-- SQLite Schema for Code-Forge
-- Replaces PostgreSQL with single-file SQLite database with vector support

-- Enable foreign keys
PRAGMA foreign_keys = ON;

-- Knowledge Bases (Collections)
CREATE TABLE IF NOT EXISTS knowledge_bases (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT UNIQUE NOT NULL,
    slug TEXT UNIQUE NOT NULL,
    kb_type TEXT NOT NULL DEFAULT 'generic',
    description TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    metadata TEXT DEFAULT '{}'  -- JSON string
);

CREATE INDEX IF NOT EXISTS idx_kb_name ON knowledge_bases(name);
CREATE INDEX IF NOT EXISTS idx_kb_slug ON knowledge_bases(slug);
CREATE INDEX IF NOT EXISTS idx_kb_type ON knowledge_bases(kb_type);
CREATE INDEX IF NOT EXISTS idx_kb_created_at ON knowledge_bases(created_at);

-- Documents with vector embeddings (using sqlite-vec extension)
-- sqlite-vec stores embeddings in a special format for efficient similarity search
CREATE TABLE IF NOT EXISTS documents (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    kb_id INTEGER NOT NULL,
    doc_id TEXT NOT NULL,
    content TEXT NOT NULL,
    embedding BLOB,  -- sqlite-vec binary format for 768-dim vectors
    metadata TEXT DEFAULT '{}',  -- JSON string
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(kb_id, doc_id),
    FOREIGN KEY (kb_id) REFERENCES knowledge_bases(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_doc_kb_id ON documents(kb_id);
CREATE INDEX IF NOT EXISTS idx_doc_doc_id ON documents(doc_id);

-- Agent OS specific content (optional)
CREATE TABLE IF NOT EXISTS agent_os_content (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    kb_id INTEGER NOT NULL,
    content_type TEXT NOT NULL,  -- standard, agent, workflow, command, product, spec
    name TEXT NOT NULL,
    content TEXT NOT NULL,
    file_path TEXT,
    metadata TEXT DEFAULT '{}',  -- JSON string
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(kb_id, content_type, name),
    FOREIGN KEY (kb_id) REFERENCES knowledge_bases(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_aos_kb_id ON agent_os_content(kb_id);
CREATE INDEX IF NOT EXISTS idx_aos_content_type ON agent_os_content(content_type);
CREATE INDEX IF NOT EXISTS idx_aos_name ON agent_os_content(name);

-- Projects (new - for Claude OS project management)
CREATE TABLE IF NOT EXISTS projects (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT UNIQUE NOT NULL,
    path TEXT UNIQUE NOT NULL,
    description TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    metadata TEXT DEFAULT '{}'  -- JSON: config, hooks, folder mappings
);

CREATE INDEX IF NOT EXISTS idx_project_name ON projects(name);
CREATE INDEX IF NOT EXISTS idx_project_path ON projects(path);

-- Project MCP Assignments (links projects to their 4 required MCPs)
CREATE TABLE IF NOT EXISTS project_mcps (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id INTEGER NOT NULL,
    kb_id INTEGER NOT NULL,
    mcp_type TEXT NOT NULL,  -- knowledge_docs, project_profile, project_index, project_memories
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(project_id, mcp_type),
    FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE,
    FOREIGN KEY (kb_id) REFERENCES knowledge_bases(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_pmcp_project_id ON project_mcps(project_id);
CREATE INDEX IF NOT EXISTS idx_pmcp_kb_id ON project_mcps(kb_id);
CREATE INDEX IF NOT EXISTS idx_pmcp_type ON project_mcps(mcp_type);

-- Project Folder Configuration (for selecting KB folders)
CREATE TABLE IF NOT EXISTS project_kb_folders (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id INTEGER NOT NULL,
    mcp_type TEXT NOT NULL,  -- knowledge_docs, project_profile, etc.
    folder_path TEXT NOT NULL,
    auto_sync INTEGER DEFAULT 0,  -- 0 = disabled, 1 = enabled
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(project_id, mcp_type),
    FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_pkf_project_id ON project_kb_folders(project_id);
CREATE INDEX IF NOT EXISTS idx_pkf_mcp_type ON project_kb_folders(mcp_type);

-- Knowledge Lifecycle Tracking (for dedup, consolidation, archival audit log)
CREATE TABLE IF NOT EXISTS lifecycle_log (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    kb_name TEXT NOT NULL,
    operation_type TEXT NOT NULL,       -- dedup_scan, dedup_merge, consolidate, archive, restore
    status TEXT NOT NULL DEFAULT 'pending',
    input_doc_ids TEXT DEFAULT '[]',    -- JSON array
    output_doc_ids TEXT DEFAULT '[]',   -- JSON array
    details TEXT DEFAULT '{}',          -- JSON blob
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    completed_at TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_lifecycle_kb ON lifecycle_log(kb_name);
CREATE INDEX IF NOT EXISTS idx_lifecycle_op ON lifecycle_log(operation_type);