PRAGMA foreign_keys = ON;

CREATE TABLE IF NOT EXISTS "auth_user" (
  "id" TEXT PRIMARY KEY,
  "name" TEXT NOT NULL,
  "email" TEXT NOT NULL UNIQUE,
  "email_verified" BOOLEAN NOT NULL DEFAULT 0,
  "image" TEXT,
  "role" TEXT NOT NULL DEFAULT 'owner',
  "type" TEXT NOT NULL DEFAULT 'candidate',
  "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "auth_session" (
  "id" TEXT PRIMARY KEY,
  "expires_at" TIMESTAMP NOT NULL,
  "token" TEXT NOT NULL UNIQUE,
  "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "ip_address" TEXT,
  "user_agent" TEXT,
  "user_id" TEXT NOT NULL REFERENCES "auth_user"("id") ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS "auth_account" (
  "id" TEXT PRIMARY KEY,
  "account_id" TEXT NOT NULL,
  "provider_id" TEXT NOT NULL,
  "user_id" TEXT NOT NULL REFERENCES "auth_user"("id") ON DELETE CASCADE,
  "access_token" TEXT,
  "refresh_token" TEXT,
  "id_token" TEXT,
  "access_token_expires_at" TIMESTAMP,
  "refresh_token_expires_at" TIMESTAMP,
  "scope" TEXT,
  "password" TEXT,
  "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  UNIQUE ("provider_id", "account_id")
);

CREATE TABLE IF NOT EXISTS "auth_verification" (
  "id" TEXT PRIMARY KEY,
  "identifier" TEXT NOT NULL,
  "value" TEXT NOT NULL,
  "expires_at" TIMESTAMP NOT NULL,
  "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "countries" (
  "iso3" CHAR(3) PRIMARY KEY,
  "iso2" CHAR(2) NOT NULL,
  "name" TEXT NOT NULL,
  "name_br" TEXT,
  "name_ko" TEXT,
  "name_pt_br" TEXT,
  "name_pt" TEXT,
  "name_nl" TEXT,
  "name_hr" TEXT,
  "name_fa" TEXT,
  "name_de" TEXT,
  "name_es" TEXT,
  "name_fr" TEXT,
  "name_ja" TEXT,
  "name_it" TEXT,
  "name_zh_cn" TEXT,
  "name_tr" TEXT,
  "name_ru" TEXT,
  "name_uk" TEXT,
  "name_pl" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "user" (
  "user_id" TEXT PRIMARY KEY,
  "email" TEXT NOT NULL UNIQUE,
  "name" TEXT NOT NULL,
  "email_verified_at" TIMESTAMP,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "role" TEXT NOT NULL,
  "type" TEXT NOT NULL,
  "email_verification_token" TEXT
);

CREATE TABLE IF NOT EXISTS "user_auth" (
  "user_id" TEXT PRIMARY KEY REFERENCES "user"("user_id") ON DELETE CASCADE,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "magic_link" TEXT
);

