-- Migration 034: Deduplicate all lookup tables that have no UNIQUE on name/key/slug.
-- Root cause: INSERT OR IGNORE is ineffective without a UNIQUE constraint,
-- and schema.sql was applied repeatedly during broken-migration-runner era.

-- ── access_types ──
DELETE FROM access_types WHERE id NOT IN (SELECT MIN(id) FROM access_types GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_access_types_name_unique ON access_types(name);

-- ── ap_programs ──
DELETE FROM ap_programs WHERE id NOT IN (SELECT MIN(id) FROM ap_programs GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_ap_programs_name_unique ON ap_programs(name);

-- ── finality_types ──
DELETE FROM finality_types WHERE id NOT IN (SELECT MIN(id) FROM finality_types GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_finality_types_name_unique ON finality_types(name);

-- ── languages ──
DELETE FROM languages WHERE id NOT IN (SELECT MIN(id) FROM languages GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_languages_name_unique ON languages(name);

-- ── license_types ──
DELETE FROM license_types WHERE id NOT IN (SELECT MIN(id) FROM license_types GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_license_types_name_unique ON license_types(name);

-- ── orientations ──
DELETE FROM orientations WHERE id NOT IN (SELECT MIN(id) FROM orientations GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_orientations_name_unique ON orientations(name);

-- ── pages ──
DELETE FROM pages WHERE id NOT IN (SELECT MIN(id) FROM pages GROUP BY slug);
CREATE UNIQUE INDEX IF NOT EXISTS idx_pages_slug_unique ON pages(slug);

-- ── apropos_contents ──
DELETE FROM apropos_contents WHERE id NOT IN (SELECT MIN(id) FROM apropos_contents GROUP BY key);
CREATE UNIQUE INDEX IF NOT EXISTS idx_apropos_contents_key_unique ON apropos_contents(key);

-- ── tags ──
DELETE FROM tags WHERE id NOT IN (SELECT MIN(id) FROM tags GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_tags_name_unique ON tags(name);

-- ── supervisors ──
DELETE FROM supervisors WHERE id NOT IN (SELECT MIN(id) FROM supervisors GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_supervisors_name_unique ON supervisors(name);

-- ── format_types ── (re-run in case any crept back)
DELETE FROM format_types WHERE id NOT IN (SELECT MIN(id) FROM format_types GROUP BY name);
CREATE UNIQUE INDEX IF NOT EXISTS idx_format_types_name_unique ON format_types(name);

-- ── Clean up authors with empty email (soft-deleted or dummy rows)
-- These come from CSV import artefacts. Keep only the first per email.
DELETE FROM authors WHERE id NOT IN (SELECT MIN(id) FROM authors GROUP BY email);
CREATE UNIQUE INDEX IF NOT EXISTS idx_authors_email_unique ON authors(email);