# Phase 1: JSON Schema仕様策定

## レイヤー間データフロー

```
PHY (物理配置) → IDX (キー識別) → ELC (電気配線) + MAP (キーマップ)
                                      ↓                    ↓
                               ファームウェア生成    VIA/Remap出力
```

## 1. PHYレイヤー JSON Schema

座標・回転・サイズの意味は `PHYレイヤー.md` を正とする。

### 基本構造

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beyond-kle.org/schemas/phy-layer.json",
  "title": "PHY Layer - Physical Key Layout",
  "description": "Physical positioning and sizing of keys",
  "type": "object",
  "required": ["version", "metadata", "profiles", "root"],
  "properties": {
    "version": {
      "type": "string",
      "pattern": "^\\d+\\.\\d+\\.\\d+$",
      "description": "Schema version (semver)"
    },
    "metadata": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "author": { "type": "string" },
        "description": { "type": "string" },
        "created": { "type": "string", "format": "date-time" },
        "modified": { "type": "string", "format": "date-time" }
      }
    },
    "compatibility": {
      "type": "object",
      "description": "Information for external tool compatibility",
      "properties": {
        "kleJson": {
          "type": "object",
          "properties": {
            "source": { "type": "string" },
            "checksum": { "type": "string" },
            "preservedFields": { "type": "array", "items": { "type": "string" } }
          }
        },
        "originalFormat": {
          "type": "string",
          "enum": ["kle", "via", "qmk", "native"]
        }
      }
    },
    "profiles": {
      "type": "array",
      "minItems": 1,
      "items": {
        "$ref": "#/$defs/profile"
      }
    },
    "root": {
      "type": "array",
      "items": {
        "oneOf": [
          { "$ref": "#/$defs/key" },
          { "$ref": "#/$defs/cluster" }
        ]
      }
    }
  },
  "$defs": {
    "transform": {
      "type": "object",
      "description": "Placement relative to the parent: rotate by rotation around the local origin, then translate by (x, y)",
      "required": ["x", "y", "rotation"],
      "properties": {
        "x": { "type": "number" },
        "y": { "type": "number" },
        "rotation": { "type": "number", "description": "Degrees" }
      }
    },
    "profile": {
      "type": "object",
      "required": ["id", "name", "unitSize"],
      "properties": {
        "id": { "type": "string" },
        "name": { "type": "string" },
        "unitSize": {
          "type": "object",
          "required": ["x", "y"],
          "properties": {
            "x": { "type": "number", "minimum": 0 },
            "y": { "type": "number", "minimum": 0 }
          }
        },
        "visualOffset": {
          "type": "object",
          "properties": {
            "x": { "type": "number" },
            "y": { "type": "number" },
            "radius": { "type": "number", "minimum": 0 }
          }
        }
      }
    },
    "key": {
      "type": "object",
      "required": ["type", "id", "profile", "transform", "size"],
      "properties": {
        "type": {
          "type": "string",
          "const": "key"
        },
        "id": {
          "type": "string",
          "description": "Unique key identifier"
        },
        "profile": {
          "type": "string",
          "description": "Reference to profile ID"
        },
        "transform": { "$ref": "#/$defs/transform" },
        "size": {
          "type": "object",
          "description": "Local size. Not affected by the parent transform",
          "required": ["w", "h"],
          "properties": {
            "w": { "type": "number", "minimum": 0 },
            "h": { "type": "number", "minimum": 0 }
          }
        },
        "metadata": {
          "type": "object",
          "properties": {
            "label": { "type": "string" },
            "color": { "type": "string" },
            "textColor": { "type": "string" },
            "kleCompatibility": {
              "type": "object",
              "description": "Original KLE fields for round-trip compatibility",
              "properties": {
                "labels": { "type": "array", "items": { "type": "string" } },
                "textSizes": { "type": "array", "items": { "type": "number" } },
                "decalData": { "type": "object" }
              }
            }
          }
        }
      }
    },
    "cluster": {
      "type": "object",
      "required": ["type", "id", "name", "transform", "children"],
      "properties": {
        "type": {
          "type": "string",
          "const": "cluster"
        },
        "id": { "type": "string" },
        "name": { "type": "string" },
        "transform": { "$ref": "#/$defs/transform" },
        "children": {
          "type": "array",
          "items": {
            "oneOf": [
              { "$ref": "#/$defs/key" },
              { "$ref": "#/$defs/cluster" }
            ]
          }
        }
      }
    }
  }
}
```

### 使用例