CREATE TABLE IF NOT EXISTS "candidate" (
  "candidate_id" TEXT PRIMARY KEY,
  "email" TEXT NOT NULL UNIQUE,
  "name" TEXT NOT NULL,
  "state_work_preference" ARRAY,
  "join_talent_pool" BOOLEAN,
  "living_in_germany" BOOLEAN,
  "eu_passport" BOOLEAN,
  "country_education" TEXT REFERENCES "countries"("iso3"),
  "license_provided" BOOLEAN,
  "language_certificate_provided" BOOLEAN,
  "language_self_assessment_level" TEXT,
  "submitted_at" TIMESTAMP,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "phone" TEXT,
  "date_of_birth" DATE,
  "current_residence" TEXT,
  "qualification_status_home_country" TEXT,
  "qualification_status_germany" TEXT,
  "license_mandatory" BOOLEAN,
  "duration_requirements_met" BOOLEAN,
  "status" TEXT NOT NULL DEFAULT 'Initial',
  "incomplete_reminder_sent_at" TIMESTAMP,
  "recognition_likelihood" TEXT,
  "professional_recognition_status" TEXT,
  "nationality" TEXT,
  "languages_spoken" ARRAY,
  "status_changed_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "lifecycle_notifications" JSON NOT NULL DEFAULT '{}',
  "analysis_last_run_at" TIMESTAMP,
  "analysis_input_fingerprint" TEXT,
  "invalidated_at" TIMESTAMP,
  "reupload_requested_at" TIMESTAMP,
  "reuploaded_at" TIMESTAMP,
  "failed_purged_at" TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "candidate_document" (
  "document_id" TEXT PRIMARY KEY,
  "candidate_id" TEXT NOT NULL REFERENCES "candidate"("candidate_id") ON DELETE CASCADE,
  "category" TEXT NOT NULL,
  "title" TEXT,
  "note" TEXT,
  "file_path" TEXT NOT NULL,
  "file_name" TEXT NOT NULL,
  "file_size" INTEGER,
  "mime_type" TEXT,
  "uploaded" BOOLEAN DEFAULT 0,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "ocr_text" TEXT,
  "ocr_model" TEXT,
  "ocr_started_at" TIMESTAMP,
  "ocr_ended_at" TIMESTAMP,
  "document_status" TEXT NOT NULL DEFAULT 'Unverified'
);

CREATE TABLE IF NOT EXISTS "candidate_education" (
  "education_id" TEXT PRIMARY KEY,
  "candidate_id" TEXT NOT NULL UNIQUE REFERENCES "candidate"("candidate_id") ON DELETE CASCADE,
  "institution" TEXT,
  "country" TEXT,
  "program" TEXT,
  "completion_date" DATE,
  "ai_institution" TEXT,
  "ai_country" TEXT,
  "ai_program" TEXT,
  "ai_completion_date" DATE,
  "ai_extracted_by" TEXT,
  "ai_extraction_date" TIMESTAMP,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "nursing_related_degree" BOOLEAN,
  "accredited_university" BOOLEAN,
  "accredited_study_program" BOOLEAN,
  "ai_nursing_related_degree" BOOLEAN,
  "ai_accredited_university" BOOLEAN,
  "ai_accredited_study_program" BOOLEAN,
  "has_theory" BOOLEAN,
  "has_practice" BOOLEAN,
  "duration_hours" INTEGER,
  "is_nursing_focus" BOOLEAN,
  "ai_has_theory" BOOLEAN,
  "ai_has_practice" BOOLEAN,
  "ai_duration_hours" INTEGER,
  "ai_is_nursing_focus" BOOLEAN
);

CREATE TABLE IF NOT EXISTS "candidate_license" (
  "license_id" TEXT PRIMARY KEY,
  "candidate_id" TEXT NOT NULL UNIQUE REFERENCES "candidate"("candidate_id") ON DELETE CASCADE,
  "license_number" TEXT,
  "issuing_authority" TEXT,
  "issue_date" DATE,
  "expiry_date" DATE,
  "status" TEXT,
  "license_type" TEXT,
  "ai_license_number" TEXT,
  "ai_issuing_authority" TEXT,
  "ai_issue_date" DATE,
  "ai_expiry_date" DATE,
  "ai_status" TEXT,
  "ai_license_type" TEXT,
  "ai_extracted_by" TEXT,
  "ai_extraction_date" TIMESTAMP,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "candidate_language" (
  "language_id" TEXT PRIMARY KEY,
  "candidate_id" TEXT NOT NULL UNIQUE REFERENCES "candidate"("candidate_id") ON DELETE CASCADE,
  "level" TEXT,
  "issuing_body" TEXT,
  "issue_date" DATE,
  "certified_skills" ARRAY,
  "ai_level" TEXT,
  "ai_issuing_body" TEXT,
  "ai_issue_date" DATE,
  "ai_certified_skills" ARRAY,
  "ai_extracted_by" TEXT,
  "ai_extraction_date" TIMESTAMP,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "candidate_experience" (
  "experience_id" TEXT PRIMARY KEY,
  "candidate_id" TEXT NOT NULL UNIQUE REFERENCES "candidate"("candidate_id") ON DELETE CASCADE,
  "employer_name" TEXT,
  "role_title" TEXT,
  "department" TEXT,
  "start_date" DATE,
  "end_date" DATE,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "country" TEXT,
  "city" TEXT,
  "facility_type" TEXT
);

