// Package main contains the genseed utility. It is built into a standalone
// binary via `go build ./scripts/genseed` and is not part of the runtime.
//
// Usage:
//
//	go run ./scripts/genseed seeds.json > 002_seed.sql
//
// It reads the JSON dump produced by `DUMP_SEEDS=1 go test ./internal/catalog`
// and emits ON CONFLICT-safe INSERTs for the catalog tables.
package main

import (
	"encoding/json"
	"fmt"
	"os"
	"strconv"
	"strings"
)

type waypoint struct {
	X          float64 `json:"x"`
	Y          float64 `json:"y"`
	HeadingRad float64 `json:"heading_rad"`
	SpeedMs    float64 `json:"speed_ms"`
	Curvature  float64 `json:"curvature"`
}

type bounds struct {
	MinX    float64 `json:"min_x"`
	MinY    float64 `json:"min_y"`
	MaxX    float64 `json:"max_x"`
	MaxY    float64 `json:"max_y"`
	LengthM float64 `json:"length_m"`
	WidthM  float64 `json:"width_m"`
}

type track struct {
	ID            string     `json:"id"`
	Name          string     `json:"name"`
	Description   string     `json:"description"`
	AuthorID      string     `json:"author_id"`
	Visibility    string     `json:"visibility"`
	Scale         int        `json:"scale"`
	LengthM       float64    `json:"length_m"`
	WidthM        float64    `json:"width_m"`
	LaneWidthM    float64    `json:"lane_width_m"`
	Bounds        bounds     `json:"bounds"`
	Surface       string     `json:"surface"`
	Tags          []string   `json:"tags"`
	Centerline    []waypoint `json:"centerline"`
	BestLapMs     int64      `json:"best_lap_ms"`
	BestLapHolder string     `json:"best_lap_holder"`
	CreatedMs     int64      `json:"created_ms"`
	UpdatedMs     int64      `json:"updated_ms"`
}

type chassis struct {
	Model       string  `json:"model"`
	Material    string  `json:"material"`
	Printed     bool    `json:"printed"`
	WheelbaseMm float64 `json:"wheelbase_mm"`
	TrackMm     float64 `json:"track_mm"`
}

type motor struct {
	Kind   string  `json:"kind"`
	Class  string  `json:"class"`
	KV     int     `json:"kv"`
	PowerW float64 `json:"power_w"`
}

type battery struct {
	VoltageV    float64 `json:"voltage_v"`
	CapacityMah int     `json:"capacity_mah"`
	Cells       int     `json:"cells"`
	Chemistry   string  `json:"chemistry"`
}

type car struct {
	ID         string  `json:"id"`
	Name       string  `json:"name"`
	OwnerID    string  `json:"owner_id"`
	Visibility string  `json:"visibility"`
	Scale      int     `json:"scale"`
	LengthMm   float64 `json:"length_mm"`
	WidthMm    float64 `json:"width_mm"`
	HeightMm   float64 `json:"height_mm"`
	WeightG    float64 `json:"weight_g"`
	Chassis    chassis `json:"chassis"`
	Motor      motor   `json:"motor"`
	Battery    battery `json:"battery"`
	Drive      string  `json:"drive"`
	TopSpeedMs float64 `json:"top_speed_ms"`
	ColorHex   string  `json:"color_hex"`
	AvatarURL  string  `json:"avatar_url"`
	Active     bool    `json:"active"`
	CreatedMs  int64   `json:"created_ms"`
	UpdatedMs  int64   `json:"updated_ms"`
}

type dump struct {
	Tracks []track `json:"tracks"`
	Cars   []car   `json:"cars"`
}

func main() {
	if len(os.Args) < 2 {
		fmt.Fprintln(os.Stderr, "usage: genseed <seeds.json>")
		os.Exit(2)
	}
	f, err := os.Open(os.Args[1])
	if err != nil {
		panic(err)
	}
	defer f.Close()
	var d dump
	if err := json.NewDecoder(f).Decode(&d); err != nil {
		panic(err)
	}

	var b strings.Builder
	b.WriteString("-- 002_seed.sql — initial system catalog (tracks + cars).\n")
	b.WriteString("-- Generated from internal/catalog/seeddefs via scripts/genseed.\n")
	b.WriteString("-- Idempotent: safe to re-apply (ON CONFLICT DO NOTHING).\n\n")

