{
  "name": "Monthly Summary",
  "nodes": [
    {
      "parameters": {
        "rule": {
          "interval": [
            {
              "field": "cronExpression",
              "expression": "0 9 1 * *"
            }
          ]
        }
      },
      "type": "n8n-nodes-base.scheduleTrigger",
      "typeVersion": 1.2,
      "position": [
        -800,
        300
      ],
      "id": "schedule-trigger-monthly",
      "name": "Schedule Trigger"
    },
    {
      "parameters": {
        "jsCode": "const now = new Date();\nconst lastMonth = new Date(now.getFullYear(), now.getMonth() - 1, 1);\nconst yearMonth = `${lastMonth.getFullYear()}-${String(lastMonth.getMonth() + 1).padStart(2, '0')}`;\n\nreturn [{\n  json: {\n    year_month: yearMonth,\n    start_date: new Date(lastMonth.getFullYear(), lastMonth.getMonth(), 1).toISOString(),\n    end_date: new Date(lastMonth.getFullYear(), lastMonth.getMonth() + 1, 0, 23, 59, 59).toISOString()\n  }\n}];"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        -560,
        300
      ],
      "id": "calculate-last-month",
      "name": "Calculate Last Month"
    },
    {
      "parameters": {
        "documentId": {
          "__rl": true,
          "value": "YOUR_SPREADSHEET_ID",
          "mode": "id"
        },
        "sheetName": {
          "__rl": true,
          "value": "insights",
          "mode": "list",
          "cachedResultName": "insights"
        },
        "options": {
          "returnAll": true
        }
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        -320,
        300
      ],
      "id": "get-last-month-insights",
      "name": "Get Last Month Insights",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "YOUR_CREDENTIAL_ID",
          "name": "Google Sheets account"
        }
      }
    },
    {
      "parameters": {
        "jsCode": "const items = $('Get Last Month Insights').all();\nconst yearMonth = $('Calculate Last Month').item.json.year_month;\n\nreturn items.filter(item => {\n  const fetchedAt = new Date(item.json.fetched_at);\n  const itemYearMonth = `${fetchedAt.getFullYear()}-${String(fetchedAt.getMonth() + 1).padStart(2, '0')}`;\n  return itemYearMonth === yearMonth;\n});"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        -80,
        300
      ],
      "id": "filter-last-month-data",
      "name": "Filter Last Month Data"
    },
    {
      "parameters": {
        "jsCode": "const items = $input.all();\nconst yearMonth = $('Calculate Last Month').item.json.year_month;\n\nif (items.length === 0) {\n  return [{\n    json: {\n      year_month: yearMonth,\n      total_posts: 0,\n      total_reach: 0,\n      total_impressions: 0,\n      total_likes: 0,\n      total_comments: 0,\n      total_saved: 0,\n      avg_engagement_rate: 0,\n      follower_start: 0,\n      follower_end: 0,\n      follower_growth: 0,\n      growth_rate: 0\n    }\n  }];\n}\n\n// 日付順にソート\nconst sorted = items.sort((a, b) => new Date(a.json.fetched_at) - new Date(b.json.fetched_at));\n\n// 集計\nconst totalPosts = items.length;\nconst totalReach = items.reduce((sum, item) => sum + (parseInt(item.json.reach) || 0), 0);\nconst totalImpressions = items.reduce((sum, item) => sum + (parseInt(item.json.impressions) || 0), 0);\nconst totalLikes = items.reduce((sum, item) => sum + (parseInt(item.json.likes) || 0), 0);\nconst totalComments = items.reduce((sum, item) => sum + (parseInt(item.json.comments) || 0), 0);\nconst totalSaved = items.reduce((sum, item) => sum + (parseInt(item.json.saved) || 0), 0);\n\n// 平均エンゲージメント率\nconst avgEngagementRate = items.reduce((sum, item) => sum + parseFloat(item.json.engagement_rate || 0), 0) / totalPosts;\n\n// フォロワー推移\nconst followerStart = parseInt(sorted[0].json.follower_count) || 0;\nconst followerEnd = parseInt(sorted[sorted.length - 1].json.follower_count) || 0;\nconst followerGrowth = followerEnd - followerStart;\nconst growthRate = followerStart > 0 ? ((followerGrowth / followerStart) * 100).toFixed(2) : 0;\n\nreturn [{\n  json: {\n    year_month: yearMonth,\n    total_posts: totalPosts,\n    total_reach: totalReach,\n    total_impressions: totalImpressions,\n    total_likes: totalLikes,\n    total_comments: totalComments,\n    total_saved: totalSaved,\n    avg_engagement_rate: avgEngagementRate.toFixed(2),\n    follower_start: followerStart,\n    follower_end: followerEnd,\n    follower_growth: followerGrowth,\n    growth_rate: growthRate\n  }\n}];"
      },
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        160,
        300
      ],
      "id": "calculate-summary",
      "name": "Calculate Summary"
    },
    {
      "parameters": {
        "operation": "append",
        "documentId": {
          "__rl": true,
          "value": "YOUR_SPREADSHEET_ID",
          "mode": "id"
        },
        "sheetName": {
          "__rl": true,
          "value": "monthly_summary",
          "mode": "list",
          "cachedResultName": "monthly_summary"
        },
        "columns": {
          "mappingMode": "autoMapInputData",
          "value": {}
        },
        "options": {}
      },
      "type": "n8n-nodes-base.googleSheets",
      "typeVersion": 4.7,
      "position": [
        400,
        300
      ],
      "id": "append-summary-sheet",
      "name": "Append to Summary Sheet",
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "YOUR_CREDENTIAL_ID",
          "name": "Google Sheets account"
        }
      }
    }
  ],
  "pinData": {},
  "connections": {
    "Schedule Trigger": {
      "main": [
        [
          {
            "node": "Calculate Last Month",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Calculate Last Month": {
      "main": [
        [
          {
            "node": "Get Last Month Insights",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get Last Month Insights": {
      "main": [
        [
          {
            "node": "Filter Last Month Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Filter Last Month Data": {
      "main": [
        [
          {
            "node": "Calculate Summary",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Calculate Summary": {
      "main": [
        [
          {
            "node": "Append to Summary Sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {
    "executionOrder": "v1"
  },
  "meta": {
    "instanceId": ""
  },
  "id": "",
  "tags": []
}