package automation

import (
	"database/sql/driver"
	"encoding/json"
	"fmt"
	"time"
)

// UUID is a custom type for PostgreSQL UUID
type UUID string

func (u UUID) String() string {
	return string(u)
}

// Value implements the driver.Valuer interface
func (u UUID) Value() (driver.Value, error) {
	return string(u), nil
}

// Scan implements the sql.Scanner interface
func (u *UUID) Scan(value interface{}) error {
	if value == nil {
		*u = ""
		return nil
	}
	switch v := value.(type) {
	case string:
		*u = UUID(v)
	case []byte:
		*u = UUID(string(v))
	default:
		return fmt.Errorf("cannot scan type %T into UUID", value)
	}
	return nil
}

// JSONMap is a map that can be stored as JSONB
type JSONMap map[string]interface{}

// Value implements the driver.Valuer interface
func (j JSONMap) Value() (driver.Value, error) {
	if j == nil {
		return []byte("{}"), nil
	}
	return json.Marshal(j)
}

// Scan implements the sql.Scanner interface
func (j *JSONMap) Scan(value interface{}) error {
	if value == nil {
		*j = JSONMap{}
		return nil
	}
	var bytes []byte
	switch v := value.(type) {
	case string:
		bytes = []byte(v)
	case []byte:
		bytes = v
	default:
		return fmt.Errorf("cannot scan type %T into JSONMap", value)
	}
	return json.Unmarshal(bytes, j)
}

// ScheduledJob represents a scheduled automation job
type ScheduledJob struct {
	ID          UUID       `json:"id"`
	TenantID    UUID       `json:"tenant_id"`
	Name        string     `json:"name"`
	Description string     `json:"description"`
	CronExpr    string     `json:"cron_expr"`
	Timezone    string     `json:"timezone"`
	JobType     string     `json:"job_type"`
	JobConfig   JSONMap    `json:"job_config"`
	Status      string     `json:"status"`
	LastRunAt   *time.Time `json:"last_run_at"`
	NextRunAt   *time.Time `json:"next_run_at"`
	RunCount    int        `json:"run_count"`
	FailCount   int        `json:"fail_count"`
	CreatedBy   *UUID      `json:"created_by"`
	CreatedAt   time.Time  `json:"created_at"`
	UpdatedAt   time.Time  `json:"updated_at"`
}

// Workflow represents an automation workflow
type Workflow struct {
	ID            UUID       `json:"id"`
	TenantID      UUID       `json:"tenant_id"`
	Name          string     `json:"name"`
	Description   string     `json:"description"`
	TriggerType   string     `json:"trigger_type"`
	TriggerConfig JSONMap    `json:"trigger_config"`
	Actions       []JSONMap  `json:"actions"`
	Status        string     `json:"status"`
	LastRunAt     *time.Time `json:"last_run_at"`
	NextRunAt     *time.Time `json:"next_run_at"`
	RunCount      int        `json:"run_count"`
	FailCount     int        `json:"fail_count"`
	CreatedBy     *UUID      `json:"created_by"`
	CreatedAt     time.Time  `json:"created_at"`
	UpdatedAt     time.Time  `json:"updated_at"`
}