package user

import (
	"database/sql"
)

// PostgreSQL queries
const (
	// User queries
	postgresSelectUserByIDQuery = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE u.id = $1
	`
	postgresSelectUserByNameQuery = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE user_name = $1
	`
	postgresSelectUserByTokenQuery = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		JOIN user_token tk on u.id = tk.user_id
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE tk.token = $1 AND (tk.expires = 0 OR tk.expires >= $2)
	`
	postgresSelectUserByStripeCustomerIDQuery = `
		SELECT u.id, u.user_name, u.pass, u.role, u.prefs, u.sync_topic, u.provisioned, u.stats_messages, u.stats_emails, u.stats_calls, u.stripe_customer_id, u.stripe_subscription_id, u.stripe_subscription_status, u.stripe_subscription_interval, u.stripe_subscription_paid_until, u.stripe_subscription_cancel_at, u.deleted, t.id, t.code, t.name, t.messages_limit, t.messages_expiry_duration, t.emails_limit, t.calls_limit, t.reservations_limit, t.attachment_file_size_limit, t.attachment_total_size_limit, t.attachment_expiry_duration, t.attachment_bandwidth_limit, t.stripe_monthly_price_id, t.stripe_yearly_price_id
		FROM "user" u
		LEFT JOIN tier t on t.id = u.tier_id
		WHERE u.stripe_customer_id = $1
	`
	postgresSelectUsernamesQuery = `
		SELECT user_name
		FROM "user"
		ORDER BY
			CASE role
				WHEN 'admin' THEN 1
				WHEN 'anonymous' THEN 3
				ELSE 2
			END, user_name
	`
	postgresSelectUserCountQuery          = `SELECT COUNT(*) FROM "user"`
	postgresSelectUserIDFromUsernameQuery = `SELECT id FROM "user" WHERE user_name = $1`
	postgresInsertUserQuery               = `INSERT INTO "user" (id, user_name, pass, role, sync_topic, provisioned, created) VALUES ($1, $2, $3, $4, $5, $6, $7)`
	postgresUpdateUserPassQuery           = `UPDATE "user" SET pass = $1 WHERE user_name = $2`
	postgresUpdateUserRoleQuery           = `UPDATE "user" SET role = $1 WHERE user_name = $2`
	postgresUpdateUserProvisionedQuery    = `UPDATE "user" SET provisioned = $1 WHERE user_name = $2`
	postgresUpdateUserPrefsQuery          = `UPDATE "user" SET prefs = $1 WHERE id = $2`
	postgresUpdateUserStatsQuery          = `UPDATE "user" SET stats_messages = $1, stats_emails = $2, stats_calls = $3 WHERE id = $4`
	postgresUpdateUserStatsResetAllQuery  = `UPDATE "user" SET stats_messages = 0, stats_emails = 0, stats_calls = 0`
	postgresUpdateUserTierQuery           = `UPDATE "user" SET tier_id = (SELECT id FROM tier WHERE code = $1) WHERE user_name = $2`
	postgresUpdateUserDeletedQuery        = `UPDATE "user" SET deleted = $1 WHERE id = $2`
	postgresDeleteUserQuery               = `DELETE FROM "user" WHERE user_name = $1`
	postgresDeleteUserTierQuery           = `UPDATE "user" SET tier_id = null WHERE user_name = $1`
	postgresDeleteUsersMarkedQuery        = `DELETE FROM "user" WHERE deleted < $1`

