// 坯布入库事务处理 Edge Function
// 确保 completed_quantity 和 inventory_records 数据一致性

import { createClient } from 'https://esm.sh/@supabase/supabase-js@2';

Deno.serve(async (req) => {
  // CORS 预检
  if (req.method === 'OPTIONS') {
    return new Response('ok', {
      headers: {
        'Access-Control-Allow-Origin': '*',
        'Access-Control-Allow-Methods': 'POST, OPTIONS',
        'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
      },
    });
  }

  const corsHeaders = {
    'Content-Type': 'application/json',
    'Access-Control-Allow-Origin': '*',
  };

  try {
    const body = await req.json();
    const {
      planId,
      quantity,
      rolls,
      warehouseId,
      warehouseLocation,
      operatorId,
      pricePerMeter,
    } = body;

    // 参数验证
    if (!planId || !quantity || quantity <= 0) {
      return new Response(
        JSON.stringify({ error: '缺少必要参数或数量无效' }),
        { status: 400, headers: corsHeaders }
      );
    }

    // 获取认证信息
    const authHeader = req.headers.get('Authorization') || '';

    // 创建管理员客户端（绕过 RLS）
    const supabaseAdmin = createClient(
      Deno.env.get('SUPABASE_URL')!,
      Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!,
    );

    // 开始事务处理
    // 1. 获取当前计划信息
    const { data: plan, error: planError } = await supabaseAdmin
      .from('production_plans')
      .select('completed_quantity, target_quantity, purchaser_id')
      .eq('id', planId)
      .maybeSingle();

    if (planError || !plan) {
      return new Response(
        JSON.stringify({ error: '获取计划信息失败: ' + (planError?.message || '计划不存在') }),
        { status: 404, headers: corsHeaders }
      );
    }

    // 2. 计算新的已完成数量
    const newCompletedQuantity = (plan.completed_quantity || 0) + quantity;

    // 3. 检查是否超过目标数量
    if (newCompletedQuantity > plan.target_quantity) {
      return new Response(
        JSON.stringify({ error: `入库数量超过剩余数量 (${plan.target_quantity - (plan.completed_quantity || 0)}米)` }),
        { status: 400, headers: corsHeaders }
      );
    }

    const now = new Date().toISOString();

    // 4. 更新计划的 completed_quantity
    const { error: updateError } = await supabaseAdmin
      .from('production_plans')
      .update({ completed_quantity: newCompletedQuantity })
      .eq('id', planId);

    if (updateError) {
      return new Response(
        JSON.stringify({ error: '更新计划数量失败: ' + updateError.message }),
        { status: 500, headers: corsHeaders }
      );
    }

    // 5. 创建入库记录
    const insertData: any = {
      plan_id: planId,
      quantity: quantity,
      rolls: rolls || 0,
      warehouse_location: warehouseLocation || '',
      operator_id: operatorId,
      price_per_meter: pricePerMeter || 0,
      created_at: now,
    };

    if (warehouseId) {
      insertData.warehouse_id = warehouseId;
    }

    const { data: inventoryRecord, error: insertError } = await supabaseAdmin
      .from('inventory_records')
      .insert(insertData)
      .select()
      .single();

    if (insertError) {
      // 如果入库记录创建失败，需要回滚 completed_quantity
      // 注意：这里简化处理，实际生产环境应使用数据库事务
      await supabaseAdmin
        .from('production_plans')
        .update({ completed_quantity: plan.completed_quantity })
        .eq('id', planId);

      return new Response(
        JSON.stringify({ error: '创建入库记录失败: ' + insertError.message }),
        { status: 500, headers: corsHeaders }
      );
    }

    // 6. 返回成功结果
    return new Response(
      JSON.stringify({
        success: true,
        data: {
          inventoryRecord,
          completedQuantity: newCompletedQuantity,
          progress: Math.round((newCompletedQuantity / plan.target_quantity) * 100),
        },
      }),
      { headers: corsHeaders }
    );

  } catch (error) {
    const message = error instanceof Error ? error.message : 'Unknown error';
    return new Response(
      JSON.stringify({ error: '服务器错误: ' + message }),
      { status: 500, headers: corsHeaders }
    );
  }
});