// Code generated by sqlc. DO NOT EDIT.
// versions:
//   sqlc v1.30.0
// source: exam_prep_units.sql

package dbgen

import (
	"context"

	"github.com/jackc/pgx/v5/pgtype"
)

const ExamPrepCreateUnit = `-- name: ExamPrepCreateUnit :one
INSERT INTO exam_prep.units (catalog_course_id, name, description, thumbnail, sort_order)
SELECT
    $1,
    $2,
    $3,
    $4,
    COALESCE($5::int,
        COALESCE((
            SELECT
                max(u.sort_order)
            FROM exam_prep.units u
            WHERE
                u.catalog_course_id = $1), 0) + 1)
RETURNING
    id, catalog_course_id, name, description, thumbnail, sort_order, created_at, updated_at
`

type ExamPrepCreateUnitParams struct {
	CatalogCourseID int64       `json:"catalog_course_id"`
	Name            string      `json:"name"`
	Description     pgtype.Text `json:"description"`
	Thumbnail       pgtype.Text `json:"thumbnail"`
	SortOrder       pgtype.Int4 `json:"sort_order"`
}

func (q *Queries) ExamPrepCreateUnit(ctx context.Context, arg ExamPrepCreateUnitParams) (ExamPrepUnit, error) {
	row := q.db.QueryRow(ctx, ExamPrepCreateUnit,
		arg.CatalogCourseID,
		arg.Name,
		arg.Description,
		arg.Thumbnail,
		arg.SortOrder,
	)
	var i ExamPrepUnit
	err := row.Scan(
		&i.ID,
		&i.CatalogCourseID,
		&i.Name,
		&i.Description,
		&i.Thumbnail,
		&i.SortOrder,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const ExamPrepDeleteUnit = `-- name: ExamPrepDeleteUnit :exec
DELETE FROM exam_prep.units
WHERE id = $1
`

func (q *Queries) ExamPrepDeleteUnit(ctx context.Context, id int64) error {
	_, err := q.db.Exec(ctx, ExamPrepDeleteUnit, id)
	return err
}

const ExamPrepGetUnitByID = `-- name: ExamPrepGetUnitByID :one
SELECT
    u.id, u.catalog_course_id, u.name, u.description, u.thumbnail, u.sort_order, u.created_at, u.updated_at,
    EXISTS (
        SELECT 1
        FROM exam_prep.lesson_practices p
        INNER JOIN exam_prep.unit_module_lessons l ON l.id = p.unit_module_lesson_id
        INNER JOIN exam_prep.unit_modules m ON m.id = l.unit_module_id
        WHERE m.unit_id = u.id
    ) AS has_practice
FROM exam_prep.units u
WHERE u.id = $1
`

type ExamPrepGetUnitByIDRow struct {
	ID              int64              `json:"id"`
	CatalogCourseID int64              `json:"catalog_course_id"`
	Name            string             `json:"name"`
	Description     pgtype.Text        `json:"description"`
	Thumbnail       pgtype.Text        `json:"thumbnail"`
	SortOrder       int32              `json:"sort_order"`
	CreatedAt       pgtype.Timestamptz `json:"created_at"`
	UpdatedAt       pgtype.Timestamptz `json:"updated_at"`
	HasPractice     bool               `json:"has_practice"`
}

func (q *Queries) ExamPrepGetUnitByID(ctx context.Context, id int64) (ExamPrepGetUnitByIDRow, error) {
	row := q.db.QueryRow(ctx, ExamPrepGetUnitByID, id)
	var i ExamPrepGetUnitByIDRow
	err := row.Scan(
		&i.ID,
		&i.CatalogCourseID,
		&i.Name,
		&i.Description,
		&i.Thumbnail,
		&i.SortOrder,
		&i.CreatedAt,
		&i.UpdatedAt,
		&i.HasPractice,
	)
	return i, err
}

const ExamPrepListUnitIDsByCatalogCourse = `-- name: ExamPrepListUnitIDsByCatalogCourse :many
SELECT
    u.id
FROM exam_prep.units u
WHERE
    u.catalog_course_id = $1
ORDER BY
    u.id
`

