package store

// All SQL used by the store, grouped by table in migration order.
//
// Conventions:
//   - Statements are named <verb><Subject>, e.g. insertRelease. Fragments
//     combined at run time are named after what they build (listOpportunities*,
//     filterOpportunity*).
//   - Named-parameter statements (":column", bound from a struct's db tags)
//     say so in their comment. Everything else uses "?" placeholders.
//   - Reads select whole rows (*, t.*, c.*) so a column added by a migration
//     but not mapped to a struct field fails loudly; see opportunityRow.
//   - Keep comments out of the SQL strings: sqlx reads a colon followed by a
//     name as a parameter, even inside an SQL comment.
//   - Every constant here is prepared against the migrated schema by
//     TestQueriesPrepare (queries_test.go), which also fails if a constant is
//     added without being listed there.

// ---------- opportunities ----------

// selectOpportunityLatestReleaseDate reads the date SaveOpportunity compares
// against.
const selectOpportunityLatestReleaseDate = `
SELECT latest_release_date FROM opportunities WHERE uuid = ?`

// selectSourceLatestReleaseDate reads the newest latest_release_date of one
// source's opportunities. ORDER BY rather than MAX keeps the column's DATETIME
// type, so the driver reads it as a time; it walks the latest_release_date
// index.
const selectSourceLatestReleaseDate = `
SELECT latest_release_date FROM opportunities
WHERE source = ?
ORDER BY latest_release_date DESC
LIMIT 1`

// upsertOpportunity inserts or updates a opportunity. Named parameters
// (types.Opportunity).
//
// An UPDATE on conflict, not a REPLACE: REPLACE would delete the row first,
// cascading to the opportunity's releases and changing its id.
const upsertOpportunity = `
INSERT INTO opportunities (
	uuid, uuid_type, title, status, description, buyer_name, buyer_id,
	main_category, procurement_method, multi_lot, sme_suitable,
	vcse_suitable, start_date, end_date, gross_value, has_documents, source,
	latest_release_date
) VALUES (
	:uuid, :uuid_type, :title, :status, :description, :buyer_name, :buyer_id,
	:main_category, :procurement_method, :multi_lot, :sme_suitable,
	:vcse_suitable, :start_date, :end_date, :gross_value, :has_documents,
	:source, :latest_release_date
)
ON CONFLICT (uuid) DO UPDATE SET
	uuid_type = excluded.uuid_type,
	title = excluded.title,
	status = excluded.status,
	description = excluded.description,
	buyer_name = excluded.buyer_name,
	buyer_id = excluded.buyer_id,
	main_category = excluded.main_category,
	procurement_method = excluded.procurement_method,
	multi_lot = excluded.multi_lot,
	sme_suitable = excluded.sme_suitable,
	vcse_suitable = excluded.vcse_suitable,
	start_date = excluded.start_date,
	end_date = excluded.end_date,
	gross_value = excluded.gross_value,
	has_documents = excluded.has_documents,
	source = excluded.source,
	latest_release_date = excluded.latest_release_date`

// selectOpportunityByUUID reads one opportunity into a opportunityRow.
const selectOpportunityByUUID = `
SELECT t.* FROM opportunities t WHERE t.uuid = ?`

// ListOpportunities is assembled by listOpportunitiesQuery as:
//
//	listOpportunitiesSelect
//	[WHERE filter AND filter ...]
//	listOpportunitiesOrderAndPage
//
// Each filterOpportunity* fragment takes exactly one "?" argument, except
// filterOpportunityMark* fragments, which take none. A mark fragment is true
// when the mark is set and is negated with NOT to match it unset; an
// opportunity with no marks row has every mark unset.
const (
	// listOpportunitiesSelect selects every opportunity, as t.
	listOpportunitiesSelect = `
SELECT t.* FROM opportunities t`

	// listOpportunitiesOrderAndPage orders by latest release, newest first,
	// and takes a page: the limit and offset arguments.
	listOpportunitiesOrderAndPage = `
ORDER BY t.latest_release_date DESC, t.uuid
LIMIT ? OFFSET ?`

	// filterOpportunityStatus matches a status.
	filterOpportunityStatus = `t.status = ?`

	// filterOpportunityClassificationCode matches a classification code.
	filterOpportunityClassificationCode = `EXISTS (
	SELECT 1
	FROM opportunity_classifications tc
	JOIN classification_codes c ON c.id = tc.classification_id
	WHERE tc.opportunity_uuid = t.uuid AND c.code = ?
)`

	// filterOpportunityTitleMatch matches a full-text search of the title. The
	// argument must come from ftsQuery, never raw user input.
	filterOpportunityTitleMatch = `t.id IN (
	SELECT rowid FROM opportunities_fts WHERE opportunities_fts MATCH ?
)`

	// filterOpportunityReleasedFrom matches a latest release on or after a
	// time.
	filterOpportunityReleasedFrom = `t.latest_release_date >= ?`

	// filterOpportunityReleasedBefore matches a latest release before a time.
	filterOpportunityReleasedBefore = `t.latest_release_date < ?`

	// filterOpportunityMarkHidden matches the hidden mark set.
	filterOpportunityMarkHidden = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.hidden
)`

	// filterOpportunityMarkSkipped matches the skipped mark set.
	filterOpportunityMarkSkipped = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.skipped
)`

	// filterOpportunityMarkInterested matches the interested mark set.
	filterOpportunityMarkInterested = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.interested
)`

