{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "PRD Template Variables v2.0",
  "description": "Schema for Product Requirements Document template variables with conditional validation",
  "type": "object",
  "required": [
    "projectName",
    "productName",
    "author",
    "problemStatement",
    "goals",
    "userStories",
    "functionalRequirements",
    "nonFunctionalRequirements",
    "successMetrics",
    "milestones",
    "risks"
  ],
  "properties": {
    "projectName": {
      "type": "string",
      "minLength": 1,
      "description": "Name of the project"
    },
    "productName": {
      "type": "string",
      "minLength": 1,
      "description": "Name of the product"
    },
    "version": {
      "type": "string",
      "pattern": "^\\d+\\.\\d+\\.\\d+$",
      "default": "1.0.0",
      "description": "Document version in semver format"
    },
    "author": {
      "type": "string",
      "minLength": 1,
      "description": "Document author"
    },
    "problemStatement": {
      "type": "string",
      "minLength": 50,
      "description": "Description of the problem being solved (minimum 50 characters)"
    },
    "goals": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "string",
        "minLength": 1
      },
      "description": "Product/feature goals"
    },
    "userStories": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["title", "actor", "action", "benefit"],
        "properties": {
          "title": {
            "type": "string",
            "minLength": 1,
            "description": "User story title"
          },
          "actor": {
            "type": "string",
            "minLength": 1,
            "description": "The user persona"
          },
          "action": {
            "type": "string",
            "minLength": 1,
            "description": "What the user wants to do"
          },
          "benefit": {
            "type": "string",
            "minLength": 1,
            "description": "The benefit to the user"
          },
          "criteria": {
            "type": "array",
            "items": {
              "type": "string"
            },
            "description": "Acceptance criteria"
          }
        }
      },
      "description": "User stories in As a/I want/So that format"
    },
    "functionalRequirements": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["title", "description", "priority"],
        "properties": {
          "title": {
            "type": "string",
            "minLength": 1,
            "description": "Requirement title"
          },
          "description": {
            "type": "string",
            "minLength": 1,
            "description": "Detailed requirement description"
          },
          "priority": {
            "type": "string",
            "enum": ["P0", "P1", "P2", "P3"],
            "description": "Priority level (P0=Critical, P3=Low)"
          }
        }
      },
      "description": "Functional requirements with priorities"
    },
    "nonFunctionalRequirements": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["category", "requirement"],
        "properties": {
          "category": {
            "type": "string",
            "minLength": 1,
            "description": "NFR category (Performance, Security, etc.)"
          },
          "requirement": {
            "type": "string",
            "minLength": 1,
            "description": "The requirement specification"
          }
        }
      },
      "description": "Non-functional requirements"
    },
    "successMetrics": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["metric", "target", "method"],
        "properties": {
          "metric": {
            "type": "string",
            "minLength": 1,
            "description": "Metric name"
          },
          "target": {
            "type": "string",
            "minLength": 1,
            "description": "Target value"
          },
          "method": {
            "type": "string",
            "minLength": 1,
            "description": "Measurement method"
          }
        }
      },
      "description": "Success metrics with targets"
    },
    "milestones": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["name", "date"],
        "properties": {
          "name": {
            "type": "string",
            "minLength": 1,
            "description": "Milestone name"
          },
          "date": {
            "type": "string",
            "minLength": 1,
            "description": "Target date"
          }
        }
      },
      "description": "Project milestones"
    },
    "risks": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["risk", "impact", "probability", "mitigation"],
        "properties": {
          "risk": {
            "type": "string",
            "minLength": 1,
            "description": "Risk description"
          },
          "impact": {
            "type": "string",
            "enum": ["Low", "Medium", "High", "Critical"],
            "description": "Impact level"
          },
          "probability": {
            "type": "string",
            "enum": ["Low", "Medium", "High"],
            "description": "Probability level"
          },
          "mitigation": {
            "type": "string",
            "minLength": 1,
            "description": "Mitigation strategy"
          }
        }
      },
      "description": "Identified risks and mitigations"
    },
    "includeUIUX": {
      "type": "boolean",
      "default": false,
      "description": "Whether to include UI/UX section"
    },
    "isBrownfield": {
      "type": "boolean",
      "default": false,
      "description": "Whether this is a brownfield (existing system) project"
    },
    "userFlows": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "User flows (required when includeUIUX is true)"
    },
    "designConsiderations": {
      "type": "string",
      "description": "Design considerations (required when includeUIUX is true)"
    },
    "existingSystemAnalysis": {
      "type": "string",
      "description": "Analysis of existing system (required when isBrownfield is true)"
    },
    "integrationPoints": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Integration points (required when isBrownfield is true)"
    },
    "migrationStrategy": {
      "type": "string",
      "description": "Migration strategy (required when isBrownfield is true)"
    }
  },
  "allOf": [
    {
      "if": {
        "properties": {
          "includeUIUX": {
            "const": true
          }
        }
      },
      "then": {
        "required": ["userFlows", "designConsiderations"],
        "properties": {
          "userFlows": {
            "minItems": 1
          },
          "designConsiderations": {
            "minLength": 20
          }
        }
      }
    },
    {
      "if": {
        "properties": {
          "isBrownfield": {
            "const": true
          }
        }
      },
      "then": {
        "required": ["existingSystemAnalysis", "integrationPoints", "migrationStrategy"],
        "properties": {
          "existingSystemAnalysis": {
            "minLength": 50
          },
          "integrationPoints": {
            "minItems": 1
          },
          "migrationStrategy": {
            "minLength": 50
          }
        }
      }
    }
  ]
}