"""
Kin — SQLite database schema and connection management.
All tables from DESIGN.md section 3.5 State Management.
"""

import sqlite3
from pathlib import Path

DB_PATH = Path(__file__).parent.parent / "kin.db"

SCHEMA = """
-- Проекты (центральный реестр)
CREATE TABLE IF NOT EXISTS projects (
    id TEXT PRIMARY KEY,
    name TEXT NOT NULL,
    path TEXT NOT NULL,
    tech_stack JSON,
    status TEXT DEFAULT 'active',
    priority INTEGER DEFAULT 5,
    pm_prompt TEXT,
    claude_md_path TEXT,
    forgejo_repo TEXT,
    language TEXT DEFAULT 'ru',
    execution_mode TEXT NOT NULL DEFAULT 'review',
    deploy_command TEXT,
    project_type TEXT DEFAULT 'development',
    ssh_host TEXT,
    ssh_user TEXT,
    ssh_key_path TEXT,
    ssh_proxy_jump TEXT,
    description TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- Задачи (привязаны к проекту)
CREATE TABLE IF NOT EXISTS tasks (
    id TEXT PRIMARY KEY,
    project_id TEXT NOT NULL REFERENCES projects(id),
    title TEXT NOT NULL,
    status TEXT DEFAULT 'pending',
    priority INTEGER DEFAULT 5,
    assigned_role TEXT,
    parent_task_id TEXT REFERENCES tasks(id),
    brief JSON,
    spec JSON,
    review JSON,
    test_result JSON,
    security_result JSON,
    forgejo_issue_id INTEGER,
    execution_mode TEXT,
    blocked_reason TEXT,
    blocked_at DATETIME,
    blocked_agent_role TEXT,
    blocked_pipeline_step TEXT,
    dangerously_skipped BOOLEAN DEFAULT 0,
    revise_comment TEXT,
    category TEXT DEFAULT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- Решения и грабли (внешняя память PM-агента)
CREATE TABLE IF NOT EXISTS decisions (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    task_id TEXT REFERENCES tasks(id),
    type TEXT NOT NULL,
    category TEXT,
    title TEXT NOT NULL,
    description TEXT NOT NULL,
    tags JSON,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- Логи агентов (дебаг, обучение, cost tracking)
CREATE TABLE IF NOT EXISTS agent_logs (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    task_id TEXT REFERENCES tasks(id),
    agent_role TEXT NOT NULL,
    session_id TEXT,
    action TEXT NOT NULL,
    input_summary TEXT,
    output_summary TEXT,
    tokens_used INTEGER,
    model TEXT,
    cost_usd REAL,
    success BOOLEAN,
    error_message TEXT,
    duration_seconds INTEGER,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- Модули проекта (карта для PM)
CREATE TABLE IF NOT EXISTS modules (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    name TEXT NOT NULL,
    type TEXT NOT NULL,
    path TEXT NOT NULL,
    description TEXT,
    owner_role TEXT,
    dependencies JSON,
    UNIQUE(project_id, name)
);

-- Фазы исследования нового проекта (research workflow KIN-059)
CREATE TABLE IF NOT EXISTS project_phases (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    role TEXT NOT NULL,
    phase_order INTEGER NOT NULL,
    status TEXT DEFAULT 'pending',
    task_id TEXT REFERENCES tasks(id),
    revise_count INTEGER DEFAULT 0,
    revise_comment TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS idx_phases_project ON project_phases(project_id, phase_order);

-- Pipelines (история запусков)
CREATE TABLE IF NOT EXISTS pipelines (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    task_id TEXT NOT NULL REFERENCES tasks(id),
    project_id TEXT NOT NULL REFERENCES projects(id),
    route_type TEXT NOT NULL,
    steps JSON NOT NULL,
    status TEXT DEFAULT 'running',
    total_cost_usd REAL,
    total_tokens INTEGER,
    total_duration_seconds INTEGER,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    completed_at DATETIME
);

-- Post-pipeline хуки
CREATE TABLE IF NOT EXISTS hooks (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    name TEXT NOT NULL,
    event TEXT NOT NULL,
    trigger_module_path TEXT,
    trigger_module_type TEXT,
    command TEXT NOT NULL,
    working_dir TEXT,
    timeout_seconds INTEGER DEFAULT 120,
    enabled INTEGER DEFAULT 1,
    created_at TEXT DEFAULT (datetime('now'))
);

-- Лог выполнений хуков
CREATE TABLE IF NOT EXISTS hook_logs (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    hook_id INTEGER NOT NULL REFERENCES hooks(id),
    project_id TEXT NOT NULL REFERENCES projects(id),
    task_id TEXT,
    success INTEGER NOT NULL,
    exit_code INTEGER,
    output TEXT,
    error TEXT,
    duration_seconds REAL,
    created_at TEXT DEFAULT (datetime('now'))
);

