package task

import (
	"context"
	taskbiz "kra/internal/biz/task"
	"kra/pkg/database/gormkit"
	"kra/pkg/database/pagination"
	"time"

	"gorm.io/gorm"
)

type taskPO struct {
	ID                        uint `gorm:"primaryKey"`
	CreatedAt                 time.Time
	UpdatedAt                 time.Time
	DeletedAt                 gorm.DeletedAt `gorm:"index"`
	Name                      string         `gorm:"index"`
	Description, Spec         string
	WithSeconds               bool
	ExecutorType, MethodName  string
	Params                    gormkit.JSON
	HTTPURL                   string
	HTTPMethod                string
	HTTPHeader                gormkit.JSON
	HTTPBody                  string `gorm:"type:text"`
	HTTPAllowPrivate, Enabled bool
}

func (taskPO) TableName() string { return "sys_timed_tasks" }

type taskLogPO struct {
	ID                    uint `gorm:"primaryKey"`
	CreatedAt             time.Time
	UpdatedAt             time.Time
	DeletedAt             gorm.DeletedAt `gorm:"index"`
	TaskID                uint           `gorm:"index"`
	TaskName, TriggerType string
	StartedAt, FinishedAt time.Time
	DurationMS            int64
	Status                string
	ErrorMsg, Output      string `gorm:"type:text"`
}