func (q *Queries) ExamPrepListUnitIDsByCatalogCourse(ctx context.Context, catalogCourseID int64) ([]int64, error) {
	rows, err := q.db.Query(ctx, ExamPrepListUnitIDsByCatalogCourse, catalogCourseID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []int64
	for rows.Next() {
		var id int64
		if err := rows.Scan(&id); err != nil {
			return nil, err
		}
		items = append(items, id)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const ExamPrepListUnitsByCatalogCourse = `-- name: ExamPrepListUnitsByCatalogCourse :many
WITH unit_counts AS (
    SELECT
        u.id AS unit_id,
        COUNT(DISTINCT m.id)::BIGINT AS modules_count,
        COUNT(DISTINCT l.id)::BIGINT AS lessons_count,
        COUNT(DISTINCT p.id)::BIGINT AS practices_count
    FROM exam_prep.units u
    LEFT JOIN exam_prep.unit_modules m ON m.unit_id = u.id
    LEFT JOIN exam_prep.unit_module_lessons l ON l.unit_module_id = m.id
    LEFT JOIN exam_prep.lesson_practices p ON p.unit_module_lesson_id = l.id
    GROUP BY u.id
)
SELECT
    COUNT(*) OVER () AS total_count,
    u.id,
    u.catalog_course_id,
    u.name,
    u.description,
    u.thumbnail,
    u.sort_order,
    COALESCE(uc.modules_count, 0)::BIGINT AS modules_count,
    COALESCE(uc.lessons_count, 0)::BIGINT AS lessons_count,
    COALESCE(uc.practices_count, 0)::BIGINT AS practices_count,
    (COALESCE(uc.practices_count, 0)::BIGINT > 0) AS has_practice,
    u.created_at,
    u.updated_at
FROM exam_prep.units u
LEFT JOIN unit_counts uc ON uc.unit_id = u.id
WHERE
    u.catalog_course_id = $1
ORDER BY
    u.sort_order ASC,
    u.id ASC
LIMIT $2
OFFSET $3
`

type ExamPrepListUnitsByCatalogCourseParams struct {
	CatalogCourseID int64 `json:"catalog_course_id"`
	Limit           int32 `json:"limit"`
	Offset          int32 `json:"offset"`
}

type ExamPrepListUnitsByCatalogCourseRow struct {
	TotalCount      int64              `json:"total_count"`
	ID              int64              `json:"id"`
	CatalogCourseID int64              `json:"catalog_course_id"`
	Name            string             `json:"name"`
	Description     pgtype.Text        `json:"description"`
	Thumbnail       pgtype.Text        `json:"thumbnail"`
	SortOrder       int32              `json:"sort_order"`
	ModulesCount    int64              `json:"modules_count"`
	LessonsCount    int64              `json:"lessons_count"`
	PracticesCount  int64              `json:"practices_count"`
	HasPractice     bool               `json:"has_practice"`
	CreatedAt       pgtype.Timestamptz `json:"created_at"`
	UpdatedAt       pgtype.Timestamptz `json:"updated_at"`
}

func (q *Queries) ExamPrepListUnitsByCatalogCourse(ctx context.Context, arg ExamPrepListUnitsByCatalogCourseParams) ([]ExamPrepListUnitsByCatalogCourseRow, error) {
	rows, err := q.db.Query(ctx, ExamPrepListUnitsByCatalogCourse, arg.CatalogCourseID, arg.Limit, arg.Offset)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ExamPrepListUnitsByCatalogCourseRow
	for rows.Next() {
		var i ExamPrepListUnitsByCatalogCourseRow
		if err := rows.Scan(
			&i.TotalCount,
			&i.ID,
			&i.CatalogCourseID,
			&i.Name,
			&i.Description,
			&i.Thumbnail,
			&i.SortOrder,
			&i.ModulesCount,
			&i.LessonsCount,
			&i.PracticesCount,
			&i.HasPractice,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const ExamPrepUpdateUnit = `-- name: ExamPrepUpdateUnit :one
UPDATE exam_prep.units
SET
    name = coalesce($1::varchar, name),
    description = coalesce($2::text, description),
    thumbnail = coalesce($3::text, thumbnail),
    sort_order = coalesce($4::int, sort_order),
    updated_at = CURRENT_TIMESTAMP
WHERE id = $5
RETURNING
    id, catalog_course_id, name, description, thumbnail, sort_order, created_at, updated_at
`

type ExamPrepUpdateUnitParams struct {
	Name        pgtype.Text `json:"name"`
	Description pgtype.Text `json:"description"`
	Thumbnail   pgtype.Text `json:"thumbnail"`
	SortOrder   pgtype.Int4 `json:"sort_order"`
	ID          int64       `json:"id"`
}

func (q *Queries) ExamPrepUpdateUnit(ctx context.Context, arg ExamPrepUpdateUnitParams) (ExamPrepUnit, error) {
	row := q.db.QueryRow(ctx, ExamPrepUpdateUnit,
		arg.Name,
		arg.Description,
		arg.Thumbnail,
		arg.SortOrder,
		arg.ID,
	)
	var i ExamPrepUnit
	err := row.Scan(
		&i.ID,
		&i.CatalogCourseID,
		&i.Name,
		&i.Description,
		&i.Thumbnail,
		&i.SortOrder,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}