-- Migration 022: Goal System (Strategic + Tactical)
-- Date: 2026-03-26
-- Purpose: Two-level goal architecture for AI-driven coaching

-- ============================================================================
-- STRATEGIC LAYER: Goal Modes
-- ============================================================================

-- Add goal_mode to profiles (strategic training direction)
ALTER TABLE profiles ADD COLUMN IF NOT EXISTS goal_mode VARCHAR(50) DEFAULT 'health';

COMMENT ON COLUMN profiles.goal_mode IS
  'Strategic goal mode: weight_loss, strength, endurance, recomposition, health.
   Determines score weights and interpretation context for all analyses.';

-- ============================================================================
-- TACTICAL LAYER: Concrete Goal Targets
-- ============================================================================

CREATE TABLE IF NOT EXISTS goals (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  profile_id UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,

  -- Goal Classification
  goal_type VARCHAR(50) NOT NULL,  -- weight, body_fat, lean_mass, vo2max, strength, flexibility, bp, rhr
  is_primary BOOLEAN DEFAULT false,
  status VARCHAR(20) DEFAULT 'active',  -- draft, active, reached, abandoned, expired

  -- Target Values
  target_value DECIMAL(10,2),
  current_value DECIMAL(10,2),
  start_value DECIMAL(10,2),
  unit VARCHAR(20),  -- kg, %, ml/kg/min, bpm, mmHg, cm, reps

  -- Timeline
  start_date DATE DEFAULT CURRENT_DATE,
  target_date DATE,
  reached_date DATE,

  -- Metadata
  name VARCHAR(100),  -- e.g., "Sommerfigur 2026"
  description TEXT,

  -- Progress Tracking
  progress_pct DECIMAL(5,2),  -- Auto-calculated: (current - start) / (target - start) * 100
  projection_date DATE,  -- Prognose wann Ziel erreicht wird
  on_track BOOLEAN,  -- true wenn Prognose <= target_date

  -- Timestamps
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_goals_profile ON goals(profile_id);
CREATE INDEX IF NOT EXISTS idx_goals_status ON goals(profile_id, status);
CREATE INDEX IF NOT EXISTS idx_goals_primary ON goals(profile_id, is_primary) WHERE is_primary = true;

COMMENT ON TABLE goals IS 'Concrete user goals (tactical targets)';
COMMENT ON COLUMN goals.goal_type IS 'Type of goal: weight, body_fat, lean_mass, vo2max, strength, flexibility, bp, rhr';
COMMENT ON COLUMN goals.is_primary IS 'Primary goal gets highest priority in scoring and charts';
COMMENT ON COLUMN goals.status IS 'draft = not yet started, active = in progress, reached = successfully completed, abandoned = given up, expired = deadline passed';
COMMENT ON COLUMN goals.progress_pct IS 'Percentage progress: (current_value - start_value) / (target_value - start_value) * 100';
COMMENT ON COLUMN goals.projection_date IS 'Projected date when goal will be reached based on current trend';
COMMENT ON COLUMN goals.on_track IS 'true if projection_date <= target_date (goal reachable on time)';

-- ============================================================================
-- TRAINING PHASES (Auto-Detection)
-- ============================================================================

CREATE TABLE IF NOT EXISTS training_phases (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  profile_id UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,

  -- Phase Classification
  phase_type VARCHAR(50) NOT NULL,  -- calorie_deficit, calorie_surplus, deload, maintenance, periodization
  detected_automatically BOOLEAN DEFAULT false,
  confidence_score DECIMAL(3,2),  -- 0.00 - 1.00 (Wie sicher ist die Erkennung?)
  status VARCHAR(20) DEFAULT 'suggested',  -- suggested, accepted, active, completed, rejected

  -- Timeframe
  start_date DATE NOT NULL,
  end_date DATE,
  duration_days INT,

  -- Detection Criteria (JSONB für Flexibilität)
  detection_params JSONB,  -- { "avg_calories": 1800, "weight_trend": -0.3, ... }

  -- User Notes
  notes TEXT,

  -- Timestamps
  created_at TIMESTAMP DEFAULT NOW(),
  updated_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_training_phases_profile ON training_phases(profile_id);
CREATE INDEX IF NOT EXISTS idx_training_phases_status ON training_phases(profile_id, status);
CREATE INDEX IF NOT EXISTS idx_training_phases_dates ON training_phases(profile_id, start_date, end_date);

COMMENT ON TABLE training_phases IS 'Training phases detected from data patterns or manually defined';
COMMENT ON COLUMN training_phases.phase_type IS 'calorie_deficit, calorie_surplus, deload, maintenance, periodization';
COMMENT ON COLUMN training_phases.detected_automatically IS 'true if AI detected this phase from data patterns';
COMMENT ON COLUMN training_phases.confidence_score IS 'AI confidence in detection (0.0 - 1.0)';
COMMENT ON COLUMN training_phases.status IS 'suggested = AI proposed, accepted = user confirmed, active = currently running, completed = finished, rejected = user dismissed';
COMMENT ON COLUMN training_phases.detection_params IS 'JSON with detection criteria: avg_calories, weight_trend, activity_volume, etc.';

-- ============================================================================
-- FITNESS TESTS (Standardized Performance Tests)
-- ============================================================================

CREATE TABLE IF NOT EXISTS fitness_tests (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  profile_id UUID NOT NULL REFERENCES profiles(id) ON DELETE CASCADE,

  -- Test Type
  test_type VARCHAR(50) NOT NULL,  -- cooper_12min, step_test, pushups_max, plank_max, flexibility_sit_reach, vo2max_est, strength_1rm_squat, strength_1rm_bench
  result_value DECIMAL(10,2) NOT NULL,
  result_unit VARCHAR(20) NOT NULL,  -- meters, bpm, reps, seconds, cm, ml/kg/min, kg

  -- Test Metadata
  test_date DATE NOT NULL,
  test_conditions TEXT,  -- Optional: Notizen zu Bedingungen
  norm_category VARCHAR(30),  -- sehr gut, gut, durchschnitt, unterdurchschnitt, schlecht

  -- Timestamps
  created_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_fitness_tests_profile ON fitness_tests(profile_id);
CREATE INDEX IF NOT EXISTS idx_fitness_tests_type ON fitness_tests(profile_id, test_type);
CREATE INDEX IF NOT EXISTS idx_fitness_tests_date ON fitness_tests(profile_id, test_date);

COMMENT ON TABLE fitness_tests IS 'Standardized fitness tests (Cooper, step test, strength tests, etc.)';
COMMENT ON COLUMN fitness_tests.test_type IS 'cooper_12min, step_test, pushups_max, plank_max, flexibility_sit_reach, vo2max_est, strength_1rm_squat, strength_1rm_bench';
COMMENT ON COLUMN fitness_tests.norm_category IS 'Performance category based on age/gender norms';