-- ============================================================
-- Gym Tracker — SQLite schema v2
-- Гибкие справочники + мультиклиентская схема
-- ============================================================

PRAGMA foreign_keys = ON;
PRAGMA journal_mode = WAL;

-- ============================================================
-- 1. КЛИЕНТЫ (люди, чьи тренировки ведём)
-- ============================================================
CREATE TABLE clients (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,             -- UUID для синхронизации
    full_name TEXT NOT NULL,
    birth_date TEXT,                          -- ISO8601 (YYYY-MM-DD)
    goal TEXT DEFAULT '',                     -- цель тренировок
    notes TEXT DEFAULT '',
    is_active INTEGER NOT NULL DEFAULT 1,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
);

CREATE INDEX idx_clients_name ON clients(full_name);
CREATE INDEX idx_clients_active ON clients(is_active);

-- ============================================================
-- 2. СПРАВОЧНИК ТИПОВ ТРЕНИРОВОК
-- ============================================================
CREATE TABLE workout_types (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    name TEXT NOT NULL UNIQUE,
    sort_order INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
);

-- ============================================================
-- 3. СПРАВОЧНИК УПРАЖНЕНИЙ
-- ============================================================
CREATE TABLE exercises (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    workout_type_id INTEGER,                  -- FK на workout_types
    name TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (workout_type_id) REFERENCES workout_types(id) ON DELETE SET NULL
);

CREATE INDEX idx_exercises_name ON exercises(name);
CREATE INDEX idx_exercises_type ON exercises(workout_type_id);

-- ============================================================
-- 4. ТРЕНИРОВКИ
-- ============================================================
CREATE TABLE workouts (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    client_id INTEGER,                        -- FK на clients
    workout_type_id INTEGER,                  -- FK на workout_types
    start_time TEXT NOT NULL,                 -- ISO8601
    end_time TEXT,                            -- NULL = активная
    notes TEXT DEFAULT '',
    synced INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (client_id) REFERENCES clients(id) ON DELETE SET NULL,
    FOREIGN KEY (workout_type_id) REFERENCES workout_types(id) ON DELETE SET NULL
);

CREATE INDEX idx_workouts_client ON workouts(client_id);
CREATE INDEX idx_workouts_start ON workouts(start_time);
CREATE INDEX idx_workouts_synced ON workouts(synced);

-- ============================================================
-- 5. УПРАЖНЕНИЯ ВНУТРИ ТРЕНИРОВКИ
-- ============================================================
CREATE TABLE workout_exercises (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    workout_id INTEGER NOT NULL,
    exercise_id INTEGER,                      -- FK на exercises (может быть NULL)
    exercise_name TEXT NOT NULL,              -- дублируем для истории
    sort_order INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (workout_id) REFERENCES workouts(id) ON DELETE CASCADE,
    FOREIGN KEY (exercise_id) REFERENCES exercises(id) ON DELETE SET NULL
);

CREATE INDEX idx_wex_workout ON workout_exercises(workout_id);
CREATE INDEX idx_wex_exercise ON workout_exercises(exercise_id);
CREATE INDEX idx_wex_name ON workout_exercises(exercise_name);

-- ============================================================
-- 6. ПОДХОДЫ
-- ============================================================
CREATE TABLE sets (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    workout_exercise_id INTEGER NOT NULL,
    is_dropset INTEGER NOT NULL DEFAULT 0,
    weight REAL,
    reps INTEGER,
    rating INTEGER CHECK (rating BETWEEN 1 AND 5),
    notes TEXT DEFAULT '',
    sort_order INTEGER NOT NULL DEFAULT 0,
    timestamp TEXT NOT NULL,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (workout_exercise_id) REFERENCES workout_exercises(id) ON DELETE CASCADE,
    
    CHECK (
        (is_dropset = 0 AND weight IS NOT NULL AND reps IS NOT NULL) OR
        (is_dropset = 1 AND weight IS NULL AND reps IS NULL)
    )
);

CREATE INDEX idx_sets_wex ON sets(workout_exercise_id);
CREATE INDEX idx_sets_timestamp ON sets(timestamp);

-- ============================================================
-- 7. ЭЛЕМЕНТЫ ДРОП-СЕТА
-- ============================================================
CREATE TABLE dropset_items (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    set_id INTEGER NOT NULL,
    weight REAL NOT NULL,
    reps INTEGER NOT NULL,
    sort_order INTEGER NOT NULL DEFAULT 0,
    
    FOREIGN KEY (set_id) REFERENCES sets(id) ON DELETE CASCADE,
    CHECK (weight > 0 AND reps > 0)
);

CREATE INDEX idx_dropset_set ON dropset_items(set_id);

-- ============================================================
-- 8. КАРДИО
-- ============================================================
CREATE TABLE cardio (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    workout_id INTEGER NOT NULL,
    cardio_type TEXT NOT NULL CHECK (cardio_type IN (
        'вело', 'ходьба', 'бег', 'эллипс', 'гребля'
    )),
    purpose TEXT NOT NULL CHECK (purpose IN (
        'warmup', 'cooldown', 'separate'
    )),
    duration INTEGER,
    distance REAL,
    speed REAL,
    incline REAL,
    resistance INTEGER,
    notes TEXT DEFAULT '',
    sort_order INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (workout_id) REFERENCES workouts(id) ON DELETE CASCADE
);

CREATE INDEX idx_cardio_workout ON cardio(workout_id);
CREATE INDEX idx_cardio_purpose ON cardio(purpose);

-- ============================================================
-- 9. СПРАВОЧНИК ТИПОВ ЗАМЕРОВ ТЕЛА
-- ============================================================
CREATE TABLE metric_types (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    name TEXT NOT NULL UNIQUE,                -- "Вес", "Грудь", "Бицепс", "Предплечье"...
    unit TEXT NOT NULL DEFAULT 'см',          -- единица измерения
    category TEXT DEFAULT 'body',             -- для группировки: body, strength, etc.
    sort_order INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
);

-- ============================================================
-- 10. ЗАМЕРЫ ТЕЛА (факт замера)
-- ============================================================
CREATE TABLE body_metrics (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    sync_id TEXT NOT NULL UNIQUE,
    client_id INTEGER,                        -- FK на clients
    metric_date TEXT NOT NULL,                -- ISO8601
    notes TEXT DEFAULT '',
    created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
    
    FOREIGN KEY (client_id) REFERENCES clients(id) ON DELETE SET NULL
);

CREATE INDEX idx_body_metrics_client ON body_metrics(client_id);
CREATE INDEX idx_body_metrics_date ON body_metrics(metric_date);

-- ============================================================
-- 11. ЗНАЧЕНИЯ ЗАМЕРОВ (нормализованно)
-- ============================================================
CREATE TABLE body_metric_values (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    body_metric_id INTEGER NOT NULL,
    metric_type_id INTEGER NOT NULL,
    value REAL NOT NULL,
    
    FOREIGN KEY (body_metric_id) REFERENCES body_metrics(id) ON DELETE CASCADE,
    FOREIGN KEY (metric_type_id) REFERENCES metric_types(id) ON DELETE CASCADE,
    
    UNIQUE (body_metric_id, metric_type_id)   -- один тип замера — одно значение в замере
);

CREATE INDEX idx_bmv_metric ON body_metric_values(body_metric_id);
CREATE INDEX idx_bmv_type ON body_metric_values(metric_type_id);

-- ============================================================
-- 12. ЛОГ СИНХРОНИЗАЦИИ
-- ============================================================
CREATE TABLE sync_log (
    device_id TEXT PRIMARY KEY,
    last_sync TEXT NOT NULL,
    updated_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
);