	// filterOpportunityMarkBidSubmitted matches the bid submitted mark set.
	filterOpportunityMarkBidSubmitted = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.bid_submitted
)`

	// filterOpportunityMarkWon matches the won mark set.
	filterOpportunityMarkWon = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.won
)`

	// filterOpportunityMarkLost matches the lost mark set.
	filterOpportunityMarkLost = `EXISTS (
	SELECT 1 FROM opportunity_marks m WHERE m.uuid = t.uuid AND m.lost
)`
)

// ---------- opportunity_releases ----------

// insertRelease stores a release; 0 rows affected means it was already
// stored. Named parameters (types.OCDSReleaseJSON).
const insertRelease = `
INSERT INTO opportunity_releases (uuid, release_id, release_date, data)
VALUES (:uuid, :release_id, :release_date, :data)
ON CONFLICT DO NOTHING`

// selectReleasesByOpportunity reads a opportunity's releases, oldest first.
const selectReleasesByOpportunity = `
SELECT *
FROM opportunity_releases
WHERE uuid = ?
ORDER BY release_date, release_id`

// selectReleaseExists returns a single boolean.
const selectReleaseExists = `
SELECT EXISTS (
	SELECT 1 FROM opportunity_releases WHERE uuid = ? AND release_id = ?
)`

// ---------- opportunity_release_tags ----------

// insertReleaseTag stores a tag. Named parameters (types.OCDSReleaseTags).
const insertReleaseTag = `
INSERT INTO opportunity_release_tags (uuid, release_id, tag)
VALUES (:uuid, :release_id, :tag)
ON CONFLICT DO NOTHING`

// selectReleaseTagsByOpportunity reads the tags of all of a opportunity's
// releases.
const selectReleaseTagsByOpportunity = `
SELECT *
FROM opportunity_release_tags
WHERE uuid = ?
ORDER BY release_id, tag`

// ---------- classification_codes ----------

// upsertClassificationCodeReturningID returns the id of the row matching
// every content column, inserting it first if needed. Named parameters
// (types.ClassificationCode).
//
// The no-op DO UPDATE (rather than DO NOTHING) makes RETURNING yield the
// existing row's id on conflict.
const upsertClassificationCodeReturningID = `
INSERT INTO classification_codes (is_cpv, code, classification)
VALUES (:is_cpv, :code, :classification)
ON CONFLICT (is_cpv, code, classification)
	DO UPDATE SET is_cpv = excluded.is_cpv
RETURNING id`

// ---------- opportunity_classifications ----------

// deleteOpportunityClassifications clears a opportunity's mappings before they
// are rewritten.
const deleteOpportunityClassifications = `
DELETE FROM opportunity_classifications WHERE opportunity_uuid = ?`

// insertOpportunityClassification maps a opportunity to a classification code.
const insertOpportunityClassification = `
INSERT INTO opportunity_classifications (opportunity_uuid, classification_id)
VALUES (?, ?)
ON CONFLICT DO NOTHING`

// selectClassificationsInUse reads every classification code that at least
// one opportunity has, once each. c.* must map entirely onto
// types.ClassificationCode.
const selectClassificationsInUse = `
SELECT c.* FROM classification_codes c
WHERE EXISTS (
	SELECT 1 FROM opportunity_classifications tc
	WHERE tc.classification_id = c.id
)
ORDER BY c.code, c.id`

// selectClassificationsForOpportunities reads the classifications of several
// opportunities. "IN (?)" is expanded by sqlx.In, which must be followed by
// Rebind. c.* must map entirely onto types.ClassificationCode.
const selectClassificationsForOpportunities = `
SELECT tc.opportunity_uuid, c.*
FROM opportunity_classifications tc
JOIN classification_codes c ON c.id = tc.classification_id
WHERE tc.opportunity_uuid IN (?)
ORDER BY tc.opportunity_uuid, c.code, c.id`

// ---------- opportunity_marks ----------

// insertOpportunityMarks gives a new opportunity its marks row; an existing
// row is left alone, so saving fetched data never resets marks set by the
// user. Named parameters (types.OpportunityMarks).
const insertOpportunityMarks = `
INSERT INTO opportunity_marks (
	uuid, hidden, interested, skipped, bid_submitted, won, lost
)
VALUES (
	:uuid, :hidden, :interested, :skipped, :bid_submitted, :won, :lost
)
ON CONFLICT (uuid) DO NOTHING`

// upsertOpportunityMarks inserts or updates an opportunity's marks. Named
// parameters (types.OpportunityMarks).
//
// An UPDATE on conflict, not a REPLACE: REPLACE would delete the row first
// which is unnecessary.
const upsertOpportunityMarks = `
INSERT INTO opportunity_marks (
	uuid, hidden, interested, skipped, bid_submitted, won, lost
)
VALUES (
	:uuid, :hidden, :interested, :skipped, :bid_submitted, :won, :lost
)
ON CONFLICT (uuid) DO UPDATE SET
	hidden = excluded.hidden,
	interested = excluded.interested,
	skipped = excluded.skipped,
	bid_submitted = excluded.bid_submitted,
	won = excluded.won,
	lost = excluded.lost`

// selectMarksForOpportunities reads the marks of several opportunities.
// "IN (?)" is expanded by sqlx.In, which must be followed by Rebind.
const selectMarksForOpportunities = `
SELECT *
FROM opportunity_marks
WHERE uuid IN (?)
ORDER BY uuid`