```json
{
  "version": "1.0.0",
  "metadata": {
    "name": "Split Keyboard Layout",
    "author": "John Doe",
    "description": "Ergonomic split keyboard with rotated thumb clusters",
    "created": "2025-01-01T00:00:00Z"
  },
  "profiles": [
    {
      "id": "standard",
      "name": "Standard Cherry MX",
      "unitSize": { "x": 19.05, "y": 19.05 },
      "visualOffset": { "x": 1, "y": 1, "radius": 1 }
    }
  ],
  "root": [
    {
      "type": "cluster",
      "id": "left_main",
      "name": "Left Main Block",
      "transform": { "x": 0, "y": 0, "rotation": 0 },
      "children": [
        {
          "type": "key",
          "id": "k00",
          "profile": "standard",
          "transform": { "x": 0, "y": 0, "rotation": 0 },
          "size": { "w": 1, "h": 1 },
          "metadata": { "label": "Q" }
        },
        {
          "type": "key", 
          "id": "k01",
          "profile": "standard",
          "transform": { "x": 1, "y": 0, "rotation": 0 },
          "size": { "w": 1, "h": 1 },
          "metadata": { "label": "W" }
        }
      ]
    },
    {
      "type": "cluster",
      "id": "left_thumb",
      "name": "Left Thumb Cluster", 
      "transform": { "x": 2, "y": 3, "rotation": 15 },
      "children": [
        {
          "type": "key",
          "id": "k30",
          "profile": "standard",
          "transform": { "x": 0, "y": 0, "rotation": 0 },
          "size": { "w": 1.25, "h": 1 },
          "metadata": { "label": "Space" }
        },
        {
          "type": "key",
          "id": "k31", 
          "profile": "standard",
          "transform": { "x": 1.25, "y": 0, "rotation": 0 },
          "size": { "w": 1, "h": 1 },
          "metadata": { "label": "Enter" }
        }
      ]
    }
  ]
}
```

## 2. IDXレイヤー JSON Schema

### 基本構造

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beyond-kle.org/schemas/idx-layer.json",
  "title": "IDX Layer - Key Identification",
  "description": "Mapping between physical keys and logical identifiers",
  "type": "object",
  "required": ["version", "phyReference", "keyMap"],
  "properties": {
    "version": { "type": "string" },
    "phyReference": {
      "type": "object",
      "required": ["source", "checksum"],
      "properties": {
        "source": { "type": "string" },
        "checksum": { "type": "string" }
      }
    },
    "keyMap": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/keyMapping"
      }
    }
  },
  "$defs": {
    "keyMapping": {
      "type": "object",
      "required": ["physicalId", "logicalId"],
      "properties": {
        "physicalId": {
          "type": "string",
          "description": "Reference to PHY layer key ID"
        },
        "logicalId": {
          "type": "object",
          "required": ["index"],
          "properties": {
            "index": { "type": "integer", "minimum": 0 },
            "matrix": {
              "type": "object",
              "properties": {
                "row": { "type": "integer", "minimum": 0 },
                "col": { "type": "integer", "minimum": 0 }
              }
            },
            "label": { "type": "string" }
          }
        }
      }
    }
  }
}
```

## 3. ELCレイヤー JSON Schema

### 基本構造

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beyond-kle.org/schemas/elc-layer.json",
  "title": "ELC Layer - Electrical Configuration",
  "description": "Electrical wiring and pin mapping",
  "type": "object",
  "required": ["version", "idxReference", "microcontroller", "matrix"],
  "properties": {
    "version": { "type": "string" },
    "idxReference": {
      "type": "object",
      "required": ["source", "checksum"],
      "properties": {
        "source": { "type": "string" },
        "checksum": { "type": "string" }
      }
    },
    "microcontroller": {
      "type": "object",
      "required": ["type", "pinMapping"],
      "properties": {
        "type": { "type": "string" },
        "pinMapping": {
          "type": "object",
          "properties": {
            "rows": {
              "type": "array",
              "items": { "type": "string" }
            },
            "cols": {
              "type": "array", 
              "items": { "type": "string" }
            }
          }
        }
      }
    },
    "matrix": {
      "type": "object",
      "required": ["type", "dimensions"],
      "properties": {
        "type": {
          "type": "string",
          "enum": ["standard", "charlieplexing", "direct"]
        },
        "dimensions": {
          "type": "object",
          "required": ["rows", "cols"],
          "properties": {
            "rows": { "type": "integer", "minimum": 1 },
            "cols": { "type": "integer", "minimum": 1 }
          }
        }
      }
    }
  }
}
```

## 4. MAPレイヤー JSON Schema

### 基本構造

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://beyond-kle.org/schemas/map-layer.json", 
  "title": "MAP Layer - Keymap Configuration",
  "description": "Key code assignments and layers",
  "type": "object",
  "required": ["version", "idxReference", "layers"],
  "properties": {
    "version": { "type": "string" },
    "idxReference": {
      "type": "object",
      "required": ["source", "checksum"],
      "properties": {
        "source": { "type": "string" },
        "checksum": { "type": "string" }
      }
    },
    "layers": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/layer"
      }
    }
  },
  "$defs": {
    "layer": {
      "type": "object",
      "required": ["id", "name", "keymap"],
      "properties": {
        "id": { "type": "integer", "minimum": 0 },
        "name": { "type": "string" },
        "keymap": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/keyAssignment"
          }
        }
      }
    },
    "keyAssignment": {
      "type": "object",
      "required": ["keyIndex", "keycode"],
      "properties": {
        "keyIndex": { "type": "integer" },
        "keycode": { "type": "string" }
      }
    }
  }
}
```

## 変換フロー設計

### PHY → IDX変換

1. PHYレイヤーから物理キーリストを取得
2. 各キーに論理IDを割り当て
3. マトリックス座標の自動生成（行列最適化）

### IDX → ELC変換

1. マトリックス次元を算出
2. ピン配置の最適化提案
3. 配線効率の検証

### IDX + ELC → MAP変換

1. キーインデックス配列の生成
2. デフォルトキーマップの提案
3. VIA/QMK形式への出力

## 次のステップ

1. **TypeScriptでの型定義作成**
2. **変換ロジックのプロトタイプ実装**
3. **テストケース（60%、Split等）での検証**
4. **既存KLE JSONからの変換機能**