package memory

// schema DDL。internal/db 中的迁移框架是领域表的权威
// 机制，但这里刻意不用它：db 包的迁移测试断言精确的
// 迁移数量，而记忆存储必须自包含、
// 可在任意 *sql.DB 上使用。表与索引因此
// 由 NewStore 幂等创建。
const createMemoryItemsTable = `
CREATE TABLE IF NOT EXISTS memory_items (
    id                  TEXT PRIMARY KEY,
    persona_id          TEXT NOT NULL,
    role_id             TEXT NOT NULL DEFAULT '',
    project_id          TEXT NOT NULL DEFAULT '',
    scope               TEXT NOT NULL,
    kind                TEXT NOT NULL,
    content             TEXT NOT NULL,
    tags                TEXT NOT NULL DEFAULT '[]',
    confidence          REAL NOT NULL DEFAULT 1.0,
    source_conversation TEXT NOT NULL DEFAULT '',
    created_at          TEXT NOT NULL,
    updated_at          TEXT NOT NULL,
    decay_weight        REAL NOT NULL DEFAULT 1.0,
    status              TEXT NOT NULL DEFAULT 'active',
    merged_into         TEXT NOT NULL DEFAULT '',
    merged_from         TEXT NOT NULL DEFAULT '[]',
    merge_count         INTEGER NOT NULL DEFAULT 1,
    occurred_at         TEXT NOT NULL DEFAULT '',
    valid_to            TEXT NOT NULL DEFAULT '',
    expires_at          TEXT NOT NULL DEFAULT ''
)`

const createMemoryItemsPersonaIndex = `
CREATE INDEX IF NOT EXISTS idx_memory_items_persona_id
    ON memory_items (persona_id)`

const createMemoryItemsPersonaCreatedIndex = `
CREATE INDEX IF NOT EXISTS idx_memory_items_persona_id_created_at
    ON memory_items (persona_id, created_at)`