CREATE TABLE IF NOT EXISTS "leads" (
  "lead_id" TEXT PRIMARY KEY,
  "first_name" TEXT NOT NULL,
  "last_name" TEXT NOT NULL,
  "email" TEXT NOT NULL,
  "phone" TEXT,
  "facility_name" TEXT NOT NULL,
  "facility_type" TEXT NOT NULL,
  "nurses_needed_range" TEXT,
  "message" TEXT,
  "source" TEXT NOT NULL DEFAULT 'pilot',
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "country" (
  "country_id" TEXT PRIMARY KEY,
  "iso_code" TEXT NOT NULL,
  "name_english" TEXT NOT NULL,
  "name_official" TEXT,
  "name_short" TEXT,
  "publicated" BOOLEAN NOT NULL,
  "hidden" BOOLEAN,
  "country_group" TEXT NOT NULL,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "location" (
  "location_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "country_id" TEXT NOT NULL REFERENCES "country"("country_id") ON DELETE CASCADE,
  "origin_name" TEXT NOT NULL,
  "name_short" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "institution_type" (
  "institution_type_id" TEXT PRIMARY KEY,
  "name_short" TEXT,
  "status" TEXT,
  "comment" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "institution" (
  "institution_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "country_id" TEXT NOT NULL REFERENCES "country"("country_id") ON DELETE CASCADE,
  "location_id" TEXT REFERENCES "location"("location_id") ON DELETE SET NULL,
  "institution_type_id" TEXT NOT NULL REFERENCES "institution_type"("institution_type_id") ON DELETE CASCADE,
  "name_short" TEXT,
  "abbreviation" TEXT,
  "homepage" TEXT,
  "name_german" TEXT,
  "address_street" TEXT,
  "address_zip" TEXT,
  "address_city" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "degree_type" (
  "degree_type_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "country_id" TEXT NOT NULL REFERENCES "country"("country_id") ON DELETE CASCADE,
  "name_short" TEXT,
  "name_german" TEXT,
  "name_female" TEXT,
  "name_female_german" TEXT,
  "comment" TEXT,
  "hide_requirement" BOOLEAN,
  "requirement" TEXT,
  "additional_requirement" TEXT,
  "hide_studies" BOOLEAN,
  "studies_min_length" REAL,
  "studies_max_length" REAL,
  "explanation_studies_length" TEXT,
  "studies_description" TEXT,
  "abbreviation" TEXT,
  "abbreviation_female" TEXT,
  "degree_class" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "degree_type_equivalence" (
  "degree_type_equivalence_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "degree_type_id" TEXT NOT NULL REFERENCES "degree_type"("degree_type_id") ON DELETE CASCADE,
  "hidden" BOOLEAN,
  "equivalence_class" TEXT NOT NULL,
  "comment" TEXT,
  "admin_comment" TEXT,
  "internal_comment" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "degree_field_of_study" (
  "degree_field_of_study_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "country_id" TEXT NOT NULL REFERENCES "country"("country_id") ON DELETE CASCADE,
  "name_short" TEXT,
  "name_german" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "degree" (
  "degree_id" TEXT PRIMARY KEY,
  "id_original" TEXT NOT NULL,
  "country_id" TEXT NOT NULL REFERENCES "country"("country_id") ON DELETE CASCADE,
  "degree_type_id" TEXT REFERENCES "degree_type"("degree_type_id") ON DELETE SET NULL,
  "field_of_study_id" TEXT REFERENCES "degree_field_of_study"("degree_field_of_study_id") ON DELETE SET NULL,
  "degree_short" TEXT,
  "name_short" TEXT,
  "name_german" TEXT,
  "name_female" TEXT,
  "name_female_german" TEXT,
  "comment" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "alias_name" (
  "alias_name_id" TEXT PRIMARY KEY,
  "type" TEXT NOT NULL,
  "id_original" TEXT NOT NULL,
  "name_short" TEXT,
  "name_german" TEXT,
  "comment" TEXT,
  "hidden" BOOLEAN,
  "deleted" BOOLEAN,
  "language_id" TEXT,
  "name_translated" TEXT,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE TABLE IF NOT EXISTS "institution_degree" (
  "institution_id" TEXT NOT NULL REFERENCES "institution"("institution_id") ON DELETE CASCADE,
  "degree_id" TEXT NOT NULL REFERENCES "degree"("degree_id") ON DELETE CASCADE,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY ("institution_id", "degree_id")
);

