CREATE TABLE IF NOT EXISTS email_templates (
    id BIGSERIAL PRIMARY KEY,
    slug VARCHAR(100) NOT NULL UNIQUE,
    name VARCHAR(200) NOT NULL,
    subject TEXT NOT NULL,
    body_text TEXT NOT NULL,
    body_html TEXT NOT NULL,
    variables JSONB NOT NULL DEFAULT '[]'::jsonb,
    is_system BOOLEAN NOT NULL DEFAULT FALSE,
    status VARCHAR(20) NOT NULL DEFAULT 'ACTIVE' CHECK (status IN ('ACTIVE', 'INACTIVE')),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ
);

CREATE INDEX IF NOT EXISTS idx_email_templates_status ON email_templates(status);
CREATE INDEX IF NOT EXISTS idx_email_templates_slug ON email_templates(slug);

INSERT INTO email_templates (slug, name, subject, body_text, body_html, variables, is_system, status)
VALUES
(
    'otp',
    'One-Time Password',
    'Yimaru - One Time Password',
    'Welcome to Yimaru Online Learning Platform{{if .FirstName}}, {{.FirstName}}{{end}}. Your OTP is {{.OTP}}. It expires in {{.ExpiresMinutes}} minutes. Please do not share it with anyone.',
    '<p>Welcome to Yimaru Online Learning Platform{{if .FirstName}}, <strong>{{.FirstName}}</strong>{{end}}.</p><p>Your one-time password is <strong>{{.OTP}}</strong>.</p><p>It expires in {{.ExpiresMinutes}} minutes. Please do not share it with anyone.</p>',
    '["OTP", "FirstName", "ExpiresMinutes"]'::jsonb,
    TRUE,
    'ACTIVE'
),
(
    'invitation',
    'User Invitation',
    'You are invited to join Yimaru',
    'Hi{{if .FirstName}} {{.FirstName}}{{end}}, you have been invited{{if .InviterName}} by {{.InviterName}}{{end}} to join Yimaru Online Learning Platform. Accept your invitation: {{.InviteLink}}',
    '<p>Hi{{if .FirstName}} <strong>{{.FirstName}}</strong>{{end}},</p><p>You have been invited{{if .InviterName}} by <strong>{{.InviterName}}</strong>{{end}} to join Yimaru Online Learning Platform.</p><p><a href="{{.InviteLink}}">Accept your invitation</a></p>',
    '["FirstName", "InviterName", "InviteLink"]'::jsonb,
    TRUE,
    'ACTIVE'
),
(
    'password_reset',
    'Password Reset',
    'Reset your Yimaru password',
    'Hi{{if .FirstName}} {{.FirstName}}{{end}}, use this link to reset your password: {{.ResetLink}}. The link expires in {{.ExpiresMinutes}} minutes.',
    '<p>Hi{{if .FirstName}} <strong>{{.FirstName}}</strong>{{end}},</p><p>Use the link below to reset your password. It expires in {{.ExpiresMinutes}} minutes.</p><p><a href="{{.ResetLink}}">Reset your password</a></p>',
    '["FirstName", "ResetLink", "ExpiresMinutes"]'::jsonb,
    TRUE,
    'ACTIVE'
),
(
    'welcome',
    'Welcome Email',
    'Welcome to Yimaru',
    'Hi{{if .FirstName}} {{.FirstName}}{{end}}, welcome to Yimaru Online Learning Platform! Sign in at {{.LoginURL}} to get started.',
    '<p>Hi{{if .FirstName}} <strong>{{.FirstName}}</strong>{{end}},</p><p>Welcome to Yimaru Online Learning Platform!</p><p><a href="{{.LoginURL}}">Sign in to get started</a></p>',
    '["FirstName", "LoginURL"]'::jsonb,
    TRUE,
    'ACTIVE'
),
(
    'custom_message',
    'Custom Message',
    '{{.Subject}}',
    '{{.Message}}',
    '<p>{{.Message}}</p>',
    '["Subject", "Message"]'::jsonb,
    TRUE,
    'ACTIVE'
)
ON CONFLICT (slug) DO NOTHING;