	for _, t := range d.Tracks {
		fmt.Fprintf(&b, "INSERT INTO tracks (id, name, description, author_id, visibility, scale,\n")
		fmt.Fprintf(&b, "    length_m, width_m, lane_width_m, surface, best_lap_ms, best_lap_holder,\n")
		fmt.Fprintf(&b, "    bounds_min_x, bounds_min_y, bounds_max_x, bounds_max_y,\n")
		fmt.Fprintf(&b, "    created_ms, updated_ms)\n")
		fmt.Fprintf(&b, "VALUES (%s, %s, %s, %s, %s, %d,\n",
			sqlStr(t.ID), sqlStr(t.Name), sqlStr(t.Description), sqlStr(t.AuthorID),
			sqlStr(t.Visibility), t.Scale)
		fmt.Fprintf(&b, "    %s, %s, %s, %s, %d, %s,\n",
			sqlF(t.LengthM), sqlF(t.WidthM), sqlF(t.LaneWidthM), sqlStr(t.Surface),
			t.BestLapMs, sqlStr(t.BestLapHolder))
		fmt.Fprintf(&b, "    %s, %s, %s, %s,\n",
			sqlF(t.Bounds.MinX), sqlF(t.Bounds.MinY), sqlF(t.Bounds.MaxX), sqlF(t.Bounds.MaxY))
		fmt.Fprintf(&b, "    %d, %d)\n", t.CreatedMs, t.UpdatedMs)
		b.WriteString("ON CONFLICT (id) DO NOTHING;\n\n")

		for i, wp := range t.Centerline {
			fmt.Fprintf(&b, "INSERT INTO track_waypoints (track_id, seq, x, y, heading_rad, speed_ms, curvature)\n")
			fmt.Fprintf(&b, "VALUES (%s, %d, %s, %s, %s, %s, %s)\n",
				sqlStr(t.ID), i,
				sqlF(wp.X), sqlF(wp.Y), sqlF(wp.HeadingRad), sqlF(wp.SpeedMs), sqlF(wp.Curvature))
			b.WriteString("ON CONFLICT (track_id, seq) DO NOTHING;\n")
		}
		b.WriteString("\n")

		for _, tag := range t.Tags {
			fmt.Fprintf(&b, "INSERT INTO track_tags (track_id, tag) VALUES (%s, %s)\n",
				sqlStr(t.ID), sqlStr(tag))
			b.WriteString("ON CONFLICT DO NOTHING;\n")
		}
		b.WriteString("\n")
	}

	for _, c := range d.Cars {
		fmt.Fprintf(&b, "INSERT INTO cars (id, name, owner_id, visibility, scale,\n")
		fmt.Fprintf(&b, "    length_mm, width_mm, height_mm, weight_g,\n")
		fmt.Fprintf(&b, "    chassis_model, chassis_material, chassis_printed, chassis_wheelbase_mm, chassis_track_mm,\n")
		fmt.Fprintf(&b, "    motor_kind, motor_class, motor_kv, motor_power_w,\n")
		fmt.Fprintf(&b, "    battery_voltage_v, battery_capacity_mah, battery_cells, battery_chemistry,\n")
		fmt.Fprintf(&b, "    drive, top_speed_ms, color_hex, avatar_url, active,\n")
		fmt.Fprintf(&b, "    created_ms, updated_ms)\n")
		fmt.Fprintf(&b, "VALUES (%s, %s, %s, %s, %d,\n",
			sqlStr(c.ID), sqlStr(c.Name), sqlStr(c.OwnerID), sqlStr(c.Visibility), c.Scale)
		fmt.Fprintf(&b, "    %s, %s, %s, %s,\n",
			sqlF(c.LengthMm), sqlF(c.WidthMm), sqlF(c.HeightMm), sqlF(c.WeightG))
		fmt.Fprintf(&b, "    %s, %s, %s, %s, %s,\n",
			sqlStr(c.Chassis.Model), sqlStr(c.Chassis.Material), sqlBool(c.Chassis.Printed),
			sqlF(c.Chassis.WheelbaseMm), sqlF(c.Chassis.TrackMm))
		fmt.Fprintf(&b, "    %s, %s, %d, %s,\n",
			sqlStr(c.Motor.Kind), sqlStr(c.Motor.Class), c.Motor.KV, sqlF(c.Motor.PowerW))
		fmt.Fprintf(&b, "    %s, %d, %d, %s,\n",
			sqlF(c.Battery.VoltageV), c.Battery.CapacityMah, c.Battery.Cells, sqlStr(c.Battery.Chemistry))
		fmt.Fprintf(&b, "    %s, %s, %s, %s, %s,\n",
			sqlStr(c.Drive), sqlF(c.TopSpeedMs), sqlStr(c.ColorHex), sqlStr(c.AvatarURL), sqlBool(c.Active))
		fmt.Fprintf(&b, "    %d, %d)\n", c.CreatedMs, c.UpdatedMs)
		b.WriteString("ON CONFLICT (id) DO NOTHING;\n\n")
	}

	os.Stdout.WriteString(b.String())
}

func sqlStr(s string) string {
	return "'" + strings.ReplaceAll(s, "'", "''") + "'"
}

func sqlBool(b bool) string {
	if b {
		return "TRUE"
	}
	return "FALSE"
}

func sqlF(f float64) string {
	return strconv.FormatFloat(f, 'f', -1, 64)
}