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

package dbgen

import (
	"context"

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

const CreateCourse = `-- name: CreateCourse :one
INSERT INTO courses (program_id, name, description, thumbnail, sort_order)
SELECT
    $1,
    $2,
    $3,
    $4,
    COALESCE($5::int,
        COALESCE((
            SELECT
                max(c.sort_order)
            FROM courses c
            WHERE
                c.program_id = $1), 0) + 1)
RETURNING
    id, program_id, name, description, thumbnail, created_at, updated_at, sort_order
`

type CreateCourseParams struct {
	ProgramID   int64       `json:"program_id"`
	Name        string      `json:"name"`
	Description pgtype.Text `json:"description"`
	Thumbnail   pgtype.Text `json:"thumbnail"`
	SortOrder   pgtype.Int4 `json:"sort_order"`
}

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

const DeleteCourse = `-- name: DeleteCourse :exec
DELETE FROM courses
WHERE id = $1
`

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

const GetCourseByID = `-- name: GetCourseByID :one
SELECT
    c.id, c.program_id, c.name, c.description, c.thumbnail, c.created_at, c.updated_at, c.sort_order,
    EXISTS (
        SELECT 1
        FROM lms_practices p
        WHERE p.course_id = c.id
          AND p.module_id IS NULL
          AND p.lesson_id IS NULL
    ) AS has_practice
FROM courses
    c
WHERE c.id = $1
`

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

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

const ListCourseIDsByProgram = `-- name: ListCourseIDsByProgram :many
SELECT
    c.id
FROM
    courses AS c
WHERE
    c.program_id = $1
ORDER BY
    c.id
`

func (q *Queries) ListCourseIDsByProgram(ctx context.Context, programID int64) ([]int64, error) {
	rows, err := q.db.Query(ctx, ListCourseIDsByProgram, programID)
	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 ListCoursesByProgramID = `-- name: ListCoursesByProgramID :many
SELECT
    COUNT(*) OVER () AS total_count,
    c.id,
    c.program_id,
    c.name,
    c.description,
    c.thumbnail,
    c.sort_order,
    c.created_at,
    c.updated_at,
    (
        SELECT
            COUNT(*)::bigint
        FROM
            modules m
        WHERE
            m.course_id = c.id) AS module_count,
    (
        SELECT
            COUNT(*)::bigint
        FROM
            lessons l
            INNER JOIN modules m ON l.module_id = m.id
        WHERE
            m.course_id = c.id) AS lesson_count,
    -- Practices whose parent is the course only (lms_practices.course_id). Excludes
    -- practices linked via module_id or lesson_id, even for modules/lessons in this course.
    (
        SELECT
            COUNT(*)::bigint
        FROM
            lms_practices p
        WHERE
            p.course_id = c.id
            AND p.module_id IS NULL
            AND p.lesson_id IS NULL) AS practice_count,
    EXISTS (
        SELECT 1
        FROM lms_practices p
        WHERE p.course_id = c.id
          AND p.module_id IS NULL
          AND p.lesson_id IS NULL
    ) AS has_practice
FROM
    courses c
WHERE
    c.program_id = $1
ORDER BY
    c.sort_order ASC,
    c.id ASC
LIMIT $2 OFFSET $3
`

type ListCoursesByProgramIDParams struct {
	ProgramID int64 `json:"program_id"`
	Limit     int32 `json:"limit"`
	Offset    int32 `json:"offset"`
}

type ListCoursesByProgramIDRow struct {
	TotalCount    int64              `json:"total_count"`
	ID            int64              `json:"id"`
	ProgramID     int64              `json:"program_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"`
	ModuleCount   int64              `json:"module_count"`
	LessonCount   int64              `json:"lesson_count"`
	PracticeCount int64              `json:"practice_count"`
	HasPractice   bool               `json:"has_practice"`
}

func (q *Queries) ListCoursesByProgramID(ctx context.Context, arg ListCoursesByProgramIDParams) ([]ListCoursesByProgramIDRow, error) {
	rows, err := q.db.Query(ctx, ListCoursesByProgramID, arg.ProgramID, arg.Limit, arg.Offset)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	var items []ListCoursesByProgramIDRow
	for rows.Next() {
		var i ListCoursesByProgramIDRow
		if err := rows.Scan(
			&i.TotalCount,
			&i.ID,
			&i.ProgramID,
			&i.Name,
			&i.Description,
			&i.Thumbnail,
			&i.SortOrder,
			&i.CreatedAt,
			&i.UpdatedAt,
			&i.ModuleCount,
			&i.LessonCount,
			&i.PracticeCount,
			&i.HasPractice,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const UpdateCourse = `-- name: UpdateCourse :one
UPDATE courses
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, program_id, name, description, thumbnail, created_at, updated_at, sort_order
`

type UpdateCourseParams 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) UpdateCourse(ctx context.Context, arg UpdateCourseParams) (Course, error) {
	row := q.db.QueryRow(ctx, UpdateCourse,
		arg.Name,
		arg.Description,
		arg.Thumbnail,
		arg.SortOrder,
		arg.ID,
	)
	var i Course
	err := row.Scan(
		&i.ID,
		&i.ProgramID,
		&i.Name,
		&i.Description,
		&i.Thumbnail,
		&i.CreatedAt,
		&i.UpdatedAt,
		&i.SortOrder,
	)
	return i, err
}