	// Access queries
	postgresSelectTopicPermsQuery = `
		SELECT read, write
		FROM user_access a
		JOIN "user" u ON u.id = a.user_id
		WHERE (u.user_name = $1 OR u.user_name = $2) AND $3 LIKE a.topic ESCAPE '\'
		ORDER BY u.user_name DESC, LENGTH(a.topic) DESC, CASE WHEN a.write THEN 1 ELSE 0 END DESC
	`
	postgresSelectUserAllAccessQuery = `
		SELECT user_id, topic, read, write, provisioned
		FROM user_access
		ORDER BY LENGTH(topic) DESC, CASE WHEN write THEN 1 ELSE 0 END DESC, CASE WHEN read THEN 1 ELSE 0 END DESC, topic
	`
	postgresSelectUserAccessQuery = `
		SELECT topic, read, write, provisioned
		FROM user_access
		WHERE user_id = (SELECT id FROM "user" WHERE user_name = $1)
		ORDER BY LENGTH(topic) DESC, CASE WHEN write THEN 1 ELSE 0 END DESC, CASE WHEN read THEN 1 ELSE 0 END DESC, topic
	`
	postgresSelectUserReservationsQuery = `
		SELECT a_user.topic, a_user.read, a_user.write, a_everyone.read AS everyone_read, a_everyone.write AS everyone_write
		FROM user_access a_user
		LEFT JOIN  user_access a_everyone ON a_user.topic = a_everyone.topic AND a_everyone.user_id = (SELECT id FROM "user" WHERE user_name = $1)
		WHERE a_user.user_id = a_user.owner_user_id
		  AND a_user.owner_user_id = (SELECT id FROM "user" WHERE user_name = $2)
		ORDER BY a_user.topic
	`
	postgresSelectUserReservationsCountQuery = `
		SELECT COUNT(*)
		FROM user_access
		WHERE user_id = owner_user_id
		  AND owner_user_id = (SELECT id FROM "user" WHERE user_name = $1)
	`
	postgresSelectUserReservationsOwnerQuery = `
		SELECT owner_user_id
		FROM user_access
		WHERE topic = $1
		  AND user_id = owner_user_id
	`
	postgresSelectUserHasReservationQuery = `
		SELECT COUNT(*)
		FROM user_access
		WHERE user_id = owner_user_id
		  AND owner_user_id = (SELECT id FROM "user" WHERE user_name = $1)
		  AND topic = $2
	`
	postgresSelectOtherAccessCountQuery = `
		SELECT COUNT(*)
		FROM user_access
		WHERE (topic = $1 OR $2 LIKE topic ESCAPE '\')
		  AND (owner_user_id IS NULL OR owner_user_id != (SELECT id FROM "user" WHERE user_name = $3))
	`
	postgresUpsertUserAccessQuery = `
		INSERT INTO user_access (user_id, topic, read, write, owner_user_id, provisioned)
		VALUES (
			(SELECT id FROM "user" WHERE user_name = $1),
			$2,
			$3,
			$4,
			CASE WHEN $5 = '' THEN NULL ELSE (SELECT id FROM "user" WHERE user_name = $6) END,
			$7
		)
		ON CONFLICT (user_id, topic)
		DO UPDATE SET read=excluded.read, write=excluded.write, owner_user_id=excluded.owner_user_id, provisioned=excluded.provisioned
	`
	postgresDeleteUserAccessQuery = `
		DELETE FROM user_access
		WHERE user_id = (SELECT id FROM "user" WHERE user_name = $1)
		   OR owner_user_id = (SELECT id FROM "user" WHERE user_name = $2)
	`
	postgresDeleteUserAccessProvisionedQuery = `DELETE FROM user_access WHERE provisioned = true`
	postgresDeleteTopicAccessQuery           = `
		DELETE FROM user_access
	   	WHERE (user_id = (SELECT id FROM "user" WHERE user_name = $1) OR owner_user_id = (SELECT id FROM "user" WHERE user_name = $2))
	   	  AND topic = $3
  	`
	postgresDeleteAllAccessQuery = `DELETE FROM user_access`

