package repository

import (
	"context"
	"database/sql"
	"time"

	"github.com/google/uuid"
	"github.com/muyuqingfeng/iloom/textile-service/internal/model"
)

type StepRepo struct {
	db *sql.DB
}

func NewStepRepo(db *sql.DB) *StepRepo {
	return &StepRepo{db: db}
}

func (r *StepRepo) GetByPlan(ctx context.Context, planID string) ([]model.ProcessStep, error) {
	query := `
		SELECT id, plan_id, step_type, status, notes, operator_id, company_id, timestamp, created_at
		FROM ilm_process_step
		WHERE plan_id = ?
		ORDER BY created_at ASC`

	rows, err := r.db.QueryContext(ctx, query, planID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()

	var steps []model.ProcessStep
	for rows.Next() {
		var s model.ProcessStep
		if err := rows.Scan(
			&s.ID, &s.PlanID, &s.StepType, &s.Status, &s.Notes,
			&s.OperatorID, &s.CompanyID, &s.Timestamp, &s.CreatedAt,
		); err != nil {
			return nil, err
		}
		steps = append(steps, s)
	}
	return steps, rows.Err()
}

func (r *StepRepo) GetByID(ctx context.Context, id string) (*model.ProcessStep, error) {
	query := `
		SELECT id, plan_id, step_type, status, notes, operator_id, company_id, timestamp, created_at
		FROM ilm_process_step
		WHERE id = ?`

	var s model.ProcessStep
	err := r.db.QueryRowContext(ctx, query, id).Scan(
		&s.ID, &s.PlanID, &s.StepType, &s.Status, &s.Notes,
		&s.OperatorID, &s.CompanyID, &s.Timestamp, &s.CreatedAt,
	)
	if err != nil {
		return nil, err
	}
	return &s, nil
}

func (r *StepRepo) UpdateStatus(ctx context.Context, id, status, operatorID string, notes *string) error {
	now := time.Now()
	query := `
		UPDATE ilm_process_step
		SET status = ?, operator_id = ?, notes = ?, timestamp = ?
		WHERE id = ?`

	_, err := r.db.ExecContext(ctx, query, status, operatorID, notes, now, id)
	return err
}

func (r *StepRepo) CreateSteps(ctx context.Context, tx *sql.Tx, planID, companyID string) error {
	query := `
		INSERT INTO ilm_process_step (id, plan_id, step_type, status, company_id, created_at)
		VALUES (?, ?, ?, ?, ?, ?)`

	now := time.Now()
	for _, stepType := range model.StepOrder {
		id := uuid.New().String()
		if _, err := tx.ExecContext(ctx, query, id, planID, stepType, "pending", companyID, now); err != nil {
			return err
		}
	}
	return nil
}