package model

import (
	"encoding/json"
	"time"

	"github.com/google/uuid"
)

const (
	StatusPending   = "pending"
	StatusRunning   = "running"
	StatusDone      = "done"
	StatusFailed    = "failed"
	StatusCancelled = "cancelled"
)

type Job struct {
	ID             uuid.UUID       `json:"id"`
	OwnerService   string          `json:"owner_service"`
	OwnerRef       string          `json:"owner_ref"`
	TaskType       string          `json:"task_type"`
	ModelProfile   string          `json:"model_profile"`
	Priority       int             `json:"priority"`
	Status         string          `json:"status"`
	Attempts       int             `json:"attempts"`
	MaxAttempts    int             `json:"max_attempts"`
	Input          json.RawMessage `json:"input"`
	Result         json.RawMessage `json:"result,omitempty"`
	ErrorCode      *string         `json:"error_code,omitempty"`
	ErrorMessage   *string         `json:"error_message,omitempty"`
	ScheduledAt    time.Time       `json:"scheduled_at"`
	StartedAt      *time.Time      `json:"started_at,omitempty"`
	CompletedAt    *time.Time      `json:"completed_at,omitempty"`
	WorkerID       *string         `json:"worker_id,omitempty"`
	HeartbeatAt    *time.Time      `json:"heartbeat_at,omitempty"`
	CreatedAt      time.Time       `json:"created_at"`
	UpdatedAt      time.Time       `json:"updated_at"`
	IdempotencyKey *string         `json:"idempotency_key,omitempty"`
}

type JobSummary struct {
	ID           uuid.UUID  `json:"id"`
	OwnerService string     `json:"owner_service"`
	OwnerRef     string     `json:"owner_ref"`
	TaskType     string     `json:"task_type"`
	ModelProfile string     `json:"model_profile"`
	Priority     int        `json:"priority"`
	Status       string     `json:"status"`
	Attempts     int        `json:"attempts"`
	MaxAttempts  int        `json:"max_attempts"`
	ErrorCode    *string    `json:"error_code,omitempty"`
	ErrorMessage *string    `json:"error_message,omitempty"`
	ScheduledAt  time.Time  `json:"scheduled_at"`
	StartedAt    *time.Time `json:"started_at,omitempty"`
	CompletedAt  *time.Time `json:"completed_at,omitempty"`
	WorkerID     *string    `json:"worker_id,omitempty"`
	HeartbeatAt  *time.Time `json:"heartbeat_at,omitempty"`
	CreatedAt    time.Time  `json:"created_at"`
	UpdatedAt    time.Time  `json:"updated_at"`
}

type CreateJob struct {
	OwnerService   string          `json:"owner_service"`
	OwnerRef       string          `json:"owner_ref"`
	TaskType       string          `json:"task_type"`
	ModelProfile   string          `json:"model_profile"`
	Priority       int             `json:"priority"`
	MaxAttempts    int             `json:"max_attempts"`
	Input          json.RawMessage `json:"input"`
	ScheduledAt    *time.Time      `json:"scheduled_at,omitempty"`
	IdempotencyKey *string         `json:"idempotency_key,omitempty"`
}

type ClaimJobs struct {
	WorkerID      string   `json:"worker_id"`
	TaskTypes     []string `json:"task_types"`
	ModelProfiles []string `json:"model_profiles"`
	Limit         int      `json:"limit"`
}

type CompleteJob struct {
	Result json.RawMessage `json:"result"`
}

type FailJob struct {
	ErrorCode    string `json:"error_code"`
	ErrorMessage string `json:"error_message"`
}

type JobFilter struct {
	OwnerService string   `json:"owner_service,omitempty"`
	OwnerRef     string   `json:"owner_ref,omitempty"`
	TaskType     string   `json:"task_type,omitempty"`
	ModelProfile string   `json:"model_profile,omitempty"`
	Statuses     []string `json:"statuses,omitempty"`
	ErrorCodes   []string `json:"error_codes,omitempty"`
	Limit        int      `json:"limit,omitempty"`
	Offset       int      `json:"offset,omitempty"`
}

type BatchActionResult struct {
	Updated int `json:"updated"`
}

type QueueStat struct {
	TaskType     string `json:"task_type"`
	ModelProfile string `json:"model_profile"`
	Status       string `json:"status"`
	Total        int64  `json:"total"`
}

type ErrorStat struct {
	OwnerService string `json:"owner_service,omitempty"`
	TaskType     string `json:"task_type"`
	ModelProfile string `json:"model_profile"`
	ErrorCode    string `json:"error_code"`
	Total        int64  `json:"total"`
	Last24h      int64  `json:"last_24h"`
}

type StageStat struct {
	OwnerService       string `json:"owner_service"`
	TaskType           string `json:"task_type"`
	ModelProfile       string `json:"model_profile"`
	Done24h            int64  `json:"done_24h"`
	AvgDurationSeconds int64  `json:"avg_duration_seconds"`
	AvgAttempts        int64  `json:"avg_attempts"`
	Retried24h         int64  `json:"retried_24h"`
}

type OwnerStat struct {
	OwnerService string `json:"owner_service"`
	TaskType     string `json:"task_type"`
	ModelProfile string `json:"model_profile"`
	Status       string `json:"status"`
	Total        int64  `json:"total"`
}

type Stats struct {
	At     time.Time   `json:"at"`
	Queues []QueueStat `json:"queues"`
	Owners []OwnerStat `json:"owners,omitempty"`
	Errors []ErrorStat `json:"errors,omitempty"`
	Stages []StageStat `json:"stages,omitempty"`
}