-- Аудит-лог опасных операций (dangerously-skip-permissions)
CREATE TABLE IF NOT EXISTS audit_log (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
    task_id TEXT REFERENCES tasks(id),
    step_id TEXT,
    event_type TEXT NOT NULL DEFAULT 'dangerous_skip',
    reason TEXT,
    project_id TEXT REFERENCES projects(id)
);

CREATE INDEX IF NOT EXISTS idx_audit_log_task ON audit_log(task_id);
CREATE INDEX IF NOT EXISTS idx_audit_log_event ON audit_log(event_type, timestamp);

-- Кросс-проектные зависимости
CREATE TABLE IF NOT EXISTS project_links (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    from_project TEXT NOT NULL REFERENCES projects(id),
    to_project TEXT NOT NULL REFERENCES projects(id),
    type TEXT NOT NULL,
    description TEXT,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
);

-- Тикеты от пользователей
CREATE TABLE IF NOT EXISTS support_tickets (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    project_id TEXT NOT NULL REFERENCES projects(id),
    source TEXT NOT NULL,
    client_id TEXT,
    client_message TEXT NOT NULL,
    classification TEXT,
    guard_result TEXT,
    guard_reason TEXT,
    anamnesis JSON,
    task_id TEXT REFERENCES tasks(id),
    response TEXT,
    response_approved BOOLEAN DEFAULT FALSE,
    status TEXT DEFAULT 'new',
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
    resolved_at DATETIME
);

-- Настройки бота для каждого проекта
CREATE TABLE IF NOT EXISTS support_bot_config (
    project_id TEXT PRIMARY KEY REFERENCES projects(id),
    telegram_bot_token TEXT,
    welcome_message TEXT,
    faq JSON,
    auto_reply BOOLEAN DEFAULT FALSE,
    require_approval BOOLEAN DEFAULT TRUE,
    brand_voice TEXT,
    forbidden_topics JSON,
    escalation_keywords JSON
);

-- Индексы
CREATE INDEX IF NOT EXISTS idx_tasks_project_status ON tasks(project_id, status);
CREATE INDEX IF NOT EXISTS idx_decisions_project ON decisions(project_id);
CREATE INDEX IF NOT EXISTS idx_decisions_tags ON decisions(tags);
CREATE INDEX IF NOT EXISTS idx_agent_logs_project ON agent_logs(project_id, created_at);
CREATE INDEX IF NOT EXISTS idx_agent_logs_cost ON agent_logs(project_id, cost_usd);
CREATE INDEX IF NOT EXISTS idx_tickets_project ON support_tickets(project_id, status);
CREATE INDEX IF NOT EXISTS idx_tickets_client ON support_tickets(client_id);
"""


def get_connection(db_path: Path = DB_PATH) -> sqlite3.Connection:
    conn = sqlite3.connect(str(db_path))
    conn.execute("PRAGMA journal_mode=WAL")
    conn.execute("PRAGMA foreign_keys=ON")
    conn.row_factory = sqlite3.Row
    return conn


def _migrate(conn: sqlite3.Connection):
    """Run migrations for existing databases."""
    # Check if language column exists on projects
    proj_cols = {r[1] for r in conn.execute("PRAGMA table_info(projects)").fetchall()}
    if "language" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN language TEXT DEFAULT 'ru'")
        conn.commit()
    if "execution_mode" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN execution_mode TEXT NOT NULL DEFAULT 'review'")
        conn.commit()

    # Check if execution_mode column exists on tasks
    task_cols = {r[1] for r in conn.execute("PRAGMA table_info(tasks)").fetchall()}
    if "execution_mode" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN execution_mode TEXT")
        conn.commit()
    if "blocked_reason" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN blocked_reason TEXT")
        conn.commit()

    if "autocommit_enabled" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN autocommit_enabled INTEGER DEFAULT 0")
        conn.commit()

    if "dangerously_skipped" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN dangerously_skipped BOOLEAN DEFAULT 0")
        conn.commit()

    if "revise_comment" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN revise_comment TEXT")
        conn.commit()

    if "category" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN category TEXT DEFAULT NULL")
        conn.commit()

    if "blocked_at" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN blocked_at DATETIME")
        conn.commit()
    if "blocked_agent_role" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN blocked_agent_role TEXT")
        conn.commit()
    if "blocked_pipeline_step" not in task_cols:
        conn.execute("ALTER TABLE tasks ADD COLUMN blocked_pipeline_step TEXT")
        conn.commit()