CREATE TABLE IF NOT EXISTS "degree_equivalence" (
  "degree_id" TEXT NOT NULL REFERENCES "degree"("degree_id") ON DELETE CASCADE,
  "equivalence_id" TEXT NOT NULL REFERENCES "degree_type_equivalence"("degree_type_equivalence_id") ON DELETE CASCADE,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY ("degree_id", "equivalence_id")
);

CREATE TABLE IF NOT EXISTS "degree_type_equivalence_link" (
  "degree_type_id" TEXT NOT NULL REFERENCES "degree_type"("degree_type_id") ON DELETE CASCADE,
  "equivalence_id" TEXT NOT NULL REFERENCES "degree_type_equivalence"("degree_type_equivalence_id") ON DELETE CASCADE,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY ("degree_type_id", "equivalence_id")
);

CREATE TABLE IF NOT EXISTS "entity_name_link" (
  "entity_type" TEXT NOT NULL,
  "entity_id" TEXT NOT NULL,
  "name_id" TEXT NOT NULL REFERENCES "alias_name"("alias_name_id") ON DELETE CASCADE,
  "name_type" TEXT NOT NULL,
  "created_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  "last_updated_at" TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY ("entity_type", "entity_id", "name_id")
);

CREATE INDEX IF NOT EXISTS "idx_auth_session_user_id" ON "auth_session" ("user_id");
CREATE INDEX IF NOT EXISTS "idx_auth_account_user_id" ON "auth_account" ("user_id");
CREATE INDEX IF NOT EXISTS "idx_auth_verification_identifier" ON "auth_verification" ("identifier");
CREATE INDEX IF NOT EXISTS "idx_candidate_status_changed_at" ON "candidate" ("status", "status_changed_at");
CREATE INDEX IF NOT EXISTS "idx_candidate_reupload_flags" ON "candidate" ("invalidated_at", "reuploaded_at");
CREATE INDEX IF NOT EXISTS "idx_candidate_document_candidate_id" ON "candidate_document" ("candidate_id");
CREATE UNIQUE INDEX IF NOT EXISTS "idx_candidate_document_profile_image_unique"
  ON "candidate_document" ("candidate_id")
  WHERE "category" = 'profile_image';

CREATE VIEW IF NOT EXISTS "institution_search" AS
SELECT
  i.institution_id,
  i.name_short AS main_name_short,
  i.name_german AS main_name_german,
  a.name_short AS alias_name_short,
  a.name_german AS alias_name_german,
  enl.name_type AS alias_type
FROM "institution" i
LEFT JOIN "entity_name_link" enl
  ON enl.entity_type = 'institution'
 AND enl.entity_id = i.institution_id
LEFT JOIN "alias_name" a
  ON a.alias_name_id = enl.name_id;

CREATE VIEW IF NOT EXISTS "degree_search" AS
SELECT
  d.degree_id,
  d.name_short AS main_name_short,
  d.name_german AS main_name_german,
  a.name_short AS alias_name_short,
  a.name_german AS alias_name_german,
  enl.name_type AS alias_type
FROM "degree" d
LEFT JOIN "entity_name_link" enl
  ON enl.entity_type = 'degree'
 AND enl.entity_id = d.degree_id
LEFT JOIN "alias_name" a
  ON a.alias_name_id = enl.name_id;