package horse

type RaceID int32

// Race is the internal data about a race.
type Race struct {
	ID        RaceID `json:"race_id"`
	Name      string `json:"name"`
	Thumbnail int    `json:"thumbnail"`
	// Some careers contain unusual versions of races, e.g. Tenno Sho (Spring)
	// in Hanshin instead of Kyoto for Narita Taishin and Biwa Hayahide.
	// For such races, this field holds the normal race ID.
	Primary RaceID `json:"primary"`
}

type RaceTrackID int32

type RacecourseID int32

// Racecourse is interpreted race course data.
type Racecourse struct {
	ID            RacecourseID       `json:"race_course_id"`
	TrackID       int32              `json:"race_track_id"`
	TrackName     string             `json:"race_track_name"`
	Distance      float32            `json:"distance"`
	Ground        int8               `json:"ground"`
	InOut         int8               `json:"inout"`
	Turn          int8               `json:"turn"`
	LaneMax       TenThousandths     `json:"lane_max"`
	Threshold1    int8               `json:"threshold1,omitzero"`
	Threshold2    int8               `json:"threshold2,omitzero"`
	LaneStart     [18]TenThousandths `json:"lane_start,omitzero"`
	Spans         []RacecourseSpan   `json:"spans"`
	Slopes        []Slope            `json:"slopes"`
	MoveLanePoint float32            `json:"move_lane_point"`
}

// NOTE(zephyr): Racecourse.LaneStart is omitzero so that the JSON field is
// unsoundly undefined when the initial lane type is an unrecognized value.
// That should result in an error in the frontend, rather than a panic in the backend.

// RacecourseSpan is a span of a racecourse, which may be a straight, a corner,
// or a segment of the course which is neither a straight nor a corner.
type RacecourseSpan struct {
	// Start is the distance in meters along the track at which the span starts.
	Start float32 `json:"start"`
	// End is the distance in meters along the track at which the span ends.
	End float32 `json:"end"`
	// Straight is whether the span is formally a straight.
	Straight bool `json:"straight,omitzero"`
	// FarStraight is whether the span is the backstretch.
	// If true, then Straight is also true.
	FarStraight bool `json:"far_straight,omitzero"`
	// Corner is the corner number of the span, or zero if not a corner.
	Corner int8 `json:"corner,omitzero"`
}

// Slope is a slope segment of a racecourse.
type Slope struct {
	Per   TenThousandths `json:"per"`
	Start float32        `json:"start"`
	End   float32        `json:"end"`
}

type SaddleID int32

// Saddle is the internal data about a race win saddle.
type Saddle struct {
	ID    SaddleID   `json:"saddle_id"`
	Name  string     `json:"name"`
	Races []RaceID   `json:"races"`
	Type  SaddleType `json:"type"`
	// Saddles that involve alternate races are themselves alternate.
	// For such saddles, this field holds the normal saddle ID.
	Primary SaddleID `json:"primary"`
}

type SaddleType int8

const (
	// Saddle for multiple race wins, e.g. Classic Triple Crown, Dual Grand Prix, &c.
	SaddleTypeHonor SaddleType = iota
	SaddleTypeG3
	SaddleTypeG2
	SaddleTypeG1
)

type ScenarioID int8

// Scenario is metadata about a career scenario.
type Scenario struct {
	ID    ScenarioID `json:"scenario_id"`
	Name  string     `json:"name"`
	Title string     `json:"title"`
}