-- Фаза 3: Отклики волонтеров и история статусов (СРЕДНИЙ ПРИОРИТЕТ)
-- Запросы для управления откликами волонтеров и историей изменения статусов заявок

-- ============================================================================
-- Отклики волонтеров
-- ============================================================================

-- name: CreateVolunteerResponse :one
INSERT INTO volunteer_responses (
    request_id,
    volunteer_id,
    message
) VALUES (
    $1,
    $2,
    $3
)
ON CONFLICT (request_id, volunteer_id) DO NOTHING
RETURNING *;

-- name: GetResponsesByRequest :many
SELECT
    vr.*,
    (u.first_name || ' ' || u.last_name) as volunteer_name,
    u.avatar_url as volunteer_avatar,
    u.volunteer_rating,
    u.completed_requests_count,
    u.email as volunteer_email,
    u.phone as volunteer_phone
FROM volunteer_responses vr
JOIN users u ON u.id = vr.volunteer_id
WHERE vr.request_id = $1
ORDER BY vr.created_at DESC;

-- name: GetResponsesByVolunteer :many
SELECT
    vr.*,
    r.title as request_title,
    r.status as request_status,
    (u.first_name || ' ' || u.last_name) as requester_name
FROM volunteer_responses vr
JOIN requests r ON r.id = vr.request_id
JOIN users u ON u.id = r.requester_id
WHERE vr.volunteer_id = $1
ORDER BY vr.created_at DESC
LIMIT $2 OFFSET $3;

-- name: GetResponseByID :one
SELECT
    vr.*,
    (u.first_name || ' ' || u.last_name) as volunteer_name,
    r.title as request_title
FROM volunteer_responses vr
JOIN users u ON u.id = vr.volunteer_id
JOIN requests r ON r.id = vr.request_id
WHERE vr.id = $1;

-- name: AcceptVolunteerResponse :exec
UPDATE volunteer_responses SET
    status = 'accepted',
    accepted_at = CURRENT_TIMESTAMP,
    updated_at = CURRENT_TIMESTAMP
WHERE id = $1;

-- name: RejectVolunteerResponse :exec
UPDATE volunteer_responses SET
    status = 'rejected',
    rejected_at = CURRENT_TIMESTAMP,
    updated_at = CURRENT_TIMESTAMP
WHERE id = $1;

-- name: CountResponsesByRequest :one
SELECT COUNT(*) FROM volunteer_responses
WHERE request_id = $1;

-- name: CountPendingResponsesByVolunteer :one
SELECT COUNT(*) FROM volunteer_responses
WHERE volunteer_id = $1 AND status = 'pending';

-- ============================================================================
-- История изменения статусов заявок
-- ============================================================================

-- name: CreateStatusHistoryEntry :one
INSERT INTO request_status_history (
    request_id,
    from_status,
    to_status,
    changed_by,
    comment
) VALUES (
    $1,
    $2,
    $3,
    $4,
    sqlc.narg('comment')
) RETURNING *;

-- name: GetRequestStatusHistory :many
SELECT
    rsh.*,
    (u.first_name || ' ' || u.last_name) as changed_by_name
FROM request_status_history rsh
JOIN users u ON u.id = rsh.changed_by
WHERE rsh.request_id = $1
ORDER BY rsh.created_at DESC;

-- name: GetLatestStatusChange :one
SELECT
    rsh.*,
    (u.first_name || ' ' || u.last_name) as changed_by_name
FROM request_status_history rsh
JOIN users u ON u.id = rsh.changed_by
WHERE rsh.request_id = $1
ORDER BY rsh.created_at DESC
LIMIT 1;

-- ============================================================================
-- Рейтинги
-- ============================================================================

-- name: CreateRating :one
INSERT INTO ratings (
    volunteer_response_id,
    volunteer_id,
    requester_id,
    request_id,
    rating,
    comment
) VALUES (
    $1,
    $2,
    $3,
    $4,
    $5,
    sqlc.narg('comment')
) RETURNING *;

-- name: GetRatingByResponseID :one
SELECT * FROM ratings
WHERE volunteer_response_id = $1;

-- name: GetRatingsByVolunteer :many
SELECT
    r.*,
    req.title as request_title,
    (u.first_name || ' ' || u.last_name) as requester_name
FROM ratings r
JOIN requests req ON req.id = r.request_id
JOIN users u ON u.id = r.requester_id
WHERE r.volunteer_id = $1
ORDER BY r.created_at DESC
LIMIT $2 OFFSET $3;

-- name: CalculateVolunteerAverageRating :one
SELECT
    COALESCE(AVG(rating), 0) as average_rating,
    COUNT(*) as total_ratings
FROM ratings
WHERE volunteer_id = $1;

-- name: UpdateRating :exec
UPDATE ratings SET
    rating = $2,
    comment = sqlc.narg('comment'),
    updated_at = CURRENT_TIMESTAMP
WHERE id = $1;

-- ============================================================================
-- Хранимые процедуры
-- ============================================================================

-- name: CallAcceptVolunteerResponse :one
SELECT
    r.success::BOOLEAN,
    r.message::TEXT,
    r.out_request_id::BIGINT,
    r.out_volunteer_id::BIGINT
FROM accept_volunteer_response($1, $2) AS r(success, message, out_request_id, out_volunteer_id);

-- name: CallCompleteRequestWithRating :one
SELECT
    r.success::BOOLEAN,
    r.message::TEXT,
    r.out_rating_id::BIGINT
FROM complete_request_with_rating($1, $2, $3, sqlc.narg('comment')) AS r(success, message, out_rating_id);

-- name: CallModerateRequest :one
SELECT
    r.success::BOOLEAN,
    r.message::TEXT
FROM moderate_request($1, $2, $3, sqlc.narg('comment')) AS r(success, message);