="string"), required=false, description="邮箱"),
     *     @OA\Parameter(name="status", in="query", @OA\Schema(type="integer"), required=false, description="状态0待审核1通过2拒绝3退回修改4永久隐藏"),
     *     @OA\Response(
     *         response=200,
     *         description="操作成功"
     *     )
     * )
     */
    public function save()
    {
        return parent::save();
    }

    /**
     * @OA\Get(
     *     path="/api/admin/supply-demand/destroy",
     *     tags={"供需信息管理"},
     *     summary="删除",
     *     description="",
     *     @OA\Parameter(name="id", in="query", @OA\Schema(type="string"), required=true, description="id"),
     *     @OA\Parameter(name="token", in="query", @OA\Schema(type="string"), required=true, description="token"),
     *     @OA\Response(
     *      response="200",
     *      description="暂无"
     *     )
     * )
     */
    public function destroy()
    {
        return parent::destroy();
    }

    /**
     * @OA\Get(
     *     path="/api/admin/supply-demand/chart",
     *     tags={"供需信息管理"},
     *     summary="交互统计",
     *     description="",
     *     @OA\Parameter(name="start_date", in="query", @OA\Schema(type="string"), required=true, description="开始日期"),
     *     @OA\Parameter(name="end_date", in="query", @OA\Schema(type="string"), required=true, description="结束日期"),
     *     @OA\Parameter(name="type", in="query", @OA\Schema(type="string"), required=true, description="type类型"),
     *     @OA\Parameter(name="page_size", in="query", @OA\Schema(type="string"), required=false, description="每页显示的条数"),
     *     @OA\Parameter(name="page", in="query", @OA\Schema(type="string"), required=false, description="页码"),
     *     @OA\Parameter(name="token", in="query", @OA\Schema(type="string"), required=true, description="token"),
     *     @OA\Response(
     *      response="200",
     *      description="暂无"
     *     )
     * )
     */
    public function chart()
    {
        $start = \Illuminate\Support\Carbon::parse(request('start_date', date('Y-m-d')))->startOfDay();
        $end = \Illuminate\Support\Carbon::parse(request('end_date', date('Y-m-d')))->endOfDay();
        if ($start->gt($end)) {
            return $this->fail([ResponseCode::ERROR_PARAMETER, '开始日期不能晚于结束日期']);
        }
        $type = request('type');
        $days = $start->diffInDays($end->copy()->startOfDay()) + 1;
        $prevEnd = $start->copy()->subDay()->endOfDay();
        $prevStart = $start->copy()->subDays($days);
        $supplyQuery = function () use ($type) {
            return SupplyDemand::when($type, function ($q) use ($type) {
                $q->where('type', $type);
            });
        };
        // 发布数按发布时间，私信与双向交互按消息发生时间统计。
        $messageQuery = function ($from, $to) use ($type) {
            return Message::whereBetween('created_at', [$from, $to])
                ->whereColumn('user_id', '<>', 'to_user_id')
                ->whereHas('supplyDemand', function ($q) use ($type) {
                    if ($type) $q->where('type', $type);
                });
        };
        $supplyDemandCount = $supplyQuery()->whereBetween('created_at', [$start, $end])->count();
        $prevSupplyDemandCount = $supplyQuery()->whereBetween('created_at', [$prevStart, $prevEnd])->count();
        $messageCount = $messageQuery($start, $end)->count();
        $prevMessageCount = $messageQuery($prevStart, $prevEnd)->count();
        // 同一供需、同一会话中双方均有发言，计一次。
        $interactionCount = $messageQuery($start, $end)->whereNotNull('dialogue_id')
            ->select('supply_demand_id', 'dialogue_id')->groupBy('supply_demand_id', 'dialogue_id')
            ->havingRaw('COUNT(DISTINCT user_id) >= 2')->get()->count();
        $prevInteractionCount = $messageQuery($prevStart, $prevEnd)->whereNotNull('dialogue_id')
            ->select('supply_demand_id', 'dialogue_id')->groupBy('supply_demand_id', 'dialogue_id')
            ->havingRaw('COUNT(DISTINCT user_id) >= 2')->get()->count();
        $supplyDemandGrowthRate = $this->calculateGrowthRate($supplyDemandCount, $prevSupplyDemandCount);
        $messageGrowthRate = $this->calculateGrowthRate($messageCount, $prevMessageCount);
        $interactionGrowthRate = $this->calculateGrowthRate($interactionCount, $prevInteractionCount);
        // 包含本期发布的信息，以及历史发布但本期有咨询的信息。
        $list = $supplyQuery()->with(['user', 'messages' => function ($q) use ($start, $end) {
            $q->whereBetween('created_at', [$start, $end])
                ->whereColumn('user_id', '<>', 'to_user_id')
                ->with(['dialogue.user', 'dialogue.toUser'])->orderBy('created_at', 'desc');
        }])->where(function ($q) use ($start, $end) {
            $q->whereBetween('created_at', [$start, $end])->orWhereHas('messages', function ($m) use ($start, $end) {
                $m->whereBetween('created_at', [$start, $end])->whereColumn('user_id', '<>', 'to_user_id');
            });
        })->orderBy('id', 'desc')->paginate(request('page_size', 20));
        foreach ($list as $item) {
            $dialogues = $item->messages->pluck('dialogue')->filter()->unique('id')->values();
            $item->setRelation('dialogues', $dialogues);
            $item->unsetRelation('messages');
        }
        return $this->success([
            'list' => $list,
            'supply_demand_count' => $supplyDemandCount,
            'prev_supply_demand_count' => $prevSupplyDemandCount,
            'supply_demand_growth_rate' => $supplyDemandGrowthRate,
            'message_count' => $messageCount,
            'prev_message_count' => $prevMessageCount,
            'message_growth_rate' => $messageGrowthRate,
            'interaction_count' => $interactionCount,
            'prev_interaction_count' => $prevInteractionCount,
            'interaction_growth_rate' => $interactionGrowthRate,
        ]);
    }

