package model

import (
	"errors"
	"fmt"
	"strings"
	"time"
)

type BenchmarkConfig struct {
	DurationSecs int  `json:"durationSecs"`
	Intensity    int  `json:"intensity"`
	CoreFilter   int  `json:"coreFilter"`
	MultiCore    bool `json:"multiCore"`
}

type CPUInfo struct {
	BrandString       string              `json:"brandString"`
	VendorID          string              `json:"vendorID"`
	PhysicalCores     int                 `json:"physicalCores"`
	LogicalCores      int                 `json:"logicalCores"`
	BaseClockMHz      int                 `json:"baseClockMHz"`
	BoostClockMHz     int                 `json:"boostClockMHz"`
	L1DataKB          int                 `json:"l1DataKB"`
	L2KB              int                 `json:"l2KB"`
	L3MB              int                 `json:"l3MB"`
	IsHybrid          bool                `json:"isHybrid,omitempty"`
	Has3DVCache       bool                `json:"has3DVCache,omitempty"`
	PCoreCount        int                 `json:"pCoreCount,omitempty"`
	ECoreCount        int                 `json:"eCoreCount,omitempty"`
	Cores             []CPUCoreDescriptor `json:"cores,omitempty"`
	SupportedFeatures []string            `json:"supportedFeatures,omitempty"`
}

type CPUCoreDescriptor struct {
	LogicalID  int `json:"LogicalID"`
	PhysicalID int `json:"PhysicalID"`
	CoreID     int `json:"CoreID"`
	Type       int `json:"Type"`
}

type SystemInfo struct {
	Hostname      string         `json:"hostname,omitempty"`
	OSName        string         `json:"osName,omitempty"`
	OSVersion     string         `json:"osVersion,omitempty"`
	Distro        string         `json:"distro,omitempty"`
	KernelVersion string         `json:"kernelVersion,omitempty"`
	KernelArch    string         `json:"kernelArch,omitempty"`
	Architecture  string         `json:"architecture,omitempty"`
	Locale        string         `json:"locale,omitempty"`
	Timezone      string         `json:"timezone,omitempty"`
	Region        string         `json:"region,omitempty"`
	Country       string         `json:"country,omitempty"`
	City          string         `json:"city,omitempty"`
	ISP           string         `json:"isp,omitempty"`
	SessionID     string         `json:"sessionID,omitempty"`
	UserID        string         `json:"userID,omitempty"`
	ClientVersion string         `json:"clientVersion,omitempty"`
	AppVersion    string         `json:"appVersion,omitempty"`
	IPAddress     string         `json:"ipAddress,omitempty"`
	ForwardedFor  string         `json:"forwardedFor,omitempty"`
	UserAgent     string         `json:"userAgent,omitempty"`
	Extra         map[string]any `json:"extra,omitempty"`
}

type CoreResult struct {
	LogicalID  int     `json:"logicalID"`
	CoreType   string  `json:"coreType"`
	MOpsPerSec float64 `json:"mOpsPerSec"`
	TotalOps   int64   `json:"totalOps"`
}

type BenchmarkResult struct {
	Config      BenchmarkConfig `json:"config"`
	CPUInfo     CPUInfo         `json:"cpuInfo"`
	StartedAt   time.Time       `json:"startedAt"`
	Duration    int64           `json:"duration"`
	TotalOps    int64           `json:"totalOps"`
	MOpsPerSec  float64         `json:"mOpsPerSec"`
	Score       int64           `json:"score"`
	CoreResults []CoreResult    `json:"coreResults"`
}

type Submission struct {
	SubmissionID string      `json:"submissionID"`
	Submitter    string      `json:"submitter"`
	Platform     string      `json:"platform"`
	SubmittedAt  time.Time   `json:"submittedAt"`
	SystemInfo   *SystemInfo `json:"systemInfo,omitempty"`
	BenchmarkResult
}

func (b BenchmarkResult) Validate() error {
	if strings.TrimSpace(b.CPUInfo.BrandString) == "" {
		return errors.New("cpuInfo.brandString is required")
	}

	if b.StartedAt.IsZero() {
		return errors.New("startedAt is required and must be RFC3339-compatible")
	}

	if b.Config.DurationSecs <= 0 {
		return errors.New("config.durationSecs must be greater than zero")
	}

	if b.Duration <= 0 {
		return errors.New("duration must be greater than zero")
	}

	if b.TotalOps < 0 || b.Score < 0 || b.MOpsPerSec < 0 {
		return errors.New("duration, totalOps, mOpsPerSec, and score must be non-negative")
	}

	if b.CPUInfo.LogicalCores < 0 || b.CPUInfo.PhysicalCores < 0 {
		return errors.New("cpu core counts must be non-negative")
	}

	for _, result := range b.CoreResults {
		if result.LogicalID < 0 {
			return fmt.Errorf("coreResults.logicalID must be non-negative")
		}

		if result.MOpsPerSec < 0 || result.TotalOps < 0 {
			return fmt.Errorf("coreResults values must be non-negative")
		}
	}

	return nil
}

func NormalizeSubmitter(submitter string) string {
	submitter = strings.TrimSpace(submitter)
	if submitter == "" {
		return "Anonymous"
	}

	return submitter
}

func NormalizePlatform(platform string) string {
	switch strings.ToLower(strings.TrimSpace(platform)) {
	case "", "windows":
		return "windows"
	case "linux":
		return "linux"
	case "macos":
		return "macos"
	default:
		return ""
	}
}

func ValidatePlatform(platform string) error {
	if NormalizePlatform(platform) == "" {
		return errors.New("platform must be one of windows, linux, or macos")
	}

	return nil
}

func ThreadModeLabel(multiCore bool) string {
	if multiCore {
		return "Multi-threaded"
	}

	return "Single-threaded"
}

func CloneSubmission(submission *Submission) *Submission {
	if submission == nil {
		return nil
	}

	copySubmission := *submission
	if len(submission.CoreResults) > 0 {
		copySubmission.CoreResults = append([]CoreResult(nil), submission.CoreResults...)
	}

	if len(submission.CPUInfo.Cores) > 0 {
		copySubmission.CPUInfo.Cores = append([]CPUCoreDescriptor(nil), submission.CPUInfo.Cores...)
	}

	if len(submission.CPUInfo.SupportedFeatures) > 0 {
		copySubmission.CPUInfo.SupportedFeatures = append([]string(nil), submission.CPUInfo.SupportedFeatures...)
	}
	if submission.SystemInfo != nil {
		copySystemInfo := *submission.SystemInfo
		if len(submission.SystemInfo.Extra) > 0 {
			copySystemInfo.Extra = make(map[string]any, len(submission.SystemInfo.Extra))
			for key, value := range submission.SystemInfo.Extra {
				copySystemInfo.Extra[key] = value
			}
		}
		copySubmission.SystemInfo = &copySystemInfo
	}

	return &copySubmission
}