    if "obsidian_vault_path" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN obsidian_vault_path TEXT")
        conn.commit()

    if "deploy_command" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN deploy_command TEXT")
        conn.commit()

    if "project_type" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN project_type TEXT DEFAULT 'development'")
        conn.commit()

    if "ssh_host" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN ssh_host TEXT")
        conn.commit()

    if "ssh_user" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN ssh_user TEXT")
        conn.commit()

    if "ssh_key_path" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN ssh_key_path TEXT")
        conn.commit()

    if "ssh_proxy_jump" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN ssh_proxy_jump TEXT")
        conn.commit()

    if "description" not in proj_cols:
        conn.execute("ALTER TABLE projects ADD COLUMN description TEXT")
        conn.commit()

    # Migrate audit_log + project_phases tables
    existing_tables = {r[0] for r in conn.execute(
        "SELECT name FROM sqlite_master WHERE type='table'"
    ).fetchall()}
    if "project_phases" not in existing_tables:
        conn.executescript("""
            CREATE TABLE IF NOT EXISTS project_phases (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                project_id TEXT NOT NULL REFERENCES projects(id),
                role TEXT NOT NULL,
                phase_order INTEGER NOT NULL,
                status TEXT DEFAULT 'pending',
                task_id TEXT REFERENCES tasks(id),
                revise_count INTEGER DEFAULT 0,
                created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
                updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
            );
            CREATE INDEX IF NOT EXISTS idx_phases_project ON project_phases(project_id, phase_order);
        """)
        conn.commit()
    # Migrate project_phases columns (table may already exist without revise_comment)
    phase_cols = {r[1] for r in conn.execute("PRAGMA table_info(project_phases)").fetchall()}
    if "revise_comment" not in phase_cols:
        conn.execute("ALTER TABLE project_phases ADD COLUMN revise_comment TEXT")
        conn.commit()

    if "audit_log" not in existing_tables:
        conn.executescript("""
            CREATE TABLE IF NOT EXISTS audit_log (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
                task_id TEXT REFERENCES tasks(id),
                step_id TEXT,
                event_type TEXT NOT NULL DEFAULT 'dangerous_skip',
                reason TEXT,
                project_id TEXT REFERENCES projects(id)
            );
            CREATE INDEX IF NOT EXISTS idx_audit_log_task ON audit_log(task_id);
            CREATE INDEX IF NOT EXISTS idx_audit_log_event ON audit_log(event_type, timestamp);
        """)
        conn.commit()

    # Rename legacy 'auto' → 'auto_complete' (KIN-063)
    conn.execute(
        "UPDATE projects SET execution_mode = 'auto_complete' WHERE execution_mode = 'auto'"
    )
    conn.execute(
        "UPDATE tasks SET execution_mode = 'auto_complete' WHERE execution_mode = 'auto'"
    )
    conn.commit()


def _seed_default_hooks(conn: sqlite3.Connection):
    """Seed default hooks for the kin project (idempotent).

    Creates rebuild-frontend hook only when:
    - project 'kin' exists in the projects table
    - the hook doesn't already exist (no duplicate)
    """
    kin_exists = conn.execute(
        "SELECT 1 FROM projects WHERE id = 'kin'"
    ).fetchone()
    if not kin_exists:
        return

    exists = conn.execute(
        "SELECT 1 FROM hooks"
        " WHERE project_id = 'kin'"
        "   AND name = 'rebuild-frontend'"
        "   AND event = 'pipeline_completed'"
    ).fetchone()
    if not exists:
        conn.execute(
            """INSERT INTO hooks (project_id, name, event, command, enabled)
               VALUES ('kin', 'rebuild-frontend', 'pipeline_completed',
                       'cd /Users/grosfrumos/projects/kin/web/frontend && npm run build',
                       1)"""
        )
        conn.commit()

    # Enable autocommit for kin project (opt-in, idempotent)
    conn.execute(
        "UPDATE projects SET autocommit_enabled=1 WHERE id='kin' AND autocommit_enabled=0"
    )
    conn.commit()


def init_db(db_path: Path = DB_PATH) -> sqlite3.Connection:
    conn = get_connection(db_path)
    conn.executescript(SCHEMA)
    conn.commit()
    _migrate(conn)
    _seed_default_hooks(conn)
    return conn


if __name__ == "__main__":
    conn = init_db()
    tables = conn.execute(
        "SELECT name FROM sqlite_master WHERE type='table' ORDER BY name"
    ).fetchall()
    print(f"Initialized {len(tables)} tables:")
    for t in tables:
        print(f"  - {t['name']}")
    conn.close()