{
  "name": "75 Cost report + what-if (answer)",
  "nodes": [
    {
      "name": "Report webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "parameters": {
        "httpMethod": "POST",
        "path": "my-cost-report",
        "responseMode": "responseNode",
        "options": {}
      },
      "position": [
        0,
        300
      ],
      "id": "45dddbe3-765d-5071-8c44-f1406634465b",
      "webhookId": "49a4308f-5df9-5973-963a-3d7f6bbeb9b7"
    },
    {
      "name": "Get summary",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "url": "http://data-api:8800/usage/summary",
        "options": {}
      },
      "position": [
        220,
        300
      ],
      "id": "cf6e061b-9073-57ea-a564-1769eec23afd"
    },
    {
      "name": "Get budget",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "url": "http://data-api:8800/budget",
        "options": {}
      },
      "position": [
        440,
        300
      ],
      "id": "fb9bdc4e-453a-5261-9b27-f913533bebb5"
    },
    {
      "name": "Get prices",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "parameters": {
        "url": "http://data-api:8800/prices",
        "options": {}
      },
      "position": [
        660,
        300
      ],
      "id": "c0db1fd8-4b10-5824-a526-85ebbd70230a"
    },
    {
      "name": "Make report",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "parameters": {
        "jsCode": "const s = $('Get summary').first().json;\nconst b = $('Get budget').first().json;\nconst body = $('Report webhook').first().json.body ?? {};\nconst perDay = Number(body.requests_per_day ?? s.requests);\nconst workdays = Number(body.workdays ?? 22);\nconst avg = s.requests ? s.cost_usd / s.requests : 0;\nconst round = (v) => Math.round(v * 1e6) / 1e6;\nconst users = Object.entries(s.by_user).sort((a, b2) => b2[1].cost_usd - a[1].cost_usd);\nconst models = Object.fromEntries(Object.entries(s.by_model).map(([k, v]) => [k, round(v.cost_usd)]));\nconst result = { requests: s.requests, calls: s.calls, cost_usd: round(s.cost_usd), avg_usd: round(avg),\n  by_model: models, top_user: users.length ? users[0][0] : null,\n  projected_month_usd: round(avg * perDay * workdays), daily_budget_usd: b.daily_usd, remaining_usd: round(b.remaining_usd), over_budget: b.over };\nconst target = body.what_if_model;\nif (target) {\n  const prices = $('Get prices').first().json.models;\n  const p = prices[target];\n  if (!p) return [{ json: { error: 'unknown model', model: target, known: Object.keys(prices) } }];\n  const rows = Object.values(s.by_model);\n  const tokensIn = rows.reduce((sum, r) => sum + r.prompt_tokens, 0);\n  const tokensOut = rows.reduce((sum, r) => sum + r.completion_tokens, 0);\n  const cost = (tokensIn * p.input + tokensOut * p.output) / 1e6;\n  result.what_if = { model: target, cost_usd: round(cost), saving_usd: round(s.cost_usd - cost),\n    projected_month_usd: round((s.requests ? cost / s.requests : 0) * perDay * workdays) };\n}\nreturn [{ json: result }];"
      },
      "position": [
        880,
        300
      ],
      "id": "ee73c6a8-12a8-57fc-ab34-81fd258667cc"
    },
    {
      "name": "Known model?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "loose",
            "version": 2
          },
          "conditions": [
            {
              "id": "c1",
              "leftValue": "={{ $json.error ?? '' }}",
              "rightValue": "unknown model",
              "operator": {
                "type": "string",
                "operation": "notEquals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "position": [
        1100,
        300
      ],
      "id": "4ba2d3fa-9968-50d3-a29c-4c19ef3f7592"
    },
    {
      "name": "Send report",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ $json }}",
        "options": {}
      },
      "position": [
        1320,
        300
      ],
      "id": "c124f9d7-3b8c-5134-8343-936873621946"
    },
    {
      "name": "Reject model",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ $json }}",
        "options": {
          "responseCode": 400
        }
      },
      "position": [
        1320,
        520
      ],
      "id": "95cf4c50-09ed-52f3-81e5-bfd72d87904b"
    }
  ],
  "connections": {
    "Report webhook": {
      "main": [
        [
          {
            "node": "Get summary",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get summary": {
      "main": [
        [
          {
            "node": "Get budget",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get budget": {
      "main": [
        [
          {
            "node": "Get prices",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get prices": {
      "main": [
        [
          {
            "node": "Make report",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Make report": {
      "main": [
        [
          {
            "node": "Known model?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Known model?": {
      "main": [
        [
          {
            "node": "Send report",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Reject model",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  }
}