    /**
     * 计算增长率
     * @param int $current 当前数值
     * @param int $previous 上期数值
     * @return array 包含增长率和增长状态
     */
    private function calculateGrowthRate($current, $previous)
    {
        if ($previous == 0) {
            if ($current > 0) {
                return [
                    'rate' => 100,
                    'status' => 'increase',
                    'display' => '+100%'
                ];
            } else {
                return [
                    'rate' => 0,
                    'status' => 'stable',
                    'display' => '0%'
                ];
            }
        }

        $rate = round(($current - $previous) / $previous * 100, 2);

        if ($rate > 0) {
            $status = 'increase';
            $display = '+' . $rate . '%';
        } elseif ($rate < 0) {
            $status = 'decrease';
            $display = $rate . '%';
        } else {
            $status = 'stable';
            $display = '0%';
        }

        return [
            'rate' => $rate,
            'status' => $status,
            'display' => $display
        ];
    }


    /**
     * @OA\Get(
     *     path="/api/admin/supply-demand/message-list",
     *     tags={"供需信息管理"},
     *     summary="消息列表",
     *     description="",
     *     @OA\Parameter(name="to_user_id", in="query", @OA\Schema(type="string"), required=true, description="接收人"),
     *     @OA\Parameter(name="user_id", in="query", @OA\Schema(type="string"), required=true, description="发起人"),
     *     @OA\Parameter(name="page_size", in="query", @OA\Schema(type="string"), required=false, description="每页显示的条数"),
     *     @OA\Parameter(name="page", in="query", @OA\Schema(type="string"), required=false, description="页码"),
     *     @OA\Parameter(name="token", in="query", @OA\Schema(type="string"), required=true, description="token"),
     *     @OA\Response(
     *      response="200",
     *      description="暂无"
     *     )
     * )
     */
    public function messageList()
    {
        $all = \request()->all();
        $messages = [
            'to_user_id.required' => '接收人必填',
            'user_id.required' => '接收人必填',
        ];
        $validator = Validator::make($all, [
            'user_id' => 'required',
            'to_user_id' => 'required'
        ], $messages);
        if ($validator->fails()) {
            return $this->fail([ResponseCode::ERROR_PARAMETER, implode(',', $validator->errors()->all())]);
        }
        // 获取会话id
        $dialogue = Dialogue::where(function ($query) use ($all) {
            $query->where('user_id', $all['user_id'])->where('to_user_id', $all['to_user_id']);
        })->orWhere(function ($query) use ($all) {
            $query->where('user_id', $all['to_user_id'])->where('to_user_id', $all['user_id']);
        })->first();
        if (empty($dialogue)) {
            return $this->fail([ResponseCode::ERROR_BUSINESS, '会话不存在']);
        }
        $message = Message::with([
            'user' => function ($query) {
                $query->select('id', 'nickname', 'name', 'headimgurl', 'username');
            },
            'toUser' => function ($query) {
                $query->select('id', 'nickname', 'name', 'headimgurl', 'username');
            }
        ])->where(function ($query) use ($dialogue) {
            $query->where('dialogue_id', $dialogue->id);
            if (request('supply_demand_id')) {
                $query->where('supply_demand_id', request('supply_demand_id'));
            }
        })->orderBy($all['sort_name'] ?? 'id', $all['sort_type'] ?? 'desc')
            ->paginate($all['page_size'] ?? 20);
        return $this->success(compact('message'));
    }

}