	// Token queries
	postgresSelectTokenQuery                = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE user_id = $1 AND token = $2`
	postgresSelectTokensQuery               = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE user_id = $1`
	postgresSelectTokenCountQuery           = `SELECT COUNT(*) FROM user_token WHERE user_id = $1`
	postgresSelectAllProvisionedTokensQuery = `SELECT token, label, last_access, last_origin, expires, provisioned FROM user_token WHERE provisioned = true`
	postgresUpsertTokenQuery                = `
		INSERT INTO user_token (user_id, token, label, last_access, last_origin, expires, provisioned)
		VALUES ($1, $2, $3, $4, $5, $6, $7)
		ON CONFLICT (user_id, token)
		DO UPDATE SET label = excluded.label, expires = excluded.expires, provisioned = excluded.provisioned
	`
	postgresUpdateTokenQuery            = `UPDATE user_token SET label = $1, expires = $2 WHERE user_id = $3 AND token = $4`
	postgresUpdateTokenLastAccessQuery  = `UPDATE user_token SET last_access = $1, last_origin = $2 WHERE token = $3`
	postgresDeleteTokenQuery            = `DELETE FROM user_token WHERE user_id = $1 AND token = $2`
	postgresDeleteProvisionedTokenQuery = `DELETE FROM user_token WHERE token = $1`
	postgresDeleteAllTokenQuery         = `DELETE FROM user_token WHERE user_id = $1`
	postgresDeleteExpiredTokensQuery    = `DELETE FROM user_token WHERE expires > 0 AND expires < $1`
	postgresDeleteExcessTokensQuery     = `
		DELETE FROM user_token
		WHERE user_id = $1
		  AND (user_id, token) NOT IN (
			SELECT user_id, token
			FROM user_token
			WHERE user_id = $2
			ORDER BY expires DESC
			LIMIT $3
		)
	`

	// Tier queries
	postgresInsertTierQuery = `
		INSERT INTO tier (id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id)
		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)
	`
	postgresUpdateTierQuery = `
		UPDATE tier
		SET name = $1, messages_limit = $2, messages_expiry_duration = $3, emails_limit = $4, calls_limit = $5, reservations_limit = $6, attachment_file_size_limit = $7, attachment_total_size_limit = $8, attachment_expiry_duration = $9, attachment_bandwidth_limit = $10, stripe_monthly_price_id = $11, stripe_yearly_price_id = $12
		WHERE code = $13
	`
	postgresSelectTiersQuery = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
	`
	postgresSelectTierByCodeQuery = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
		WHERE code = $1
	`
	postgresSelectTierByPriceIDQuery = `
		SELECT id, code, name, messages_limit, messages_expiry_duration, emails_limit, calls_limit, reservations_limit, attachment_file_size_limit, attachment_total_size_limit, attachment_expiry_duration, attachment_bandwidth_limit, stripe_monthly_price_id, stripe_yearly_price_id
		FROM tier
		WHERE (stripe_monthly_price_id = $1 OR stripe_yearly_price_id = $2)
	`
	postgresDeleteTierQuery = `DELETE FROM tier WHERE code = $1`

	// Phone queries
	postgresSelectPhoneNumbersQuery = `SELECT phone_number FROM user_phone WHERE user_id = $1`
	postgresInsertPhoneNumberQuery  = `INSERT INTO user_phone (user_id, phone_number) VALUES ($1, $2)`
	postgresDeletePhoneNumberQuery  = `DELETE FROM user_phone WHERE user_id = $1 AND phone_number = $2`

	// Billing queries
	postgresUpdateBillingQuery = `
		UPDATE "user"
		SET stripe_customer_id = $1, stripe_subscription_id = $2, stripe_subscription_status = $3, stripe_subscription_interval = $4, stripe_subscription_paid_until = $5, stripe_subscription_cancel_at = $6
		WHERE user_name = $7
	`
)

