openapi: 3.1.0
info:
    title: ClimateService API
    version: 1.0.0
paths:
    /api/climate/v1/list-climate-anomalies:
        get:
            tags:
                - ClimateService
            summary: ListClimateAnomalies
            description: ListClimateAnomalies retrieves temperature and precipitation anomalies from ERA5 data.
            operationId: ListClimateAnomalies
            parameters:
                - name: page_size
                  in: query
                  description: Maximum items per page (1-100).
                  required: false
                  schema:
                    type: integer
                    format: int32
                - name: cursor
                  in: query
                  description: Cursor for next page.
                  required: false
                  schema:
                    type: string
                - name: min_severity
                  in: query
                  description: Optional filter by anomaly severity.
                  required: false
                  schema:
                    type: string
            responses:
                "200":
                    description: Successful response
                    content:
                        application/json:
                            schema:
                                $ref: '#/components/schemas/ListClimateAnomaliesResponse'
                "400":
                    description: Validation error
                    content:
                        application/json:
                            schema:
                                $ref: '#/components/schemas/ValidationError'
                default:
                    description: Error response
                    content:
                        application/json:
                            schema:
                                $ref: '#/components/schemas/Error'
components:
    schemas:
        Error:
            type: object
            properties:
                message:
                    type: string
                    description: Error message (e.g., 'user not found', 'database connection failed')
            description: Error is returned when a handler encounters an error. It contains a simple error message that the developer can customize.
        FieldViolation:
            type: object
            properties:
                field:
                    type: string
                    description: The field path that failed validation (e.g., 'user.email' for nested fields). For header validation, this will be the header name (e.g., 'X-API-Key')
                description:
                    type: string
                    description: Human-readable description of the validation violation (e.g., 'must be a valid email address', 'required field missing')
            required:
                - field
                - description
            description: FieldViolation describes a single validation error for a specific field.
        ValidationError:
            type: object
            properties:
                violations:
                    type: array
                    items:
                        $ref: '#/components/schemas/FieldViolation'
                    description: List of validation violations
            required:
                - violations
            description: ValidationError is returned when request validation fails. It contains a list of field violations describing what went wrong.
        ListClimateAnomaliesRequest:
            type: object
            properties:
                pageSize:
                    type: integer
                    format: int32
                    description: Maximum items per page (1-100).
                cursor:
                    type: string
                    description: Cursor for next page.
                minSeverity:
                    type: string
                    enum:
                        - ANOMALY_SEVERITY_UNSPECIFIED
                        - ANOMALY_SEVERITY_NORMAL
                        - ANOMALY_SEVERITY_MODERATE
                        - ANOMALY_SEVERITY_EXTREME
                    description: |-
                        AnomalySeverity represents the severity of a climate anomaly.
                         Maps to existing TS union: 'normal' | 'moderate' | 'extreme'.
            description: ListClimateAnomaliesRequest specifies filters for retrieving climate anomaly data.
        ListClimateAnomaliesResponse:
            type: object
            properties:
                anomalies:
                    type: array
                    items:
                        $ref: '#/components/schemas/ClimateAnomaly'
                pagination:
                    $ref: '#/components/schemas/PaginationResponse'
            description: ListClimateAnomaliesResponse contains the list of climate anomalies.
        ClimateAnomaly:
            type: object
            properties:
                zone:
                    type: string
                    minLength: 1
                    description: Climate zone name (e.g., "Northern Europe", "Sahel").
                location:
                    $ref: '#/components/schemas/GeoCoordinates'
                tempDelta:
                    type: number
                    format: double
                    description: Temperature deviation from normal in degrees Celsius.
                precipDelta:
                    type: number
                    format: double
                    description: Precipitation deviation from normal as a percentage.
                severity:
                    type: string
                    enum:
                        - ANOMALY_SEVERITY_UNSPECIFIED
                        - ANOMALY_SEVERITY_NORMAL
                        - ANOMALY_SEVERITY_MODERATE
                        - ANOMALY_SEVERITY_EXTREME
                    description: |-
                        AnomalySeverity represents the severity of a climate anomaly.
                         Maps to existing TS union: 'normal' | 'moderate' | 'extreme'.
                type:
                    type: string
                    enum:
                        - ANOMALY_TYPE_UNSPECIFIED
                        - ANOMALY_TYPE_WARM
                        - ANOMALY_TYPE_COLD
                        - ANOMALY_TYPE_WET
                        - ANOMALY_TYPE_DRY
                        - ANOMALY_TYPE_MIXED
                    description: |-
                        AnomalyType represents the type of climate anomaly.
                         Maps to existing TS union: 'warm' | 'cold' | 'wet' | 'dry' | 'mixed'.
                period:
                    type: string
                    minLength: 1
                    description: Time period covered (e.g., "2024-W03", "2024-01").
            required:
                - zone
                - period
            description: |-
                ClimateAnomaly represents a temperature or precipitation deviation from historical norms.
                 Sourced from Open-Meteo / ERA5 reanalysis data.
        GeoCoordinates:
            type: object
            properties:
                latitude:
                    type: number
                    maximum: 90
                    minimum: -90
                    format: double
                    description: Latitude in decimal degrees (-90 to 90).
                longitude:
                    type: number
                    maximum: 180
                    minimum: -180
                    format: double
                    description: Longitude in decimal degrees (-180 to 180).
            description: GeoCoordinates represents a geographic location using WGS84 coordinates.
        PaginationResponse:
            type: object
            properties:
                nextCursor:
                    type: string
                    description: Cursor for fetching the next page. Empty string indicates no more pages.
                totalCount:
                    type: integer
                    format: int32
                    description: Total count of items matching the query, if known. Zero if the total is unknown.
            description: PaginationResponse contains pagination metadata returned alongside list results.