{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/Abdess/retrobios/schemas/platform.schema.json",
  "title": "Platform Configuration",
  "description": "Schema for retrogaming platform BIOS configuration files",
  "type": "object",
  "required": ["platform"],
  "properties": {
    "inherits": {
      "type": "string",
      "description": "Parent platform config to inherit from (e.g., 'retroarch')"
    },
    "platform": {
      "type": "string",
      "description": "Platform display name"
    },
    "version": {
      "type": "string",
      "description": "Platform version"
    },
    "homepage": {
      "type": "string",
      "format": "uri",
      "description": "Platform homepage URL"
    },
    "source": {
      "type": "string",
      "description": "URL to source BIOS requirements list"
    },
    "base_destination": {
      "type": "string",
      "description": "Base directory for BIOS files on this platform"
    },
    "hash_type": {
      "type": "string",
      "enum": ["sha1", "md5", "crc32", "sha256"],
      "description": "Primary hash algorithm used by this platform"
    },
    "verification_mode": {
      "type": "string",
      "enum": ["existence", "md5", "sha1"],
      "default": "existence",
      "description": "How the platform verifies BIOS at runtime: existence (file exists), md5 (checks MD5 hash), sha1 (checks SHA1 hash)"
    },
    "systems": {
      "type": "object",
      "description": "Systems/consoles supported by this platform",
      "additionalProperties": {
        "$ref": "#/$defs/system"
      }
    },
    "overrides": {
      "type": "object",
      "description": "Override inherited system configs",
      "properties": {
        "systems": {
          "type": "object",
          "additionalProperties": {
            "$ref": "#/$defs/system"
          }
        }
      }
    }
  },
  "$defs": {
    "system": {
      "type": "object",
      "properties": {
        "core": {
          "type": "string",
          "description": "Emulator core name"
        },
        "manufacturer": {
          "type": "string",
          "description": "Hardware manufacturer"
        },
        "dat_version": {
          "type": "string",
          "description": "Version of the DAT file used as source for BIOS hashes"
        },
        "source": {
          "type": "string",
          "description": "URL or reference to the source of BIOS requirements"
        },
        "release_year": {
          "type": "integer",
          "minimum": 1970,
          "maximum": 2030,
          "description": "Console release year"
        },
        "docs": {
          "type": "string",
          "format": "uri",
          "description": "Documentation URL"
        },
        "includes": {
          "type": "array",
          "items": { "type": "string" },
          "description": "Shared BIOS groups to include (from _shared.yml)"
        },
        "files": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/bios_file"
          },
          "description": "BIOS files required for this system"
        }
      }
    },
    "bios_file": {
      "type": "object",
      "required": ["name", "destination"],
      "properties": {
        "name": {
          "type": "string",
          "description": "BIOS filename"
        },
        "sha1": {
          "type": "string",
          "pattern": "^[a-f0-9]{40}$",
          "description": "SHA1 hash"
        },
        "md5": {
          "type": "string",
          "pattern": "^[a-fA-F0-9]{32}(,[a-fA-F0-9]{32})*$",
          "description": "MD5 hash (comma-separated for multi-hash)"
        },
        "sha256": {
          "type": "string",
          "pattern": "^[a-f0-9]{64}$",
          "description": "SHA256 hash"
        },
        "crc32": {
          "type": "string",
          "pattern": "^[a-f0-9A-F0-9]{8}$",
          "description": "CRC32 hash"
        },
        "size": {
          "type": "integer",
          "minimum": 0,
          "description": "File size in bytes"
        },
        "destination": {
          "type": "string",
          "description": "Destination path relative to base_destination"
        },
        "required": {
          "type": "boolean",
          "default": true,
          "description": "Whether this BIOS is required for the core to function"
        },
        "extract": {
          "type": "boolean",
          "default": false,
          "description": "Extract ZIP contents instead of copying the ZIP"
        },
        "storage": {
          "type": "string",
          "enum": ["embedded", "external", "user_provided"],
          "default": "embedded",
          "description": "Storage tier: embedded (in repo), external (download at build), user_provided (manual)"
        },
        "source_url": {
          "type": "string",
          "format": "uri",
          "description": "Download URL for external storage tier"
        },
        "instructions": {
          "type": "string",
          "description": "Human-readable instructions (for user_provided or context)"
        },
        "zipped_file": {
          "type": "string",
          "description": "If set, the MD5 hash refers to this file inside the ZIP, not the ZIP itself"
        }
      }
    }
  }
}