// NewPostgresManager creates a new Manager backed by a PostgreSQL database using an existing connection pool.
func NewPostgresManager(db *sql.DB, config *Config) (*Manager, error) {
	if err := setupPostgres(db); err != nil {
		return nil, err
	}
	manager := &Manager{
		config: config,
		db:     db,
		queries: storeQueries{
			// User queries
			selectUserByID:               postgresSelectUserByIDQuery,
			selectUserByName:             postgresSelectUserByNameQuery,
			selectUserByToken:            postgresSelectUserByTokenQuery,
			selectUserByStripeCustomerID: postgresSelectUserByStripeCustomerIDQuery,
			selectUsernames:              postgresSelectUsernamesQuery,
			selectUserCount:              postgresSelectUserCountQuery,
			selectUserIDFromUsername:     postgresSelectUserIDFromUsernameQuery,
			insertUser:                   postgresInsertUserQuery,
			updateUserPass:               postgresUpdateUserPassQuery,
			updateUserRole:               postgresUpdateUserRoleQuery,
			updateUserProvisioned:        postgresUpdateUserProvisionedQuery,
			updateUserPrefs:              postgresUpdateUserPrefsQuery,
			updateUserStats:              postgresUpdateUserStatsQuery,
			updateUserStatsResetAll:      postgresUpdateUserStatsResetAllQuery,
			updateUserTier:               postgresUpdateUserTierQuery,
			updateUserDeleted:            postgresUpdateUserDeletedQuery,
			deleteUser:                   postgresDeleteUserQuery,
			deleteUserTier:               postgresDeleteUserTierQuery,
			deleteUsersMarked:            postgresDeleteUsersMarkedQuery,

			// Access queries
			selectTopicPerms:            postgresSelectTopicPermsQuery,
			selectUserAllAccess:         postgresSelectUserAllAccessQuery,
			selectUserAccess:            postgresSelectUserAccessQuery,
			selectUserReservations:      postgresSelectUserReservationsQuery,
			selectUserReservationsCount: postgresSelectUserReservationsCountQuery,
			selectUserReservationsOwner: postgresSelectUserReservationsOwnerQuery,
			selectUserHasReservation:    postgresSelectUserHasReservationQuery,
			selectOtherAccessCount:      postgresSelectOtherAccessCountQuery,
			upsertUserAccess:            postgresUpsertUserAccessQuery,
			deleteUserAccess:            postgresDeleteUserAccessQuery,
			deleteUserAccessProvisioned: postgresDeleteUserAccessProvisionedQuery,
			deleteTopicAccess:           postgresDeleteTopicAccessQuery,
			deleteAllAccess:             postgresDeleteAllAccessQuery,

			// Token queries
			selectToken:                postgresSelectTokenQuery,
			selectTokens:               postgresSelectTokensQuery,
			selectTokenCount:           postgresSelectTokenCountQuery,
			selectAllProvisionedTokens: postgresSelectAllProvisionedTokensQuery,
			upsertToken:                postgresUpsertTokenQuery,
			updateToken:                postgresUpdateTokenQuery,
			updateTokenLastAccess:      postgresUpdateTokenLastAccessQuery,
			deleteToken:                postgresDeleteTokenQuery,
			deleteProvisionedToken:     postgresDeleteProvisionedTokenQuery,
			deleteAllToken:             postgresDeleteAllTokenQuery,
			deleteExpiredTokens:        postgresDeleteExpiredTokensQuery,
			deleteExcessTokens:         postgresDeleteExcessTokensQuery,

			// Tier queries
			insertTier:          postgresInsertTierQuery,
			selectTiers:         postgresSelectTiersQuery,
			selectTierByCode:    postgresSelectTierByCodeQuery,
			selectTierByPriceID: postgresSelectTierByPriceIDQuery,
			updateTier:          postgresUpdateTierQuery,
			deleteTier:          postgresDeleteTierQuery,

			// Phone queries
			selectPhoneNumbers: postgresSelectPhoneNumbersQuery,
			insertPhoneNumber:  postgresInsertPhoneNumberQuery,
			deletePhoneNumber:  postgresDeletePhoneNumberQuery,

			// Billing queries
			updateBilling: postgresUpdateBillingQuery,
		},
	}
	if err := initManager(manager); err != nil {
		return nil, err
	}
	return manager, nil
}