{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://github.com/bincio-activity/bincio/blob/main/schema/bas-v1.schema.json",
  "title": "BincioActivity Schema v1.0",
  "description": "Schema for BincioActivity (BAS) data files.",
  "$defs": {
    "sport": {
      "type": "string",
      "enum": ["cycling", "running", "hiking", "walking", "swimming", "skiing", "other"]
    },
    "sub_sport": {
      "type": ["string", "null"],
      "enum": ["road", "mountain", "gravel", "indoor", "trail", "track", "nordic", "alpine", "open_water", "pool", null]
    },
    "privacy": {
      "type": "string",
      "enum": ["public", "blur_start", "no_gps", "private"]
    },
    "source": {
      "type": ["string", "null"],
      "enum": [
        "strava_export", "garmin_connect", "wahoo", "komoot",
        "gpx_file", "fit_file", "tcx_file", "karoo", "manual", null
      ]
    },
    "latlng": {
      "type": ["array", "null"],
      "items": { "type": "number" },
      "minItems": 2,
      "maxItems": 2
    },
    "bbox": {
      "type": ["array", "null"],
      "items": { "type": "number" },
      "minItems": 4,
      "maxItems": 4,
      "description": "[min_lon, min_lat, max_lon, max_lat]"
    },
    "mmp": {
      "type": ["array", "null"],
      "description": "Mean Maximal Power curve — [[duration_s, avg_watts], ...]",
      "items": {
        "type": "array",
        "items": { "type": "integer" },
        "minItems": 2,
        "maxItems": 2
      }
    },
    "best_efforts": {
      "type": ["array", "null"],
      "description": "Best efforts by distance — [[distance_km, time_s], ...]",
      "items": {
        "type": "array",
        "items": { "type": "number" },
        "minItems": 2,
        "maxItems": 2
      }
    },
    "lap": {
      "type": "object",
      "required": ["index", "started_at", "duration_s"],
      "properties": {
        "index":            { "type": "integer", "minimum": 0 },
        "started_at":       { "type": "string", "format": "date-time" },
        "duration_s":       { "type": ["integer", "null"] },
        "distance_m":       { "type": ["number", "null"] },
        "elevation_gain_m": { "type": ["number", "null"] },
        "avg_speed_kmh":    { "type": ["number", "null"] },
        "avg_hr_bpm":       { "type": ["integer", "null"] },
        "avg_power_w":      { "type": ["integer", "null"] }
      },
      "additionalProperties": false
    },
    "timeseries": {
      "type": "object",
      "required": ["t"],
      "properties": {
        "t":             { "type": "array", "items": { "type": "integer" } },
        "lat":           { "type": ["array", "null"], "items": { "type": ["number", "null"] } },
        "lon":           { "type": ["array", "null"], "items": { "type": ["number", "null"] } },
        "elevation_m":   { "type": "array", "items": { "type": ["number", "null"] } },
        "speed_kmh":     { "type": "array", "items": { "type": ["number", "null"] } },
        "hr_bpm":        { "type": "array", "items": { "type": ["integer", "null"] } },
        "cadence_rpm":   { "type": "array", "items": { "type": ["integer", "null"] } },
        "power_w":       { "type": "array", "items": { "type": ["integer", "null"] } },
        "temperature_c": { "type": "array", "items": { "type": ["number", "null"] } }
      },
      "additionalProperties": false
    },
    "activity_summary": {
      "type": "object",
      "required": ["id", "title", "sport", "started_at", "privacy"],
      "properties": {
        "id":                { "type": "string", "minLength": 1 },
        "title":             { "type": "string" },
        "sport":             { "$ref": "#/$defs/sport" },
        "sub_sport":         { "$ref": "#/$defs/sub_sport" },
        "started_at":        { "type": "string", "format": "date-time" },
        "distance_m":        { "type": ["number", "null"] },
        "duration_s":        { "type": ["integer", "null"] },
        "moving_time_s":     { "type": ["integer", "null"] },
        "elevation_gain_m":  { "type": ["number", "null"] },
        "avg_speed_kmh":     { "type": ["number", "null"] },
        "max_speed_kmh":     { "type": ["number", "null"] },
        "avg_hr_bpm":        { "type": ["integer", "null"] },
        "max_hr_bpm":        { "type": ["integer", "null"] },
        "avg_cadence_rpm":   { "type": ["integer", "null"] },
        "avg_power_w":       { "type": ["integer", "null"] },
        "mmp":               { "$ref": "#/$defs/mmp" },