func (taskLogPO) TableName() string { return "sys_timed_task_logs" }

type taskRepo struct{ data Provider }

func NewTaskRepo(data Provider) taskbiz.TaskRepo { return &taskRepo{data: data} }
func taskToPO(v *taskbiz.TimedTask) taskPO {
	return taskPO{ID: v.ID, Name: v.Name, Description: v.Description, Spec: v.Spec, WithSeconds: v.WithSeconds, ExecutorType: v.ExecutorType, MethodName: v.MethodName, Params: gormkit.JSON(v.Params), HTTPURL: v.HTTPURL, HTTPMethod: v.HTTPMethod, HTTPHeader: gormkit.JSON(v.HTTPHeader), HTTPBody: v.HTTPBody, HTTPAllowPrivate: v.HTTPAllowPrivate, Enabled: v.Enabled}
}
func taskFromPO(v taskPO) *taskbiz.TimedTask {
	return &taskbiz.TimedTask{ID: v.ID, CreatedAt: v.CreatedAt, UpdatedAt: v.UpdatedAt, Name: v.Name, Description: v.Description, Spec: v.Spec, WithSeconds: v.WithSeconds, ExecutorType: v.ExecutorType, MethodName: v.MethodName, Params: []byte(v.Params), HTTPURL: v.HTTPURL, HTTPMethod: v.HTTPMethod, HTTPHeader: []byte(v.HTTPHeader), HTTPBody: v.HTTPBody, HTTPAllowPrivate: v.HTTPAllowPrivate, Enabled: v.Enabled}
}
func (r *taskRepo) CreateTask(ctx context.Context, v *taskbiz.TimedTask) error {
	po := taskToPO(v)
	if err := r.data.DB().WithContext(ctx).Create(&po).Error; err != nil {
		return err
	}
	v.ID = po.ID
	return nil
}
func (r *taskRepo) TaskNameExists(ctx context.Context, name string, excludeID uint) (bool, error) {
	var count int64
	db := r.data.DB().WithContext(ctx).Model(&taskPO{}).Where("name = ?", name)
	if excludeID > 0 {
		db = db.Where("id <> ?", excludeID)
	}
	err := db.Count(&count).Error
	return count > 0, err
}
func (r *taskRepo) UpdateTask(ctx context.Context, v *taskbiz.TimedTask) error {
	po := taskToPO(v)
	return r.data.DB().WithContext(ctx).Model(&taskPO{}).Where("id = ?", v.ID).Select("name", "description", "spec", "with_seconds", "executor_type", "method_name", "params", "http_url", "http_method", "http_header", "http_body", "http_allow_private", "enabled").Updates(&po).Error
}
func (r *taskRepo) DeleteTask(ctx context.Context, id uint) error {
	return r.data.DB().WithContext(ctx).Delete(&taskPO{}, id).Error
}
func (r *taskRepo) FindTask(ctx context.Context, id uint) (*taskbiz.TimedTask, error) {
	var po taskPO
	if err := r.data.DB().WithContext(ctx).First(&po, id).Error; err != nil {
		return nil, err
	}
	return taskFromPO(po), nil
}
func (r *taskRepo) ListTasks(ctx context.Context, page, size int, q *taskbiz.TimedTask) ([]*taskbiz.TimedTask, int64, error) {
	// During first-install the data layer intentionally serves a bootstrap
	// database without system tables. The scheduler starts before /init/initdb
	// and should remain idle instead of logging a missing-table SQL error.
	if !r.data.DatabaseReady() {
		return []*taskbiz.TimedTask{}, 0, nil
	}
	db := r.data.DB().WithContext(ctx).Model(&taskPO{})
	if q != nil {
		if q.Name != "" {
			db = db.Where("name LIKE ?", "%"+q.Name+"%")
		}
		if q.ExecutorType != "" {
			db = db.Where("executor_type = ?", q.ExecutorType)
		}
		if q.EnabledFilter != nil {
			db = db.Where("enabled = ?", *q.EnabledFilter)
		}
	}
	var total int64
	if err := db.Count(&total).Error; err != nil {
		return nil, 0, err
	}
	var pos []taskPO
	if err := pagination.Apply(db.Order("id desc"), page, size, 100).Find(&pos).Error; err != nil {
		return nil, 0, err
	}
	out := make([]*taskbiz.TimedTask, 0, len(pos))
	for _, po := range pos {
		out = append(out, taskFromPO(po))
	}
	return out, total, nil
}
func (r *taskRepo) ToggleTask(ctx context.Context, id uint, enabled bool) error {
	return r.data.DB().WithContext(ctx).Model(&taskPO{}).Where("id = ?", id).Update("enabled", enabled).Error
}
func (r *taskRepo) RecordTaskLog(ctx context.Context, v *taskbiz.TimedTaskLog) error {
	return r.data.DB().WithContext(ctx).Create(&taskLogPO{TaskID: v.TaskID, TaskName: v.TaskName, TriggerType: v.TriggerType, StartedAt: v.StartedAt, FinishedAt: v.FinishedAt, DurationMS: v.DurationMS, Status: v.Status, ErrorMsg: v.ErrorMsg, Output: v.Output}).Error
}
func taskLogFromPO(v taskLogPO) *taskbiz.TimedTaskLog {
	return &taskbiz.TimedTaskLog{ID: v.ID, CreatedAt: v.CreatedAt, UpdatedAt: v.UpdatedAt, TaskID: v.TaskID, TaskName: v.TaskName, TriggerType: v.TriggerType, StartedAt: v.StartedAt, FinishedAt: v.FinishedAt, DurationMS: v.DurationMS, Status: v.Status, ErrorMsg: v.ErrorMsg, Output: v.Output}
}
func (r *taskRepo) ListTaskLogs(ctx context.Context, page, size int, taskID uint, status string) ([]*taskbiz.TimedTaskLog, int64, error) {
	db := r.data.DB().WithContext(ctx).Model(&taskLogPO{})
	if taskID != 0 {
		db = db.Where("task_id = ?", taskID)
	}
	if status != "" {
		db = db.Where("status = ?", status)
	}
	var total int64
	if err := db.Count(&total).Error; err != nil {
		return nil, 0, err
	}
	var pos []taskLogPO
	if err := pagination.Apply(db.Order("id desc"), page, size, 100).Find(&pos).Error; err != nil {
		return nil, 0, err
	}
	out := make([]*taskbiz.TimedTaskLog, 0, len(pos))
	for _, po := range pos {
		out = append(out, taskLogFromPO(po))
	}
	return out, total, nil
}
func (r *taskRepo) CleanupTaskLogs(ctx context.Context) error {
	return r.data.DB().WithContext(ctx).Unscoped().
		Where("created_at < ?", time.Now().Add(-720*time.Hour)).
		Delete(&taskLogPO{}).Error
}