        "best_efforts":      { "$ref": "#/$defs/best_efforts" },
        "best_climb_m":      { "type": ["number", "null"] },
        "source":            { "$ref": "#/$defs/source" },
        "privacy":           { "$ref": "#/$defs/privacy" },
        "detail_url":        { "type": ["string", "null"] },
        "track_url":         { "type": ["string", "null"] },
        "preview_coords": {
          "type": ["array", "null"],
          "description": "Simplified track preview — [[lon, lat], ...] for card thumbnails",
          "items": {
            "type": "array",
            "items": { "type": "number" },
            "minItems": 2,
            "maxItems": 2
          }
        },
        "custom":            { "type": "object" }
      },
      "additionalProperties": false
    }
  },
  "oneOf": [
    {
      "title": "index.json",
      "type": "object",
      "required": ["bas_version", "owner", "generated_at", "activities"],
      "properties": {
        "bas_version":   { "type": "string", "const": "1.0" },
        "owner": {
          "type": "object",
          "required": ["handle", "display_name"],
          "properties": {
            "handle":       { "type": "string", "minLength": 1 },
            "display_name": { "type": "string" },
            "avatar_url":   { "type": ["string", "null"] }
          },
          "additionalProperties": false
        },
        "generated_at": { "type": "string", "format": "date-time" },
        "shards": {
          "type": "array",
          "items": {
            "type": "object",
            "required": ["year", "url", "count"],
            "properties": {
              "year":  { "type": "integer" },
              "url":   { "type": "string" },
              "count": { "type": "integer" }
            },
            "additionalProperties": false
          }
        },
        "activities": {
          "type": "array",
          "items": { "$ref": "#/$defs/activity_summary" }
        }
      },
      "additionalProperties": false
    },
    {
      "title": "activities/{id}.json",
      "type": "object",
      "required": [
        "bas_version", "id", "title", "sport", "started_at",
        "privacy", "laps", "timeseries", "custom"
      ],
      "properties": {
        "bas_version":       { "type": "string", "const": "1.0" },
        "id":                { "type": "string", "minLength": 1 },
        "title":             { "type": "string" },
        "description":       { "type": ["string", "null"] },
        "sport":             { "$ref": "#/$defs/sport" },
        "sub_sport":         { "$ref": "#/$defs/sub_sport" },
        "started_at":        { "type": "string", "format": "date-time" },
        "distance_m":        { "type": ["number", "null"] },
        "duration_s":        { "type": ["integer", "null"] },
        "moving_time_s":     { "type": ["integer", "null"] },
        "elevation_gain_m":  { "type": ["number", "null"] },
        "elevation_loss_m":  { "type": ["number", "null"] },
        "avg_speed_kmh":     { "type": ["number", "null"] },
        "max_speed_kmh":     { "type": ["number", "null"] },
        "avg_hr_bpm":        { "type": ["integer", "null"] },
        "max_hr_bpm":        { "type": ["integer", "null"] },
        "avg_cadence_rpm":   { "type": ["integer", "null"] },
        "avg_power_w":       { "type": ["integer", "null"] },
        "max_power_w":       { "type": ["integer", "null"] },
        "gear":              { "type": ["string", "null"] },
        "device":            { "type": ["string", "null"] },
        "bbox":              { "$ref": "#/$defs/bbox" },
        "start_latlng":      { "$ref": "#/$defs/latlng" },
        "end_latlng":        { "$ref": "#/$defs/latlng" },
        "mmp":               { "$ref": "#/$defs/mmp" },
        "best_efforts":      { "$ref": "#/$defs/best_efforts" },
        "best_climb_m":      { "type": ["number", "null"] },
        "laps":              { "type": "array", "items": { "$ref": "#/$defs/lap" } },
        "timeseries":        { "$ref": "#/$defs/timeseries" },
        "source":            { "$ref": "#/$defs/source" },
        "source_file":       { "type": ["string", "null"] },
        "source_hash":       { "type": ["string", "null"] },
        "strava_id":         { "type": ["string", "null"] },
        "duplicate_of":      { "type": ["string", "null"] },
        "privacy":           { "$ref": "#/$defs/privacy" },
        "custom":            { "type": "object" }
      },
      "additionalProperties": false
    }
  ]
}